/**********************************************************************
parse.y -
$Author: jkh $
$Date: 2002/05/27 17:59:44 $
created at: Fri May 28 18:02:42 JST 1993
Copyright (C) 1993-2001 Yukihiro Matsumoto
**********************************************************************/
%{
#define YYDEBUG 1
#include "ruby.h"
#include "env.h"
#include "node.h"
#include "st.h"
#include <stdio.h>
#include <errno.h>
#define ID_SCOPE_SHIFT 3
#define ID_SCOPE_MASK 0x07
#define ID_LOCAL 0x01
#define ID_INSTANCE 0x02
#define ID_GLOBAL 0x03
#define ID_ATTRSET 0x04
#define ID_CONST 0x05
#define ID_CLASS 0x06
#define is_notop_id(id) ((id)>LAST_TOKEN)
#define is_local_id(id) (is_notop_id(id)&&((id)&ID_SCOPE_MASK)==ID_LOCAL)
#define is_global_id(id) (is_notop_id(id)&&((id)&ID_SCOPE_MASK)==ID_GLOBAL)
#define is_instance_id(id) (is_notop_id(id)&&((id)&ID_SCOPE_MASK)==ID_INSTANCE)
#define is_attrset_id(id) (is_notop_id(id)&&((id)&ID_SCOPE_MASK)==ID_ATTRSET)
#define is_const_id(id) (is_notop_id(id)&&((id)&ID_SCOPE_MASK)==ID_CONST)
#define is_class_id(id) (is_notop_id(id)&&((id)&ID_SCOPE_MASK)==ID_CLASS)
NODE *ruby_eval_tree_begin = 0;
NODE *ruby_eval_tree = 0;
char *ruby_sourcefile; /* current source file */
int ruby_sourceline; /* current line no. */
static int yylex();
static int yyerror();
static enum lex_state {
EXPR_BEG, /* ignore newline, +/- is a sign. */
EXPR_END, /* newline significant, +/- is a operator. */
EXPR_ARG, /* newline significant, +/- is a operator. */
EXPR_MID, /* newline significant, +/- is a operator. */
EXPR_FNAME, /* ignore newline, no reserved words. */
EXPR_DOT, /* right after `.' or `::', no reserved words. */
EXPR_CLASS, /* immediate after `class', no here document. */
} lex_state;
#if SIZEOF_LONG_LONG > 0
typedef unsigned long long stack_type;
#elif SIZEOF___INT64 > 0
typedef unsigned __int64 stack_type;
#else
typedef unsigned long stack_type;
#endif
static int cond_nest = 0;
static stack_type cond_stack = 0;
#define COND_PUSH do {\
cond_nest++;\
cond_stack = (cond_stack<<1)|1;\
} while(0)
#define COND_POP do {\
cond_nest--;\
cond_stack >>= 1;\
} while (0)
#define COND_P() (cond_nest > 0 && (cond_stack&1))
static stack_type cmdarg_stack = 0;
#define CMDARG_PUSH do {\
cmdarg_stack = (cmdarg_stack<<1)|1;\
} while(0)
#define CMDARG_POP do {\
cmdarg_stack >>= 1;\
} while (0)
#define CMDARG_P() (cmdarg_stack && (cmdarg_stack&1))
static int class_nest = 0;
static int in_single = 0;
static int in_def = 0;
static int compile_for_eval = 0;
static ID cur_mid = 0;
static NODE *cond();
static NODE *logop();
static NODE *newline_node();
static void fixpos();
static int value_expr();
static void void_expr();
static void void_stmts();
static NODE *block_append();
static NODE *list_append();
static NODE *list_concat();
static NODE *arg_concat();
static NODE *call_op();
static int in_defined = 0;
static NODE *arg_blk_pass();
static NODE *new_call();
static NODE *new_fcall();
static NODE *new_super();
static NODE *gettable();
static NODE *assignable();
static NODE *aryset();
static NODE *attrset();
static void rb_backref_error();
static NODE *node_assign();
static NODE *match_gen();
static void local_push();
static void local_pop();
static int local_append();
static int local_cnt();
static int local_id();
static ID *local_tbl();
static struct RVarmap *dyna_push();
static void dyna_pop();
static int dyna_in_block();
static void top_local_init();
static void top_local_setup();
%}
%union {
NODE *node;
VALUE val;
ID id;
int num;
struct RVarmap *vars;
}
%token kCLASS
kMODULE
kDEF
kUNDEF
kBEGIN
kRESCUE
kENSURE
kEND
kIF
kUNLESS
kTHEN
kELSIF
kELSE
kCASE
kWHEN
kWHILE
kUNTIL
kFOR
kBREAK
kNEXT
kREDO
kRETRY
kIN
kDO
kDO_COND
kDO_BLOCK
kRETURN
kYIELD
kSUPER
kSELF
kNIL
kTRUE
kFALSE
kAND
kOR
kNOT
kIF_MOD
kUNLESS_MOD
kWHILE_MOD
kUNTIL_MOD
kRESCUE_MOD
kALIAS
kDEFINED
klBEGIN
klEND
k__LINE__
k__FILE__
%token <id> tIDENTIFIER tFID tGVAR tIVAR tCONSTANT tCVAR
%token <val> tINTEGER tFLOAT tSTRING tXSTRING tREGEXP
%token <node> tDSTRING tDXSTRING tDREGEXP tNTH_REF tBACK_REF tQWORDS
%type <node> singleton string
%type <val> literal numeric
%type <node> compstmt stmts stmt expr arg primary command command_call method_call
%type <node> if_tail opt_else case_body cases rescue exc_list exc_var ensure
%type <node> args ret_args when_args call_args paren_args opt_paren_args
%type <node> command_args aref_args opt_block_arg block_arg var_ref
%type <node> mrhs mrhs_basic superclass block_call block_command
%type <node> f_arglist f_args f_optarg f_opt f_block_arg opt_f_block_arg
%type <node> assoc_list assocs assoc undef_list backref
%type <node> block_var opt_block_var brace_block do_block lhs none
%type <node> mlhs mlhs_head mlhs_basic mlhs_entry mlhs_item mlhs_node
%type <id> fitem variable sym symbol operation operation2 operation3
%type <id> cname fname op f_rest_arg
%type <num> f_norm_arg f_arg
%token tUPLUS /* unary+ */
%token tUMINUS /* unary- */
%token tPOW /* ** */
%token tCMP /* <=> */
%token tEQ /* == */
%token tEQQ /* === */
%token tNEQ /* != */
%token tGEQ /* >= */
%token tLEQ /* <= */
%token tANDOP tOROP /* && and || */
%token tMATCH tNMATCH /* =~ and !~ */
%token tDOT2 tDOT3 /* .. and ... */
%token tAREF tASET /* [] and []= */
%token tLSHFT tRSHFT /* << and >> */
%token tCOLON2 /* :: */
%token tCOLON3 /* :: at EXPR_BEG */
%token <id> tOP_ASGN /* +=, -= etc. */
%token tASSOC /* => */
%token tLPAREN /* ( */
%token tLBRACK /* [ */
%token tLBRACE /* { */
%token tSTAR /* * */
%token tAMPER /* & */
%token tSYMBEG
/*
* precedence table
*/
%left kIF_MOD kUNLESS_MOD kWHILE_MOD kUNTIL_MOD kRESCUE_MOD
%left kOR kAND
%right kNOT
%nonassoc kDEFINED
%right '=' tOP_ASGN
%right '?' ':'
%nonassoc tDOT2 tDOT3
%left tOROP
%left tANDOP
%nonassoc tCMP tEQ tEQQ tNEQ tMATCH tNMATCH
%left '>' tGEQ '<' tLEQ
%left '|' '^'
%left '&'
%left tLSHFT tRSHFT
%left '+' '-'
%left '*' '/' '%'
%right '!' '~' tUPLUS tUMINUS
%right tPOW
%token LAST_TOKEN
%%
program : {
$<vars>$ = ruby_dyna_vars;
lex_state = EXPR_BEG;
top_local_init();
if ((VALUE)ruby_class == rb_cObject) class_nest = 0;
else class_nest = 1;
}
compstmt
{
if ($2 && !compile_for_eval) {
/* last expression should not be void */
if (nd_type($2) != NODE_BLOCK) void_expr($2);
else {
NODE *node = $2;
while (node->nd_next) {
node = node->nd_next;
}
void_expr(node->nd_head);
}
}
ruby_eval_tree = block_append(ruby_eval_tree, $2);
top_local_setup();
class_nest = 0;
ruby_dyna_vars = $<vars>1;
}
compstmt : stmts opt_terms
{
void_stmts($1);
$$ = $1;
}
stmts : none
| stmt
{
$$ = newline_node($1);
}
| stmts terms stmt
{
$$ = block_append($1, newline_node($3));
}
| error stmt
{
$$ = $2;
}
stmt : kALIAS fitem {lex_state = EXPR_FNAME;} fitem
{
if (in_def || in_single)
yyerror("alias within method");
$$ = NEW_ALIAS($2, $4);
}
| kALIAS tGVAR tGVAR
{
if (in_def || in_single)
yyerror("alias within method");
$$ = NEW_VALIAS($2, $3);
}
| kALIAS tGVAR tBACK_REF
{
char buf[3];
if (in_def || in_single)
yyerror("alias within method");
sprintf(buf, "$%c", $3->nd_nth);
$$ = NEW_VALIAS($2, rb_intern(buf));
}
| kALIAS tGVAR tNTH_REF
{
yyerror("can't make alias for the number variables");
$$ = 0;
}
| kUNDEF undef_list
{
if (in_def || in_single)
yyerror("undef within method");
$$ = $2;
}
| stmt kIF_MOD expr
{
value_expr($3);
$$ = NEW_IF(cond($3), $1, 0);
fixpos($$, $3);
}
| stmt kUNLESS_MOD expr
{
value_expr($3);
$$ = NEW_UNLESS(cond($3), $1, 0);
fixpos($$, $3);
}
| stmt kWHILE_MOD expr
{
value_expr($3);
if ($1 && nd_type($1) == NODE_BEGIN) {
$$ = NEW_WHILE(cond($3), $1->nd_body, 0);
}
else {
$$ = NEW_WHILE(cond($3), $1, 1);
}
}
| stmt kUNTIL_MOD expr
{
value_expr($3);
if ($1 && nd_type($1) == NODE_BEGIN) {
$$ = NEW_UNTIL(cond($3), $1->nd_body, 0);
}
else {
$$ = NEW_UNTIL(cond($3), $1, 1);
}
}
| stmt kRESCUE_MOD stmt
{
$$ = NEW_RESCUE($1, NEW_RESBODY(0,$3,0), 0);
}
| klBEGIN
{
if (in_def || in_single) {
yyerror("BEGIN in method");
}
local_push();
}
'{' compstmt '}'
{
ruby_eval_tree_begin = block_append(ruby_eval_tree_begin,
NEW_PREEXE($4));
local_pop();
$$ = 0;
}
| klEND '{' compstmt '}'
{
if (compile_for_eval && (in_def || in_single)) {
yyerror("END in method; use at_exit");
}
$$ = NEW_ITER(0, NEW_POSTEXE(), $3);
}
| lhs '=' command_call
{
value_expr($3);
$$ = node_assign($1, $3);
}
| mlhs '=' command_call
{
value_expr($3);
$1->nd_value = $3;
$$ = $1;
}
| lhs '=' mrhs_basic
{
$$ = node_assign($1, $3);
}
| expr
expr : mlhs '=' mrhs
{
value_expr($3);
$1->nd_value = $3;
$$ = $1;
}
| kRETURN ret_args
{
if (!compile_for_eval && !in_def && !in_single)
yyerror("return appeared outside of method");
$$ = NEW_RETURN($2);
}
| command_call
| expr kAND expr
{
$$ = logop(NODE_AND, $1, $3);
}
| expr kOR expr
{
$$ = logop(NODE_OR, $1, $3);
}
| kNOT expr
{
value_expr($2);
$$ = NEW_NOT(cond($2));
}
| '!' command_call
{
$$ = NEW_NOT(cond($2));
}
| arg
command_call : command
| block_command
block_command : block_call
| block_call '.' operation2 command_args
{
value_expr($1);
$$ = new_call($1, $3, $4);
}
| block_call tCOLON2 operation2 command_args
{
value_expr($1);
$$ = new_call($1, $3, $4);
}
command : operation command_args
{
$$ = new_fcall($1, $2);
fixpos($$, $2);
}
| primary '.' operation2 command_args
{
value_expr($1);
$$ = new_call($1, $3, $4);
fixpos($$, $1);
}
| primary tCOLON2 operation2 command_args
{
value_expr($1);
$$ = new_call($1, $3, $4);
fixpos($$, $1);
}
| kSUPER command_args
{
if (!compile_for_eval && !in_def && !in_single)
yyerror("super called outside of method");
$$ = new_super($2);
fixpos($$, $2);
}
| kYIELD ret_args
{
$$ = NEW_YIELD($2);
fixpos($$, $2);
}
mlhs : mlhs_basic
| tLPAREN mlhs_entry ')'
{
$$ = $2;
}
mlhs_entry : mlhs_basic
| tLPAREN mlhs_entry ')'
{
$$ = NEW_MASGN(NEW_LIST($2), 0);
}
mlhs_basic : mlhs_head
{
$$ = NEW_MASGN($1, 0);
}
| mlhs_head mlhs_item
{
$$ = NEW_MASGN(list_append($1,$2), 0);
}
| mlhs_head tSTAR mlhs_node
{
$$ = NEW_MASGN($1, $3);
}
| mlhs_head tSTAR
{
$$ = NEW_MASGN($1, -1);
}
| tSTAR mlhs_node
{
$$ = NEW_MASGN(0, $2);
}
| tSTAR
{
$$ = NEW_MASGN(0, -1);
}
mlhs_item : mlhs_node
| tLPAREN mlhs_entry ')'
{
$$ = $2;
}
mlhs_head : mlhs_item ','
{
$$ = NEW_LIST($1);
}
| mlhs_head mlhs_item ','
{
$$ = list_append($1, $2);
}
mlhs_node : variable
{
$$ = assignable($1, 0);
}
| primary '[' aref_args ']'
{
$$ = aryset($1, $3);
}
| primary '.' tIDENTIFIER
{
$$ = attrset($1, $3);
}
| primary tCOLON2 tIDENTIFIER
{
$$ = attrset($1, $3);
}
| primary '.' tCONSTANT
{
$$ = attrset($1, $3);
}
| backref
{
rb_backref_error($1);
$$ = 0;
}
lhs : variable
{
$$ = assignable($1, 0);
}
| primary '[' aref_args ']'
{
$$ = aryset($1, $3);
}
| primary '.' tIDENTIFIER
{
$$ = attrset($1, $3);
}
| primary tCOLON2 tIDENTIFIER
{
$$ = attrset($1, $3);
}
| primary '.' tCONSTANT
{
$$ = attrset($1, $3);
}
| backref
{
rb_backref_error($1);
$$ = 0;
}
cname : tIDENTIFIER
{
yyerror("class/module name must be CONSTANT");
}
| tCONSTANT
fname : tIDENTIFIER
| tCONSTANT
| tFID
| op
{
lex_state = EXPR_END;
$$ = $1;
}
| reswords
{
lex_state = EXPR_END;
$$ = $<id>1;
}
fitem : fname
| symbol
undef_list : fitem
{
$$ = NEW_UNDEF($1);
}
| undef_list ',' {lex_state = EXPR_FNAME;} fitem
{
$$ = block_append($1, NEW_UNDEF($4));
}
op : '|' { $$ = '|'; }
| '^' { $$ = '^'; }
| '&' { $$ = '&'; }
| tCMP { $$ = tCMP; }
| tEQ { $$ = tEQ; }
| tEQQ { $$ = tEQQ; }
| tMATCH { $$ = tMATCH; }
| '>' { $$ = '>'; }
| tGEQ { $$ = tGEQ; }
| '<' { $$ = '<'; }
| tLEQ { $$ = tLEQ; }
| tLSHFT { $$ = tLSHFT; }
| tRSHFT { $$ = tRSHFT; }
| '+' { $$ = '+'; }
| '-' { $$ = '-'; }
| '*' { $$ = '*'; }
| tSTAR { $$ = '*'; }
| '/' { $$ = '/'; }
| '%' { $$ = '%'; }
| tPOW { $$ = tPOW; }
| '~' { $$ = '~'; }
| tUPLUS { $$ = tUPLUS; }
| tUMINUS { $$ = tUMINUS; }
| tAREF { $$ = tAREF; }
| tASET { $$ = tASET; }
| '`' { $$ = '`'; }
reswords : k__LINE__ | k__FILE__ | klBEGIN | klEND
| kALIAS | kAND | kBEGIN | kBREAK | kCASE | kCLASS | kDEF
| kDEFINED | kDO | kELSE | kELSIF | kEND | kENSURE | kFALSE
| kFOR | kIF_MOD | kIN | kMODULE | kNEXT | kNIL | kNOT
| kOR | kREDO | kRESCUE | kRETRY | kRETURN | kSELF | kSUPER
| kTHEN | kTRUE | kUNDEF | kUNLESS_MOD | kUNTIL_MOD | kWHEN
| kWHILE_MOD | kYIELD | kRESCUE_MOD
arg : lhs '=' arg
{
value_expr($3);
$$ = node_assign($1, $3);
}
| variable tOP_ASGN {$$ = assignable($1, 0);} arg
{
if ($<node>3) {
if ($2 == tOROP) {
$<node>3->nd_value = $4;
$$ = NEW_OP_ASGN_OR(gettable($1), $<node>3);
if (is_instance_id($1)) {
$$->nd_aid = $1;
}
}
else if ($2 == tANDOP) {
$<node>3->nd_value = $4;
$$ = NEW_OP_ASGN_AND(gettable($1), $<node>3);
}
else {
$$ = $<node>3;
$$->nd_value = call_op(gettable($1),$2,1,$4);
}
fixpos($$, $4);
}
else {
$$ = 0;
}
}
| primary '[' aref_args ']' tOP_ASGN arg
{
NODE *tmp, *args = NEW_LIST($6);
$3 = list_append($3, NEW_NIL());
list_concat(args, $3);
if ($5 == tOROP) {
$5 = 0;
}
else if ($5 == tANDOP) {
$5 = 1;
}
$$ = NEW_OP_ASGN1($1, $5, args);
fixpos($$, $1);
}
| primary '.' tIDENTIFIER tOP_ASGN arg
{
if ($4 == tOROP) {
$4 = 0;
}
else if ($4 == tANDOP) {
$4 = 1;
}
$$ = NEW_OP_ASGN2($1, $3, $4, $5);
fixpos($$, $1);
}
| primary '.' tCONSTANT tOP_ASGN arg
{
if ($4 == tOROP) {
$4 = 0;
}
else if ($4 == tANDOP) {
$4 = 1;
}
$$ = NEW_OP_ASGN2($1, $3, $4, $5);
fixpos($$, $1);
}
| primary tCOLON2 tIDENTIFIER tOP_ASGN arg
{
if ($4 == tOROP) {
$4 = 0;
}
else if ($4 == tANDOP) {
$4 = 1;
}
$$ = NEW_OP_ASGN2($1, $3, $4, $5);
fixpos($$, $1);
}
| backref tOP_ASGN arg
{
rb_backref_error($1);
$$ = 0;
}
| arg tDOT2 arg
{
$$ = NEW_DOT2($1, $3);
}
| arg tDOT3 arg
{
$$ = NEW_DOT3($1, $3);
}
| arg '+' arg
{
$$ = call_op($1, '+', 1, $3);
}
| arg '-' arg
{
$$ = call_op($1, '-', 1, $3);
}
| arg '*' arg
{
$$ = call_op($1, '*', 1, $3);
}
| arg '/' arg
{
$$ = call_op($1, '/', 1, $3);
}
| arg '%' arg
{
$$ = call_op($1, '%', 1, $3);
}
| arg tPOW arg
{
int need_negate = Qfalse;
if (nd_type($1) == NODE_LIT) {
switch (TYPE($1->nd_lit)) {
case T_FIXNUM:
case T_FLOAT:
case T_BIGNUM:
if (RTEST(rb_funcall($1->nd_lit,'<',1,INT2FIX(0)))) {
$1->nd_lit = rb_funcall($1->nd_lit,rb_intern("-@"),0,0);
need_negate = Qtrue;
}
default:
break;
}
}
$$ = call_op($1, tPOW, 1, $3);
if (need_negate) {
$$ = call_op($$, tUMINUS, 0, 0);
}
}
| tUPLUS arg
{
if ($2 && nd_type($2) == NODE_LIT) {
$$ = $2;
}
else {
$$ = call_op($2, tUPLUS, 0, 0);
}
}
| tUMINUS arg
{
if ($2 && nd_type($2) == NODE_LIT && FIXNUM_P($2->nd_lit)) {
long i = FIX2LONG($2->nd_lit);
$2->nd_lit = INT2FIX(-i);
$$ = $2;
}
else {
$$ = call_op($2, tUMINUS, 0, 0);
}
}
| arg '|' arg
{
$$ = call_op($1, '|', 1, $3);
}
| arg '^' arg
{
$$ = call_op($1, '^', 1, $3);
}
| arg '&' arg
{
$$ = call_op($1, '&', 1, $3);
}
| arg tCMP arg
{
$$ = call_op($1, tCMP, 1, $3);
}
| arg '>' arg
{
$$ = call_op($1, '>', 1, $3);
}
| arg tGEQ arg
{
$$ = call_op($1, tGEQ, 1, $3);
}
| arg '<' arg
{
$$ = call_op($1, '<', 1, $3);
}
| arg tLEQ arg
{
$$ = call_op($1, tLEQ, 1, $3);
}
| arg tEQ arg
{
$$ = call_op($1, tEQ, 1, $3);
}
| arg tEQQ arg
{
$$ = call_op($1, tEQQ, 1, $3);
}
| arg tNEQ arg
{
$$ = NEW_NOT(call_op($1, tEQ, 1, $3));
}
| arg tMATCH arg
{
$$ = match_gen($1, $3);
}
| arg tNMATCH arg
{
$$ = NEW_NOT(match_gen($1, $3));
}
| '!' arg
{
value_expr($2);
$$ = NEW_NOT(cond($2));
}
| '~' arg
{
$$ = call_op($2, '~', 0, 0);
}
| arg tLSHFT arg
{
$$ = call_op($1, tLSHFT, 1, $3);
}
| arg tRSHFT arg
{
$$ = call_op($1, tRSHFT, 1, $3);
}
| arg tANDOP arg
{
$$ = logop(NODE_AND, $1, $3);
}
| arg tOROP arg
{
$$ = logop(NODE_OR, $1, $3);
}
| kDEFINED opt_nl {in_defined = 1;} arg
{
in_defined = 0;
$$ = NEW_DEFINED($4);
}
| arg '?' arg ':' arg
{
value_expr($1);
$$ = NEW_IF(cond($1), $3, $5);
fixpos($$, $1);
}
| primary
{
$$ = $1;
}
aref_args : none
| command_call opt_nl
{
$$ = NEW_LIST($1);
}
| args ',' command_call opt_nl
{
$$ = list_append($1, $3);
}
| args trailer
{
$$ = $1;
}
| args ',' tSTAR arg opt_nl
{
value_expr($4);
$$ = arg_concat($1, $4);
}
| assocs trailer
{
$$ = NEW_LIST(NEW_HASH($1));
}
| tSTAR arg opt_nl
{
value_expr($2);
$$ = NEW_RESTARGS($2);
}
paren_args : '(' none ')'
{
$$ = $2;
}
| '(' call_args opt_nl ')'
{
$$ = $2;
}
| '(' block_call opt_nl ')'
{
$$ = NEW_LIST($2);
}
| '(' args ',' block_call opt_nl ')'
{
$$ = list_append($2, $4);
}
opt_paren_args : none
| paren_args
call_args : command
{
$$ = NEW_LIST($1);
}
| args ',' command
{
$$ = list_append($1, $3);
}
| args opt_block_arg
{
$$ = arg_blk_pass($1, $2);
}
| args ',' tSTAR arg opt_block_arg
{
value_expr($4);
$$ = arg_concat($1, $4);
$$ = arg_blk_pass($$, $5);
}
| assocs opt_block_arg
{
$$ = NEW_LIST(NEW_HASH($1));
$$ = arg_blk_pass($$, $2);
}
| assocs ',' tSTAR arg opt_block_arg
{
value_expr($4);
$$ = arg_concat(NEW_LIST(NEW_HASH($1)), $4);
$$ = arg_blk_pass($$, $5);
}
| args ',' assocs opt_block_arg
{
$$ = list_append($1, NEW_HASH($3));
$$ = arg_blk_pass($$, $4);
}
| args ',' assocs ',' tSTAR arg opt_block_arg
{
value_expr($6);
$$ = arg_concat(list_append($1, NEW_HASH($3)), $6);
$$ = arg_blk_pass($$, $7);
}
| tSTAR arg opt_block_arg
{
value_expr($2);
$$ = arg_blk_pass(NEW_RESTARGS($2), $3);
}
| block_arg
command_args : {CMDARG_PUSH;} call_args
{
CMDARG_POP;
$$ = $2;
}
block_arg : tAMPER arg
{
value_expr($2);
$$ = NEW_BLOCK_PASS($2);
}
opt_block_arg : ',' block_arg
{
$$ = $2;
}
| none
args : arg
{
value_expr($1);
$$ = NEW_LIST($1);
}
| args ',' arg
{
value_expr($3);
$$ = list_append($1, $3);
}
mrhs : arg
{
value_expr($1);
$$ = $1;
}
| mrhs_basic
mrhs_basic : args ',' arg
{
value_expr($3);
$$ = list_append($1, $3);
}
| args ',' tSTAR arg
{
value_expr($4);
$$ = arg_concat($1, $4);
}
| tSTAR arg
{
value_expr($2);
$$ = $2;
}
ret_args : call_args
{
$$ = $1;
if ($1) {
if (nd_type($1) == NODE_ARRAY &&
$1->nd_next == 0) {
$$ = $1->nd_head;
}
else if (nd_type($1) == NODE_BLOCK_PASS) {
rb_compile_error("block argument should not be given");
}
}
}
primary : literal
{
$$ = NEW_LIT($1);
}
| string
| tXSTRING
{
$$ = NEW_XSTR($1);
}
| tQWORDS
| tDXSTRING
| tDREGEXP
| var_ref
| backref
| tFID
{
$$ = NEW_VCALL($1);
}
| kBEGIN
compstmt
rescue
opt_else
ensure
kEND
{
if (!$3 && !$4 && !$5)
$$ = NEW_BEGIN($2);
else {
if ($3) $2 = NEW_RESCUE($2, $3, $4);
else if ($4) {
rb_warn("else without rescue is useless");
$2 = block_append($2, $4);
}
if ($5) $2 = NEW_ENSURE($2, $5);
$$ = $2;
}
fixpos($$, $2);
}
| tLPAREN compstmt ')'
{
$$ = $2;
}
| primary tCOLON2 tCONSTANT
{
value_expr($1);
$$ = NEW_COLON2($1, $3);
}
| tCOLON3 cname
{
$$ = NEW_COLON3($2);
}
| primary '[' aref_args ']'
{
value_expr($1);
$$ = NEW_CALL($1, tAREF, $3);
}
| tLBRACK aref_args ']'
{
if ($2 == 0)
$$ = NEW_ZARRAY(); /* zero length array*/
else {
$$ = $2;
}
}
| tLBRACE assoc_list '}'
{
$$ = NEW_HASH($2);
}
| kRETURN '(' ret_args ')'
{
if (!compile_for_eval && !in_def && !in_single)
yyerror("return appeared outside of method");
value_expr($3);
$$ = NEW_RETURN($3);
}
| kRETURN '(' ')'
{
if (!compile_for_eval && !in_def && !in_single)
yyerror("return appeared outside of method");
$$ = NEW_RETURN(0);
}
| kRETURN
{
if (!compile_for_eval && !in_def && !in_single)
yyerror("return appeared outside of method");
$$ = NEW_RETURN(0);
}
| kYIELD '(' ret_args ')'
{
value_expr($3);
$$ = NEW_YIELD($3);
}
| kYIELD '(' ')'
{
$$ = NEW_YIELD(0);
}
| kYIELD
{
$$ = NEW_YIELD(0);
}
| kDEFINED opt_nl '(' {in_defined = 1;} expr ')'
{
in_defined = 0;
$$ = NEW_DEFINED($5);
}
| operation brace_block
{
$2->nd_iter = NEW_FCALL($1, 0);
$$ = $2;
}
| method_call
| method_call brace_block
{
if ($1 && nd_type($1) == NODE_BLOCK_PASS) {
rb_compile_error("both block arg and actual block given");
}
$2->nd_iter = $1;
$$ = $2;
fixpos($$, $1);
}
| kIF expr then
compstmt
if_tail
kEND
{
value_expr($2);
$$ = NEW_IF(cond($2), $4, $5);
fixpos($$, $2);
}
| kUNLESS expr then
compstmt
opt_else
kEND
{
value_expr($2);
$$ = NEW_UNLESS(cond($2), $4, $5);
fixpos($$, $2);
}
| kWHILE {COND_PUSH;} expr do {COND_POP;}
compstmt
kEND
{
value_expr($3);
$$ = NEW_WHILE(cond($3), $6, 1);
fixpos($$, $3);
}
| kUNTIL {COND_PUSH;} expr do {COND_POP;}
compstmt
kEND
{
value_expr($3);
$$ = NEW_UNTIL(cond($3), $6, 1);
fixpos($$, $3);
}
| kCASE expr opt_terms
case_body
kEND
{
value_expr($2);
$$ = NEW_CASE($2, $4);
fixpos($$, $2);
}
| kCASE opt_terms case_body kEND
{
$$ = $3;
}
| kFOR block_var kIN {COND_PUSH;} expr do {COND_POP;}
compstmt
kEND
{
value_expr($5);
$$ = NEW_FOR($2, $5, $8);
fixpos($$, $2);
}
| kCLASS cname superclass
{
if (in_def || in_single)
yyerror("class definition in method body");
class_nest++;
local_push();
$<num>$ = ruby_sourceline;
}
compstmt
kEND
{
$$ = NEW_CLASS($2, $5, $3);
nd_set_line($$, $<num>4);
local_pop();
class_nest--;
}
| kCLASS tLSHFT expr
{
$<num>$ = in_def;
in_def = 0;
}
term
{
$<num>$ = in_single;
in_single = 0;
class_nest++;
local_push();
}
compstmt
kEND
{
$$ = NEW_SCLASS($3, $7);
fixpos($$, $3);
local_pop();
class_nest--;
in_def = $<num>4;
in_single = $<num>6;
}
| kMODULE cname
{
if (in_def || in_single)
yyerror("module definition in method body");
class_nest++;
local_push();
$<num>$ = ruby_sourceline;
}
compstmt
kEND
{
$$ = NEW_MODULE($2, $4);
nd_set_line($$, $<num>3);
local_pop();
class_nest--;
}
| kDEF fname
{
if (in_def || in_single)
yyerror("nested method definition");
$<id>$ = cur_mid;
cur_mid = $2;
in_def++;
local_push();
}
f_arglist
compstmt
rescue
opt_else
ensure
kEND
{
if ($6) $5 = NEW_RESCUE($5, $6, $7);
else if ($7) {
rb_warn("else without rescue is useless");
$5 = block_append($5, $7);
}
if ($8) $5 = NEW_ENSURE($5, $8);
/* NOEX_PRIVATE for toplevel */
$$ = NEW_DEFN($2, $4, $5, class_nest?NOEX_PUBLIC:NOEX_PRIVATE);
if (is_attrset_id($2)) $$->nd_noex = NOEX_PUBLIC;
fixpos($$, $4);
local_pop();
in_def--;
cur_mid = $<id>3;
}
| kDEF singleton dot_or_colon {lex_state = EXPR_FNAME;} fname
{
value_expr($2);
in_single++;
local_push();
lex_state = EXPR_END; /* force for args */
}
f_arglist
compstmt
rescue
opt_else
ensure
kEND
{
if ($9) $8 = NEW_RESCUE($8, $9, $10);
else if ($10) {
rb_warn("else without rescue is useless");
$8 = block_append($8, $10);
}
if ($11) $8 = NEW_ENSURE($8, $11);
$$ = NEW_DEFS($2, $5, $7, $8);
fixpos($$, $2);
local_pop();
in_single--;
}
| kBREAK
{
$$ = NEW_BREAK();
}
| kNEXT
{
$$ = NEW_NEXT();
}
| kREDO
{
$$ = NEW_REDO();
}
| kRETRY
{
$$ = NEW_RETRY();
}
then : term
| kTHEN
| term kTHEN
do : term
| kDO_COND
if_tail : opt_else
| kELSIF expr then
compstmt
if_tail
{
value_expr($2);
$$ = NEW_IF(cond($2), $4, $5);
fixpos($$, $2);
}
opt_else : none
| kELSE compstmt
{
$$ = $2;
}
block_var : lhs
| mlhs
opt_block_var : none
| '|' /* none */ '|'
{
$$ = (NODE*)1;
}
| tOROP
{
$$ = (NODE*)1;
}
| '|' block_var '|'
{
$$ = $2;
}
do_block : kDO_BLOCK
{
$<vars>$ = dyna_push();
}
opt_block_var
compstmt
kEND
{
$$ = NEW_ITER($3, 0, $4);
fixpos($$, $3?$3:$4);
dyna_pop($<vars>2);
}
block_call : command do_block
{
if ($1 && nd_type($1) == NODE_BLOCK_PASS) {
rb_compile_error("both block arg and actual block given");
}
$2->nd_iter = $1;
$$ = $2;
fixpos($$, $2);
}
| block_call '.' operation2 opt_paren_args
{
value_expr($1);
$$ = new_call($1, $3, $4);
}
| block_call tCOLON2 operation2 opt_paren_args
{
value_expr($1);
$$ = new_call($1, $3, $4);
}
method_call : operation paren_args
{
$$ = new_fcall($1, $2);
fixpos($$, $2);
}
| primary '.' operation2 opt_paren_args
{
value_expr($1);
$$ = new_call($1, $3, $4);
fixpos($$, $1);
}
| primary tCOLON2 operation2 paren_args
{
value_expr($1);
$$ = new_call($1, $3, $4);
fixpos($$, $1);
}
| primary tCOLON2 operation3
{
value_expr($1);
$$ = new_call($1, $3, 0);
}
| kSUPER paren_args
{
if (!compile_for_eval && !in_def &&
!in_single && !in_defined)
yyerror("super called outside of method");
$$ = new_super($2);
}
| kSUPER
{
if (!compile_for_eval && !in_def &&
!in_single && !in_defined)
yyerror("super called outside of method");
$$ = NEW_ZSUPER();
}
brace_block : '{'
{
$<vars>$ = dyna_push();
}
opt_block_var
compstmt '}'
{
$$ = NEW_ITER($3, 0, $4);
fixpos($$, $4);
dyna_pop($<vars>2);
}
| kDO
{
$<vars>$ = dyna_push();
}
opt_block_var
compstmt kEND
{
$$ = NEW_ITER($3, 0, $4);
fixpos($$, $4);
dyna_pop($<vars>2);
}
case_body : kWHEN when_args then
compstmt
cases
{
$$ = NEW_WHEN($2, $4, $5);
}
when_args : args
| args ',' tSTAR arg
{
value_expr($4);
$$ = list_append($1, NEW_WHEN($4, 0, 0));
}
| tSTAR arg
{
value_expr($2);
$$ = NEW_LIST(NEW_WHEN($2, 0, 0));
}
cases : opt_else
| case_body
exc_list : none
| args
exc_var : tASSOC lhs
{
$$ = $2;
}
| none
rescue : kRESCUE exc_list exc_var then
compstmt
rescue
{
if ($3) {
$3 = node_assign($3, NEW_GVAR(rb_intern("$!")));
$5 = block_append($3, $5);
}
$$ = NEW_RESBODY($2, $5, $6);
fixpos($$, $2?$2:$5);
}
| none
ensure : none
| kENSURE compstmt
{
if ($2)
$$ = $2;
else
/* place holder */
$$ = NEW_NIL();
}
literal : numeric
| symbol
{
$$ = ID2SYM($1);
}
| tREGEXP
string : tSTRING
{
$$ = NEW_STR($1);
}
| tDSTRING
| string tSTRING
{
if (nd_type($1) == NODE_DSTR) {
list_append($1, NEW_STR($2));
}
else {
rb_str_concat($1->nd_lit, $2);
}
$$ = $1;
}
| string tDSTRING
{
if (nd_type($1) == NODE_STR) {
$$ = NEW_DSTR($1->nd_lit);
}
else {
$$ = $1;
}
$2->nd_head = NEW_STR($2->nd_lit);
nd_set_type($2, NODE_ARRAY);
list_concat($$, $2);
}
symbol : tSYMBEG sym
{
lex_state = EXPR_END;
$$ = $2;
}
sym : fname
| tIVAR
| tGVAR
| tCVAR
numeric : tINTEGER
| tFLOAT
variable : tIDENTIFIER
| tIVAR
| tGVAR
| tCONSTANT
| tCVAR
| kNIL {$$ = kNIL;}
| kSELF {$$ = kSELF;}
| kTRUE {$$ = kTRUE;}
| kFALSE {$$ = kFALSE;}
| k__FILE__ {$$ = k__FILE__;}
| k__LINE__ {$$ = k__LINE__;}
var_ref : variable
{
$$ = gettable($1);
}
backref : tNTH_REF
| tBACK_REF
superclass : term
{
$$ = 0;
}
| '<'
{
lex_state = EXPR_BEG;
}
expr term
{
$$ = $3;
}
| error term {yyerrok; $$ = 0;}
f_arglist : '(' f_args opt_nl ')'
{
$$ = $2;
lex_state = EXPR_BEG;
}
| f_args term
{
$$ = $1;
}
f_args : f_arg ',' f_optarg ',' f_rest_arg opt_f_block_arg
{
$$ = block_append(NEW_ARGS($1, $3, $5), $6);
}
| f_arg ',' f_optarg opt_f_block_arg
{
$$ = block_append(NEW_ARGS($1, $3, -1), $4);
}
| f_arg ',' f_rest_arg opt_f_block_arg
{
$$ = block_append(NEW_ARGS($1, 0, $3), $4);
}
| f_arg opt_f_block_arg
{
$$ = block_append(NEW_ARGS($1, 0, -1), $2);
}
| f_optarg ',' f_rest_arg opt_f_block_arg
{
$$ = block_append(NEW_ARGS(0, $1, $3), $4);
}
| f_optarg opt_f_block_arg
{
$$ = block_append(NEW_ARGS(0, $1, -1), $2);
}
| f_rest_arg opt_f_block_arg
{
$$ = block_append(NEW_ARGS(0, 0, $1), $2);
}
| f_block_arg
{
$$ = block_append(NEW_ARGS(0, 0, -1), $1);
}
| /* none */
{
$$ = NEW_ARGS(0, 0, -1);
}
f_norm_arg : tCONSTANT
{
yyerror("formal argument cannot be a constant");
}
| tIVAR
{
yyerror("formal argument cannot be an instance variable");
}
| tGVAR
{
yyerror("formal argument cannot be a global variable");
}
| tCVAR
{
yyerror("formal argument cannot be a class variable");
}
| tIDENTIFIER
{
if (!is_local_id($1))
yyerror("formal argument must be local variable");
else if (local_id($1))
yyerror("duplicate argument name");
local_cnt($1);
$$ = 1;
}
f_arg : f_norm_arg
| f_arg ',' f_norm_arg
{
$$ += 1;
}
f_opt : tIDENTIFIER '=' arg
{
if (!is_local_id($1))
yyerror("formal argument must be local variable");
else if (local_id($1))
yyerror("duplicate optional argument name");
$$ = assignable($1, $3);
}
f_optarg : f_opt
{
$$ = NEW_BLOCK($1);
$$->nd_end = $$;
}
| f_optarg ',' f_opt
{
$$ = block_append($1, $3);
}
f_rest_arg : tSTAR tIDENTIFIER
{
if (!is_local_id($2))
yyerror("rest argument must be local variable");
else if (local_id($2))
yyerror("duplicate rest argument name");
$$ = local_cnt($2);
}
| tSTAR
{
$$ = -2;
}
f_block_arg : tAMPER tIDENTIFIER
{
if (!is_local_id($2))
yyerror("block argument must be local variable");
else if (local_id($2))
yyerror("duplicate block argument name");
$$ = NEW_BLOCK_ARG($2);
}
opt_f_block_arg : ',' f_block_arg
{
$$ = $2;
}
| none
singleton : var_ref
{
if (nd_type($1) == NODE_SELF) {
$$ = NEW_SELF();
}
else {
$$ = $1;
}
}
| '(' {lex_state = EXPR_BEG;} expr opt_nl ')'
{
switch (nd_type($3)) {
case NODE_STR:
case NODE_DSTR:
case NODE_XSTR:
case NODE_DXSTR:
case NODE_DREGX:
case NODE_LIT:
case NODE_ARRAY:
case NODE_ZARRAY:
yyerror("can't define single method for literals.");
default:
break;
}
$$ = $3;
}
assoc_list : none
| assocs trailer
{
$$ = $1;
}
| args trailer
{
if ($1->nd_alen%2 != 0) {
yyerror("odd number list for Hash");
}
$$ = $1;
}
assocs : assoc
| assocs ',' assoc
{
$$ = list_concat($1, $3);
}
assoc : arg tASSOC arg
{
$$ = list_append(NEW_LIST($1), $3);
}
operation : tIDENTIFIER
| tCONSTANT
| tFID
operation2 : tIDENTIFIER
| tCONSTANT
| tFID
| op
operation3 : tIDENTIFIER
| tFID
| op
dot_or_colon : '.'
| tCOLON2
opt_terms : /* none */
| terms
opt_nl : /* none */
| '\n'
trailer : /* none */
| '\n'
| ','
term : ';' {yyerrok;}
| '\n'
terms : term
| terms ';' {yyerrok;}
none : /* none */
{
$$ = 0;
}
%%
#include <ctype.h>
#include <sys/types.h>
#include "regex.h"
#include "util.h"
/* We remove any previous definition of `SIGN_EXTEND_CHAR',
since ours (we hope) works properly with all combinations of
machines, compilers, `char' and `unsigned char' argument types.
(Per Bothner suggested the basic approach.) */
#undef SIGN_EXTEND_CHAR
#if __STDC__
# define SIGN_EXTEND_CHAR(c) ((signed char)(c))
#else /* not __STDC__ */
/* As in Harbison and Steele. */
# define SIGN_EXTEND_CHAR(c) ((((unsigned char)(c)) ^ 128) - 128)
#endif
#define is_identchar(c) (SIGN_EXTEND_CHAR(c)!=-1&&(ISALNUM(c) || (c) == '_' || ismbchar(c)))
static char *tokenbuf = NULL;
static int tokidx, toksiz = 0;
static NODE *str_extend _((NODE*,int,int));
#define LEAVE_BS 1
static VALUE (*lex_gets)(); /* gets function */
static VALUE lex_input; /* non-nil if File */
static VALUE lex_lastline; /* gc protect */
static char *lex_pbeg;
static char *lex_p;
static char *lex_pend;
static int
yyerror(msg)
char *msg;
{
char *p, *pe, *buf;
int len, i;
rb_compile_error("%s", msg);
p = lex_p;
while (lex_pbeg <= p) {
if (*p == '\n') break;
p--;
}
p++;
pe = lex_p;
while (pe < lex_pend) {
if (*pe == '\n') break;
pe++;
}
len = pe - p;
if (len > 4) {
buf = ALLOCA_N(char, len+2);
MEMCPY(buf, p, char, len);
buf[len] = '\0';
rb_compile_error_append("%s", buf);
i = lex_p - p;
p = buf; pe = p + len;
while (p < pe) {
if (*p != '\t') *p = ' ';
p++;
}
buf[i] = '^';
buf[i+1] = '\0';
rb_compile_error_append("%s", buf);
}
return 0;
}
static int heredoc_end;
int ruby_in_compile = 0;
int ruby__end__seen;
static VALUE ruby_debug_lines;
static NODE*
yycompile(f, line)
char *f;
int line;
{
int n;
NODE *node = 0;
if (!compile_for_eval && rb_safe_level() == 0 &&
rb_const_defined(rb_cObject, rb_intern("SCRIPT_LINES__"))) {
VALUE hash, fname;
hash = rb_const_get(rb_cObject, rb_intern("SCRIPT_LINES__"));
if (TYPE(hash) == T_HASH) {
fname = rb_str_new2(f);
ruby_debug_lines = rb_hash_aref(hash, fname);
if (NIL_P(ruby_debug_lines)) {
ruby_debug_lines = rb_ary_new();
rb_hash_aset(hash, fname, ruby_debug_lines);
}
}
if (line > 1) {
VALUE str = rb_str_new(0,0);
while (line > 1) {
rb_ary_push(ruby_debug_lines, str);
line--;
}
}
}
ruby__end__seen = 0;
ruby_eval_tree = 0;
heredoc_end = 0;
ruby_sourcefile = strdup(f);
ruby_in_compile = 1;
n = yyparse();
ruby_debug_lines = 0;
compile_for_eval = 0;
ruby_in_compile = 0;
cond_nest = 0;
cond_stack = 0;
cmdarg_stack = 0;
class_nest = 0;
in_single = 0;
in_def = 0;
cur_mid = 0;
if (n == 0) node = ruby_eval_tree;
return node;
}
static int lex_gets_ptr;
static VALUE
lex_get_str(s)
VALUE s;
{
char *beg, *end, *pend;
beg = RSTRING(s)->ptr;
if (lex_gets_ptr) {
if (RSTRING(s)->len == lex_gets_ptr) return Qnil;
beg += lex_gets_ptr;
}
pend = RSTRING(s)->ptr + RSTRING(s)->len;
end = beg;
while (end < pend) {
if (*end++ == '\n') break;
}
lex_gets_ptr = end - RSTRING(s)->ptr;
return rb_str_new(beg, end - beg);
}
static VALUE
lex_getline()
{
VALUE line = (*lex_gets)(lex_input);
if (ruby_debug_lines && !NIL_P(line)) {
rb_ary_push(ruby_debug_lines, line);
}
return line;
}
NODE*
rb_compile_string(f, s, line)
const char *f;
VALUE s;
int line;
{
lex_gets = lex_get_str;
lex_gets_ptr = 0;
lex_input = s;
lex_pbeg = lex_p = lex_pend = 0;
ruby_sourceline = line - 1;
compile_for_eval = ruby_in_eval;
return yycompile(f, line);
}
NODE*
rb_compile_cstr(f, s, len, line)
const char *f, *s;
int len, line;
{
return rb_compile_string(f, rb_str_new(s, len), line);
}
NODE*
rb_compile_file(f, file, start)
const char *f;
VALUE file;
int start;
{
lex_gets = rb_io_gets;
lex_input = file;
lex_pbeg = lex_p = lex_pend = 0;
ruby_sourceline = start - 1;
return yycompile(f, start);
}
static inline int
nextc()
{
int c;
if (lex_p == lex_pend) {
if (lex_input) {
VALUE v = lex_getline();
if (NIL_P(v)) return -1;
if (heredoc_end > 0) {
ruby_sourceline = heredoc_end;
heredoc_end = 0;
}
ruby_sourceline++;
lex_pbeg = lex_p = RSTRING(v)->ptr;
lex_pend = lex_p + RSTRING(v)->len;
if (strncmp(lex_pbeg, "__END__", 7) == 0 &&
(RSTRING(v)->len == 7 || lex_pbeg[7] == '\n' || lex_pbeg[7] == '\r')) {
ruby__end__seen = 1;
lex_lastline = 0;
return -1;
}
lex_lastline = v;
}
else {
lex_lastline = 0;
return -1;
}
}
c = (unsigned char)*lex_p++;
if (c == '\r' && lex_p <= lex_pend && *lex_p == '\n') {
lex_p++;
c = '\n';
}
return c;
}
static void
pushback(c)
int c;
{
if (c == -1) return;
lex_p--;
}
#define peek(c) (lex_p != lex_pend && (c) == *lex_p)
#define tokfix() (tokenbuf[tokidx]='\0')
#define tok() tokenbuf
#define toklen() tokidx
#define toklast() (tokidx>0?tokenbuf[tokidx-1]:0)
static char*
newtok()
{
tokidx = 0;
if (!tokenbuf) {
toksiz = 60;
tokenbuf = ALLOC_N(char, 60);
}
if (toksiz > 4096) {
toksiz = 60;
REALLOC_N(tokenbuf, char, 60);
}
return tokenbuf;
}
static void
tokadd(c)
char c;
{
tokenbuf[tokidx++] = c;
if (tokidx >= toksiz) {
toksiz *= 2;
REALLOC_N(tokenbuf, char, toksiz);
}
}
static int
read_escape()
{
int c;
switch (c = nextc()) {
case '\\': /* Backslash */
return c;
case 'n': /* newline */
return '\n';
case 't': /* horizontal tab */
return '\t';
case 'r': /* carriage-return */
return '\r';
case 'f': /* form-feed */
return '\f';
case 'v': /* vertical tab */
return '\13';
case 'a': /* alarm(bell) */
return '\007';
case 'e': /* escape */
return 033;
case '0': case '1': case '2': case '3': /* octal constant */
case '4': case '5': case '6': case '7':
{
char buf[3];
int i;
pushback(c);
for (i=0; i<3; i++) {
c = nextc();
if (c == -1) goto eof;
if (c < '0' || '7' < c) {
pushback(c);
break;
}
buf[i] = c;
}
c = scan_oct(buf, i, &i);
}
return c;
case 'x': /* hex constant */
{
int numlen;
c = scan_hex(lex_p, 2, &numlen);
lex_p += numlen;
}
return c;
case 'b': /* backspace */
return '\010';
case 's': /* space */
return ' ';
case 'M':
if ((c = nextc()) != '-') {
yyerror("Invalid escape character syntax");
pushback(c);
return '\0';
}
if ((c = nextc()) == '\\') {
return read_escape() | 0x80;
}
else if (c == -1) goto eof;
else {
return ((c & 0xff) | 0x80);
}
case 'C':
if ((c = nextc()) != '-') {
yyerror("Invalid escape character syntax");
pushback(c);
return '\0';
}
case 'c':
if ((c = nextc())== '\\') {
c = read_escape();
}
else if (c == '?')
return 0177;
else if (c == -1) goto eof;
return c & 0x9f;
eof:
case -1:
yyerror("Invalid escape character syntax");
return '\0';
default:
return c;
}
}
static int
tokadd_escape(term)
int term;
{
int c;
switch (c = nextc()) {
case '\n':
return 0; /* just ignore */
case '0': case '1': case '2': case '3': /* octal constant */
case '4': case '5': case '6': case '7':
{
int i;
tokadd('\\');
tokadd(c);
for (i=0; i<2; i++) {
c = nextc();
if (c == -1) goto eof;
if (c < '0' || '7' < c) {
pushback(c);
break;
}
tokadd(c);
}
}
return 0;
case 'x': /* hex constant */
{
int numlen;
tokadd('\\');
tokadd(c);
scan_hex(lex_p, 2, &numlen);
while (numlen--)
tokadd(nextc());
}
return 0;
case 'M':
if ((c = nextc()) != '-') {
yyerror("Invalid escape character syntax");
pushback(c);
return 0;
}
tokadd('\\'); tokadd('M'); tokadd('-');
goto escaped;
case 'C':
if ((c = nextc()) != '-') {
yyerror("Invalid escape character syntax");
pushback(c);
return 0;
}
tokadd('\\'); tokadd('C'); tokadd('-');
goto escaped;
case 'c':
tokadd('\\'); tokadd('c');
escaped:
if ((c = nextc()) == '\\') {
return tokadd_escape(term);
}
else if (c == -1) goto eof;
tokadd(c);
return 0;
eof:
case -1:
yyerror("Invalid escape character syntax");
return -1;
default:
if (c != term)
tokadd('\\');
tokadd(c);
}
return 0;
}
static int
parse_regx(term, paren)
int term, paren;
{
register int c;
char kcode = 0;
int once = 0;
int nest = 0;
int options = 0;
int re_start = ruby_sourceline;
NODE *list = 0;
newtok();
while ((c = nextc()) != -1) {
if (c == term && nest == 0) {
goto regx_end;
}
switch (c) {
case '#':
list = str_extend(list, term, paren);
if (list == (NODE*)-1) goto unterminated;
continue;
case '\\':
if (tokadd_escape(term) < 0)
return 0;
continue;
case -1:
goto unterminated;
default:
if (paren) {
if (c == paren) nest++;
if (c == term) nest--;
}
if (ismbchar(c)) {
int i, len = mbclen(c)-1;
for (i = 0; i < len; i++) {
tokadd(c);
c = nextc();
}
}
break;
regx_end:
for (;;) {
switch (c = nextc()) {
case 'i':
options |= RE_OPTION_IGNORECASE;
break;
case 'x':
options |= RE_OPTION_EXTENDED;
break;
case 'p': /* /p is obsolete */
rb_warn("/p option is obsolete; use /m\n\tnote: /m does not change ^, $ behavior");
options |= RE_OPTION_POSIXLINE;
break;
case 'm':
options |= RE_OPTION_MULTILINE;
break;
case 'o':
once = 1;
break;
case 'n':
kcode = 16;
break;
case 'e':
kcode = 32;
break;
case 's':
kcode = 48;
break;
case 'u':
kcode = 64;
break;
default:
pushback(c);
goto end_options;
}
}
end_options:
tokfix();
lex_state = EXPR_END;
if (list) {
nd_set_line(list, re_start);
if (toklen() > 0) {
VALUE ss = rb_str_new(tok(), toklen());
list_append(list, NEW_STR(ss));
}
nd_set_type(list, once?NODE_DREGX_ONCE:NODE_DREGX);
list->nd_cflag = options | kcode;
yylval.node = list;
return tDREGEXP;
}
else {
yylval.val = rb_reg_new(tok(), toklen(), options | kcode);
return tREGEXP;
}
}
tokadd(c);
}
unterminated:
ruby_sourceline = re_start;
rb_compile_error("unterminated regexp meets end of file");
return 0;
}
static int parse_qstring _((int,int));
static int
parse_string(func, term, paren)
int func, term, paren;
{
int c;
NODE *list = 0;
int strstart;
int nest = 0;
if (func == '\'') {
return parse_qstring(term, paren);
}
if (func == 0) { /* read 1 line for heredoc */
/* -1 for chomp */
yylval.val = rb_str_new(lex_pbeg, lex_pend - lex_pbeg - 1);
lex_p = lex_pend;
return tSTRING;
}
strstart = ruby_sourceline;
newtok();
while ((c = nextc()) != term || nest > 0) {
if (c == -1) {
unterm_str:
ruby_sourceline = strstart;
rb_compile_error("unterminated string meets end of file");
return 0;
}
if (ismbchar(c)) {
int i, len = mbclen(c)-1;
for (i = 0; i < len; i++) {
tokadd(c);
c = nextc();
}
}
else if (c == '#') {
list = str_extend(list, term, paren);
if (list == (NODE*)-1) goto unterm_str;
continue;
}
else if (c == '\\') {
c = nextc();
if (c == '\n')
continue;
if (c == term) {
tokadd(c);
}
else {
pushback(c);
if (func != '"') tokadd('\\');
tokadd(read_escape());
}
continue;
}
if (paren) {
if (c == paren) nest++;
if (c == term && nest-- == 0) break;
}
tokadd(c);
}
tokfix();
lex_state = EXPR_END;
if (list) {
nd_set_line(list, strstart);
if (toklen() > 0) {
VALUE ss = rb_str_new(tok(), toklen());
list_append(list, NEW_STR(ss));
}
yylval.node = list;
if (func == '`') {
nd_set_type(list, NODE_DXSTR);
return tDXSTRING;
}
else {
return tDSTRING;
}
}
else {
yylval.val = rb_str_new(tok(), toklen());
return (func == '`') ? tXSTRING : tSTRING;
}
}
static int
parse_qstring(term, paren)
int term, paren;
{
int strstart;
int c;
int nest = 0;
strstart = ruby_sourceline;
newtok();
while ((c = nextc()) != term || nest > 0) {
if (c == -1) {
ruby_sourceline = strstart;
rb_compile_error("unterminated string meets end of file");
return 0;
}
if (ismbchar(c)) {
int i, len = mbclen(c)-1;
for (i = 0; i < len; i++) {
tokadd(c);
c = nextc();
}
}
else if (c == '\\') {
c = nextc();
switch (c) {
case '\n':
continue;
case '\\':
c = '\\';
break;
default:
/* fall through */
if (c == term || (paren && c == paren)) {
tokadd(c);
continue;
}
tokadd('\\');
}
}
if (paren) {
if (c == paren) nest++;
if (c == term && nest-- == 0) break;
}
tokadd(c);
}
tokfix();
yylval.val = rb_str_new(tok(), toklen());
lex_state = EXPR_END;
return tSTRING;
}
static int
parse_quotedwords(term, paren)
int term, paren;
{
NODE *qwords = 0;
int strstart;
int c;
int nest = 0;
strstart = ruby_sourceline;
newtok();
while (c = nextc(),ISSPACE(c))
; /* skip preceding spaces */
pushback(c);
while ((c = nextc()) != term || nest > 0) {
if (c == -1) {
ruby_sourceline = strstart;
rb_compile_error("unterminated string meets end of file");
return 0;
}
if (ismbchar(c)) {
int i, len = mbclen(c)-1;
for (i = 0; i < len; i++) {
tokadd(c);
c = nextc();
}
}
else if (c == '\\') {
c = nextc();
switch (c) {
case '\n':
continue;
case '\\':
c = '\\';
break;
default:
if (c == term || (paren && c == paren)) {
tokadd(c);
continue;
}
if (!ISSPACE(c))
tokadd('\\');
break;
}
}
else if (ISSPACE(c)) {
NODE *str;
tokfix();
str = NEW_STR(rb_str_new(tok(), toklen()));
newtok();
if (!qwords) qwords = NEW_LIST(str);
else list_append(qwords, str);
while (c = nextc(),ISSPACE(c))
; /* skip continuous spaces */
pushback(c);
continue;
}
if (paren) {
if (c == paren) nest++;
if (c == term && nest-- == 0) break;
}
tokadd(c);
}
tokfix();
if (toklen() > 0) {
NODE *str;
str = NEW_STR(rb_str_new(tok(), toklen()));
if (!qwords) qwords = NEW_LIST(str);
else list_append(qwords, str);
}
if (!qwords) qwords = NEW_ZARRAY();
yylval.node = qwords;
lex_state = EXPR_END;
return tQWORDS;
}
static int
here_document(term, indent)
char term;
int indent;
{
int c;
char *eos, *p;
int len;
VALUE str;
volatile VALUE line = 0;
VALUE lastline_save;
int offset_save;
NODE *list = 0;
int linesave = ruby_sourceline;
newtok();
switch (term) {
case '\'':
case '"':
case '`':
while ((c = nextc()) != term) {
tokadd(c);
}
if (term == '\'') term = 0;
break;
default:
c = term;
term = '"';
if (!is_identchar(c)) {
rb_warn("use of bare << to mean <<\"\" is deprecated");
break;
}
while (is_identchar(c)) {
tokadd(c);
c = nextc();
}
pushback(c);
break;
}
tokfix();
lastline_save = lex_lastline;
offset_save = lex_p - lex_pbeg;
eos = strdup(tok());
len = strlen(eos);
str = rb_str_new(0,0);
for (;;) {
lex_lastline = line = lex_getline();
if (NIL_P(line)) {
error:
ruby_sourceline = linesave;
rb_compile_error("can't find string \"%s\" anywhere before EOF", eos);
free(eos);
return 0;
}
ruby_sourceline++;
p = RSTRING(line)->ptr;
if (indent) {
while (*p && (*p == ' ' || *p == '\t')) {
p++;
}
}
if (strncmp(eos, p, len) == 0) {
if (p[len] == '\n' || p[len] == '\r')
break;
if (len == RSTRING(line)->len)
break;
}
lex_pbeg = lex_p = RSTRING(line)->ptr;
lex_pend = lex_p + RSTRING(line)->len;
#if 0
if (indent) {
while (*lex_p && *lex_p == '\t') {
lex_p++;
}
}
#endif
retry:
switch (parse_string(term, '\n', '\n')) {
case tSTRING:
case tXSTRING:
rb_str_cat2(yylval.val, "\n");
if (!list) {
rb_str_append(str, yylval.val);
}
else {
list_append(list, NEW_STR(yylval.val));
}
break;
case tDSTRING:
if (!list) list = NEW_DSTR(str);
/* fall through */
case tDXSTRING:
if (!list) list = NEW_DXSTR(str);
list_append(yylval.node, NEW_STR(rb_str_new2("\n")));
nd_set_type(yylval.node, NODE_STR);
yylval.node = NEW_LIST(yylval.node);
yylval.node->nd_next = yylval.node->nd_head->nd_next;
list_concat(list, yylval.node);
break;
case 0:
goto error;
}
if (lex_p != lex_pend) {
goto retry;
}
}
free(eos);
lex_lastline = lastline_save;
lex_pbeg = RSTRING(lex_lastline)->ptr;
lex_pend = lex_pbeg + RSTRING(lex_lastline)->len;
lex_p = lex_pbeg + offset_save;
lex_state = EXPR_END;
heredoc_end = ruby_sourceline;
ruby_sourceline = linesave;
if (list) {
nd_set_line(list, linesave+1);
yylval.node = list;
}
switch (term) {
case '\0':
case '\'':
case '"':
if (list) return tDSTRING;
yylval.val = str;
return tSTRING;
case '`':
if (list) return tDXSTRING;
yylval.val = str;
return tXSTRING;
}
return 0;
}
#include "lex.c"
static void
arg_ambiguous()
{
rb_warning("ambiguous first argument; make sure");
}
#if !defined(strtod) && !defined(HAVE_STDLIB_H)
double strtod ();
#endif
static int
yylex()
{
register int c;
int space_seen = 0;
struct kwtable *kw;
retry:
switch (c = nextc()) {
case '\0': /* NUL */
case '\004': /* ^D */
case '\032': /* ^Z */
case -1: /* end of script. */
return 0;
/* white spaces */
case ' ': case '\t': case '\f': case '\r':
case '\13': /* '\v' */
space_seen++;
goto retry;
case '#': /* it's a comment */
while ((c = nextc()) != '\n') {
if (c == -1)
return 0;
}
/* fall through */
case '\n':
switch (lex_state) {
case EXPR_BEG:
case EXPR_FNAME:
case EXPR_DOT:
goto retry;
default:
break;
}
lex_state = EXPR_BEG;
return '\n';
case '*':
if ((c = nextc()) == '*') {
if (nextc() == '=') {
lex_state = EXPR_BEG;
yylval.id = tPOW;
return tOP_ASGN;
}
pushback(c);
c = tPOW;
}
else {
if (c == '=') {
yylval.id = '*';
lex_state = EXPR_BEG;
return tOP_ASGN;
}
pushback(c);
if (lex_state == EXPR_ARG && space_seen && !ISSPACE(c)){
rb_warning("`*' interpreted as argument prefix");
c = tSTAR;
}
else if (lex_state == EXPR_BEG || lex_state == EXPR_MID) {
c = tSTAR;
}
else {
c = '*';
}
}
switch (lex_state) {
case EXPR_FNAME: case EXPR_DOT:
lex_state = EXPR_ARG; break;
default:
lex_state = EXPR_BEG; break;
}
return c;
case '!':
lex_state = EXPR_BEG;
if ((c = nextc()) == '=') {
return tNEQ;
}
if (c == '~') {
return tNMATCH;
}
pushback(c);
return '!';
case '=':
if (lex_p == lex_pbeg + 1) {
/* skip embedded rd document */
if (strncmp(lex_p, "begin", 5) == 0 && ISSPACE(lex_p[5])) {
for (;;) {
lex_p = lex_pend;
c = nextc();
if (c == -1) {
rb_compile_error("embedded document meets end of file");
return 0;
}
if (c != '=') continue;
if (strncmp(lex_p, "end", 3) == 0 &&
(lex_p + 3 == lex_pend || ISSPACE(lex_p[3]))) {
break;
}
}
lex_p = lex_pend;
goto retry;
}
}
switch (lex_state) {
case EXPR_FNAME: case EXPR_DOT:
lex_state = EXPR_ARG; break;
default:
lex_state = EXPR_BEG; break;
}
if ((c = nextc()) == '=') {
if ((c = nextc()) == '=') {
return tEQQ;
}
pushback(c);
return tEQ;
}
if (c == '~') {
return tMATCH;
}
else if (c == '>') {
return tASSOC;
}
pushback(c);
return '=';
case '<':
c = nextc();
if (c == '<' &&
lex_state != EXPR_END && lex_state != EXPR_CLASS &&
(lex_state != EXPR_ARG || space_seen)) {
int c2 = nextc();
int indent = 0;
if (c2 == '-') {
indent = 1;
c2 = nextc();
}
if (!ISSPACE(c2) && (strchr("\"'`", c2) || is_identchar(c2))) {
return here_document(c2, indent);
}
pushback(c2);
}
switch (lex_state) {
case EXPR_FNAME: case EXPR_DOT:
lex_state = EXPR_ARG; break;
default:
lex_state = EXPR_BEG; break;
}
if (c == '=') {
if ((c = nextc()) == '>') {
return tCMP;
}
pushback(c);
return tLEQ;
}
if (c == '<') {
if (nextc() == '=') {
lex_state = EXPR_BEG;
yylval.id = tLSHFT;
return tOP_ASGN;
}
pushback(c);
return tLSHFT;
}
pushback(c);
return '<';
case '>':
switch (lex_state) {
case EXPR_FNAME: case EXPR_DOT:
lex_state = EXPR_ARG; break;
default:
lex_state = EXPR_BEG; break;
}
if ((c = nextc()) == '=') {
return tGEQ;
}
if (c == '>') {
if ((c = nextc()) == '=') {
lex_state = EXPR_BEG;
yylval.id = tRSHFT;
return tOP_ASGN;
}
pushback(c);
return tRSHFT;
}
pushback(c);
return '>';
case '"':
return parse_string(c,c,c);
case '`':
if (lex_state == EXPR_FNAME) return c;
if (lex_state == EXPR_DOT) return c;
return parse_string(c,c,c);
case '\'':
return parse_qstring(c,0);
case '?':
if (lex_state == EXPR_END) {
lex_state = EXPR_BEG;
return '?';
}
c = nextc();
if (c == -1) {
rb_compile_error("incomplete character syntax");
return 0;
}
if (lex_state == EXPR_ARG && ISSPACE(c)){
pushback(c);
lex_state = EXPR_BEG;
return '?';
}
if (c == '\\') {
c = read_escape();
}
c &= 0xff;
yylval.val = INT2FIX(c);
lex_state = EXPR_END;
return tINTEGER;
case '&':
if ((c = nextc()) == '&') {
lex_state = EXPR_BEG;
if ((c = nextc()) == '=') {
yylval.id = tANDOP;
return tOP_ASGN;
}
pushback(c);
return tANDOP;
}
else if (c == '=') {
yylval.id = '&';
lex_state = EXPR_BEG;
return tOP_ASGN;
}
pushback(c);
if (lex_state == EXPR_ARG && space_seen && !ISSPACE(c)){
rb_warning("`&' interpreted as argument prefix");
c = tAMPER;
}
else if (lex_state == EXPR_BEG || lex_state == EXPR_MID) {
c = tAMPER;
}
else {
c = '&';
}
switch (lex_state) {
case EXPR_FNAME: case EXPR_DOT:
lex_state = EXPR_ARG; break;
default:
lex_state = EXPR_BEG;
}
return c;
case '|':
if ((c = nextc()) == '|') {
lex_state = EXPR_BEG;
if ((c = nextc()) == '=') {
yylval.id = tOROP;
return tOP_ASGN;
}
pushback(c);
return tOROP;
}
if (c == '=') {
lex_state = EXPR_BEG;
yylval.id = '|';
return tOP_ASGN;
}
if (lex_state == EXPR_FNAME || lex_state == EXPR_DOT) {
lex_state = EXPR_ARG;
}
else {
lex_state = EXPR_BEG;
}
pushback(c);
return '|';
case '+':
c = nextc();
if (lex_state == EXPR_FNAME || lex_state == EXPR_DOT) {
lex_state = EXPR_ARG;
if (c == '@') {
return tUPLUS;
}
pushback(c);
return '+';
}
if (c == '=') {
lex_state = EXPR_BEG;
yylval.id = '+';
return tOP_ASGN;
}
if (lex_state == EXPR_BEG || lex_state == EXPR_MID ||
(lex_state == EXPR_ARG && space_seen && !ISSPACE(c))) {
if (lex_state == EXPR_ARG) arg_ambiguous();
lex_state = EXPR_BEG;
pushback(c);
if (ISDIGIT(c)) {
c = '+';
goto start_num;
}
return tUPLUS;
}
lex_state = EXPR_BEG;
pushback(c);
return '+';
case '-':
c = nextc();
if (lex_state == EXPR_FNAME || lex_state == EXPR_DOT) {
lex_state = EXPR_ARG;
if (c == '@') {
return tUMINUS;
}
pushback(c);
return '-';
}
if (c == '=') {
lex_state = EXPR_BEG;
yylval.id = '-';
return tOP_ASGN;
}
if (lex_state == EXPR_BEG || lex_state == EXPR_MID ||
(lex_state == EXPR_ARG && space_seen && !ISSPACE(c))) {
if (lex_state == EXPR_ARG) arg_ambiguous();
lex_state = EXPR_BEG;
pushback(c);
if (ISDIGIT(c)) {
c = '-';
goto start_num;
}
return tUMINUS;
}
lex_state = EXPR_BEG;
pushback(c);
return '-';
case '.':
lex_state = EXPR_BEG;
if ((c = nextc()) == '.') {
if ((c = nextc()) == '.') {
return tDOT3;
}
pushback(c);
return tDOT2;
}
pushback(c);
if (!ISDIGIT(c)) {
lex_state = EXPR_DOT;
return '.';
}
c = '.';
/* fall through */
start_num:
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
{
int is_float, seen_point, seen_e, nondigit;
is_float = seen_point = seen_e = nondigit = 0;
lex_state = EXPR_END;
newtok();
if (c == '-' || c == '+') {
tokadd(c);
c = nextc();
}
if (c == '0') {
int start = toklen();
c = nextc();
if (c == 'x' || c == 'X') {
/* hexadecimal */
c = nextc();
if (ISXDIGIT(c)) {
do {
if (c == '_') {
if (nondigit) break;
nondigit = c;
continue;
}
if (!ISXDIGIT(c)) break;
nondigit = 0;
tokadd(c);
} while (c = nextc());
}
pushback(c);
tokfix();
if (toklen() == start) {
yyerror("hexadecimal number without hex-digits");
}
else if (nondigit) goto trailing_uc;
yylval.val = rb_cstr2inum(tok(), 16);
return tINTEGER;
}
if (c == 'b' || c == 'B') {
/* binary */
c = nextc();
if (c == '0' || c == '1') {
do {
if (c == '_') {
if (nondigit) break;
nondigit = c;
continue;
}
if (c != '0' && c != '1') break;
nondigit = 0;
tokadd(c);
} while (c = nextc());
}
pushback(c);
tokfix();
if (toklen() == start) {
yyerror("numeric literal without digits");
}
else if (nondigit) goto trailing_uc;
yylval.val = rb_cstr2inum(tok(), 2);
return tINTEGER;
}
if (c >= '0' && c <= '7' || c == '_') {
/* octal */
do {
if (c == '_') {
if (nondigit) break;
nondigit = c;
continue;
}
if (c < '0' || c > '7') break;
nondigit = 0;
tokadd(c);
} while (c = nextc());
if (toklen() > start) {
pushback(c);
tokfix();
if (nondigit) goto trailing_uc;
yylval.val = rb_cstr2inum(tok(), 8);
return tINTEGER;
}
}
if (c > '7' && c <= '9') {
yyerror("Illegal octal digit");
}
else if (c == '.' || c == 'e' || c == 'E') {
tokadd('0');
}
else {
pushback(c);
yylval.val = INT2FIX(0);
return tINTEGER;
}
}
for (;;) {
switch (c) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
nondigit = 0;
tokadd(c);
break;
case '.':
if (nondigit) goto trailing_uc;
if (seen_point || seen_e) {
goto decode_num;
}
else {
int c0 = nextc();
if (!ISDIGIT(c0)) {
pushback(c0);
goto decode_num;
}
c = c0;
}
tokadd('.');
tokadd(c);
is_float++;
seen_point++;
nondigit = 0;
break;
case 'e':
case 'E':
if (nondigit) {
pushback(c);
c = nondigit;
goto decode_num;
}
if (seen_e) {
goto decode_num;
}
tokadd(c);
seen_e++;
is_float++;
nondigit = c;
c = nextc();
if (c != '-' && c != '+') continue;
tokadd(c);
nondigit = c;
break;
case '_': /* `_' in number just ignored */
if (nondigit) goto decode_num;
nondigit = c;
break;
default:
goto decode_num;
}
c = nextc();
}
decode_num:
pushback(c);
tokfix();
if (nondigit) {
char tmp[30];
trailing_uc:
sprintf(tmp, "trailing `%c' in number", nondigit);
yyerror(tmp);
}
if (is_float) {
double d = strtod(tok(), 0);
if (errno == ERANGE) {
rb_warn("Float %s out of range", tok());
errno = 0;
}
yylval.val = rb_float_new(d);
return tFLOAT;
}
yylval.val = rb_cstr2inum(tok(), 10);
return tINTEGER;
}
case ']':
case '}':
lex_state = EXPR_END;
return c;
case ')':
if (cond_nest > 0) {
cond_stack >>= 1;
}
lex_state = EXPR_END;
return c;
case ':':
c = nextc();
if (c == ':') {
if (lex_state == EXPR_BEG || lex_state == EXPR_MID ||
(lex_state == EXPR_ARG && space_seen)) {
lex_state = EXPR_BEG;
return tCOLON3;
}
lex_state = EXPR_DOT;
return tCOLON2;
}
pushback(c);
if (lex_state == EXPR_END || ISSPACE(c)) {
lex_state = EXPR_BEG;
return ':';
}
lex_state = EXPR_FNAME;
return tSYMBEG;
case '/':
if (lex_state == EXPR_BEG || lex_state == EXPR_MID) {
return parse_regx('/', '/');
}
if ((c = nextc()) == '=') {
lex_state = EXPR_BEG;
yylval.id = '/';
return tOP_ASGN;
}
pushback(c);
if (lex_state == EXPR_ARG && space_seen) {
if (!ISSPACE(c)) {
arg_ambiguous();
return parse_regx('/', '/');
}
}
switch (lex_state) {
case EXPR_FNAME: case EXPR_DOT:
lex_state = EXPR_ARG; break;
default:
lex_state = EXPR_BEG; break;
}
return '/';
case '^':
if ((c = nextc()) == '=') {
lex_state = EXPR_BEG;
yylval.id = '^';
return tOP_ASGN;
}
switch (lex_state) {
case EXPR_FNAME: case EXPR_DOT:
lex_state = EXPR_ARG; break;
default:
lex_state = EXPR_BEG; break;
}
pushback(c);
return '^';
case ',':
case ';':
lex_state = EXPR_BEG;
return c;
case '~':
if (lex_state == EXPR_FNAME || lex_state == EXPR_DOT) {
if ((c = nextc()) != '@') {
pushback(c);
}
}
switch (lex_state) {
case EXPR_FNAME: case EXPR_DOT:
lex_state = EXPR_ARG; break;
default:
lex_state = EXPR_BEG; break;
}
return '~';
case '(':
if (cond_nest > 0) {
cond_stack = (cond_stack<<1)|0;
}
if (lex_state == EXPR_BEG || lex_state == EXPR_MID) {
c = tLPAREN;
}
else if (lex_state == EXPR_ARG && space_seen) {
rb_warning("%s (...) interpreted as method call", tok());
}
lex_state = EXPR_BEG;
return c;
case '[':
if (lex_state == EXPR_FNAME || lex_state == EXPR_DOT) {
lex_state = EXPR_ARG;
if ((c = nextc()) == ']') {
if ((c = nextc()) == '=') {
return tASET;
}
pushback(c);
return tAREF;
}
pushback(c);
return '[';
}
else if (lex_state == EXPR_BEG || lex_state == EXPR_MID) {
c = tLBRACK;
}
else if (lex_state == EXPR_ARG && space_seen) {
c = tLBRACK;
}
lex_state = EXPR_BEG;
return c;
case '{':
if (lex_state != EXPR_END && lex_state != EXPR_ARG)
c = tLBRACE;
lex_state = EXPR_BEG;
return c;
case '\\':
c = nextc();
if (c == '\n') {
space_seen = 1;
goto retry; /* skip \\n */
}
pushback(c);
return '\\';
case '%':
if (lex_state == EXPR_BEG || lex_state == EXPR_MID) {
int term;
int paren;
c = nextc();
quotation:
if (!ISALNUM(c)) {
term = c;
c = 'Q';
}
else {
term = nextc();
if (ISALNUM(term) || ismbchar(term)) {
yyerror("unknown type of %string");
return 0;
}
}
if (c == -1 || term == -1) {
rb_compile_error("unterminated quoted string meets end of file");
return 0;
}
paren = term;
if (term == '(') term = ')';
else if (term == '[') term = ']';
else if (term == '{') term = '}';
else if (term == '<') term = '>';
else paren = 0;
switch (c) {
case 'Q':
return parse_string('"', term, paren);
case 'q':
return parse_qstring(term, paren);
case 'w':
return parse_quotedwords(term, paren);
case 'x':
return parse_string('`', term, paren);
case 'r':
return parse_regx(term, paren);
default:
yyerror("unknown type of %string");
return 0;
}
}
if ((c = nextc()) == '=') {
yylval.id = '%';
return tOP_ASGN;
}
if (lex_state == EXPR_ARG && space_seen && !ISSPACE(c)) {
goto quotation;
}
switch (lex_state) {
case EXPR_FNAME: case EXPR_DOT:
lex_state = EXPR_ARG; break;
default:
lex_state = EXPR_BEG; break;
}
pushback(c);
return '%';
case '$':
lex_state = EXPR_END;
newtok();
c = nextc();
switch (c) {
case '_': /* $_: last read line string */
c = nextc();
if (is_identchar(c)) {
tokadd('$');
tokadd('_');
break;
}
pushback(c);
c = '_';
/* fall through */
case '~': /* $~: match-data */
local_cnt(c);
/* fall through */
case '*': /* $*: argv */
case '$': /* $$: pid */
case '?': /* $?: last status */
case '!': /* $!: error string */
case '@': /* $@: error position */
case '/': /* $/: input record separator */
case '\\': /* $\: output record separator */
case ';': /* $;: field separator */
case ',': /* $,: output field separator */
case '.': /* $.: last read line number */
case '=': /* $=: ignorecase */
case ':': /* $:: load path */
case '<': /* $<: reading filename */
case '>': /* $>: default output handle */
case '\"': /* $": already loaded files */
tokadd('$');
tokadd(c);
tokfix();
yylval.id = rb_intern(tok());
return tGVAR;
case '-':
tokadd('$');
tokadd(c);
c = nextc();
tokadd(c);
tokfix();
yylval.id = rb_intern(tok());
/* xxx shouldn't check if valid option variable */
return tGVAR;
case '&': /* $&: last match */
case '`': /* $`: string before last match */
case '\'': /* $': string after last match */
case '+': /* $+: string matches last paren. */
yylval.node = NEW_BACK_REF(c);
return tBACK_REF;
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
tokadd('$');
while (ISDIGIT(c)) {
tokadd(c);
c = nextc();
}
if (is_identchar(c))
break;
pushback(c);
tokfix();
yylval.node = NEW_NTH_REF(atoi(tok()+1));
return tNTH_REF;
default:
if (!is_identchar(c)) {
pushback(c);
return '$';
}
case '0':
tokadd('$');
}
break;
case '@':
c = nextc();
newtok();
tokadd('@');
if (c == '@') {
tokadd('@');
c = nextc();
}
if (ISDIGIT(c)) {
rb_compile_error("`@%c' is not a valid instance variable name", c);
}
if (!is_identchar(c)) {
pushback(c);
return '@';
}
break;
default:
if (!is_identchar(c) || ISDIGIT(c)) {
rb_compile_error("Invalid char `\\%03o' in expression", c);
goto retry;
}
newtok();
break;
}
while (is_identchar(c)) {
tokadd(c);
if (ismbchar(c)) {
int i, len = mbclen(c)-1;
for (i = 0; i < len; i++) {
c = nextc();
tokadd(c);
}
}
c = nextc();
}
if ((c == '!' || c == '?') && is_identchar(tok()[0]) && !peek('=')) {
tokadd(c);
}
else {
pushback(c);
}
tokfix();
{
int result = 0;
switch (tok()[0]) {
case '$':
lex_state = EXPR_END;
result = tGVAR;
break;
case '@':
lex_state = EXPR_END;
if (tok()[1] == '@')
result = tCVAR;
else
result = tIVAR;
break;
default:
if (lex_state != EXPR_DOT) {
/* See if it is a reserved word. */
kw = rb_reserved_word(tok(), toklen());
if (kw) {
enum lex_state state = lex_state;
lex_state = kw->state;
if (state == EXPR_FNAME) {
yylval.id = rb_intern(kw->name);
}
if (kw->id[0] == kDO) {
if (COND_P()) return kDO_COND;
if (CMDARG_P()) return kDO_BLOCK;
return kDO;
}
if (state == EXPR_BEG)
return kw->id[0];
else {
if (kw->id[0] != kw->id[1])
lex_state = EXPR_BEG;
return kw->id[1];
}
}
}
if (toklast() == '!' || toklast() == '?') {
result = tFID;
}
else {
if (lex_state == EXPR_FNAME) {
#if 0
if ((c = nextc()) == '=' && !peek('=') && !peek('~') && !peek('>')) {
#else
if ((c = nextc()) == '=' && !peek('~') && !peek('>') &&
(!peek('=') || lex_p + 1 < lex_pend && lex_p[1] == '>')) {
#endif
result = tIDENTIFIER;
tokadd(c);
}
else {
pushback(c);
}
}
if (result == 0 && ISUPPER(tok()[0])) {
result = tCONSTANT;
}
else {
result = tIDENTIFIER;
}
}
if (lex_state == EXPR_BEG ||
lex_state == EXPR_DOT ||
lex_state == EXPR_ARG) {
lex_state = EXPR_ARG;
}
else {
lex_state = EXPR_END;
}
}
tokfix();
yylval.id = rb_intern(tok());
return result;
}
}
static NODE*
str_extend(list, term, paren)
NODE *list;
int term, paren;
{
int c;
int brace = -1;
VALUE ss;
NODE *node;
int brace_nest = 0;
int paren_nest = 0;
c = nextc();
switch (c) {
case '$':
case '@':
case '{':
break;
default:
tokadd('#');
pushback(c);
return list;
}
ss = rb_str_new(tok(), toklen());
if (list == 0) {
list = NEW_DSTR(ss);
}
else if (toklen() > 0) {
list_append(list, NEW_STR(ss));
}
newtok();
switch (c) {
case '$':
tokadd('$');
c = nextc();
if (c == -1) return (NODE*)-1;
switch (c) {
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
while (ISDIGIT(c)) {
tokadd(c);
c = nextc();
}
pushback(c);
goto fetch_id;
case '&': case '+':
case '_': case '~':
case '*': case '$': case '?':
case '!': case '@': case ',':
case '.': case '=': case ':':
case '<': case '>': case '\\':
case ';':
refetch:
tokadd(c);
goto fetch_id;
case '-':
tokadd(c);
c = nextc();
if (!is_identchar(c)) {
pushback();
goto invalid_interporate;
}
tokadd(c);
goto fetch_id;
default:
if (c == term) {
list_append(list, NEW_STR(rb_str_new2("#$")));
pushback(c);
newtok();
return list;
}
switch (c) {
case '\"':
case '/':
case '\'':
case '`':
goto refetch;
}
if (!is_identchar(c)) {
pushback(c);
invalid_interporate:
{
VALUE s = rb_str_new2("#");
rb_str_cat(s, tok(), toklen());
list_append(list, NEW_STR(s));
newtok();
return list;
}
}
}
while (is_identchar(c)) {
tokadd(c);
if (ismbchar(c)) {
int i, len = mbclen(c)-1;
for (i = 0; i < len; i++) {
c = nextc();
tokadd(c);
}
}
c = nextc();
}
pushback(c);
break;
case '@':
tokadd(c);
c = nextc();
if (c == '@') {
tokadd(c);
c = nextc();
}
while (is_identchar(c)) {
tokadd(c);
if (ismbchar(c)) {
int i, len = mbclen(c)-1;
for (i = 0; i < len; i++) {
c = nextc();
tokadd(c);
}
}
c = nextc();
}
pushback(c);
if (toklen() == 1) {
goto invalid_interporate;
}
break;
case '{':
if (c == '{') brace = '}';
brace_nest = 0;
do {
loop_again:
c = nextc();
switch (c) {
case -1:
if (brace_nest > 0) {
yyerror("bad substitution in string");
newtok();
return list;
}
return (NODE*)-1;
case '}':
if (c == brace) {
if (brace_nest == 0) break;
brace_nest--;
}
tokadd(c);
goto loop_again;
case '\\':
c = nextc();
if (c == -1) return (NODE*)-1;
if (c == term) {
tokadd(c);
}
else {
tokadd('\\');
tokadd(c);
}
goto loop_again;
case '{':
if (brace != -1) brace_nest++;
default:
if (c == paren) paren_nest++;
else if (c == term && (!paren || paren_nest-- == 0)) {
pushback(c);
list_append(list, NEW_STR(rb_str_new2("#")));
rb_warning("bad substitution in string");
tokfix();
list_append(list, NEW_STR(rb_str_new(tok(), toklen())));
newtok();
return list;
}
case '\n':
tokadd(c);
break;
}
} while (c != brace);
}
fetch_id:
tokfix();
node = NEW_EVSTR(tok(),toklen());
list_append(list, node);
newtok();
return list;
}
NODE*
rb_node_newnode(type, a0, a1, a2)
enum node_type type;
NODE *a0, *a1, *a2;
{
NODE *n = (NODE*)rb_newobj();
n->flags |= T_NODE;
nd_set_type(n, type);
nd_set_line(n, ruby_sourceline);
n->nd_file = ruby_sourcefile;
n->u1.node = a0;
n->u2.node = a1;
n->u3.node = a2;
return n;
}
static enum node_type
nodetype(node) /* for debug */
NODE *node;
{
return (enum node_type)nd_type(node);
}
static int
nodeline(node)
NODE *node;
{
return nd_line(node);
}
static NODE*
newline_node(node)
NODE *node;
{
NODE *nl = 0;
if (node) {
nl = NEW_NEWLINE(node);
fixpos(nl, node);
nl->nd_nth = nd_line(node);
}
return nl;
}
static void
fixpos(node, orig)
NODE *node, *orig;
{
if (!node) return;
if (!orig) return;
if (orig == (NODE*)1) return;
node->nd_file = orig->nd_file;
nd_set_line(node, nd_line(orig));
}
static NODE*
block_append(head, tail)
NODE *head, *tail;
{
NODE *end;
if (tail == 0) return head;
if (head == 0) return tail;
if (nd_type(head) != NODE_BLOCK) {
end = NEW_BLOCK(head);
end->nd_end = end;
fixpos(end, head);
head = end;
}
else {
end = head->nd_end;
}
if (RTEST(ruby_verbose)) {
NODE *nd = end->nd_head;
newline:
switch (nd_type(nd)) {
case NODE_RETURN:
case NODE_BREAK:
case NODE_NEXT:
case NODE_REDO:
case NODE_RETRY:
rb_warning("statement not reached");
break;
case NODE_NEWLINE:
nd = nd->nd_next;
goto newline;
default:
break;
}
}
if (nd_type(tail) != NODE_BLOCK) {
tail = NEW_BLOCK(tail);
tail->nd_end = tail;
}
end->nd_next = tail;
head->nd_end = tail->nd_end;
return head;
}
static NODE*
list_append(head, tail)
NODE *head, *tail;
{
NODE *last;
if (head == 0) return NEW_LIST(tail);
last = head;
while (last->nd_next) {
last = last->nd_next;
}
last->nd_next = NEW_LIST(tail);
head->nd_alen += 1;
return head;
}
static NODE*
list_concat(head, tail)
NODE *head, *tail;
{
NODE *last;
last = head;
while (last->nd_next) {
last = last->nd_next;
}
last->nd_next = tail;
head->nd_alen += tail->nd_alen;
return head;
}
static NODE *
call_op(recv, id, narg, arg1)
NODE *recv;
ID id;
int narg;
NODE *arg1;
{
value_expr(recv);
if (narg == 1) {
value_expr(arg1);
}
return NEW_CALL(recv, id, narg==1?NEW_LIST(arg1):0);
}
static NODE*
match_gen(node1, node2)
NODE *node1;
NODE *node2;
{
local_cnt('~');
switch (nd_type(node1)) {
case NODE_DREGX:
case NODE_DREGX_ONCE:
return NEW_MATCH2(node1, node2);
case NODE_LIT:
if (TYPE(node1->nd_lit) == T_REGEXP) {
return NEW_MATCH2(node1, node2);
}
}
switch (nd_type(node2)) {
case NODE_DREGX:
case NODE_DREGX_ONCE:
return NEW_MATCH3(node2, node1);
case NODE_LIT:
if (TYPE(node2->nd_lit) == T_REGEXP) {
return NEW_MATCH3(node2, node1);
}
}
return NEW_CALL(node1, tMATCH, NEW_LIST(node2));
}
static NODE*
gettable(id)
ID id;
{
if (id == kSELF) {
return NEW_SELF();
}
else if (id == kNIL) {
return NEW_NIL();
}
else if (id == kTRUE) {
return NEW_TRUE();
}
else if (id == kFALSE) {
return NEW_FALSE();
}
else if (id == k__FILE__) {
return NEW_STR(rb_str_new2(ruby_sourcefile));
}
else if (id == k__LINE__) {
return NEW_LIT(INT2FIX(ruby_sourceline));
}
else if (is_local_id(id)) {
if (dyna_in_block() && rb_dvar_defined(id)) return NEW_DVAR(id);
if (local_id(id)) return NEW_LVAR(id);
/* method call without arguments */
return NEW_VCALL(id);
}
else if (is_global_id(id)) {
return NEW_GVAR(id);
}
else if (is_instance_id(id)) {
return NEW_IVAR(id);
}
else if (is_const_id(id)) {
return NEW_CONST(id);
}
else if (is_class_id(id)) {
return NEW_CVAR(id);
}
rb_bug("invalid id for gettable");
return 0;
}
static NODE*
assignable(id, val)
ID id;
NODE *val;
{
value_expr(val);
if (id == kSELF) {
yyerror("Can't change the value of self");
}
else if (id == kNIL) {
yyerror("Can't assign to nil");
}
else if (id == kTRUE) {
yyerror("Can't assign to true");
}
else if (id == kFALSE) {
yyerror("Can't assign to false");
}
else if (id == k__FILE__) {
yyerror("Can't assign to __FILE__");
}
else if (id == k__LINE__) {
yyerror("Can't assign to __LINE__");
}
else if (is_local_id(id)) {
if (rb_dvar_curr(id)) {
return NEW_DASGN_CURR(id, val);
}
else if (rb_dvar_defined(id)) {
return NEW_DASGN(id, val);
}
else if (local_id(id) || !dyna_in_block()) {
return NEW_LASGN(id, val);
}
else{
rb_dvar_push(id, Qnil);
return NEW_DASGN_CURR(id, val);
}
}
else if (is_global_id(id)) {
return NEW_GASGN(id, val);
}
else if (is_instance_id(id)) {
return NEW_IASGN(id, val);
}
else if (is_const_id(id)) {
if (in_def || in_single)
yyerror("dynamic constant assignment");
return NEW_CDECL(id, val);
}
else if (is_class_id(id)) {
if (in_def || in_single) return NEW_CVASGN(id, val);
return NEW_CVDECL(id, val);
}
else {
rb_bug("bad id for variable");
}
return 0;
}
static NODE *
aryset(recv, idx)
NODE *recv, *idx;
{
value_expr(recv);
return NEW_CALL(recv, tASET, idx);
}
ID
rb_id_attrset(id)
ID id;
{
id &= ~ID_SCOPE_MASK;
id |= ID_ATTRSET;
return id;
}
static NODE *
attrset(recv, id)
NODE *recv;
ID id;
{
value_expr(recv);
return NEW_CALL(recv, rb_id_attrset(id), 0);
}
static void
rb_backref_error(node)
NODE *node;
{
switch (nd_type(node)) {
case NODE_NTH_REF:
rb_compile_error("Can't set variable $%d", node->nd_nth);
break;
case NODE_BACK_REF:
rb_compile_error("Can't set variable $%c", node->nd_nth);
break;
}
}
static NODE *
arg_concat(node1, node2)
NODE *node1;
NODE *node2;
{
if (!node2) return node1;
return NEW_ARGSCAT(node1, node2);
}
static NODE *
arg_add(node1, node2)
NODE *node1;
NODE *node2;
{
if (!node1) return NEW_LIST(node2);
if (nd_type(node1) == NODE_ARRAY) {
return list_append(node1, node2);
}
else {
return NEW_ARGSPUSH(node1, node2);
}
}
static NODE*
node_assign(lhs, rhs)
NODE *lhs, *rhs;
{
if (!lhs) return 0;
value_expr(rhs);
switch (nd_type(lhs)) {
case NODE_GASGN:
case NODE_IASGN:
case NODE_LASGN:
case NODE_DASGN:
case NODE_DASGN_CURR:
case NODE_MASGN:
case NODE_CDECL:
case NODE_CVDECL:
case NODE_CVASGN:
lhs->nd_value = rhs;
break;
case NODE_CALL:
lhs->nd_args = arg_add(lhs->nd_args, rhs);
break;
default:
/* should not happen */
break;
}
if (rhs) fixpos(lhs, rhs);
return lhs;
}
static int
value_expr(node)
NODE *node;
{
if (node == 0) return Qtrue;
switch (nd_type(node)) {
case NODE_RETURN:
case NODE_BREAK:
case NODE_NEXT:
case NODE_REDO:
case NODE_RETRY:
case NODE_WHILE:
case NODE_UNTIL:
case NODE_CLASS:
case NODE_MODULE:
case NODE_DEFN:
case NODE_DEFS:
yyerror("void value expression");
return Qfalse;
break;
case NODE_BLOCK:
while (node->nd_next) {
node = node->nd_next;
}
return value_expr(node->nd_head);
case NODE_BEGIN:
return value_expr(node->nd_body);
case NODE_IF:
return value_expr(node->nd_body) && value_expr(node->nd_else);
case NODE_NEWLINE:
return value_expr(node->nd_next);
default:
return Qtrue;
}
}
static void
void_expr(node)
NODE *node;
{
char *useless = 0;
if (!ruby_verbose) return;
if (!node) return;
again:
switch (nd_type(node)) {
case NODE_NEWLINE:
node = node->nd_next;
goto again;
case NODE_CALL:
switch (node->nd_mid) {
case '+':
case '-':
case '*':
case '/':
case '%':
case tPOW:
case tUPLUS:
case tUMINUS:
case '|':
case '^':
case '&':
case tCMP:
case '>':
case tGEQ:
case '<':
case tLEQ:
case tEQ:
case tNEQ:
useless = rb_id2name(node->nd_mid);
break;
}
break;
case NODE_LVAR:
case NODE_DVAR:
case NODE_GVAR:
case NODE_IVAR:
case NODE_CVAR:
case NODE_NTH_REF:
case NODE_BACK_REF:
useless = "a variable";
break;
case NODE_CONST:
case NODE_CREF:
useless = "a constant";
break;
case NODE_LIT:
case NODE_STR:
case NODE_DSTR:
case NODE_DREGX:
case NODE_DREGX_ONCE:
useless = "a literal";
break;
case NODE_COLON2:
case NODE_COLON3:
useless = "::";
break;
case NODE_DOT2:
useless = "..";
break;
case NODE_DOT3:
useless = "...";
break;
case NODE_SELF:
useless = "self";
break;
case NODE_NIL:
useless = "nil";
break;
case NODE_TRUE:
useless = "true";
break;
case NODE_FALSE:
useless = "false";
break;
case NODE_DEFINED:
useless = "defined?";
break;
}
if (useless) {
int line = ruby_sourceline;
ruby_sourceline = nd_line(node);
rb_warn("useless use of %s in void context", useless);
ruby_sourceline = line;
}
}
static NODE *cond2 _((NODE*));
static void
void_stmts(node)
NODE *node;
{
if (!ruby_verbose) return;
if (!node) return;
if (nd_type(node) != NODE_BLOCK) return;
for (;;) {
if (!node->nd_next) return;
void_expr(node->nd_head);
node = node->nd_next;
}
}
static int
assign_in_cond(node)
NODE *node;
{
switch (nd_type(node)) {
case NODE_MASGN:
yyerror("multiple assignment in conditional");
return 1;
case NODE_LASGN:
case NODE_DASGN:
case NODE_GASGN:
case NODE_IASGN:
break;
case NODE_NEWLINE:
default:
return 0;
}
switch (nd_type(node->nd_value)) {
case NODE_LIT:
case NODE_STR:
case NODE_NIL:
case NODE_TRUE:
case NODE_FALSE:
/* reports always */
rb_warn("found = in conditional, should be ==");
return 1;
case NODE_DSTR:
case NODE_XSTR:
case NODE_DXSTR:
case NODE_EVSTR:
case NODE_DREGX:
default:
break;
}
#if 0
if (assign_in_cond(node->nd_value) == 0) {
rb_warning("assignment in condition");
}
#endif
return 1;
}
static NODE*
cond0(node)
NODE *node;
{
enum node_type type = nd_type(node);
assign_in_cond(node);
switch (type) {
case NODE_DREGX:
case NODE_DREGX_ONCE:
local_cnt('_');
local_cnt('~');
return NEW_MATCH2(node, NEW_GVAR(rb_intern("$_")));
case NODE_DOT2:
case NODE_DOT3:
node->nd_beg = cond2(node->nd_beg);
node->nd_end = cond2(node->nd_end);
if (type == NODE_DOT2) nd_set_type(node,NODE_FLIP2);
else if (type == NODE_DOT3) nd_set_type(node, NODE_FLIP3);
node->nd_cnt = local_append(0);
return node;
case NODE_LIT:
if (TYPE(node->nd_lit) == T_REGEXP) {
local_cnt('_');
local_cnt('~');
return NEW_MATCH(node);
}
if (TYPE(node->nd_lit) == T_STRING) {
local_cnt('_');
local_cnt('~');
return NEW_MATCH(rb_reg_new(RSTRING(node)->ptr,RSTRING(node)->len,0));
}
default:
return node;
}
}
static NODE*
cond(node)
NODE *node;
{
if (node == 0) return 0;
if (nd_type(node) == NODE_NEWLINE){
node->nd_next = cond0(node->nd_next);
return node;
}
return cond0(node);
}
static NODE*
cond2(node)
NODE *node;
{
enum node_type type;
node = cond(node);
type = nd_type(node);
if (type == NODE_NEWLINE) node = node->nd_next;
if (type == NODE_LIT && FIXNUM_P(node->nd_lit)) {
return call_op(node,tEQ,1,NEW_GVAR(rb_intern("$.")));
}
return node;
}
static NODE*
logop(type, left, right)
enum node_type type;
NODE *left, *right;
{
value_expr(left);
return rb_node_newnode(type, cond(left), cond(right), 0);
}
static NODE *
arg_blk_pass(node1, node2)
NODE *node1;
NODE *node2;
{
if (node2) {
node2->nd_head = node1;
return node2;
}
return node1;
}
static NODE*
new_call(r,m,a)
NODE *r;
ID m;
NODE *a;
{
if (a && nd_type(a) == NODE_BLOCK_PASS) {
a->nd_iter = NEW_CALL(r,m,a->nd_head);
return a;
}
return NEW_CALL(r,m,a);
}
static NODE*
new_fcall(m,a)
ID m;
NODE *a;
{
if (a && nd_type(a) == NODE_BLOCK_PASS) {
a->nd_iter = NEW_FCALL(m,a->nd_head);
return a;
}
return NEW_FCALL(m,a);
}
static NODE*
new_super(a)
NODE *a;
{
if (a && nd_type(a) == NODE_BLOCK_PASS) {
a->nd_iter = NEW_SUPER(a->nd_head);
return a;
}
return NEW_SUPER(a);
}
static struct local_vars {
ID *tbl;
int nofree;
int cnt;
int dlev;
struct local_vars *prev;
} *lvtbl;
static void
local_push()
{
struct local_vars *local;
local = ALLOC(struct local_vars);
local->prev = lvtbl;
local->nofree = 0;
local->cnt = 0;
local->tbl = 0;
local->dlev = 0;
lvtbl = local;
}
static void
local_pop()
{
struct local_vars *local = lvtbl->prev;
if (lvtbl->tbl) {
if (!lvtbl->nofree) free(lvtbl->tbl);
else lvtbl->tbl[0] = lvtbl->cnt;
}
free(lvtbl);
lvtbl = local;
}
static ID*
local_tbl()
{
lvtbl->nofree = 1;
return lvtbl->tbl;
}
static int
local_append(id)
ID id;
{
if (lvtbl->tbl == 0) {
lvtbl->tbl = ALLOC_N(ID, 4);
lvtbl->tbl[0] = 0;
lvtbl->tbl[1] = '_';
lvtbl->tbl[2] = '~';
lvtbl->cnt = 2;
if (id == '_') return 0;
if (id == '~') return 1;
}
else {
REALLOC_N(lvtbl->tbl, ID, lvtbl->cnt+2);
}
lvtbl->tbl[lvtbl->cnt+1] = id;
return lvtbl->cnt++;
}
static int
local_cnt(id)
ID id;
{
int cnt, max;
if (id == 0) return lvtbl->cnt;
for (cnt=1, max=lvtbl->cnt+1; cnt<max;cnt++) {
if (lvtbl->tbl[cnt] == id) return cnt-1;
}
return local_append(id);
}
static int
local_id(id)
ID id;
{
int i, max;
if (lvtbl == 0) return Qfalse;
for (i=3, max=lvtbl->cnt+1; i<max; i++) {
if (lvtbl->tbl[i] == id) return Qtrue;
}
return Qfalse;
}
static void
top_local_init()
{
local_push();
lvtbl->cnt = ruby_scope->local_tbl?ruby_scope->local_tbl[0]:0;
if (lvtbl->cnt > 0) {
lvtbl->tbl = ALLOC_N(ID, lvtbl->cnt+3);
MEMCPY(lvtbl->tbl, ruby_scope->local_tbl, ID, lvtbl->cnt+1);
}
else {
lvtbl->tbl = 0;
}
if (ruby_dyna_vars)
lvtbl->dlev = 1;
else
lvtbl->dlev = 0;
}
static void
top_local_setup()
{
int len = lvtbl->cnt;
int i;
if (len > 0) {
i = ruby_scope->local_tbl?ruby_scope->local_tbl[0]:0;
if (i < len) {
if (i == 0 || (ruby_scope->flag & SCOPE_MALLOC) == 0) {
VALUE *vars = ALLOC_N(VALUE, len+1);
if (ruby_scope->local_vars) {
*vars++ = ruby_scope->local_vars[-1];
MEMCPY(vars, ruby_scope->local_vars, VALUE, i);
rb_mem_clear(vars+i, len-i);
}
else {
*vars++ = 0;
rb_mem_clear(vars, len);
}
ruby_scope->local_vars = vars;
ruby_scope->flag |= SCOPE_MALLOC;
}
else {
VALUE *vars = ruby_scope->local_vars-1;
REALLOC_N(vars, VALUE, len+1);
ruby_scope->local_vars = vars+1;
rb_mem_clear(ruby_scope->local_vars+i, len-i);
}
if (ruby_scope->local_tbl && ruby_scope->local_vars[-1] == 0) {
free(ruby_scope->local_tbl);
}
ruby_scope->local_vars[-1] = 0;
ruby_scope->local_tbl = local_tbl();
}
}
local_pop();
}
static struct RVarmap*
dyna_push()
{
struct RVarmap* vars = ruby_dyna_vars;
rb_dvar_push(0, 0);
lvtbl->dlev++;
return vars;
}
static void
dyna_pop(vars)
struct RVarmap* vars;
{
lvtbl->dlev--;
ruby_dyna_vars = vars;
}
static int
dyna_in_block()
{
return (lvtbl->dlev > 0);
}
void
rb_parser_append_print()
{
ruby_eval_tree =
block_append(ruby_eval_tree,
NEW_FCALL(rb_intern("print"),
NEW_ARRAY(NEW_GVAR(rb_intern("$_")))));
}
void
rb_parser_while_loop(chop, split)
int chop, split;
{
if (split) {
ruby_eval_tree =
block_append(NEW_GASGN(rb_intern("$F"),
NEW_CALL(NEW_GVAR(rb_intern("$_")),
rb_intern("split"), 0)),
ruby_eval_tree);
}
if (chop) {
ruby_eval_tree =
block_append(NEW_CALL(NEW_GVAR(rb_intern("$_")),
rb_intern("chop!"), 0), ruby_eval_tree);
}
ruby_eval_tree = NEW_OPT_N(ruby_eval_tree);
}
static struct {
ID token;
char *name;
} op_tbl[] = {
tDOT2, "..",
tDOT3, "...",
'+', "+",
'-', "-",
'+', "+(binary)",
'-', "-(binary)",
'*', "*",
'/', "/",
'%', "%",
tPOW, "**",
tUPLUS, "+@",
tUMINUS, "-@",
tUPLUS, "+(unary)",
tUMINUS, "-(unary)",
'|', "|",
'^', "^",
'&', "&",
tCMP, "<=>",
'>', ">",
tGEQ, ">=",
'<', "<",
tLEQ, "<=",
tEQ, "==",
tEQQ, "===",
tNEQ, "!=",
tMATCH, "=~",
tNMATCH, "!~",
'!', "!",
'~', "~",
'!', "!(unary)",
'~', "~(unary)",
'!', "!@",
'~', "~@",
tAREF, "[]",
tASET, "[]=",
tLSHFT, "<<",
tRSHFT, ">>",
tCOLON2, "::",
tCOLON3, "::",
'`', "`",
0, 0,
};
static st_table *sym_tbl;
static st_table *sym_rev_tbl;
void
Init_sym()
{
sym_tbl = st_init_strtable_with_size(200);
sym_rev_tbl = st_init_numtable_with_size(200);
rb_global_variable((VALUE*)&lex_lastline);
}
ID
rb_intern(name)
const char *name;
{
static ID last_id = LAST_TOKEN;
ID id;
int last;
if (st_lookup(sym_tbl, name, &id))
return id;
id = 0;
switch (name[0]) {
case '$':
id |= ID_GLOBAL;
break;
case '@':
if (name[1] == '@')
id |= ID_CLASS;
else
id |= ID_INSTANCE;
break;
default:
if (name[0] != '_' && !ISALPHA(name[0]) && !ismbchar(name[0])) {
/* operator */
int i;
for (i=0; op_tbl[i].token; i++) {
if (*op_tbl[i].name == *name &&
strcmp(op_tbl[i].name, name) == 0) {
id = op_tbl[i].token;
goto id_regist;
}
}
}
last = strlen(name)-1;
if (name[last] == '=') {
/* attribute assignment */
char *buf = ALLOCA_N(char,last+1);
strncpy(buf, name, last);
buf[last] = '\0';
id = rb_intern(buf);
if (id > LAST_TOKEN && !is_attrset_id(id)) {
id = rb_id_attrset(id);
goto id_regist;
}
id = ID_ATTRSET;
}
else if (ISUPPER(name[0])) {
id = ID_CONST;
}
else {
id = ID_LOCAL;
}
break;
}
id |= ++last_id << ID_SCOPE_SHIFT;
id_regist:
name = strdup(name);
st_add_direct(sym_tbl, name, id);
st_add_direct(sym_rev_tbl, id, name);
return id;
}
char *
rb_id2name(id)
ID id;
{
char *name;
if (id < LAST_TOKEN) {
int i = 0;
for (i=0; op_tbl[i].token; i++) {
if (op_tbl[i].token == id)
return op_tbl[i].name;
}
}
if (st_lookup(sym_rev_tbl, id, &name))
return name;
if (is_attrset_id(id)) {
ID id2 = (id & ~ID_SCOPE_MASK) | ID_LOCAL;
again:
name = rb_id2name(id2);
if (name) {
char *buf = ALLOCA_N(char, strlen(name)+2);
strcpy(buf, name);
strcat(buf, "=");
rb_intern(buf);
return rb_id2name(id);
}
if (is_local_id(id2)) {
id2 = (id & ~ID_SCOPE_MASK) | ID_CONST;
goto again;
}
}
return 0;
}
int
rb_is_const_id(id)
ID id;
{
if (is_const_id(id)) return Qtrue;
return Qfalse;
}
int
rb_is_class_id(id)
ID id;
{
if (is_class_id(id)) return Qtrue;
return Qfalse;
}
int
rb_is_instance_id(id)
ID id;
{
if (is_instance_id(id)) return Qtrue;
return Qfalse;
}
static void
special_local_set(c, val)
char c;
VALUE val;
{
int cnt;
top_local_init();
cnt = local_cnt(c);
top_local_setup();
ruby_scope->local_vars[cnt] = val;
}
VALUE
rb_backref_get()
{
if (ruby_scope->local_vars) {
return ruby_scope->local_vars[1];
}
return Qnil;
}
void
rb_backref_set(val)
VALUE val;
{
if (ruby_scope->local_vars) {
ruby_scope->local_vars[1] = val;
}
else {
special_local_set('~', val);
}
}
VALUE
rb_lastline_get()
{
if (ruby_scope->local_vars) {
return ruby_scope->local_vars[0];
}
return Qnil;
}
void
rb_lastline_set(val)
VALUE val;
{
if (ruby_scope->local_vars) {
ruby_scope->local_vars[0] = val;
}
else {
special_local_set('_', val);
}
}