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parse.y
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parse.y
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/**********************************************************************
parse.y -
$Author$
created at: Fri May 28 18:02:42 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
**********************************************************************/
%{
#ifndef PARSER_DEBUG
#define PARSER_DEBUG 0
#endif
#define YYDEBUG 1
#define YYERROR_VERBOSE 1
#define YYSTACK_USE_ALLOCA 0
#include "ruby/ruby.h"
#include "ruby/st.h"
#include "ruby/encoding.h"
#include "internal.h"
#include "node.h"
#include "parse.h"
#include "symbol.h"
#include "regenc.h"
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include "probes.h"
#define YYMALLOC(size) rb_parser_malloc(parser, (size))
#define YYREALLOC(ptr, size) rb_parser_realloc(parser, (ptr), (size))
#define YYCALLOC(nelem, size) rb_parser_calloc(parser, (nelem), (size))
#define YYFREE(ptr) rb_parser_free(parser, (ptr))
#undef malloc
#undef realloc
#undef calloc
#undef free
#define malloc YYMALLOC
#define realloc YYREALLOC
#define calloc YYCALLOC
#define free YYFREE
enum lex_state_bits {
EXPR_BEG_bit, /* ignore newline, +/- is a sign. */
EXPR_END_bit, /* newline significant, +/- is an operator. */
EXPR_ENDARG_bit, /* ditto, and unbound braces. */
EXPR_ENDFN_bit, /* ditto, and unbound braces. */
EXPR_ARG_bit, /* newline significant, +/- is an operator. */
EXPR_CMDARG_bit, /* newline significant, +/- is an operator. */
EXPR_MID_bit, /* newline significant, +/- is an operator. */
EXPR_FNAME_bit, /* ignore newline, no reserved words. */
EXPR_DOT_bit, /* right after `.' or `::', no reserved words. */
EXPR_CLASS_bit, /* immediate after `class', no here document. */
EXPR_VALUE_bit, /* alike EXPR_BEG but label is disallowed. */
EXPR_LABELARG_bit, /* ignore significant, +/- is a sign. */
EXPR_MAX_STATE
};
/* examine combinations */
enum lex_state_e {
#define DEF_EXPR(n) EXPR_##n = (1 << EXPR_##n##_bit)
DEF_EXPR(BEG),
DEF_EXPR(END),
DEF_EXPR(ENDARG),
DEF_EXPR(ENDFN),
DEF_EXPR(ARG),
DEF_EXPR(CMDARG),
DEF_EXPR(MID),
DEF_EXPR(FNAME),
DEF_EXPR(DOT),
DEF_EXPR(CLASS),
DEF_EXPR(VALUE),
DEF_EXPR(LABELARG),
EXPR_BEG_ANY = (EXPR_BEG | EXPR_VALUE | EXPR_MID | EXPR_CLASS | EXPR_LABELARG),
EXPR_ARG_ANY = (EXPR_ARG | EXPR_CMDARG),
EXPR_END_ANY = (EXPR_END | EXPR_ENDARG | EXPR_ENDFN)
};
#define IS_lex_state_for(x, ls) ((x) & (ls))
#define IS_lex_state(ls) IS_lex_state_for(lex_state, (ls))
#if PARSER_DEBUG
static const char *lex_state_name(enum lex_state_e state);
#endif
typedef VALUE stack_type;
# 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)
struct vtable {
ID *tbl;
int pos;
int capa;
struct vtable *prev;
};
struct local_vars {
struct vtable *args;
struct vtable *vars;
struct vtable *used;
struct local_vars *prev;
stack_type cmdargs;
};
#define DVARS_INHERIT ((void*)1)
#define DVARS_TOPSCOPE NULL
#define DVARS_SPECIAL_P(tbl) (!POINTER_P(tbl))
#define POINTER_P(val) ((VALUE)(val) & ~(VALUE)3)
static int
vtable_size(const struct vtable *tbl)
{
if (POINTER_P(tbl)) {
return tbl->pos;
}
else {
return 0;
}
}
#define VTBL_DEBUG 0
static struct vtable *
vtable_alloc(struct vtable *prev)
{
struct vtable *tbl = ALLOC(struct vtable);
tbl->pos = 0;
tbl->capa = 8;
tbl->tbl = ALLOC_N(ID, tbl->capa);
tbl->prev = prev;
if (VTBL_DEBUG) printf("vtable_alloc: %p\n", (void *)tbl);
return tbl;
}
static void
vtable_free(struct vtable *tbl)
{
if (VTBL_DEBUG)printf("vtable_free: %p\n", (void *)tbl);
if (POINTER_P(tbl)) {
if (tbl->tbl) {
xfree(tbl->tbl);
}
xfree(tbl);
}
}
static void
vtable_add(struct vtable *tbl, ID id)
{
if (!POINTER_P(tbl)) {
rb_bug("vtable_add: vtable is not allocated (%p)", (void *)tbl);
}
if (VTBL_DEBUG) printf("vtable_add: %p, %"PRIsVALUE"\n", (void *)tbl, rb_id2str(id));
if (tbl->pos == tbl->capa) {
tbl->capa = tbl->capa * 2;
REALLOC_N(tbl->tbl, ID, tbl->capa);
}
tbl->tbl[tbl->pos++] = id;
}
#ifndef RIPPER
static void
vtable_pop(struct vtable *tbl, int n)
{
if (tbl->pos < n) rb_bug("vtable_pop: unreachable");
tbl->pos -= n;
}
#endif
static int
vtable_included(const struct vtable * tbl, ID id)
{
int i;
if (POINTER_P(tbl)) {
for (i = 0; i < tbl->pos; i++) {
if (tbl->tbl[i] == id) {
return i+1;
}
}
}
return 0;
}
#ifndef RIPPER
typedef struct token_info {
const char *token;
int linenum;
int column;
int nonspc;
struct token_info *next;
} token_info;
#endif
/*
Structure of Lexer Buffer:
lex_pbeg tokp lex_p lex_pend
| | | |
|-----------+--------------+------------|
|<------------>|
token
*/
struct parser_params {
NODE *heap;
YYSTYPE *parser_yylval;
VALUE eofp;
NODE *parser_lex_strterm;
stack_type parser_cond_stack;
stack_type parser_cmdarg_stack;
enum lex_state_e parser_lex_state;
int parser_paren_nest;
int parser_lpar_beg;
int parser_in_single;
int parser_in_def;
int parser_brace_nest;
int parser_compile_for_eval;
int parser_in_kwarg;
int parser_in_defined;
char *parser_tokenbuf;
int parser_tokidx;
int parser_toksiz;
int parser_tokline;
int is_ripper; /* bool, seems unused */
VALUE parser_lex_input;
VALUE parser_lex_lastline;
VALUE parser_lex_nextline;
const char *parser_lex_pbeg;
const char *parser_lex_p;
const char *parser_lex_pend;
int parser_heredoc_end;
int parser_command_start;
NODE *parser_deferred_nodes;
long parser_lex_gets_ptr;
VALUE (*parser_lex_gets)(struct parser_params*,VALUE);
struct local_vars *parser_lvtbl;
int parser_ruby__end__seen;
int line_count;
int has_shebang;
int parser_ruby_sourceline; /* current line no. */
char *parser_ruby_sourcefile; /* current source file */
VALUE parser_ruby_sourcefile_string;
rb_encoding *enc;
int parser_yydebug;
int last_cr_line;
ID cur_arg;
#ifndef RIPPER
/* Ruby core only */
NODE *parser_eval_tree_begin;
NODE *parser_eval_tree;
VALUE debug_lines;
VALUE coverage;
int nerr;
int parser_token_info_enabled;
token_info *parser_token_info;
#else
/* Ripper only */
const char *tokp;
VALUE delayed;
int delayed_line;
int delayed_col;
VALUE value;
VALUE result;
VALUE parsing_thread;
int toplevel_p;
int error_p;
#endif
};
#ifdef RIPPER
#define intern_cstr(n,l,en) rb_intern3(n,l,en)
#else
#define intern_cstr(n,l,en) rb_intern3(n,l,en)
#endif
#define STR_NEW(p,n) rb_enc_str_new((p),(n),current_enc)
#define STR_NEW0() rb_enc_str_new(0,0,current_enc)
#define STR_NEW2(p) rb_enc_str_new((p),strlen(p),current_enc)
#define STR_NEW3(p,n,e,func) parser_str_new((p),(n),(e),(func),current_enc)
#define TOK_INTERN() intern_cstr(tok(), toklen(), current_enc)
static int parser_yyerror(struct parser_params*, const char*);
#define yyerror(msg) parser_yyerror(parser, (msg))
#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 paren_nest (parser->parser_paren_nest)
#define lpar_beg (parser->parser_lpar_beg)
#define brace_nest (parser->parser_brace_nest)
#define in_single (parser->parser_in_single)
#define in_def (parser->parser_in_def)
#define compile_for_eval (parser->parser_compile_for_eval)
#define in_defined (parser->parser_in_defined)
#define tokenbuf (parser->parser_tokenbuf)
#define tokidx (parser->parser_tokidx)
#define toksiz (parser->parser_toksiz)
#define tokline (parser->parser_tokline)
#define lex_input (parser->parser_lex_input)
#define lex_lastline (parser->parser_lex_lastline)
#define lex_nextline (parser->parser_lex_nextline)
#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 deferred_nodes (parser->parser_deferred_nodes)
#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)
#define ruby_sourceline (parser->parser_ruby_sourceline)
#define ruby_sourcefile (parser->parser_ruby_sourcefile)
#define ruby_sourcefile_string (parser->parser_ruby_sourcefile_string)
#define current_enc (parser->enc)
#define current_arg (parser->cur_arg)
#define yydebug (parser->parser_yydebug)
#ifdef RIPPER
#else
#define ruby_eval_tree (parser->parser_eval_tree)
#define ruby_eval_tree_begin (parser->parser_eval_tree_begin)
#define ruby_debug_lines (parser->debug_lines)
#define ruby_coverage (parser->coverage)
#endif
#if YYPURE
static int yylex(void*, void*);
#else
static int yylex(void*);
#endif
#ifndef RIPPER
#define yyparse ruby_yyparse
static NODE* node_newnode(struct parser_params *, enum node_type, VALUE, VALUE, VALUE);
#define rb_node_newnode(type, a1, a2, a3) node_newnode(parser, (type), (a1), (a2), (a3))
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 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*);
static NODE *remove_begin_all(NODE*);
#define value_expr(node) value_expr_gen(parser, (node) = remove_begin(node))
#define void_expr0(node) void_expr_gen(parser, (node))
#define void_expr(node) void_expr0((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_gen(struct parser_params*,NODE**);
#define reduce_nodes(n) reduce_nodes_gen(parser,(n))
static void block_dup_check_gen(struct parser_params*,NODE*,NODE*);
#define block_dup_check(n1,n2) block_dup_check_gen(parser,(n1),(n2))
static NODE *block_append_gen(struct parser_params*,NODE*,NODE*);
#define block_append(h,t) block_append_gen(parser,(h),(t))
static NODE *list_append_gen(struct parser_params*,NODE*,NODE*);
#define list_append(l,i) list_append_gen(parser,(l),(i))
static NODE *list_concat(NODE*,NODE*);
static NODE *arg_append_gen(struct parser_params*,NODE*,NODE*);
#define arg_append(h,t) arg_append_gen(parser,(h),(t))
static NODE *arg_concat_gen(struct parser_params*,NODE*,NODE*);
#define arg_concat(h,t) arg_concat_gen(parser,(h),(t))
static NODE *literal_concat_gen(struct parser_params*,NODE*,NODE*);
#define literal_concat(h,t) literal_concat_gen(parser,(h),(t))
static int literal_concat0(struct parser_params *, VALUE, VALUE);
static NODE *new_evstr_gen(struct parser_params*,NODE*);
#define new_evstr(n) new_evstr_gen(parser,(n))
static NODE *evstr2dstr_gen(struct parser_params*,NODE*);
#define evstr2dstr(n) evstr2dstr_gen(parser,(n))
static NODE *splat_array(NODE*);
static NODE *call_bin_op_gen(struct parser_params*,NODE*,ID,NODE*);
#define call_bin_op(recv,id,arg1) call_bin_op_gen(parser, (recv),(id),(arg1))
static NODE *call_uni_op_gen(struct parser_params*,NODE*,ID);
#define call_uni_op(recv,id) call_uni_op_gen(parser, (recv),(id))
static NODE *new_args_gen(struct parser_params*,NODE*,NODE*,ID,NODE*,NODE*);
#define new_args(f,o,r,p,t) new_args_gen(parser, (f),(o),(r),(p),(t))
static NODE *new_args_tail_gen(struct parser_params*,NODE*,ID,ID);
#define new_args_tail(k,kr,b) new_args_tail_gen(parser, (k),(kr),(b))
static VALUE negate_lit(VALUE);
static NODE *ret_args_gen(struct parser_params*,NODE*);
#define ret_args(node) ret_args_gen(parser, (node))
static NODE *arg_blk_pass(NODE*,NODE*);
static NODE *new_yield_gen(struct parser_params*,NODE*);
#define new_yield(node) new_yield_gen(parser, (node))
static NODE *dsym_node_gen(struct parser_params*,NODE*);
#define dsym_node(node) dsym_node_gen(parser, (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 *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_gen(struct parser_params*,NODE*);
#define rb_backref_error(n) rb_backref_error_gen(parser,(n))
static NODE *node_assign_gen(struct parser_params*,NODE*,NODE*);
#define node_assign(node1, node2) node_assign_gen(parser, (node1), (node2))
static NODE *new_op_assign_gen(struct parser_params *parser, NODE *lhs, ID op, NODE *rhs);
static NODE *new_attr_op_assign_gen(struct parser_params *parser, NODE *lhs, ID attr, ID op, NODE *rhs);
#define new_attr_op_assign(lhs, type, attr, op, rhs) new_attr_op_assign_gen(parser, (lhs), (attr), (op), (rhs))
static NODE *new_const_op_assign_gen(struct parser_params *parser, NODE *lhs, ID op, NODE *rhs);
#define new_const_op_assign(lhs, op, rhs) new_const_op_assign_gen(parser, (lhs), (op), (rhs))
static NODE *new_hash_gen(struct parser_params *parser, NODE *hash);
#define new_hash(hash) new_hash_gen(parser, (hash))
#define new_defined(expr) NEW_DEFINED(remove_begin_all(expr))
static NODE *match_op_gen(struct parser_params*,NODE*,NODE*);
#define match_op(node1,node2) match_op_gen(parser, (node1), (node2))
static ID *local_tbl_gen(struct parser_params*);
#define local_tbl() local_tbl_gen(parser)
static void fixup_nodes(NODE **);
static VALUE reg_compile_gen(struct parser_params*, VALUE, int);
#define reg_compile(str,options) reg_compile_gen(parser, (str), (options))
static void reg_fragment_setenc_gen(struct parser_params*, VALUE, int);
#define reg_fragment_setenc(str,options) reg_fragment_setenc_gen(parser, (str), (options))
static int reg_fragment_check_gen(struct parser_params*, VALUE, int);
#define reg_fragment_check(str,options) reg_fragment_check_gen(parser, (str), (options))
static NODE *reg_named_capture_assign_gen(struct parser_params* parser, VALUE regexp, NODE *match);
#define reg_named_capture_assign(regexp,match) reg_named_capture_assign_gen(parser,(regexp),(match))
#define get_id(id) (id)
#define get_value(val) (val)
#else
#define value_expr(node) ((void)(node))
#define remove_begin(node) (node)
#define rb_dvar_defined(id) 0
#define rb_local_defined(id) 0
static ID ripper_get_id(VALUE);
#define get_id(id) ripper_get_id(id)
static VALUE ripper_get_value(VALUE);
#define get_value(val) ripper_get_value(val)
static VALUE assignable_gen(struct parser_params*,VALUE);
#define assignable(lhs,node) assignable_gen(parser, (lhs))
static int id_is_var_gen(struct parser_params *parser, ID id);
#define id_is_var(id) id_is_var_gen(parser, (id))
#define node_assign(node1, node2) dispatch2(assign, (node1), (node2))
static VALUE new_op_assign_gen(struct parser_params *parser, VALUE lhs, VALUE op, VALUE rhs);
static VALUE new_attr_op_assign_gen(struct parser_params *parser, VALUE lhs, VALUE type, VALUE attr, VALUE op, VALUE rhs);
#define new_attr_op_assign(lhs, type, attr, op, rhs) new_attr_op_assign_gen(parser, (lhs), (type), (attr), (op), (rhs))
#endif /* !RIPPER */
#define new_op_assign(lhs, op, rhs) new_op_assign_gen(parser, (lhs), (op), (rhs))
static ID formal_argument_gen(struct parser_params*, ID);
#define formal_argument(id) formal_argument_gen(parser, (id))
static ID shadowing_lvar_gen(struct parser_params*,ID);
#define shadowing_lvar(name) shadowing_lvar_gen(parser, (name))
static void new_bv_gen(struct parser_params*,ID);
#define new_bv(id) new_bv_gen(parser, (id))
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 void local_var_gen(struct parser_params*, ID);
#define local_var(id) local_var_gen(parser, (id))
static void arg_var_gen(struct parser_params*, ID);
#define arg_var(id) arg_var_gen(parser, (id))
static int local_id_gen(struct parser_params*, ID);
#define local_id(id) local_id_gen(parser, (id))
static ID internal_id_gen(struct parser_params*);
#define internal_id() internal_id_gen(parser)
static const struct vtable *dyna_push_gen(struct parser_params *);
#define dyna_push() dyna_push_gen(parser)
static void dyna_pop_gen(struct parser_params*, const struct vtable *);
#define dyna_pop(node) dyna_pop_gen(parser, (node))
static int dyna_in_block_gen(struct parser_params*);
#define dyna_in_block() dyna_in_block_gen(parser)
#define dyna_var(id) local_var(id)
static int dvar_defined_gen(struct parser_params*,ID,int);
#define dvar_defined(id) dvar_defined_gen(parser, (id), 0)
#define dvar_defined_get(id) dvar_defined_gen(parser, (id), 1)
static int dvar_curr_gen(struct parser_params*,ID);
#define dvar_curr(id) dvar_curr_gen(parser, (id))
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 RE_OPTION_ENCODING_SHIFT 8
#define RE_OPTION_ENCODING(e) (((e)&0xff)<<RE_OPTION_ENCODING_SHIFT)
#define RE_OPTION_ENCODING_IDX(o) (((o)>>RE_OPTION_ENCODING_SHIFT)&0xff)
#define RE_OPTION_ENCODING_NONE(o) ((o)&RE_OPTION_ARG_ENCODING_NONE)
#define RE_OPTION_MASK 0xff
#define RE_OPTION_ARG_ENCODING_NONE 32
#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"
static inline VALUE intern_sym(const char *name);
#include "eventids1.c"
#include "eventids2.c"
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);
static VALUE ripper_dispatch7(struct parser_params*,ID,VALUE,VALUE,VALUE,VALUE,VALUE,VALUE,VALUE);
static void ripper_error_gen(struct parser_params *parser);
#define ripper_error() ripper_error_gen(parser)
#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 dispatch7(n,a,b,c,d,e,f,g) ripper_dispatch7(parser, TOKEN_PASTE(ripper_id_, n), (a), (b), (c), (d), (e), (f), (g))
#define yyparse ripper_yyparse
#define ripper_intern(s) ID2SYM(rb_intern(s))
static VALUE ripper_id2sym(ID);
#ifdef __GNUC__
#define ripper_id2sym(id) ((id) < 256 && rb_ispunct(id) ? \
ID2SYM(id) : ripper_id2sym(id))
#endif
#define arg_new() dispatch0(args_new)
#define arg_add(l,a) dispatch2(args_add, (l), (a))
#define arg_add_star(l,a) dispatch2(args_add_star, (l), (a))
#define arg_add_block(l,b) dispatch2(args_add_block, (l), (b))
#define arg_add_optblock(l,b) ((b)==Qundef? (l) : dispatch2(args_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_args, (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 params_new(pars, opts, rest, pars2, kws, kwrest, blk) \
dispatch7(params, (pars), (opts), (rest), (pars2), (kws), (kwrest), (blk))
#define blockvar_new(p,v) dispatch2(block_var, (p), (v))
#define blockvar_add_star(l,a) dispatch2(block_var_add_star, (l), (a))
#define blockvar_add_block(l,a) dispatch2(block_var_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 method_add_block(m,b) dispatch2(method_add_block, (m), (b))
#define escape_Qundef(x) ((x)==Qundef ? Qnil : (x))
static inline VALUE
new_args_gen(struct parser_params *parser, VALUE f, VALUE o, VALUE r, VALUE p, VALUE tail)
{
NODE *t = (NODE *)tail;
VALUE k = t->u1.value, kr = t->u2.value, b = t->u3.value;
return params_new(f, o, r, p, k, kr, escape_Qundef(b));
}
#define new_args(f,o,r,p,t) new_args_gen(parser, (f),(o),(r),(p),(t))
static inline VALUE
new_args_tail_gen(struct parser_params *parser, VALUE k, VALUE kr, VALUE b)
{
return (VALUE)rb_node_newnode(NODE_MEMO, k, kr, b);
}
#define new_args_tail(k,kr,b) new_args_tail_gen(parser, (k),(kr),(b))
#define new_defined(expr) dispatch1(defined, (expr))
#define FIXME 0
#endif /* RIPPER */
#ifndef RIPPER
# define Qnone 0
# define ifndef_ripper(x) (x)
#else
# define Qnone Qnil
# define ifndef_ripper(x)
#endif
#ifndef RIPPER
# define rb_warn0(fmt) rb_compile_warn(ruby_sourcefile, ruby_sourceline, (fmt))
# define rb_warnI(fmt,a) rb_compile_warn(ruby_sourcefile, ruby_sourceline, (fmt), (a))
# define rb_warnS(fmt,a) rb_compile_warn(ruby_sourcefile, ruby_sourceline, (fmt), (a))
# define rb_warnV(fmt,a) rb_compile_warn(ruby_sourcefile, ruby_sourceline, (fmt), (a))
# define rb_warn4S(file,line,fmt,a) rb_compile_warn((file), (line), (fmt), (a))
# define rb_warn4V(file,line,fmt,a) rb_compile_warn((file), (line), (fmt), (a))
# define rb_warning0(fmt) rb_compile_warning(ruby_sourcefile, ruby_sourceline, (fmt))
# define rb_warningS(fmt,a) rb_compile_warning(ruby_sourcefile, ruby_sourceline, (fmt), (a))
# define rb_warningV(fmt,a) rb_compile_warning(ruby_sourcefile, ruby_sourceline, (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_warnV(fmt,a) ripper_warnV(parser, (fmt), (a))
# define rb_warn4S(file,line,fmt,a) ripper_warnS(parser, (fmt), (a))
# define rb_warn4V(file,line,fmt,a) ripper_warnV(parser, (fmt), (a))
# define rb_warning0(fmt) ripper_warning0(parser, (fmt))
# define rb_warningS(fmt,a) ripper_warningS(parser, (fmt), (a))
# define rb_warningV(fmt,a) ripper_warningV(parser, (fmt), (a))
static void ripper_warn0(struct parser_params*, const char*);
static void ripper_warnI(struct parser_params*, const char*, int);
#if 0 /* not in use right now */
static void ripper_warnS(struct parser_params*, const char*, const char*);
#endif
static void ripper_warnV(struct parser_params*, const char*, VALUE);
static void ripper_warning0(struct parser_params*, const char*);
static void ripper_warningS(struct parser_params*, const char*, const char*);
static void ripper_warningV(struct parser_params*, const char*, VALUE);
#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 rb_compile_error rb_compile_error_with_enc
# define compile_error parser->nerr++,rb_compile_error_with_enc
# define PARSER_ARG ruby_sourcefile, ruby_sourceline, (void *)current_enc,
#endif
/* 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
#ifndef RIPPER
static void token_info_push(struct parser_params*, const char *token);
static void token_info_pop(struct parser_params*, const char *token);
#define token_info_push(token) (RTEST(ruby_verbose) ? token_info_push(parser, (token)) : (void)0)
#define token_info_pop(token) (RTEST(ruby_verbose) ? token_info_pop(parser, (token)) : (void)0)
#else
#define token_info_push(token) /* nothing */
#define token_info_pop(token) /* nothing */
#endif
%}
%pure-parser
%lex-param {struct parser_params *parser}
%parse-param {struct parser_params *parser}
%union {
VALUE val;
NODE *node;
ID id;
int num;
const struct vtable *vars;
}
/*%%%*/
%token
/*%
%token <val>
%*/
keyword_class
keyword_module
keyword_def
keyword_undef
keyword_begin
keyword_rescue
keyword_ensure
keyword_end
keyword_if
keyword_unless
keyword_then
keyword_elsif
keyword_else
keyword_case
keyword_when
keyword_while
keyword_until
keyword_for
keyword_break
keyword_next
keyword_redo
keyword_retry
keyword_in
keyword_do
keyword_do_cond
keyword_do_block
keyword_do_LAMBDA
keyword_return
keyword_yield
keyword_super
keyword_self
keyword_nil
keyword_true
keyword_false
keyword_and
keyword_or
keyword_not
modifier_if
modifier_unless
modifier_while
modifier_until
modifier_rescue
keyword_alias
keyword_defined
keyword_BEGIN
keyword_END
keyword__LINE__
keyword__FILE__
keyword__ENCODING__
%token <id> tIDENTIFIER tFID tGVAR tIVAR tCONSTANT tCVAR tLABEL
%token <node> tINTEGER tFLOAT tRATIONAL tIMAGINARY tSTRING_CONTENT tCHAR
%token <node> tNTH_REF tBACK_REF
%token <num> tREGEXP_END
%type <node> singleton strings string string1 xstring regexp
%type <node> string_contents xstring_contents regexp_contents string_content
%type <node> words symbols symbol_list qwords qsymbols word_list qword_list qsym_list word
%type <node> literal numeric simple_numeric dsym cpath
%type <node> top_compstmt top_stmts top_stmt
%type <node> bodystmt compstmt stmts stmt_or_begin stmt expr arg primary command command_call method_call
%type <node> expr_value arg_value primary_value fcall
%type <node> if_tail opt_else case_body cases opt_rescue exc_list exc_var opt_ensure
%type <node> args call_args opt_call_args
%type <node> paren_args opt_paren_args args_tail opt_args_tail block_args_tail opt_block_args_tail
%type <node> command_args aref_args opt_block_arg block_arg var_ref var_lhs
%type <node> command_asgn mrhs mrhs_arg superclass block_call block_command
%type <node> f_block_optarg f_block_opt
%type <node> f_arglist f_args f_arg f_arg_item f_optarg f_marg f_marg_list f_margs
%type <node> assoc_list assocs assoc undef_list backref string_dvar for_var
%type <node> block_param opt_block_param block_param_def f_opt
%type <node> f_kwarg f_kw f_block_kwarg f_block_kw
%type <node> bv_decls opt_bv_decl bvar
%type <node> 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_item mlhs_node mlhs_post mlhs_inner
%type <id> fsym keyword_variable user_variable sym symbol operation operation2 operation3
%type <id> cname fname op f_rest_arg f_block_arg opt_f_block_arg f_norm_arg f_bad_arg
%type <id> f_kwrest f_label f_arg_asgn
/*%%%*/
/*%
%type <val> program reswords then do dot_or_colon
%*/
%token END_OF_INPUT 0 "end-of-input"
%token tUPLUS RUBY_TOKEN(UPLUS) "unary+"
%token tUMINUS RUBY_TOKEN(UMINUS) "unary-"
%token tPOW RUBY_TOKEN(POW) "**"
%token tCMP RUBY_TOKEN(CMP) "<=>"
%token tEQ RUBY_TOKEN(EQ) "=="
%token tEQQ RUBY_TOKEN(EQQ) "==="
%token tNEQ RUBY_TOKEN(NEQ) "!="
%token tGEQ RUBY_TOKEN(GEQ) ">="
%token tLEQ RUBY_TOKEN(LEQ) "<="
%token tANDOP RUBY_TOKEN(ANDOP) "&&"
%token tOROP RUBY_TOKEN(OROP) "||"
%token tMATCH RUBY_TOKEN(MATCH) "=~"
%token tNMATCH RUBY_TOKEN(NMATCH) "!~"
%token tDOT2 RUBY_TOKEN(DOT2) ".."
%token tDOT3 RUBY_TOKEN(DOT3) "..."
%token tAREF RUBY_TOKEN(AREF) "[]"
%token tASET RUBY_TOKEN(ASET) "[]="
%token tLSHFT RUBY_TOKEN(LSHFT) "<<"
%token tRSHFT RUBY_TOKEN(RSHFT) ">>"
%token tCOLON2 "::"
%token tCOLON3 ":: at EXPR_BEG"
%token <id> tOP_ASGN /* +=, -= etc. */
%token tASSOC "=>"
%token tLPAREN "("
%token tLPAREN_ARG "( arg"
%token tRPAREN ")"
%token tLBRACK "["
%token tLBRACE "{"
%token tLBRACE_ARG "{ arg"
%token tSTAR "*"
%token tDSTAR "**arg"
%token tAMPER "&"
%token tLAMBDA "->"
%token tSYMBEG tSTRING_BEG tXSTRING_BEG tREGEXP_BEG tWORDS_BEG tQWORDS_BEG tSYMBOLS_BEG tQSYMBOLS_BEG
%token tSTRING_DBEG tSTRING_DEND tSTRING_DVAR tSTRING_END tLAMBEG tLABEL_END
/*
* precedence table
*/
%nonassoc tLOWEST
%nonassoc tLBRACE_ARG
%nonassoc modifier_if modifier_unless modifier_while modifier_until
%left keyword_or keyword_and
%right keyword_not
%nonassoc keyword_defined
%right '=' tOP_ASGN
%left modifier_rescue
%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;
/*%%%*/
local_push(compile_for_eval || rb_parse_in_main());
/*%
local_push(0);
%*/
}
top_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 = NEW_SCOPE(0, block_append(ruby_eval_tree, $2));
/*%
$$ = $2;
parser->result = dispatch1(program, $$);
%*/
local_pop();
}
;
top_compstmt : top_stmts opt_terms
{
/*%%%*/
void_stmts($1);
fixup_nodes(&deferred_nodes);
/*%
%*/
$$ = $1;
}
;
top_stmts : none
{
/*%%%*/
$$ = NEW_BEGIN(0);
/*%
$$ = dispatch2(stmts_add, dispatch0(stmts_new),
dispatch0(void_stmt));
%*/
}
| top_stmt
{
/*%%%*/
$$ = newline_node($1);
/*%
$$ = dispatch2(stmts_add, dispatch0(stmts_new), $1);
%*/
}
| top_stmts terms top_stmt
{
/*%%%*/
$$ = block_append($1, newline_node($3));
/*%
$$ = dispatch2(stmts_add, $1, $3);
%*/
}
| error top_stmt
{
$$ = remove_begin($2);
}
;
top_stmt : stmt
| keyword_BEGIN
{
/*%%%*/
/* local_push(0); */
/*%
%*/
}
'{' top_compstmt '}'
{
/*%%%*/
ruby_eval_tree_begin = block_append(ruby_eval_tree_begin,
$4);
/* NEW_PREEXE($4)); */
/* local_pop(); */
$$ = NEW_BEGIN(0);
/*%
$$ = dispatch1(BEGIN, $4);
%*/
}
;
bodystmt : compstmt
opt_rescue
opt_else
opt_ensure
{
/*%%%*/
$$ = $1;
if ($2) {
$$ = NEW_RESCUE($1, $2, $3);
}
else if ($3) {
rb_warn0("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));
%*/
}