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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
**********************************************************************/
%require "3.0"
%{
#if !YYPURE
# error needs pure parser
#endif
#define YYDEBUG 1
#define YYERROR_VERBOSE 1
#define YYSTACK_USE_ALLOCA 0
#define YYLTYPE rb_code_location_t
#define YYLTYPE_IS_DECLARED 1
/* For Ripper */
#ifdef RUBY_EXTCONF_H
# include RUBY_EXTCONF_H
#endif
#include "ruby/internal/config.h"
#include <errno.h>
#ifdef UNIVERSAL_PARSER
#include "internal/ruby_parser.h"
#include "parser_node.h"
#include "universal_parser.c"
#ifdef RIPPER
#undef T_NODE
#define T_NODE 0x1b
#define STATIC_ID2SYM p->config->static_id2sym
#define rb_str_coderange_scan_restartable p->config->str_coderange_scan_restartable
#endif
#else
#include "internal.h"
#include "internal/compile.h"
#include "internal/compilers.h"
#include "internal/complex.h"
#include "internal/encoding.h"
#include "internal/error.h"
#include "internal/hash.h"
#include "internal/imemo.h"
#include "internal/io.h"
#include "internal/numeric.h"
#include "internal/parse.h"
#include "internal/rational.h"
#include "internal/re.h"
#include "internal/ruby_parser.h"
#include "internal/symbol.h"
#include "internal/thread.h"
#include "internal/variable.h"
#include "node.h"
#include "parser_node.h"
#include "probes.h"
#include "regenc.h"
#include "ruby/encoding.h"
#include "ruby/regex.h"
#include "ruby/ruby.h"
#include "ruby/st.h"
#include "ruby/util.h"
#include "ruby/ractor.h"
#include "symbol.h"
#ifndef RIPPER
static bool
hash_literal_key_p(VALUE k)
{
switch (OBJ_BUILTIN_TYPE(k)) {
case T_NODE:
switch (nd_type(RNODE(k))) {
case NODE_INTEGER:
case NODE_FLOAT:
case NODE_RATIONAL:
case NODE_IMAGINARY:
case NODE_STR:
case NODE_SYM:
case NODE_LINE:
case NODE_FILE:
case NODE_ENCODING:
return true;
default:
return false;
}
default:
return true;
}
}
static int rb_parser_string_hash_cmp(rb_parser_string_t *str1, rb_parser_string_t *str2);
static int
node_integer_cmp(rb_node_integer_t *n1, rb_node_integer_t *n2)
{
return (n1->minus != n2->minus ||
n1->base != n2->base ||
strcmp(n1->val, n2->val));
}
static int
node_float_cmp(rb_node_float_t *n1, rb_node_float_t *n2)
{
return (n1->minus != n2->minus ||
strcmp(n1->val, n2->val));
}
static int
node_rational_cmp(rb_node_rational_t *n1, rb_node_rational_t *n2)
{
return (n1->minus != n2->minus ||
n1->base != n2->base ||
n1->seen_point != n2->seen_point ||
strcmp(n1->val, n2->val));
}
static int
node_imaginary_cmp(rb_node_imaginary_t *n1, rb_node_imaginary_t *n2)
{
return (n1->minus != n2->minus ||
n1->base != n2->base ||
n1->seen_point != n2->seen_point ||
n1->type != n2->type ||
strcmp(n1->val, n2->val));
}
static int
node_integer_line_cmp(const NODE *node_i, const NODE *line)
{
VALUE num = rb_node_integer_literal_val(node_i);
return !(FIXNUM_P(num) && line->nd_loc.beg_pos.lineno == FIX2INT(num));
}
static int
node_cdhash_cmp(VALUE val, VALUE lit)
{
if (val == lit) {
return 0;
}
if ((OBJ_BUILTIN_TYPE(val) == T_NODE) && (OBJ_BUILTIN_TYPE(lit) == T_NODE)) {
NODE *node_val = RNODE(val);
NODE *node_lit = RNODE(lit);
enum node_type type_val = nd_type(node_val);
enum node_type type_lit = nd_type(node_lit);
/* Special case for Integer and __LINE__ */
if (type_val == NODE_INTEGER && type_lit == NODE_LINE) {
return node_integer_line_cmp(node_val, node_lit);
}
if (type_lit == NODE_INTEGER && type_val == NODE_LINE) {
return node_integer_line_cmp(node_lit, node_val);
}
/* Special case for String and __FILE__ */
if (type_val == NODE_STR && type_lit == NODE_FILE) {
return rb_parser_string_hash_cmp(RNODE_STR(node_val)->string, RNODE_FILE(node_lit)->path);
}
if (type_lit == NODE_STR && type_val == NODE_FILE) {
return rb_parser_string_hash_cmp(RNODE_STR(node_lit)->string, RNODE_FILE(node_val)->path);
}
if (type_val != type_lit) {
return -1;
}
switch (type_lit) {
case NODE_INTEGER:
return node_integer_cmp(RNODE_INTEGER(node_val), RNODE_INTEGER(node_lit));
case NODE_FLOAT:
return node_float_cmp(RNODE_FLOAT(node_val), RNODE_FLOAT(node_lit));
case NODE_RATIONAL:
return node_rational_cmp(RNODE_RATIONAL(node_val), RNODE_RATIONAL(node_lit));
case NODE_IMAGINARY:
return node_imaginary_cmp(RNODE_IMAGINARY(node_val), RNODE_IMAGINARY(node_lit));
case NODE_STR:
return rb_parser_string_hash_cmp(RNODE_STR(node_val)->string, RNODE_STR(node_lit)->string);
case NODE_SYM:
return rb_parser_string_hash_cmp(RNODE_SYM(node_val)->string, RNODE_SYM(node_lit)->string);
case NODE_LINE:
return node_val->nd_loc.beg_pos.lineno != node_lit->nd_loc.beg_pos.lineno;
case NODE_FILE:
return rb_parser_string_hash_cmp(RNODE_FILE(node_val)->path, RNODE_FILE(node_lit)->path);
case NODE_ENCODING:
return RNODE_ENCODING(node_val)->enc != RNODE_ENCODING(node_lit)->enc;
default:
rb_bug("unexpected node: %s, %s", ruby_node_name(type_val), ruby_node_name(type_lit));
}
}
else if ((OBJ_BUILTIN_TYPE(val) == T_NODE) || (OBJ_BUILTIN_TYPE(lit) == T_NODE)) {
return -1;
}
else {
return rb_iseq_cdhash_cmp(val, lit);
}
}
static st_index_t rb_parser_str_hash(rb_parser_string_t *str);
static st_index_t
node_cdhash_hash(VALUE a)
{
switch (OBJ_BUILTIN_TYPE(a)) {
case T_NODE:{
VALUE val;
NODE *node = RNODE(a);
enum node_type type = nd_type(node);
switch (type) {
case NODE_INTEGER:
val = rb_node_integer_literal_val(node);
if (!FIXNUM_P(val)) val = rb_big_hash(val);
return FIX2LONG(val);
case NODE_FLOAT:
val = rb_node_float_literal_val(node);
return rb_dbl_long_hash(RFLOAT_VALUE(val));
case NODE_RATIONAL:
val = rb_node_rational_literal_val(node);
return rb_rational_hash(val);
case NODE_IMAGINARY:
val = rb_node_imaginary_literal_val(node);
return rb_complex_hash(val);
case NODE_STR:
return rb_parser_str_hash(RNODE_STR(node)->string);
case NODE_SYM:
return rb_parser_str_hash(RNODE_SYM(node)->string);
case NODE_LINE:
/* Same with NODE_INTEGER FIXNUM case */
return (st_index_t)node->nd_loc.beg_pos.lineno;
case NODE_FILE:
/* Same with NODE_STR */
return rb_parser_str_hash(RNODE_FILE(node)->path);
case NODE_ENCODING:
return rb_node_encoding_val(node);
default:
rb_bug("unexpected node: %s", ruby_node_name(type));
}
}
default:
return rb_iseq_cdhash_hash(a);
}
}
static int
literal_cmp(VALUE val, VALUE lit)
{
if (val == lit) return 0;
if (!hash_literal_key_p(val) || !hash_literal_key_p(lit)) return -1;
return node_cdhash_cmp(val, lit);
}
static st_index_t
literal_hash(VALUE a)
{
if (!hash_literal_key_p(a)) return (st_index_t)a;
return node_cdhash_hash(a);
}
static VALUE
syntax_error_new(void)
{
return rb_class_new_instance(0, 0, rb_eSyntaxError);
}
#endif
static NODE *reg_named_capture_assign(struct parser_params* p, VALUE regexp, const YYLTYPE *loc);
#define compile_callback rb_suppress_tracing
VALUE rb_io_gets_internal(VALUE io);
VALUE rb_node_case_when_optimizable_literal(const NODE *const node);
#endif /* !UNIVERSAL_PARSER */
static inline int
parse_isascii(int c)
{
return '\0' <= c && c <= '\x7f';
}
#undef ISASCII
#define ISASCII parse_isascii
static inline int
parse_isspace(int c)
{
return c == ' ' || ('\t' <= c && c <= '\r');
}
#undef ISSPACE
#define ISSPACE parse_isspace
static inline int
parse_iscntrl(int c)
{
return ('\0' <= c && c < ' ') || c == '\x7f';
}
#undef ISCNTRL
#define ISCNTRL(c) parse_iscntrl(c)
static inline int
parse_isupper(int c)
{
return 'A' <= c && c <= 'Z';
}
static inline int
parse_islower(int c)
{
return 'a' <= c && c <= 'z';
}
static inline int
parse_isalpha(int c)
{
return parse_isupper(c) || parse_islower(c);
}
#undef ISALPHA
#define ISALPHA(c) parse_isalpha(c)
static inline int
parse_isdigit(int c)
{
return '0' <= c && c <= '9';
}
#undef ISDIGIT
#define ISDIGIT(c) parse_isdigit(c)
static inline int
parse_isalnum(int c)
{
return parse_isalpha(c) || parse_isdigit(c);
}
#undef ISALNUM
#define ISALNUM(c) parse_isalnum(c)
static inline int
parse_isxdigit(int c)
{
return parse_isdigit(c) || ('A' <= c && c <= 'F') || ('a' <= c && c <= 'f');
}
#undef ISXDIGIT
#define ISXDIGIT(c) parse_isxdigit(c)
#include "parser_st.h"
#undef STRCASECMP
#define STRCASECMP rb_parser_st_locale_insensitive_strcasecmp
#undef STRNCASECMP
#define STRNCASECMP rb_parser_st_locale_insensitive_strncasecmp
#ifdef RIPPER
VALUE rb_ripper_none;
#include "ripper_init.h"
#endif
enum shareability {
shareable_none,
shareable_literal,
shareable_copy,
shareable_everything,
};
enum rescue_context {
before_rescue,
after_rescue,
after_else,
after_ensure,
};
struct lex_context {
unsigned int in_defined: 1;
unsigned int in_kwarg: 1;
unsigned int in_argdef: 1;
unsigned int in_def: 1;
unsigned int in_class: 1;
BITFIELD(enum shareability, shareable_constant_value, 2);
BITFIELD(enum rescue_context, in_rescue, 2);
};
typedef struct RNode_DEF_TEMP rb_node_def_temp_t;
typedef struct RNode_EXITS rb_node_exits_t;
#if defined(__GNUC__) && !defined(__clang__)
// Suppress "parameter passing for argument of type 'struct
// lex_context' changed" notes. `struct lex_context` is file scope,
// and has no ABI compatibility issue.
RBIMPL_WARNING_PUSH()
RBIMPL_WARNING_IGNORED(-Wpsabi)
RBIMPL_WARNING_POP()
// Not sure why effective even after popped.
#endif
#include "parse.h"
#define NO_LEX_CTXT (struct lex_context){0}
#define AREF(ary, i) RARRAY_AREF(ary, i)
#ifndef WARN_PAST_SCOPE
# define WARN_PAST_SCOPE 0
#endif
#define TAB_WIDTH 8
#define yydebug (p->debug) /* disable the global variable definition */
#define YYMALLOC(size) rb_parser_malloc(p, (size))
#define YYREALLOC(ptr, size) rb_parser_realloc(p, (ptr), (size))
#define YYCALLOC(nelem, size) rb_parser_calloc(p, (nelem), (size))
#define YYFREE(ptr) rb_parser_free(p, (ptr))
#define YYFPRINTF(out, ...) rb_parser_printf(p, __VA_ARGS__)
#define YY_LOCATION_PRINT(File, loc, p) \
rb_parser_printf(p, "%d.%d-%d.%d", \
(loc).beg_pos.lineno, (loc).beg_pos.column,\
(loc).end_pos.lineno, (loc).end_pos.column)
#define YYLLOC_DEFAULT(Current, Rhs, N) \
do \
if (N) \
{ \
(Current).beg_pos = YYRHSLOC(Rhs, 1).beg_pos; \
(Current).end_pos = YYRHSLOC(Rhs, N).end_pos; \
} \
else \
{ \
(Current).beg_pos = YYRHSLOC(Rhs, 0).end_pos; \
(Current).end_pos = YYRHSLOC(Rhs, 0).end_pos; \
} \
while (0)
#define YY_(Msgid) \
(((Msgid)[0] == 'm') && (strcmp((Msgid), "memory exhausted") == 0) ? \
"nesting too deep" : (Msgid))
#define RUBY_SET_YYLLOC_FROM_STRTERM_HEREDOC(Current) \
rb_parser_set_location_from_strterm_heredoc(p, &p->lex.strterm->u.heredoc, &(Current))
#define RUBY_SET_YYLLOC_OF_DELAYED_TOKEN(Current) \
rb_parser_set_location_of_delayed_token(p, &(Current))
#define RUBY_SET_YYLLOC_OF_HEREDOC_END(Current) \
rb_parser_set_location_of_heredoc_end(p, &(Current))
#define RUBY_SET_YYLLOC_OF_DUMMY_END(Current) \
rb_parser_set_location_of_dummy_end(p, &(Current))
#define RUBY_SET_YYLLOC_OF_NONE(Current) \
rb_parser_set_location_of_none(p, &(Current))
#define RUBY_SET_YYLLOC(Current) \
rb_parser_set_location(p, &(Current))
#define RUBY_INIT_YYLLOC() \
{ \
{p->ruby_sourceline, (int)(p->lex.ptok - p->lex.pbeg)}, \
{p->ruby_sourceline, (int)(p->lex.pcur - p->lex.pbeg)}, \
}
#define IS_lex_state_for(x, ls) ((x) & (ls))
#define IS_lex_state_all_for(x, ls) (((x) & (ls)) == (ls))
#define IS_lex_state(ls) IS_lex_state_for(p->lex.state, (ls))
#define IS_lex_state_all(ls) IS_lex_state_all_for(p->lex.state, (ls))
# define SET_LEX_STATE(ls) \
parser_set_lex_state(p, ls, __LINE__)
static inline enum lex_state_e parser_set_lex_state(struct parser_params *p, enum lex_state_e ls, int line);
typedef VALUE stack_type;
static const rb_code_location_t NULL_LOC = { {0, -1}, {0, -1} };
# define SHOW_BITSTACK(stack, name) (p->debug ? rb_parser_show_bitstack(p, stack, name, __LINE__) : (void)0)
# define BITSTACK_PUSH(stack, n) (((p->stack) = ((p->stack)<<1)|((n)&1)), SHOW_BITSTACK(p->stack, #stack"(push)"))
# define BITSTACK_POP(stack) (((p->stack) = (p->stack) >> 1), SHOW_BITSTACK(p->stack, #stack"(pop)"))
# define BITSTACK_SET_P(stack) (SHOW_BITSTACK(p->stack, #stack), (p->stack)&1)
# define BITSTACK_SET(stack, n) ((p->stack)=(n), SHOW_BITSTACK(p->stack, #stack"(set)"))
/* A flag to identify keyword_do_cond, "do" keyword after condition expression.
Examples: `while ... do`, `until ... do`, and `for ... in ... do` */
#define COND_PUSH(n) BITSTACK_PUSH(cond_stack, (n))
#define COND_POP() BITSTACK_POP(cond_stack)
#define COND_P() BITSTACK_SET_P(cond_stack)
#define COND_SET(n) BITSTACK_SET(cond_stack, (n))
/* A flag to identify keyword_do_block; "do" keyword after command_call.
Example: `foo 1, 2 do`. */
#define CMDARG_PUSH(n) BITSTACK_PUSH(cmdarg_stack, (n))
#define CMDARG_POP() BITSTACK_POP(cmdarg_stack)
#define CMDARG_P() BITSTACK_SET_P(cmdarg_stack)
#define CMDARG_SET(n) BITSTACK_SET(cmdarg_stack, (n))
struct vtable {
ID *tbl;
int pos;
int capa;
struct vtable *prev;
};
struct local_vars {
struct vtable *args;
struct vtable *vars;
struct vtable *used;
# if WARN_PAST_SCOPE
struct vtable *past;
# endif
struct local_vars *prev;
struct {
NODE *outer, *inner, *current;
} numparam;
NODE *it;
};
enum {
ORDINAL_PARAM = -1,
NO_PARAM = 0,
NUMPARAM_MAX = 9,
};
#define DVARS_INHERIT ((void*)1)
#define DVARS_TOPSCOPE NULL
#define DVARS_TERMINAL_P(tbl) ((tbl) == DVARS_INHERIT || (tbl) == DVARS_TOPSCOPE)
typedef struct token_info {
const char *token;
rb_code_position_t beg;
int indent;
int nonspc;
struct token_info *next;
} token_info;
typedef struct end_expect_token_locations {
const rb_code_position_t *pos;
struct end_expect_token_locations *prev;
} end_expect_token_locations_t;
typedef struct parser_string_buffer_elem {
struct parser_string_buffer_elem *next;
long len; /* Total length of allocated buf */
long used; /* Current usage of buf */
rb_parser_string_t *buf[FLEX_ARY_LEN];
} parser_string_buffer_elem_t;
typedef struct parser_string_buffer {
parser_string_buffer_elem_t *head;
parser_string_buffer_elem_t *last;
} parser_string_buffer_t;
#define AFTER_HEREDOC_WITHOUT_TERMINTOR ((rb_parser_string_t *)1)
/*
Structure of Lexer Buffer:
lex.pbeg lex.ptok lex.pcur lex.pend
| | | |
|------------+------------+------------|
|<---------->|
token
*/
struct parser_params {
rb_imemo_tmpbuf_t *heap;
YYSTYPE *lval;
YYLTYPE *yylloc;
struct {
rb_strterm_t *strterm;
VALUE (*gets)(struct parser_params*,VALUE);
VALUE input;
parser_string_buffer_t string_buffer;
rb_parser_string_t *lastline;
rb_parser_string_t *nextline;
const char *pbeg;
const char *pcur;
const char *pend;
const char *ptok;
union {
long ptr;
VALUE (*call)(VALUE, int);
} gets_;
enum lex_state_e state;
/* track the nest level of any parens "()[]{}" */
int paren_nest;
/* keep p->lex.paren_nest at the beginning of lambda "->" to detect tLAMBEG and keyword_do_LAMBDA */
int lpar_beg;
/* track the nest level of only braces "{}" */
int brace_nest;
} lex;
stack_type cond_stack;
stack_type cmdarg_stack;
int tokidx;
int toksiz;
int heredoc_end;
int heredoc_indent;
int heredoc_line_indent;
char *tokenbuf;
struct local_vars *lvtbl;
st_table *pvtbl;
st_table *pktbl;
int line_count;
int ruby_sourceline; /* current line no. */
const char *ruby_sourcefile; /* current source file */
VALUE ruby_sourcefile_string;
rb_encoding *enc;
token_info *token_info;
VALUE case_labels;
rb_node_exits_t *exits;
VALUE debug_buffer;
VALUE debug_output;
struct {
VALUE token;
int beg_line;
int beg_col;
int end_line;
int end_col;
} delayed;
ID cur_arg;
rb_ast_t *ast;
int node_id;
int max_numparam;
ID it_id;
struct lex_context ctxt;
NODE *eval_tree_begin;
NODE *eval_tree;
const struct rb_iseq_struct *parent_iseq;
#ifdef UNIVERSAL_PARSER
const rb_parser_config_t *config;
#endif
/* compile_option */
signed int frozen_string_literal:2; /* -1: not specified, 0: false, 1: true */
unsigned int command_start:1;
unsigned int eofp: 1;
unsigned int ruby__end__seen: 1;
unsigned int debug: 1;
unsigned int has_shebang: 1;
unsigned int token_seen: 1;
unsigned int token_info_enabled: 1;
# if WARN_PAST_SCOPE
unsigned int past_scope_enabled: 1;
# endif
unsigned int error_p: 1;
unsigned int cr_seen: 1;
#ifndef RIPPER
/* Ruby core only */
unsigned int do_print: 1;
unsigned int do_loop: 1;
unsigned int do_chomp: 1;
unsigned int do_split: 1;
unsigned int error_tolerant: 1;
unsigned int keep_tokens: 1;
VALUE error_buffer;
VALUE debug_lines;
/*
* Store specific keyword locations to generate dummy end token.
* Refer to the tail of list element.
*/
end_expect_token_locations_t *end_expect_token_locations;
/* id for terms */
int token_id;
/* Array for term tokens */
VALUE tokens;
#else
/* Ripper only */
VALUE value;
VALUE result;
VALUE parsing_thread;
VALUE s_value; /* Token VALUE */
VALUE s_lvalue; /* VALUE generated by rule action (reduce) */
VALUE s_value_stack;
#endif
};
#define NUMPARAM_ID_P(id) numparam_id_p(p, id)
#define NUMPARAM_ID_TO_IDX(id) (unsigned int)(((id) >> ID_SCOPE_SHIFT) - (tNUMPARAM_1 - 1))
#define NUMPARAM_IDX_TO_ID(idx) TOKEN2LOCALID((tNUMPARAM_1 - 1 + (idx)))
static int
numparam_id_p(struct parser_params *p, ID id)
{
if (!is_local_id(id) || id < (tNUMPARAM_1 << ID_SCOPE_SHIFT)) return 0;
unsigned int idx = NUMPARAM_ID_TO_IDX(id);
return idx > 0 && idx <= NUMPARAM_MAX;
}
static void numparam_name(struct parser_params *p, ID id);
#ifdef RIPPER
static void
after_shift(struct parser_params *p)
{
if (p->debug) {
rb_parser_printf(p, "after-shift: %+"PRIsVALUE"\n", p->s_value);
}
rb_ary_push(p->s_value_stack, p->s_value);
p->s_value = Qnil;
}
static void
before_reduce(int len, struct parser_params *p)
{
// Initialize $$ with $1.
if (len) p->s_lvalue = rb_ary_entry(p->s_value_stack, -len);
}
static void
after_reduce(int len, struct parser_params *p)
{
for (int i = 0; i < len; i++) {
if (p->debug) {
rb_parser_printf(p, "after-reduce pop: %+"PRIsVALUE"\n", rb_ary_entry(p->s_value_stack, -1));
}
rb_ary_pop(p->s_value_stack);
}
if (p->debug) {
rb_parser_printf(p, "after-reduce push: %+"PRIsVALUE"\n", p->s_lvalue);
}
rb_ary_push(p->s_value_stack, p->s_lvalue);
p->s_lvalue = Qnil;
}
static void
after_shift_error_token(struct parser_params *p)
{
if (p->debug) {
rb_parser_printf(p, "after-shift-error-token:\n");
}
rb_ary_push(p->s_value_stack, Qnil);
}
static void
after_pop_stack(int len, struct parser_params *p)
{
for (int i = 0; i < len; i++) {
if (p->debug) {
rb_parser_printf(p, "after-pop-stack pop: %+"PRIsVALUE"\n", rb_ary_entry(p->s_value_stack, -1));
}
rb_ary_pop(p->s_value_stack);
}
}
#else
static void
after_shift(struct parser_params *p)
{
}
static void
before_reduce(int len, struct parser_params *p)
{
}
static void
after_reduce(int len, struct parser_params *p)
{
}
static void
after_shift_error_token(struct parser_params *p)
{
}
static void
after_pop_stack(int len, struct parser_params *p)
{
}
#endif
#define intern_cstr(n,l,en) rb_intern3(n,l,en)
#define STRING_NEW0() rb_parser_encoding_string_new(p,0,0,p->enc)
#define STR_NEW(ptr,len) rb_enc_str_new((ptr),(len),p->enc)
#define STR_NEW0() rb_enc_str_new(0,0,p->enc)
#define STR_NEW2(ptr) rb_enc_str_new((ptr),strlen(ptr),p->enc)
#define STR_NEW3(ptr,len,e,func) parser_str_new(p, (ptr),(len),(e),(func),p->enc)
#define TOK_INTERN() intern_cstr(tok(p), toklen(p), p->enc)
#define VALID_SYMNAME_P(s, l, enc, type) (rb_enc_symname_type(s, l, enc, (1U<<(type))) == (int)(type))
static inline bool
end_with_newline_p(struct parser_params *p, VALUE str)
{
return RSTRING_LEN(str) > 0 && RSTRING_END(str)[-1] == '\n';
}
static void
pop_pvtbl(struct parser_params *p, st_table *tbl)
{
st_free_table(p->pvtbl);
p->pvtbl = tbl;
}
static void
pop_pktbl(struct parser_params *p, st_table *tbl)
{
if (p->pktbl) st_free_table(p->pktbl);
p->pktbl = tbl;
}
#define STRING_BUF_DEFAULT_LEN 16
static void
string_buffer_init(struct parser_params *p)
{
parser_string_buffer_t *buf = &p->lex.string_buffer;
const size_t size = offsetof(parser_string_buffer_elem_t, buf) + sizeof(rb_parser_string_t *) * STRING_BUF_DEFAULT_LEN;
buf->head = buf->last = xmalloc(size);
buf->head->len = STRING_BUF_DEFAULT_LEN;
buf->head->used = 0;
buf->head->next = NULL;
}
static void
string_buffer_append(struct parser_params *p, rb_parser_string_t *str)
{
parser_string_buffer_t *buf = &p->lex.string_buffer;
if (buf->head->used >= buf->head->len) {
parser_string_buffer_elem_t *elem;
long n = buf->head->len * 2;
const size_t size = offsetof(parser_string_buffer_elem_t, buf) + sizeof(rb_parser_string_t *) * n;
elem = xmalloc(size);
elem->len = n;
elem->used = 0;
elem->next = NULL;
buf->last->next = elem;
buf->last = elem;
}
buf->last->buf[buf->last->used++] = str;
}
static void rb_parser_string_free(rb_parser_t *p, rb_parser_string_t *str);
static void
string_buffer_free(struct parser_params *p)
{
parser_string_buffer_elem_t *elem = p->lex.string_buffer.head;
while (elem) {
parser_string_buffer_elem_t *next_elem = elem->next;
for (long i = 0; i < elem->used; i++) {
rb_parser_string_free(p, elem->buf[i]);
}
xfree(elem);
elem = next_elem;
}
}
#ifndef RIPPER
static void flush_debug_buffer(struct parser_params *p, VALUE out, VALUE str);
static void
debug_end_expect_token_locations(struct parser_params *p, const char *name)
{
if(p->debug) {
VALUE mesg = rb_sprintf("%s: [", name);
int i = 0;
for (end_expect_token_locations_t *loc = p->end_expect_token_locations; loc; loc = loc->prev) {
if (i > 0)
rb_str_cat_cstr(mesg, ", ");
rb_str_catf(mesg, "[%d, %d]", loc->pos->lineno, loc->pos->column);
i++;
}
rb_str_cat_cstr(mesg, "]\n");
flush_debug_buffer(p, p->debug_output, mesg);
}
}
static void
push_end_expect_token_locations(struct parser_params *p, const rb_code_position_t *pos)
{
if(!p->error_tolerant) return;
end_expect_token_locations_t *locations;
locations = ALLOC(end_expect_token_locations_t);
locations->pos = pos;
locations->prev = p->end_expect_token_locations;
p->end_expect_token_locations = locations;
debug_end_expect_token_locations(p, "push_end_expect_token_locations");
}
static void
pop_end_expect_token_locations(struct parser_params *p)
{
if(!p->end_expect_token_locations) return;
end_expect_token_locations_t *locations = p->end_expect_token_locations->prev;
ruby_sized_xfree(p->end_expect_token_locations, sizeof(end_expect_token_locations_t));
p->end_expect_token_locations = locations;
debug_end_expect_token_locations(p, "pop_end_expect_token_locations");
}
static end_expect_token_locations_t *
peek_end_expect_token_locations(struct parser_params *p)
{
return p->end_expect_token_locations;
}
static ID
parser_token2id(struct parser_params *p, enum yytokentype tok)
{
switch ((int) tok) {
#define TOKEN2ID(tok) case tok: return rb_intern(#tok);
#define TOKEN2ID2(tok, name) case tok: return rb_intern(name);
TOKEN2ID2(' ', "words_sep")
TOKEN2ID2('!', "!")
TOKEN2ID2('%', "%");
TOKEN2ID2('&', "&");
TOKEN2ID2('*', "*");
TOKEN2ID2('+', "+");
TOKEN2ID2('-', "-");
TOKEN2ID2('/', "/");
TOKEN2ID2('<', "<");
TOKEN2ID2('=', "=");
TOKEN2ID2('>', ">");
TOKEN2ID2('?', "?");
TOKEN2ID2('^', "^");
TOKEN2ID2('|', "|");
TOKEN2ID2('~', "~");
TOKEN2ID2(':', ":");
TOKEN2ID2(',', ",");
TOKEN2ID2('.', ".");
TOKEN2ID2(';', ";");
TOKEN2ID2('`', "`");
TOKEN2ID2('\n', "nl");
TOKEN2ID2('{', "{");
TOKEN2ID2('}', "}");
TOKEN2ID2('[', "[");
TOKEN2ID2(']', "]");
TOKEN2ID2('(', "(");
TOKEN2ID2(')', ")");
TOKEN2ID2('\\', "backslash");
TOKEN2ID(keyword_class);
TOKEN2ID(keyword_module);
TOKEN2ID(keyword_def);
TOKEN2ID(keyword_undef);
TOKEN2ID(keyword_begin);
TOKEN2ID(keyword_rescue);
TOKEN2ID(keyword_ensure);
TOKEN2ID(keyword_end);
TOKEN2ID(keyword_if);
TOKEN2ID(keyword_unless);
TOKEN2ID(keyword_then);
TOKEN2ID(keyword_elsif);
TOKEN2ID(keyword_else);
TOKEN2ID(keyword_case);
TOKEN2ID(keyword_when);
TOKEN2ID(keyword_while);
TOKEN2ID(keyword_until);
TOKEN2ID(keyword_for);
TOKEN2ID(keyword_break);
TOKEN2ID(keyword_next);
TOKEN2ID(keyword_redo);
TOKEN2ID(keyword_retry);
TOKEN2ID(keyword_in);
TOKEN2ID(keyword_do);
TOKEN2ID(keyword_do_cond);
TOKEN2ID(keyword_do_block);
TOKEN2ID(keyword_do_LAMBDA);
TOKEN2ID(keyword_return);
TOKEN2ID(keyword_yield);
TOKEN2ID(keyword_super);
TOKEN2ID(keyword_self);
TOKEN2ID(keyword_nil);
TOKEN2ID(keyword_true);
TOKEN2ID(keyword_false);
TOKEN2ID(keyword_and);
TOKEN2ID(keyword_or);
TOKEN2ID(keyword_not);
TOKEN2ID(modifier_if);
TOKEN2ID(modifier_unless);
TOKEN2ID(modifier_while);
TOKEN2ID(modifier_until);
TOKEN2ID(modifier_rescue);
TOKEN2ID(keyword_alias);
TOKEN2ID(keyword_defined);