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parse.y
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/**********************************************************************
parse.y -
$Author$
$Date$
created at: Fri May 28 18:02:42 JST 1993
Copyright (C) 1993-2004 Yukihiro Matsumoto
**********************************************************************/
%{
#define YYDEBUG 1
#include "ruby.h"
#include "env.h"
#include "intern.h"
#include "node.h"
#include "st.h"
#include <stdio.h>
#include <errno.h>
#include <ctype.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 ID_JUNK 0x07
#define ID_INTERNAL ID_JUNK
#define is_notop_id(id) ((id)>tLAST_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)
#define is_junk_id(id) (is_notop_id(id)&&((id)&ID_SCOPE_MASK)==ID_JUNK)
#define is_asgn_or_id(id) ((is_notop_id(id)) && \
(((id)&ID_SCOPE_MASK) == ID_GLOBAL || \
((id)&ID_SCOPE_MASK) == ID_INSTANCE || \
((id)&ID_SCOPE_MASK) == ID_CLASS))
#ifndef RIPPER
char *ruby_sourcefile; /* current source file */
int ruby_sourceline; /* current line no. */
#endif
enum lex_state_e {
EXPR_BEG, /* ignore newline, +/- is a sign. */
EXPR_END, /* newline significant, +/- is a operator. */
EXPR_END2, /* newline significant, +/- is a operator. */
EXPR_ARG, /* newline significant, +/- is a operator. */
EXPR_CMDARG, /* newline significant, +/- is a operator. */
EXPR_ENDARG, /* 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. */
EXPR_VALUE, /* alike EXPR_BEG but label is disallowed. */
};
# ifdef HAVE_LONG_LONG
typedef unsigned LONG_LONG stack_type;
# else
typedef unsigned long stack_type;
# endif
# define BITSTACK_PUSH(stack, n) (stack = (stack<<1)|((n)&1))
# define BITSTACK_POP(stack) (stack = stack >> 1)
# define BITSTACK_LEXPOP(stack) (stack = (stack >> 1) | (stack & 1))
# define BITSTACK_SET_P(stack) (stack&1)
#define COND_PUSH(n) BITSTACK_PUSH(cond_stack, n)
#define COND_POP() BITSTACK_POP(cond_stack)
#define COND_LEXPOP() BITSTACK_LEXPOP(cond_stack)
#define COND_P() BITSTACK_SET_P(cond_stack)
#define CMDARG_PUSH(n) BITSTACK_PUSH(cmdarg_stack, n)
#define CMDARG_POP() BITSTACK_POP(cmdarg_stack)
#define CMDARG_LEXPOP() BITSTACK_LEXPOP(cmdarg_stack)
#define CMDARG_P() BITSTACK_SET_P(cmdarg_stack)
/* must sync with real YYSTYPE */
union tmpyystype {
VALUE val;
NODE *node;
unsigned long id;
int num;
struct RVarmap *vars;
};
struct local_vars {
ID *tbl;
int nofree;
int cnt;
int dlev;
int dname_size;
ID *dnames;
struct RVarmap* dyna_vars;
struct local_vars *prev;
};
/*
Structure of Lexer Buffer:
lex_pbeg tokp lex_p lex_pend
| | | |
|-----------+--------------+------------|
|<------------>|
token
*/
struct parser_params {
union tmpyystype *parser_yylval; /* YYSTYPE not defined yet */
VALUE eofp;
NODE *parser_lex_strterm;
enum lex_state_e parser_lex_state;
stack_type parser_cond_stack;
stack_type parser_cmdarg_stack;
int parser_class_nest;
int parser_paren_nest;
int parser_lpar_beg;
int parser_in_single;
int parser_in_def;
int parser_compile_for_eval;
VALUE parser_cur_mid;
int parser_in_defined;
char *parser_tokenbuf;
int parser_tokidx;
int parser_toksiz;
VALUE parser_lex_input;
VALUE parser_lex_lastline;
char *parser_lex_pbeg;
char *parser_lex_p;
char *parser_lex_pend;
int parser_heredoc_end;
int parser_command_start;
int parser_lex_gets_ptr;
VALUE (*parser_lex_gets) _((struct parser_params*,VALUE));
struct local_vars *parser_lvtbl;
int parser_ruby__end__seen;
#ifndef RIPPER
/* Ruby core only */
NODE *parser_eval_tree_begin;
NODE *parser_eval_tree;
VALUE debug_lines;
#else
/* Ripper only */
int parser_ruby_sourceline;
VALUE parser_ruby_sourcefile;
char *tokp;
VALUE delayed;
int delayed_line;
int delayed_col;
VALUE value;
VALUE result;
VALUE parsing_thread;
int toplevel_p;
#endif
int line_count;
int has_shebang;
};
static int parser_yyerror _((struct parser_params*, const char*));
#define yyerror(msg) parser_yyerror(parser, msg)
#define YYPARSE_PARAM parser_v
#define YYLEX_PARAM parser_v
#define parser ((struct parser_params*)parser_v)
#define ruby_eval_tree (parser->parser_eval_tree)
#define ruby_eval_tree_begin (parser->parser_eval_tree_begin)
#define lex_strterm (parser->parser_lex_strterm)
#define lex_state (parser->parser_lex_state)
#define cond_stack (parser->parser_cond_stack)
#define cmdarg_stack (parser->parser_cmdarg_stack)
#define class_nest (parser->parser_class_nest)
#define paren_nest (parser->parser_paren_nest)
#define lpar_beg (parser->parser_lpar_beg)
#define in_single (parser->parser_in_single)
#define in_def (parser->parser_in_def)
#define compile_for_eval (parser->parser_compile_for_eval)
#define cur_mid (parser->parser_cur_mid)
#define in_defined (parser->parser_in_defined)
#define tokenbuf (parser->parser_tokenbuf)
#define tokidx (parser->parser_tokidx)
#define toksiz (parser->parser_toksiz)
#define lex_input (parser->parser_lex_input)
#define lex_lastline (parser->parser_lex_lastline)
#define lex_pbeg (parser->parser_lex_pbeg)
#define lex_p (parser->parser_lex_p)
#define lex_pend (parser->parser_lex_pend)
#define heredoc_end (parser->parser_heredoc_end)
#define command_start (parser->parser_command_start)
#define lex_gets_ptr (parser->parser_lex_gets_ptr)
#define lex_gets (parser->parser_lex_gets)
#define lvtbl (parser->parser_lvtbl)
#define ruby__end__seen (parser->parser_ruby__end__seen)
#ifdef RIPPER
#define ruby_sourceline (parser->parser_ruby_sourceline)
#define ruby_sourcefile (parser->parser_ruby_sourcefile)
#else
#define ruby_debug_lines (parser->debug_lines)
#endif
static int yylex _((void*, void*));
#ifndef RIPPER
#define yyparse parser_yyparse
#define yydebug ruby_yydebug
static NODE *cond_gen _((struct parser_params*,NODE*));
#define cond(node) cond_gen(parser, node)
static NODE *logop_gen _((struct parser_params*,enum node_type,NODE*,NODE*));
#define logop(type,node1,node2) logop_gen(parser, type, node1, node2)
static int cond_negative _((NODE**));
static NODE *newline_node _((NODE*));
static void fixpos _((NODE*,NODE*));
static int value_expr_gen _((struct parser_params*,NODE*));
static void void_expr_gen _((struct parser_params*,NODE*));
static NODE *remove_begin _((NODE*));
#define value_expr(node) value_expr_gen(parser, (node) = remove_begin(node))
#define void_expr(node) void_expr_gen(parser, (node) = remove_begin(node))
static void void_stmts_gen _((struct parser_params*,NODE*));
#define void_stmts(node) void_stmts_gen(parser, node)
static void reduce_nodes _((NODE**));
static void block_dup_check _((NODE*));
static NODE *block_append _((NODE*,NODE*));
static NODE *list_append _((NODE*,NODE*));
static NODE *list_concat _((NODE*,NODE*));
static NODE *arg_concat _((NODE*,NODE*));
static NODE *literal_concat _((NODE*,NODE*));
static NODE *new_evstr _((NODE*));
static NODE *evstr2dstr _((NODE*));
static NODE *call_op_gen _((struct parser_params*,NODE*,ID,int,NODE*));
#define call_op(recv,id,narg,arg1) call_op_gen(parser, recv,id,narg,arg1)
static NODE *new_args_gen _((struct parser_params*,VALUE,NODE*,NODE*,NODE*));
#define new_args(f,o,r,b) new_args_gen(parser, f,o,r,b)
static void shadowing_lvar_gen _((struct parser_params*,ID));
#define shadowing_lvar(name) shadowing_lvar_gen(parser, name)
static NODE *negate_lit _((NODE*));
static NODE *ret_args _((NODE*));
static NODE *arg_blk_pass _((NODE*,NODE*));
static NODE *new_call _((NODE*,ID,NODE*));
static NODE *new_fcall_gen _((struct parser_params*,ID,NODE*));
#define new_fcall(id,args) new_fcall_gen(parser, id, args)
static NODE *new_super _((NODE*));
static NODE *new_yield _((NODE*));
static NODE *gettable_gen _((struct parser_params*,ID));
#define gettable(id) gettable_gen(parser,id)
static NODE *assignable_gen _((struct parser_params*,ID,NODE*));
#define assignable(id,node) assignable_gen(parser, id, node)
static NODE *new_bv_gen _((struct parser_params*,ID,NODE*));
#define new_bv(id,node) new_bv_gen(parser, id, node)
static NODE *aryset_gen _((struct parser_params*,NODE*,NODE*));
#define aryset(node1,node2) aryset_gen(parser, node1, node2)
static NODE *attrset_gen _((struct parser_params*,NODE*,ID));
#define attrset(node,id) attrset_gen(parser, node, id)
static void rb_backref_error _((NODE*));
static NODE *node_assign_gen _((struct parser_params*,NODE*,NODE*));
#define node_assign(node1, node2) node_assign_gen(parser, node1, node2)
static NODE *match_op_gen _((struct parser_params*,NODE*,NODE*));
#define match_op(node1,node2) match_op_gen(parser, node1, node2)
static void local_push_gen _((struct parser_params*,int));
#define local_push(top) local_push_gen(parser,top)
static void local_pop_gen _((struct parser_params*));
#define local_pop() local_pop_gen(parser)
static int local_append_gen _((struct parser_params*, ID));
#define local_append(id) local_append_gen(parser, id)
static int local_cnt_gen _((struct parser_params*, ID));
#define local_cnt(id) local_cnt_gen(parser, id)
static int local_id_gen _((struct parser_params*, ID));
#define local_id(id) local_id_gen(parser, id)
static ID *local_tbl_gen _((struct parser_params*));
#define local_tbl() local_tbl_gen(parser)
static ID internal_id _((void));
static struct RVarmap *dyna_push_gen _((struct parser_params*));
#define dyna_push() dyna_push_gen(parser)
static void dyna_pop_gen _((struct parser_params*, struct RVarmap*));
#define dyna_pop(vars) dyna_pop_gen(parser, vars)
static int dyna_in_block_gen _((struct parser_params*));
#define dyna_in_block() dyna_in_block_gen(parser)
static NODE *dyna_init_gen _((struct parser_params*, NODE*, struct RVarmap *));
#define dyna_init(node, pre) dyna_init_gen(parser, node, pre)
static void dyna_var_gen _((struct parser_params*,ID));
#define dyna_var(id) dyna_var_gen(parser, id)
static void dyna_check_gen _((struct parser_params*,ID));
#define dyna_check(id) dyna_check_gen(parser, id)
static void top_local_init_gen _((struct parser_params*));
#define top_local_init() top_local_init_gen(parser)
static void top_local_setup_gen _((struct parser_params*));
#define top_local_setup() top_local_setup_gen(parser)
#else
#define remove_begin(node) (node)
#endif /* !RIPPER */
static int lvar_defined_gen _((struct parser_params*, ID));
#define lvar_defined(id) lvar_defined_gen(parser, id)
#define RE_OPTION_ONCE (1<<16)
#define NODE_STRTERM NODE_ZARRAY /* nothing to gc */
#define NODE_HEREDOC NODE_ARRAY /* 1, 3 to gc */
#define SIGN_EXTEND(x,n) (((1<<(n)-1)^((x)&~(~0<<(n))))-(1<<(n)-1))
#define nd_func u1.id
#if SIZEOF_SHORT == 2
#define nd_term(node) ((signed short)(node)->u2.id)
#else
#define nd_term(node) SIGN_EXTEND((node)->u2.id, CHAR_BIT*2)
#endif
#define nd_paren(node) (char)((node)->u2.id >> CHAR_BIT*2)
#define nd_nest u3.cnt
/****** Ripper *******/
#ifdef RIPPER
#define RIPPER_VERSION "0.1.0"
#include "eventids1.c"
#include "eventids2.c"
static ID ripper_id_gets;
static VALUE ripper_dispatch0 _((struct parser_params*,ID));
static VALUE ripper_dispatch1 _((struct parser_params*,ID,VALUE));
static VALUE ripper_dispatch2 _((struct parser_params*,ID,VALUE,VALUE));
static VALUE ripper_dispatch3 _((struct parser_params*,ID,VALUE,VALUE,VALUE));
static VALUE ripper_dispatch4 _((struct parser_params*,ID,VALUE,VALUE,VALUE,VALUE));
static VALUE ripper_dispatch5 _((struct parser_params*,ID,VALUE,VALUE,VALUE,VALUE,VALUE));
#define dispatch0(n) ripper_dispatch0(parser, TOKEN_PASTE(ripper_id_, n))
#define dispatch1(n,a) ripper_dispatch1(parser, TOKEN_PASTE(ripper_id_, n), a)
#define dispatch2(n,a,b) ripper_dispatch2(parser, TOKEN_PASTE(ripper_id_, n), a, b)
#define dispatch3(n,a,b,c) ripper_dispatch3(parser, TOKEN_PASTE(ripper_id_, n), a, b, c)
#define dispatch4(n,a,b,c,d) ripper_dispatch4(parser, TOKEN_PASTE(ripper_id_, n), a, b, c, d)
#define dispatch5(n,a,b,c,d,e) ripper_dispatch5(parser, TOKEN_PASTE(ripper_id_, n), a, b, c, d, e)
#define yyparse ripper_yyparse
#define yydebug ripper_yydebug
static VALUE ripper_intern _((const char*));
static VALUE ripper_id2sym _((ID));
#define arg_new() dispatch0(arglist_new)
#define arg_add(l,a) dispatch2(arglist_add, l, a)
#define arg_prepend(l,a) dispatch2(arglist_prepend, l, a)
#define arg_add_star(l,a) dispatch2(arglist_add_star, l, a)
#define arg_add_block(l,b) dispatch2(arglist_add_block, l, b)
#define arg_add_optblock(l,b) ((b)==Qundef? l : dispatch2(arglist_add_block, l, b))
#define bare_assoc(v) dispatch1(bare_assoc_hash, v)
#define arg_add_assocs(l,b) arg_add(l, bare_assoc(b))
#define args2mrhs(a) dispatch1(mrhs_new_from_arglist, a)
#define mrhs_new() dispatch0(mrhs_new)
#define mrhs_add(l,a) dispatch2(mrhs_add, l, a)
#define mrhs_add_star(l,a) dispatch2(mrhs_add_star, l, a)
#define mlhs_new() dispatch0(mlhs_new)
#define mlhs_add(l,a) dispatch2(mlhs_add, l, a)
#define mlhs_add_star(l,a) dispatch2(mlhs_add_star, l, a)
#define blockvar_new(p) dispatch1(blockvar_new, p)
#define blockvar_add_star(l,a) dispatch2(blockvar_add_star, l, a)
#define blockvar_add_block(l,a) dispatch2(blockvar_add_block, l, a)
#define method_optarg(m,a) ((a)==Qundef ? m : dispatch2(method_add_arg,m,a))
#define method_arg(m,a) dispatch2(method_add_arg,m,a)
#define escape_Qundef(x) ((x)==Qundef ? Qnil : (x))
#define FIXME 0
#endif /* RIPPER */
#ifndef RIPPER
# define ifndef_ripper(x) x
#else
# define ifndef_ripper(x)
#endif
#ifndef RIPPER
# define rb_warn0(fmt) rb_warn(fmt)
# define rb_warnI(fmt,a) rb_warn(fmt,a)
# define rb_warnS(fmt,a) rb_warn(fmt,a)
# define rb_warning0(fmt) rb_warning(fmt)
# define rb_warningS(fmt,a) rb_warning(fmt,a)
#else
# define rb_warn0(fmt) ripper_warn0(parser, fmt)
# define rb_warnI(fmt,a) ripper_warnI(parser, fmt, a)
# define rb_warnS(fmt,a) ripper_warnS(parser, fmt, a)
# define rb_warning0(fmt) ripper_warning0(parser, fmt)
# define rb_warningS(fmt,a) ripper_warningS(parser, fmt, a)
static void ripper_warn0 _((struct parser_params*, const char*));
static void ripper_warnI _((struct parser_params*, const char*, int));
static void ripper_warnS _((struct parser_params*, const char*, const char*));
static void ripper_warning0 _((struct parser_params*, const char*));
static void ripper_warningS _((struct parser_params*, const char*, const char*));
#endif
#ifdef RIPPER
static void ripper_compile_error _((struct parser_params*, const char *fmt, ...));
# define rb_compile_error ripper_compile_error
# define compile_error ripper_compile_error
# define PARSER_ARG parser,
#else
# define compile_error rb_compile_error
# define PARSER_ARG
#endif
#define NEW_BLOCK_PARAM(b, v) NEW_NODE(NODE_BLOCK_PASS, 0, b, v)
/* Older versions of Yacc set YYMAXDEPTH to a very low value by default (150,
for instance). This is too low for Ruby to parse some files, such as
date/format.rb, therefore bump the value up to at least Bison's default. */
#ifdef OLD_YACC
#ifndef YYMAXDEPTH
#define YYMAXDEPTH 10000
#endif
#endif
%}
%pure_parser
%union {
VALUE val;
NODE *node;
ID id;
int num;
struct RVarmap *vars;
}
/*%%%*/
%token
/*%
%token <val>
%*/
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
kDO_LAMBDA
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 tLABEL
%token <node> tINTEGER tFLOAT tSTRING_CONTENT
%token <node> tNTH_REF tBACK_REF
%token <num> tREGEXP_END
%type <node> singleton strings string string1 xstring regexp
%type <node> string_contents xstring_contents string_content
%type <node> words qwords word_list qword_list word
%type <node> literal numeric dsym cpath
%type <node> bodystmt compstmt stmts stmt expr arg primary command command_call method_call
%type <node> expr_value arg_value primary_value
%type <node> if_tail opt_else case_body cases opt_rescue exc_list exc_var opt_ensure
%type <node> args when_args call_args call_args2 open_args paren_args opt_paren_args
%type <node> command_args aref_args opt_block_arg block_arg var_ref var_lhs
%type <node> mrhs superclass block_call block_command
%type <node> f_arglist f_args f_rest_arg f_optarg f_opt f_block_arg opt_f_block_arg
%type <node> assoc_list assocs assoc undef_list backref string_dvar
%type <node> for_var block_param opt_block_param block_param_def block_param0
%type <node> opt_bv_decl bv_decls bv_decl lambda f_larglist lambda_body
%type <node> brace_block cmd_brace_block do_block lhs none fitem
%type <node> mlhs mlhs_head mlhs_basic mlhs_entry mlhs_item mlhs_node
%type <id> fsym variable sym symbol operation operation2 operation3
%type <id> cname fname op f_norm_arg
%type <val> f_arg
/*%%%*/
/*%
%type <val> program reswords then do dot_or_colon
%*/
%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 tLPAREN_ARG /* ( */
%token tRPAREN /* ) */
%token tLBRACK /* [ */
%token tLBRACE /* { */
%token tLBRACE_ARG /* { */
%token tSTAR /* * */
%token tAMPER /* & */
%token tLAMBDA /* -> */
%token tLAMBDA_ARG /* -> */
%token tSYMBEG tSTRING_BEG tXSTRING_BEG tREGEXP_BEG tWORDS_BEG tQWORDS_BEG
%token tSTRING_DBEG tSTRING_DVAR tSTRING_END tLAMBEG
/*
* precedence table
*/
%nonassoc tLOWEST
%nonassoc tLBRACE_ARG
%nonassoc kIF_MOD kUNLESS_MOD kWHILE_MOD kUNTIL_MOD
%left kOR kAND
%right kNOT
%nonassoc kDEFINED
%right '=' tOP_ASGN
%left kRESCUE_MOD
%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 tUMINUS_NUM tUMINUS
%right tPOW
%right '!' '~' tUPLUS
%token tLAST_TOKEN
%%
program : {
/*%%%*/
lex_state = EXPR_BEG;
top_local_init();
if (ruby_class == rb_cObject) class_nest = 0;
else class_nest = 1;
/*%
lex_state = EXPR_BEG;
class_nest = !parser->toplevel_p;
$$ = Qnil;
%*/
}
compstmt
{
/*%%%*/
if ($2 && !compile_for_eval) {
/* last expression should not be void */
if (nd_type($2) != NODE_BLOCK) void_expr($2);
else {
NODE *node = $2;
while (node->nd_next) {
node = node->nd_next;
}
void_expr(node->nd_head);
}
}
ruby_eval_tree = block_append(ruby_eval_tree, $2);
top_local_setup();
class_nest = 0;
/*%
class_nest = 0;
$$ = $2;
parser->result = dispatch1(program, $$);
%*/
}
;
bodystmt : compstmt
opt_rescue
opt_else
opt_ensure
{
/*%%%*/
$$ = $1;
if ($2) {
$$ = NEW_RESCUE($1, $2, $3);
}
else if ($3) {
rb_warn("else without rescue is useless");
$$ = block_append($$, $3);
}
if ($4) {
if ($$) {
$$ = NEW_ENSURE($$, $4);
}
else {
$$ = block_append($4, NEW_NIL());
}
}
fixpos($$, $1);
/*%
$$ = dispatch4(bodystmt,
escape_Qundef($1),
escape_Qundef($2),
escape_Qundef($3),
escape_Qundef($4));
%*/
}
;
compstmt : stmts opt_terms
{
/*%%%*/
void_stmts($1);
$$ = $1;
/*%
$$ = $1;
%*/
}
;
stmts : none
/*%c%*/
/*%c
{
$$ = dispatch2(stmts_add, dispatch0(stmts_new),
dispatch0(void_stmt));
}
%*/
| stmt
{
/*%%%*/
$$ = newline_node(remove_begin($1));
/*%
$$ = dispatch2(stmts_add, dispatch0(stmts_new), $1);
%*/
}
| stmts terms stmt
{
/*%%%*/
$$ = block_append($1, newline_node(remove_begin($3)));
/*%
$$ = dispatch2(stmts_add, $1, $3);
%*/
}
| error stmt
{
$$ = remove_begin($2);
}
;
stmt : kALIAS fitem {lex_state = EXPR_FNAME;} fitem
{
/*%%%*/
$$ = NEW_ALIAS($2, $4);
/*%
$$ = dispatch2(alias, $2, $4);
%*/
}
| kALIAS tGVAR tGVAR
{
/*%%%*/
$$ = NEW_VALIAS($2, $3);
/*%
$$ = dispatch2(var_alias, $2, $3);
%*/
}
| kALIAS tGVAR tBACK_REF
{
/*%%%*/
char buf[3];
sprintf(buf, "$%c", (char)$3->nd_nth);
$$ = NEW_VALIAS($2, rb_intern(buf));
/*%
$$ = dispatch2(var_alias, $2, $3);
%*/
}
| kALIAS tGVAR tNTH_REF
{
/*%%%*/
yyerror("can't make alias for the number variables");
$$ = 0;
/*%
$$ = dispatch2(var_alias, $2, $3);
$$ = dispatch1(alias_error, $$);
%*/
}
| kUNDEF undef_list
{
/*%%%*/
$$ = $2;
/*%
$$ = dispatch1(undef, $2);
%*/
}
| stmt kIF_MOD expr_value
{
/*%%%*/
$$ = NEW_IF(cond($3), $1, 0);
fixpos($$, $3);
if (cond_negative(&$$->nd_cond)) {
$$->nd_else = $$->nd_body;
$$->nd_body = 0;
}
/*%
$$ = dispatch2(if_mod, $3, $1);
%*/
}
| stmt kUNLESS_MOD expr_value
{
/*%%%*/
$$ = NEW_UNLESS(cond($3), $1, 0);
fixpos($$, $3);
if (cond_negative(&$$->nd_cond)) {
$$->nd_body = $$->nd_else;
$$->nd_else = 0;
}
/*%
$$ = dispatch2(unless_mod, $3, $1);
%*/
}
| stmt kWHILE_MOD expr_value
{
/*%%%*/
if ($1 && nd_type($1) == NODE_BEGIN) {
$$ = NEW_WHILE(cond($3), $1->nd_body, 0);
}
else {
$$ = NEW_WHILE(cond($3), $1, 1);
}
if (cond_negative(&$$->nd_cond)) {
nd_set_type($$, NODE_UNTIL);
}
/*%
$$ = dispatch2(while_mod, $3, $1);
%*/
}
| stmt kUNTIL_MOD expr_value
{
/*%%%*/
if ($1 && nd_type($1) == NODE_BEGIN) {
$$ = NEW_UNTIL(cond($3), $1->nd_body, 0);
}
else {
$$ = NEW_UNTIL(cond($3), $1, 1);
}
if (cond_negative(&$$->nd_cond)) {
nd_set_type($$, NODE_WHILE);
}
/*%
$$ = dispatch2(until_mod, $3, $1);
%*/
}
| stmt kRESCUE_MOD stmt
{
/*%%%*/
$$ = NEW_RESCUE($1, NEW_RESBODY(0,$3,0), 0);
/*%
$$ = dispatch2(rescue_mod, $3, $1);
%*/
}
| klBEGIN
{
/*%%%*/
if (in_def || in_single) {
yyerror("BEGIN in method");
}
local_push(0);
/*%
if (in_def || in_single) {
yyerror("BEGIN in method");
}
%*/
}
'{' compstmt '}'
{
/*%%%*/
ruby_eval_tree_begin = block_append(ruby_eval_tree_begin,
NEW_PREEXE($4));
local_pop();
$$ = 0;
/*%
$$ = dispatch1(BEGIN, $4);
%*/
}
| klEND '{' compstmt '}'
{
/*%%%*/
if (in_def || in_single) {
rb_warn("END in method; use at_exit");
}
$$ = NEW_ITER(0, NEW_POSTEXE(), $3);
/*%
if (in_def || in_single) {
rb_warn0("END in method; use at_exit");
}
$$ = dispatch1(END, $3);
%*/
}
| lhs '=' command_call
{
/*%%%*/
$$ = node_assign($1, $3);
/*%
$$ = dispatch2(assign, $1, $3);
%*/
}
| mlhs '=' command_call
{
/*%%%*/
value_expr($3);
$1->nd_value = ($1->nd_head) ? NEW_TO_ARY($3) : NEW_ARRAY($3);
$$ = $1;
/*%
$$ = dispatch2(massign, $1, $3);
%*/
}
| var_lhs tOP_ASGN command_call
{
/*%%%*/
value_expr($3);
if ($1) {
ID vid = $1->nd_vid;
if ($2 == tOROP) {
$1->nd_value = $3;
$$ = NEW_OP_ASGN_OR(gettable(vid), $1);
if (is_asgn_or_id(vid)) {
$$->nd_aid = vid;
}
}
else if ($2 == tANDOP) {
$1->nd_value = $3;
$$ = NEW_OP_ASGN_AND(gettable(vid), $1);
}
else {
$$ = $1;
$$->nd_value = call_op(gettable(vid),$2,1,$3);
}
}
else {
$$ = 0;
}
/*%
$$ = dispatch3(opassign, $1, $2, $3);
%*/
}
| primary_value '[' aref_args ']' tOP_ASGN command_call
{
/*%%%*/
NODE *args;
value_expr($6);
args = NEW_LIST($6);
if ($3 && nd_type($3) != NODE_ARRAY)
$3 = NEW_LIST($3);
$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);
/*%
$$ = dispatch2(aref_field, $1, escape_Qundef($3));
$$ = dispatch3(opassign, $$, $5, $6);
%*/
}
| primary_value '.' tIDENTIFIER tOP_ASGN command_call
{
/*%%%*/
value_expr($5);
if ($4 == tOROP) {
$4 = 0;
}
else if ($4 == tANDOP) {
$4 = 1;
}
$$ = NEW_OP_ASGN2($1, $3, $4, $5);
fixpos($$, $1);
/*%
$$ = dispatch3(field, $1, ripper_id2sym('.'), $3);
$$ = dispatch3(opassign, $$, $4, $5);
%*/
}
| primary_value '.' tCONSTANT tOP_ASGN command_call
{
/*%%%*/
value_expr($5);
if ($4 == tOROP) {
$4 = 0;
}
else if ($4 == tANDOP) {
$4 = 1;
}
$$ = NEW_OP_ASGN2($1, $3, $4, $5);
fixpos($$, $1);
/*%
$$ = dispatch3(field, $1, ripper_id2sym('.'), $3);
$$ = dispatch3(opassign, $$, $4, $5);
%*/
}
| primary_value tCOLON2 tIDENTIFIER tOP_ASGN command_call
{
/*%%%*/
value_expr($5);
if ($4 == tOROP) {
$4 = 0;
}
else if ($4 == tANDOP) {
$4 = 1;
}
$$ = NEW_OP_ASGN2($1, $3, $4, $5);
fixpos($$, $1);
/*%
$$ = dispatch3(field, $1, ripper_intern("::"), $3);
$$ = dispatch3(opassign, $$, $4, $5);
%*/
}
| backref tOP_ASGN command_call
{
/*%%%*/
rb_backref_error($1);
$$ = 0;
/*%
$$ = dispatch2(assign, dispatch1(var_field, $1), $3);
$$ = dispatch1(assign_error, $$);
%*/
}
| lhs '=' mrhs
{
/*%%%*/
$$ = node_assign($1, NEW_SVALUE($3));
/*%
$$ = dispatch2(assign, $1, $3);
%*/
}
| mlhs '=' arg_value
{
/*%%%*/
$1->nd_value = ($1->nd_head) ? NEW_TO_ARY($3) : NEW_ARRAY($3);