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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
**********************************************************************/
%{
#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
#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"
#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 rb_parser_printf
#define YYPRINT(out, tok, val) parser_token_value_print(p, (tok), &(val))
#define YY_LOCATION_PRINT(File, loc) \
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 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_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)}, \
}
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_LABEL_bit, /* flag bit, label is allowed. */
EXPR_LABELED_bit, /* flag bit, just after a label. */
EXPR_FITEM_bit, /* symbol literal as FNAME. */
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(LABEL),
DEF_EXPR(LABELED),
DEF_EXPR(FITEM),
EXPR_VALUE = EXPR_BEG,
EXPR_BEG_ANY = (EXPR_BEG | EXPR_MID | EXPR_CLASS),
EXPR_ARG_ANY = (EXPR_ARG | EXPR_CMDARG),
EXPR_END_ANY = (EXPR_END | EXPR_ENDARG | EXPR_ENDFN),
EXPR_NONE = 0
};
#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) \
(p->lex.state = \
(p->debug ? \
rb_parser_trace_lex_state(p, p->lex.state, (ls), __LINE__) : \
(enum lex_state_e)(ls)))
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;
# ifndef RIPPER
struct {
NODE *outer, *inner, *current;
} numparam;
# endif
};
enum {
ORDINAL_PARAM = -1,
NO_PARAM = 0,
NUMPARAM_MAX = 9,
};
#define NUMPARAM_ID_P(id) numparam_id_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 + (idx) - 1))
static int
numparam_id_p(ID id)
{
if (!is_local_id(id)) 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);
#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 rb_strterm_struct rb_strterm_t;
/*
Structure of Lexer Buffer:
lex.pbeg lex.ptok lex.pcur lex.pend
| | | |
|------------+------------+------------|
|<---------->|
token
*/
struct parser_params {
rb_imemo_tmpbuf_t *heap;
YYSTYPE *lval;
struct {
rb_strterm_t *strterm;
VALUE (*gets)(struct parser_params*,VALUE);
VALUE input;
VALUE prevline;
VALUE lastline;
VALUE 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 tokline;
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;
VALUE compile_option;
VALUE debug_buffer;
VALUE debug_output;
ID cur_arg;
rb_ast_t *ast;
int node_id;
int max_numparam;
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 in_defined: 1;
unsigned int in_kwarg: 1;
unsigned int in_def: 1;
unsigned int in_class: 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 warn_location: 1;
NODE *eval_tree_begin;
NODE *eval_tree;
VALUE error_buffer;
VALUE debug_lines;
const struct rb_iseq_struct *parent_iseq;
#else
/* Ripper only */
struct {
VALUE token;
int line;
int col;
} delayed;
VALUE value;
VALUE result;
VALUE parsing_thread;
#endif
};
#define intern_cstr(n,l,en) rb_intern3(n,l,en)
#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((ptr),(len),(e),(func),p->enc)
#define TOK_INTERN() intern_cstr(tok(p), toklen(p), p->enc)
static st_table *
push_pvtbl(struct parser_params *p)
{
st_table *tbl = p->pvtbl;
p->pvtbl = st_init_numtable();
return tbl;
}
static void
pop_pvtbl(struct parser_params *p, st_table *tbl)
{
st_free_table(p->pvtbl);
p->pvtbl = tbl;
}
static st_table *
push_pktbl(struct parser_params *p)
{
st_table *tbl = p->pktbl;
p->pktbl = 0;
return tbl;
}
static void
pop_pktbl(struct parser_params *p, st_table *tbl)
{
if (p->pktbl) st_free_table(p->pktbl);
p->pktbl = tbl;
}
static int parser_yyerror(struct parser_params*, const YYLTYPE *yylloc, const char*);
#define yyerror0(msg) parser_yyerror(p, NULL, (msg))
#define yyerror1(loc, msg) parser_yyerror(p, (loc), (msg))
#define yyerror(yylloc, p, msg) parser_yyerror(p, yylloc, msg)
#define token_flush(ptr) ((ptr)->lex.ptok = (ptr)->lex.pcur)
#ifdef RIPPER
#define compile_for_eval (0)
#else
#define compile_for_eval (p->parent_iseq != 0)
#endif
#define token_column ((int)(p->lex.ptok - p->lex.pbeg))
#define CALL_Q_P(q) ((q) == TOKEN2VAL(tANDDOT))
#define NODE_CALL_Q(q) (CALL_Q_P(q) ? NODE_QCALL : NODE_CALL)
#define NEW_QCALL(q,r,m,a,loc) NEW_NODE(NODE_CALL_Q(q),r,m,a,loc)
#define lambda_beginning_p() (p->lex.lpar_beg == p->lex.paren_nest)
static enum yytokentype yylex(YYSTYPE*, YYLTYPE*, struct parser_params*);
#ifndef RIPPER
static inline void
rb_discard_node(struct parser_params *p, NODE *n)
{
rb_ast_delete_node(p->ast, n);
}
#endif
#ifdef RIPPER
static inline VALUE
add_mark_object(struct parser_params *p, VALUE obj)
{
if (!SPECIAL_CONST_P(obj)
&& !RB_TYPE_P(obj, T_NODE) /* Ripper jumbles NODE objects and other objects... */
) {
rb_ast_add_mark_object(p->ast, obj);
}
return obj;
}
#else
static NODE* node_newnode_with_locals(struct parser_params *, enum node_type, VALUE, VALUE, const rb_code_location_t*);
#endif
static NODE* node_newnode(struct parser_params *, enum node_type, VALUE, VALUE, VALUE, const rb_code_location_t*);
#define rb_node_newnode(type, a1, a2, a3, loc) node_newnode(p, (type), (a1), (a2), (a3), (loc))
static NODE *nd_set_loc(NODE *nd, const YYLTYPE *loc);
static int
parser_get_node_id(struct parser_params *p)
{
int node_id = p->node_id;
p->node_id++;
return node_id;
}
#ifndef RIPPER
static inline void
set_line_body(NODE *body, int line)
{
if (!body) return;
switch (nd_type(body)) {
case NODE_RESCUE:
case NODE_ENSURE:
nd_set_line(body, line);
}
}
#define yyparse ruby_yyparse
static NODE* cond(struct parser_params *p, NODE *node, const YYLTYPE *loc);
static NODE* method_cond(struct parser_params *p, NODE *node, const YYLTYPE *loc);
#define new_nil(loc) NEW_NIL(loc)
static NODE *new_if(struct parser_params*,NODE*,NODE*,NODE*,const YYLTYPE*);
static NODE *new_unless(struct parser_params*,NODE*,NODE*,NODE*,const YYLTYPE*);
static NODE *logop(struct parser_params*,ID,NODE*,NODE*,const YYLTYPE*,const YYLTYPE*);
static NODE *newline_node(NODE*);
static void fixpos(NODE*,NODE*);
static int value_expr_gen(struct parser_params*,NODE*);
static void void_expr(struct parser_params*,NODE*);
static NODE *remove_begin(NODE*);
static NODE *remove_begin_all(NODE*);
#define value_expr(node) value_expr_gen(p, (node) = remove_begin(node))
static NODE *void_stmts(struct parser_params*,NODE*);
static void reduce_nodes(struct parser_params*,NODE**);
static void block_dup_check(struct parser_params*,NODE*,NODE*);
static NODE *block_append(struct parser_params*,NODE*,NODE*);
static NODE *list_append(struct parser_params*,NODE*,NODE*);
static NODE *list_concat(NODE*,NODE*);
static NODE *arg_append(struct parser_params*,NODE*,NODE*,const YYLTYPE*);
static NODE *last_arg_append(struct parser_params *p, NODE *args, NODE *last_arg, const YYLTYPE *loc);
static NODE *rest_arg_append(struct parser_params *p, NODE *args, NODE *rest_arg, const YYLTYPE *loc);
static NODE *literal_concat(struct parser_params*,NODE*,NODE*,const YYLTYPE*);
static NODE *new_evstr(struct parser_params*,NODE*,const YYLTYPE*);
static NODE *evstr2dstr(struct parser_params*,NODE*);
static NODE *splat_array(NODE*);
static void mark_lvar_used(struct parser_params *p, NODE *rhs);
static NODE *call_bin_op(struct parser_params*,NODE*,ID,NODE*,const YYLTYPE*,const YYLTYPE*);
static NODE *call_uni_op(struct parser_params*,NODE*,ID,const YYLTYPE*,const YYLTYPE*);
static NODE *new_qcall(struct parser_params* p, ID atype, NODE *recv, ID mid, NODE *args, const YYLTYPE *op_loc, const YYLTYPE *loc);
static NODE *new_command_qcall(struct parser_params* p, ID atype, NODE *recv, ID mid, NODE *args, NODE *block, const YYLTYPE *op_loc, const YYLTYPE *loc);
static NODE *method_add_block(struct parser_params*p, NODE *m, NODE *b, const YYLTYPE *loc) {b->nd_iter = m; b->nd_loc = *loc; return b;}
static bool args_info_empty_p(struct rb_args_info *args);
static NODE *new_args(struct parser_params*,NODE*,NODE*,ID,NODE*,NODE*,const YYLTYPE*);
static NODE *new_args_tail(struct parser_params*,NODE*,ID,ID,const YYLTYPE*);
static NODE *new_array_pattern(struct parser_params *p, NODE *constant, NODE *pre_arg, NODE *aryptn, const YYLTYPE *loc);
static NODE *new_array_pattern_tail(struct parser_params *p, NODE *pre_args, int has_rest, ID rest_arg, NODE *post_args, const YYLTYPE *loc);
static NODE *new_hash_pattern(struct parser_params *p, NODE *constant, NODE *hshptn, const YYLTYPE *loc);
static NODE *new_hash_pattern_tail(struct parser_params *p, NODE *kw_args, ID kw_rest_arg, const YYLTYPE *loc);
static NODE *new_case3(struct parser_params *p, NODE *val, NODE *pat, const YYLTYPE *loc);
static NODE *new_kw_arg(struct parser_params *p, NODE *k, const YYLTYPE *loc);
static NODE *args_with_numbered(struct parser_params*,NODE*,int);
static VALUE negate_lit(struct parser_params*, VALUE);
static NODE *ret_args(struct parser_params*,NODE*);
static NODE *arg_blk_pass(NODE*,NODE*);
static NODE *new_yield(struct parser_params*,NODE*,const YYLTYPE*);
static NODE *dsym_node(struct parser_params*,NODE*,const YYLTYPE*);
static NODE *gettable(struct parser_params*,ID,const YYLTYPE*);
static NODE *assignable(struct parser_params*,ID,NODE*,const YYLTYPE*);
static NODE *aryset(struct parser_params*,NODE*,NODE*,const YYLTYPE*);
static NODE *attrset(struct parser_params*,NODE*,ID,ID,const YYLTYPE*);
static void rb_backref_error(struct parser_params*,NODE*);
static NODE *node_assign(struct parser_params*,NODE*,NODE*,const YYLTYPE*);
static NODE *new_op_assign(struct parser_params *p, NODE *lhs, ID op, NODE *rhs, const YYLTYPE *loc);
static NODE *new_ary_op_assign(struct parser_params *p, NODE *ary, NODE *args, ID op, NODE *rhs, const YYLTYPE *args_loc, const YYLTYPE *loc);
static NODE *new_attr_op_assign(struct parser_params *p, NODE *lhs, ID atype, ID attr, ID op, NODE *rhs, const YYLTYPE *loc);
static NODE *new_const_op_assign(struct parser_params *p, NODE *lhs, ID op, NODE *rhs, const YYLTYPE *loc);
static NODE *new_bodystmt(struct parser_params *p, NODE *head, NODE *rescue, NODE *rescue_else, NODE *ensure, const YYLTYPE *loc);
static NODE *const_decl(struct parser_params *p, NODE* path, const YYLTYPE *loc);
static NODE *opt_arg_append(NODE*, NODE*);
static NODE *kwd_append(NODE*, NODE*);
static NODE *new_hash(struct parser_params *p, NODE *hash, const YYLTYPE *loc);
static NODE *new_unique_key_hash(struct parser_params *p, NODE *hash, const YYLTYPE *loc);
static NODE *new_defined(struct parser_params *p, NODE *expr, const YYLTYPE *loc);
static NODE *new_regexp(struct parser_params *, NODE *, int, const YYLTYPE *);
#define make_list(list, loc) ((list) ? (nd_set_loc(list, loc), list) : NEW_ZLIST(loc))
static NODE *new_xstring(struct parser_params *, NODE *, const YYLTYPE *loc);
static NODE *symbol_append(struct parser_params *p, NODE *symbols, NODE *symbol);
static NODE *match_op(struct parser_params*,NODE*,NODE*,const YYLTYPE*,const YYLTYPE*);
static ID *local_tbl(struct parser_params*);
static VALUE reg_compile(struct parser_params*, VALUE, int);
static void reg_fragment_setenc(struct parser_params*, VALUE, int);
static int reg_fragment_check(struct parser_params*, VALUE, int);
static NODE *reg_named_capture_assign(struct parser_params* p, VALUE regexp, const YYLTYPE *loc);
static int literal_concat0(struct parser_params *p, VALUE head, VALUE tail);
static NODE *heredoc_dedent(struct parser_params*,NODE*);
static void check_literal_when(struct parser_params *p, NODE *args, const YYLTYPE *loc);
#define get_id(id) (id)
#define get_value(val) (val)
#define get_num(num) (num)
#else /* RIPPER */
#define NODE_RIPPER NODE_CDECL
static inline int ripper_is_node_yylval(VALUE n);
static inline VALUE
ripper_new_yylval(struct parser_params *p, ID a, VALUE b, VALUE c)
{
if (ripper_is_node_yylval(c)) c = RNODE(c)->nd_cval;
add_mark_object(p, b);
add_mark_object(p, c);
return (VALUE)NEW_CDECL(a, b, c, &NULL_LOC);
}
static inline int
ripper_is_node_yylval(VALUE n)
{
return RB_TYPE_P(n, T_NODE) && nd_type(RNODE(n)) == NODE_RIPPER;
}
#define value_expr(node) ((void)(node))
#define remove_begin(node) (node)
#define void_stmts(p,x) (x)
#define rb_dvar_defined(id, base) 0
#define rb_local_defined(id, base) 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)
#define get_num(num) (int)get_id(num)
static VALUE assignable(struct parser_params*,VALUE);
static int id_is_var(struct parser_params *p, ID id);
#define method_cond(p,node,loc) (node)
#define call_bin_op(p, recv,id,arg1,op_loc,loc) dispatch3(binary, (recv), STATIC_ID2SYM(id), (arg1))
#define match_op(p,node1,node2,op_loc,loc) call_bin_op(0, (node1), idEqTilde, (node2), op_loc, loc)
#define call_uni_op(p, recv,id,op_loc,loc) dispatch2(unary, STATIC_ID2SYM(id), (recv))
#define logop(p,id,node1,node2,op_loc,loc) call_bin_op(0, (node1), (id), (node2), op_loc, loc)
#define new_nil(loc) Qnil
static VALUE new_regexp(struct parser_params *, VALUE, VALUE, const YYLTYPE *);
static VALUE const_decl(struct parser_params *p, VALUE path);
static VALUE var_field(struct parser_params *p, VALUE a);
static VALUE assign_error(struct parser_params *p, VALUE a);
static VALUE parser_reg_compile(struct parser_params*, VALUE, int, VALUE *);
#endif /* !RIPPER */
/* forward declaration */
typedef struct rb_strterm_heredoc_struct rb_strterm_heredoc_t;
RUBY_SYMBOL_EXPORT_BEGIN
VALUE rb_parser_reg_compile(struct parser_params* p, VALUE str, int options);
int rb_reg_fragment_setenc(struct parser_params*, VALUE, int);
enum lex_state_e rb_parser_trace_lex_state(struct parser_params *, enum lex_state_e, enum lex_state_e, int);
VALUE rb_parser_lex_state_name(enum lex_state_e state);
void rb_parser_show_bitstack(struct parser_params *, stack_type, const char *, int);
PRINTF_ARGS(void rb_parser_fatal(struct parser_params *p, const char *fmt, ...), 2, 3);
YYLTYPE *rb_parser_set_location_from_strterm_heredoc(struct parser_params *p, rb_strterm_heredoc_t *here, YYLTYPE *yylloc);
YYLTYPE *rb_parser_set_location_of_none(struct parser_params *p, YYLTYPE *yylloc);
YYLTYPE *rb_parser_set_location(struct parser_params *p, YYLTYPE *yylloc);
RUBY_SYMBOL_EXPORT_END
static void error_duplicate_pattern_variable(struct parser_params *p, ID id, const YYLTYPE *loc);
static void error_duplicate_pattern_key(struct parser_params *p, ID id, const YYLTYPE *loc);
static void parser_token_value_print(struct parser_params *p, enum yytokentype type, const YYSTYPE *valp);
static ID formal_argument(struct parser_params*, ID);
static ID shadowing_lvar(struct parser_params*,ID);
static void new_bv(struct parser_params*,ID);
static void local_push(struct parser_params*,int);
static void local_pop(struct parser_params*);
static void local_var(struct parser_params*, ID);
static void arg_var(struct parser_params*, ID);
static int local_id(struct parser_params *p, ID id);
static int local_id_ref(struct parser_params*, ID, ID **);
#ifndef RIPPER
static ID internal_id(struct parser_params*);
#endif
static const struct vtable *dyna_push(struct parser_params *);
static void dyna_pop(struct parser_params*, const struct vtable *);
static int dyna_in_block(struct parser_params*);
#define dyna_var(p, id) local_var(p, id)
static int dvar_defined(struct parser_params*, ID);
static int dvar_defined_ref(struct parser_params*, ID, ID**);
static int dvar_curr(struct parser_params*,ID);
static int lvar_defined(struct parser_params*, ID);
static NODE *numparam_push(struct parser_params *p);
static void numparam_pop(struct parser_params *p, NODE *prev_inner);
#ifdef RIPPER
# define METHOD_NOT idNOT
#else
# define METHOD_NOT '!'
#endif
#define idFWD_REST '*'
#ifdef RUBY3_KEYWORDS
#define idFWD_KWREST idPow /* Use simple "**", as tDSTAR is "**arg" */
#else
#define idFWD_KWREST 0
#endif
#define idFWD_BLOCK '&'
#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
/* structs for managing terminator of string literal and heredocment */
typedef struct rb_strterm_literal_struct {
union {
VALUE dummy;
long nest;
} u0;
union {
VALUE dummy;
long func; /* STR_FUNC_* (e.g., STR_FUNC_ESCAPE and STR_FUNC_EXPAND) */
} u1;
union {
VALUE dummy;
long paren; /* '(' of `%q(...)` */
} u2;
union {
VALUE dummy;
long term; /* ')' of `%q(...)` */
} u3;
} rb_strterm_literal_t;
#define HERETERM_LENGTH_BITS ((SIZEOF_VALUE - 1) * CHAR_BIT - 1)
struct rb_strterm_heredoc_struct {
VALUE lastline; /* the string of line that contains `<<"END"` */
long offset; /* the column of END in `<<"END"` */
int sourceline; /* lineno of the line that contains `<<"END"` */
unsigned length /* the length of END in `<<"END"` */
#if HERETERM_LENGTH_BITS < SIZEOF_INT * CHAR_BIT
: HERETERM_LENGTH_BITS
# define HERETERM_LENGTH_MAX ((1U << HERETERM_LENGTH_BITS) - 1)
#else
# define HERETERM_LENGTH_MAX UINT_MAX
#endif
;
#if HERETERM_LENGTH_BITS < SIZEOF_INT * CHAR_BIT
unsigned quote: 1;
unsigned func: 8;
#else
uint8_t quote;
uint8_t func;
#endif
};
STATIC_ASSERT(rb_strterm_heredoc_t, sizeof(rb_strterm_heredoc_t) <= 4 * SIZEOF_VALUE);
#define STRTERM_HEREDOC IMEMO_FL_USER0
struct rb_strterm_struct {
VALUE flags;
union {
rb_strterm_literal_t literal;
rb_strterm_heredoc_t heredoc;
} u;
};
#ifndef RIPPER
void
rb_strterm_mark(VALUE obj)
{
rb_strterm_t *strterm = (rb_strterm_t*)obj;
if (RBASIC(obj)->flags & STRTERM_HEREDOC) {
rb_strterm_heredoc_t *heredoc = &strterm->u.heredoc;
rb_gc_mark(heredoc->lastline);
}
}
#endif
#define yytnamerr(yyres, yystr) (YYSIZE_T)rb_yytnamerr(p, yyres, yystr)
size_t rb_yytnamerr(struct parser_params *p, char *yyres, const char *yystr);
#define TOKEN2ID(tok) ( \
tTOKEN_LOCAL_BEGIN<(tok)&&(tok)<tTOKEN_LOCAL_END ? TOKEN2LOCALID(tok) : \
tTOKEN_INSTANCE_BEGIN<(tok)&&(tok)<tTOKEN_INSTANCE_END ? TOKEN2INSTANCEID(tok) : \
tTOKEN_GLOBAL_BEGIN<(tok)&&(tok)<tTOKEN_GLOBAL_END ? TOKEN2GLOBALID(tok) : \
tTOKEN_CONST_BEGIN<(tok)&&(tok)<tTOKEN_CONST_END ? TOKEN2CONSTID(tok) : \
tTOKEN_CLASS_BEGIN<(tok)&&(tok)<tTOKEN_CLASS_END ? TOKEN2CLASSID(tok) : \
tTOKEN_ATTRSET_BEGIN<(tok)&&(tok)<tTOKEN_ATTRSET_END ? TOKEN2ATTRSETID(tok) : \
((tok) / ((tok)<tPRESERVED_ID_END && ((tok)>=128 || rb_ispunct(tok)))))
/****** 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(struct parser_params *p);
#define dispatch0(n) ripper_dispatch0(p, TOKEN_PASTE(ripper_id_, n))
#define dispatch1(n,a) ripper_dispatch1(p, TOKEN_PASTE(ripper_id_, n), (a))
#define dispatch2(n,a,b) ripper_dispatch2(p, TOKEN_PASTE(ripper_id_, n), (a), (b))
#define dispatch3(n,a,b,c) ripper_dispatch3(p, TOKEN_PASTE(ripper_id_, n), (a), (b), (c))
#define dispatch4(n,a,b,c,d) ripper_dispatch4(p, TOKEN_PASTE(ripper_id_, n), (a), (b), (c), (d))
#define dispatch5(n,a,b,c,d,e) ripper_dispatch5(p, TOKEN_PASTE(ripper_id_, n), (a), (b), (c), (d), (e))
#define dispatch7(n,a,b,c,d,e,f,g) ripper_dispatch7(p, TOKEN_PASTE(ripper_id_, n), (a), (b), (c), (d), (e), (f), (g))
#define yyparse ripper_yyparse
#define ID2VAL(id) STATIC_ID2SYM(id)
#define TOKEN2VAL(t) ID2VAL(TOKEN2ID(t))
#define KWD2EID(t, v) ripper_new_yylval(p, keyword_##t, get_value(v), 0)
#define params_new(pars, opts, rest, pars2, kws, kwrest, blk) \
dispatch7(params, (pars), (opts), (rest), (pars2), (kws), (kwrest), (blk))
#define escape_Qundef(x) ((x)==Qundef ? Qnil : (x))
static inline VALUE
new_args(struct parser_params *p, VALUE pre_args, VALUE opt_args, VALUE rest_arg, VALUE post_args, VALUE tail, YYLTYPE *loc)
{
NODE *t = (NODE *)tail;
VALUE kw_args = t->u1.value, kw_rest_arg = t->u2.value, block = t->u3.value;
return params_new(pre_args, opt_args, rest_arg, post_args, kw_args, kw_rest_arg, escape_Qundef(block));
}
static inline VALUE
new_args_tail(struct parser_params *p, VALUE kw_args, VALUE kw_rest_arg, VALUE block, YYLTYPE *loc)
{
NODE *t = rb_node_newnode(NODE_ARGS_AUX, kw_args, kw_rest_arg, block, &NULL_LOC);
add_mark_object(p, kw_args);
add_mark_object(p, kw_rest_arg);
add_mark_object(p, block);
return (VALUE)t;
}
static inline VALUE
args_with_numbered(struct parser_params *p, VALUE args, int max_numparam)
{
return args;
}
static VALUE
new_array_pattern(struct parser_params *p, VALUE constant, VALUE pre_arg, VALUE aryptn, const YYLTYPE *loc)
{
NODE *t = (NODE *)aryptn;
struct rb_ary_pattern_info *apinfo = t->nd_apinfo;
VALUE pre_args = Qnil, rest_arg = Qnil, post_args = Qnil;
if (apinfo) {
pre_args = rb_ary_entry(apinfo->imemo, 0);
rest_arg = rb_ary_entry(apinfo->imemo, 1);
post_args = rb_ary_entry(apinfo->imemo, 2);
}
if (!NIL_P(pre_arg)) {
if (!NIL_P(pre_args)) {
rb_ary_unshift(pre_args, pre_arg);
}
else {
pre_args = rb_ary_new_from_args(1, pre_arg);
}
}
return dispatch4(aryptn, constant, pre_args, rest_arg, post_args);
}
static VALUE
new_array_pattern_tail(struct parser_params *p, VALUE pre_args, VALUE has_rest, VALUE rest_arg, VALUE post_args, const YYLTYPE *loc)
{
NODE *t;
struct rb_ary_pattern_info *apinfo;
if (has_rest) {
rest_arg = dispatch1(var_field, rest_arg ? rest_arg : Qnil);
}
else {
rest_arg = Qnil;
}
VALUE tmpbuf = rb_imemo_tmpbuf_auto_free_pointer();
apinfo = ZALLOC(struct rb_ary_pattern_info);
rb_imemo_tmpbuf_set_ptr(tmpbuf, apinfo);
apinfo->imemo = rb_ary_new_from_args(4, pre_args, rest_arg, post_args, tmpbuf);
t = rb_node_newnode(NODE_ARYPTN, Qnil, Qnil, (VALUE)apinfo, &NULL_LOC);
RB_OBJ_WRITTEN(p->ast, Qnil, apinfo->imemo);
return (VALUE)t;
}
#define new_hash(p,h,l) rb_ary_new_from_args(0)
static VALUE
new_unique_key_hash(struct parser_params *p, VALUE ary, const YYLTYPE *loc)
{
return ary;
}
static VALUE
new_hash_pattern(struct parser_params *p, VALUE constant, VALUE hshptn, const YYLTYPE *loc)
{
NODE *t = (NODE *)hshptn;
VALUE kw_args = t->u1.value, kw_rest_arg = t->u2.value;
return dispatch3(hshptn, constant, kw_args, kw_rest_arg);
}
static VALUE
new_hash_pattern_tail(struct parser_params *p, VALUE kw_args, VALUE kw_rest_arg, const YYLTYPE *loc)
{
NODE *t;
if (kw_rest_arg) {
kw_rest_arg = dispatch1(var_field, kw_rest_arg);
}
else {
kw_rest_arg = Qnil;
}
t = rb_node_newnode(NODE_HSHPTN, kw_args, kw_rest_arg, 0, &NULL_LOC);
add_mark_object(p, kw_args);
add_mark_object(p, kw_rest_arg);
return (VALUE)t;
}
#define new_defined(p,expr,loc) dispatch1(defined, (expr))
static VALUE heredoc_dedent(struct parser_params*,VALUE);
#else
#define ID2VAL(id) (id)
#define TOKEN2VAL(t) ID2VAL(t)
#define KWD2EID(t, v) keyword_##t
#endif /* RIPPER */
#ifndef RIPPER
# define Qnone 0
# define Qnull 0
# define ifndef_ripper(x) (x)
#else
# define Qnone Qnil
# define Qnull Qundef
# define ifndef_ripper(x)
#endif
# define rb_warn0(fmt) WARN_CALL(WARN_ARGS(fmt, 1))
# define rb_warn1(fmt,a) WARN_CALL(WARN_ARGS(fmt, 2), (a))
# define rb_warn2(fmt,a,b) WARN_CALL(WARN_ARGS(fmt, 3), (a), (b))
# define rb_warn3(fmt,a,b,c) WARN_CALL(WARN_ARGS(fmt, 4), (a), (b), (c))
# define rb_warn4(fmt,a,b,c,d) WARN_CALL(WARN_ARGS(fmt, 5), (a), (b), (c), (d))
# define rb_warning0(fmt) WARNING_CALL(WARNING_ARGS(fmt, 1))
# define rb_warning1(fmt,a) WARNING_CALL(WARNING_ARGS(fmt, 2), (a))
# define rb_warning2(fmt,a,b) WARNING_CALL(WARNING_ARGS(fmt, 3), (a), (b))
# define rb_warning3(fmt,a,b,c) WARNING_CALL(WARNING_ARGS(fmt, 4), (a), (b), (c))
# define rb_warning4(fmt,a,b,c,d) WARNING_CALL(WARNING_ARGS(fmt, 5), (a), (b), (c), (d))
# define rb_warn0L(l,fmt) WARN_CALL(WARN_ARGS_L(l, fmt, 1))
# define rb_warn1L(l,fmt,a) WARN_CALL(WARN_ARGS_L(l, fmt, 2), (a))
# define rb_warn2L(l,fmt,a,b) WARN_CALL(WARN_ARGS_L(l, fmt, 3), (a), (b))
# define rb_warn3L(l,fmt,a,b,c) WARN_CALL(WARN_ARGS_L(l, fmt, 4), (a), (b), (c))
# define rb_warn4L(l,fmt,a,b,c,d) WARN_CALL(WARN_ARGS_L(l, fmt, 5), (a), (b), (c), (d))
# define rb_warning0L(l,fmt) WARNING_CALL(WARNING_ARGS_L(l, fmt, 1))
# define rb_warning1L(l,fmt,a) WARNING_CALL(WARNING_ARGS_L(l, fmt, 2), (a))
# define rb_warning2L(l,fmt,a,b) WARNING_CALL(WARNING_ARGS_L(l, fmt, 3), (a), (b))
# define rb_warning3L(l,fmt,a,b,c) WARNING_CALL(WARNING_ARGS_L(l, fmt, 4), (a), (b), (c))
# define rb_warning4L(l,fmt,a,b,c,d) WARNING_CALL(WARNING_ARGS_L(l, fmt, 5), (a), (b), (c), (d))
#ifdef RIPPER
static ID id_warn, id_warning, id_gets, id_assoc;
# define WARN_S_L(s,l) STR_NEW(s,l)
# define WARN_S(s) STR_NEW2(s)
# define WARN_I(i) INT2NUM(i)
# define WARN_ID(i) rb_id2str(i)
# define WARN_IVAL(i) i
# define PRIsWARN "s"
# define WARN_ARGS(fmt,n) p->value, id_warn, n, rb_usascii_str_new_lit(fmt)
# define WARN_ARGS_L(l,fmt,n) WARN_ARGS(fmt,n)
# ifdef HAVE_VA_ARGS_MACRO
# define WARN_CALL(...) rb_funcall(__VA_ARGS__)
# else
# define WARN_CALL rb_funcall
# endif
# define WARNING_ARGS(fmt,n) p->value, id_warning, n, rb_usascii_str_new_lit(fmt)
# define WARNING_ARGS_L(l, fmt,n) WARNING_ARGS(fmt,n)
# ifdef HAVE_VA_ARGS_MACRO
# define WARNING_CALL(...) rb_funcall(__VA_ARGS__)
# else
# define WARNING_CALL rb_funcall
# endif
PRINTF_ARGS(static void ripper_compile_error(struct parser_params*, const char *fmt, ...), 2, 3);
# define compile_error ripper_compile_error
#else
# define WARN_S_L(s,l) s
# define WARN_S(s) s
# define WARN_I(i) i
# define WARN_ID(i) rb_id2name(i)
# define WARN_IVAL(i) NUM2INT(i)
# define PRIsWARN PRIsVALUE
# define WARN_ARGS(fmt,n) WARN_ARGS_L(p->ruby_sourceline,fmt,n)
# define WARN_ARGS_L(l,fmt,n) p->ruby_sourcefile, (l), (fmt)
# define WARN_CALL rb_compile_warn
# define WARNING_ARGS(fmt,n) WARN_ARGS(fmt,n)
# define WARNING_ARGS_L(l,fmt,n) WARN_ARGS_L(l,fmt,n)
# define WARNING_CALL rb_compile_warning
PRINTF_ARGS(static void parser_compile_error(struct parser_params*, const char *fmt, ...), 2, 3);
# define compile_error parser_compile_error
#endif
static void token_info_setup(token_info *ptinfo, const char *ptr, const rb_code_location_t *loc);
static void token_info_push(struct parser_params*, const char *token, const rb_code_location_t *loc);
static void token_info_pop(struct parser_params*, const char *token, const rb_code_location_t *loc);
static void token_info_warn(struct parser_params *p, const char *token, token_info *ptinfo_beg, int same, const rb_code_location_t *loc);
#define WARN_EOL(tok) \
(looking_at_eol_p(p) ? \
(void)rb_warning0("`" tok "' at the end of line without an expression") : \
(void)0)
static int looking_at_eol_p(struct parser_params *p);
%}
%expect 0
%define api.pure
%lex-param {struct parser_params *p}
%parse-param {struct parser_params *p}
%initial-action
{
RUBY_SET_YYLLOC_OF_NONE(@$);
};
%union {
VALUE val;
NODE *node;
ID id;
int num;
st_table *tbl;
const struct vtable *vars;
struct rb_strterm_struct *strterm;
}
%token <id>
keyword_class "`class'"
keyword_module "`module'"
keyword_def "`def'"
keyword_undef "`undef'"
keyword_begin "`begin'"
keyword_rescue "`rescue'"
keyword_ensure "`ensure'"
keyword_end "`end'"
keyword_if "`if'"
keyword_unless "`unless'"
keyword_then "`then'"
keyword_elsif "`elsif'"