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5912531f DM |
1 | /* parser.h |
2 | * | |
2eee27d7 | 3 | * Copyright (c) 2006, 2007, 2009, 2010, 2011 Larry Wall and others |
5912531f DM |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public | |
6 | * License or the Artistic License, as specified in the README file. | |
7 | * | |
8 | * This file defines the layout of the parser object used by the parser | |
6cded92d | 9 | * and lexer (perly.c, toke.c). |
5912531f DM |
10 | */ |
11 | ||
acdf0a21 DM |
12 | #define YYEMPTY (-2) |
13 | ||
5912531f DM |
14 | typedef struct { |
15 | YYSTYPE val; /* semantic value */ | |
16 | short state; | |
33703721 | 17 | I32 savestack_ix; /* size of savestack at this state */ |
8c63ea58 | 18 | CV *compcv; /* value of PL_compcv when this value was created */ |
5912531f DM |
19 | #ifdef DEBUGGING |
20 | const char *name; /* token/rule name for -Dpv */ | |
21 | #endif | |
22 | } yy_stack_frame; | |
23 | ||
22735491 | 24 | typedef struct yy_parser { |
199e78b7 DM |
25 | |
26 | /* parser state */ | |
27 | ||
22735491 | 28 | struct yy_parser *old_parser; /* previous value of PL_parser */ |
5912531f | 29 | YYSTYPE yylval; /* value of lookahead symbol, set by yylex() */ |
9bd87817 | 30 | int yychar; /* The lookahead symbol. */ |
5912531f DM |
31 | |
32 | /* Number of tokens to shift before error messages enabled. */ | |
33 | int yyerrstatus; | |
34 | ||
35 | int stack_size; | |
36 | int yylen; /* length of active reduction */ | |
22735491 | 37 | yy_stack_frame *stack; /* base of stack */ |
5912531f | 38 | yy_stack_frame *ps; /* current stack frame */ |
199e78b7 DM |
39 | |
40 | /* lexer state */ | |
41 | ||
78cdf107 | 42 | I32 lex_brackets; /* square and curly bracket count */ |
199e78b7 DM |
43 | I32 lex_casemods; /* casemod count */ |
44 | char *lex_brackstack;/* what kind of brackets to pop */ | |
45 | char *lex_casestack; /* what kind of case mods in effect */ | |
651b5b28 NC |
46 | U8 lex_defer; /* state after determined token */ |
47 | bool lex_dojoin; /* doing an array interpolation */ | |
48 | U8 lex_expect; /* expect after determined token */ | |
53a7735b | 49 | U8 expect; /* how to interpret ambiguous tokens */ |
199e78b7 DM |
50 | I32 lex_formbrack; /* bracket count at outer format level */ |
51 | OP *lex_inpat; /* in pattern $) and $| are special */ | |
199e78b7 DM |
52 | OP *lex_op; /* extra info to pass back on op */ |
53 | SV *lex_repl; /* runtime replacement from s/// */ | |
651b5b28 | 54 | U16 lex_inwhat; /* what kind of quoting are we in */ |
f06b5848 | 55 | OPCODE last_lop_op; /* last list operator */ |
199e78b7 DM |
56 | I32 lex_starts; /* how many interps done on level */ |
57 | SV *lex_stuff; /* runtime pattern from m// or s/// */ | |
58 | I32 multi_start; /* 1st line of multi-line string */ | |
670a9cb2 | 59 | I32 multi_end; /* last line of multi-line string */ |
651b5b28 NC |
60 | char multi_open; /* delimiter of said string */ |
61 | char multi_close; /* delimiter of said string */ | |
199e78b7 DM |
62 | char pending_ident; /* pending identifier lookup */ |
63 | bool preambled; | |
78cdf107 | 64 | I32 lex_allbrackets;/* (), [], {}, ?: bracket count */ |
199e78b7 | 65 | SUBLEXINFO sublex_info; |
bdc0bf6f | 66 | SV *linestr; /* current chunk of src text */ |
f06b5848 DM |
67 | char *bufptr; |
68 | char *oldbufptr; | |
69 | char *oldoldbufptr; | |
70 | char *bufend; | |
71 | char *linestart; /* beginning of most recently read line */ | |
72 | char *last_uni; /* position of last named-unary op */ | |
73 | char *last_lop; /* position of last list operator */ | |
12bd6ede DM |
74 | line_t copline; /* current line number */ |
75 | U16 in_my; /* we're compiling a "my"/"our" declaration */ | |
bc177e6b | 76 | U8 lex_state; /* next token is determined */ |
1f0c31d7 | 77 | U8 error_count; /* how many compile errors so far, max 10 */ |
12bd6ede | 78 | HV *in_my_stash; /* declared class of this "my" declaration */ |
2f9285f8 | 79 | PerlIO *rsfp; /* current source file pointer */ |
5486870f | 80 | AV *rsfp_filters; /* holds chain of active source filters */ |
199e78b7 DM |
81 | |
82 | #ifdef PERL_MAD | |
83 | SV *endwhite; | |
84 | I32 faketokens; | |
85 | I32 lasttoke; | |
86 | SV *nextwhite; | |
87 | I32 realtokenstart; | |
88 | SV *skipwhite; | |
89 | SV *thisclose; | |
90 | MADPROP * thismad; | |
91 | SV *thisopen; | |
92 | SV *thisstuff; | |
93 | SV *thistoken; | |
94 | SV *thiswhite; | |
fb205e7a DM |
95 | |
96 | /* What we know when we're in LEX_KNOWNEXT state. */ | |
97 | NEXTTOKE nexttoke[5]; /* value of next token, if any */ | |
98 | I32 curforce; | |
99 | #else | |
100 | YYSTYPE nextval[5]; /* value of next token, if any */ | |
101 | I32 nexttype[5]; /* type of next token */ | |
102 | I32 nexttoke; | |
199e78b7 | 103 | #endif |
fb205e7a | 104 | |
7c4baf47 | 105 | COP *saved_curcop; /* the previous PL_curcop */ |
14047fc9 | 106 | char tokenbuf[256]; |
7c4baf47 | 107 | |
78cdf107 | 108 | U8 lex_fakeeof; /* precedence at which to fake EOF */ |
286a76ab | 109 | U8 lex_flags; |
7ad221d3 FC |
110 | PERL_BITFIELD16 in_pod:1; /* lexer is within a =pod section */ |
111 | PERL_BITFIELD16 filtered:1; /* source filters in evalbytes */ | |
5912531f | 112 | } yy_parser; |
5912531f | 113 | |
f0e67a1d Z |
114 | /* flags for lexer API */ |
115 | #define LEX_STUFF_UTF8 0x00000001 | |
116 | #define LEX_KEEP_PREVIOUS 0x00000002 | |
17e00314 | 117 | |
27fcb6ee FC |
118 | #ifdef PERL_CORE |
119 | # define LEX_START_SAME_FILTER 0x00000001 | |
60d63348 FC |
120 | # define LEX_IGNORE_UTF8_HINTS 0x00000002 |
121 | # define LEX_EVALBYTES 0x00000004 | |
0abcdfa4 | 122 | # define LEX_START_COPIED 0x00000008 |
87606032 | 123 | # define LEX_DONT_CLOSE_RSFP 0x00000010 |
60d63348 | 124 | # define LEX_START_FLAGS \ |
0abcdfa4 | 125 | (LEX_START_SAME_FILTER|LEX_START_COPIED \ |
87606032 | 126 | |LEX_IGNORE_UTF8_HINTS|LEX_EVALBYTES|LEX_DONT_CLOSE_RSFP) |
27fcb6ee | 127 | #endif |
f0e67a1d | 128 | |
361d9b55 Z |
129 | /* flags for parser API */ |
130 | #define PARSE_OPTIONAL 0x00000001 | |
131 | ||
78cdf107 Z |
132 | /* values for lex_fakeeof */ |
133 | enum { | |
134 | LEX_FAKEEOF_NEVER, /* don't fake EOF */ | |
135 | LEX_FAKEEOF_CLOSING, /* fake EOF at unmatched closing punctuation */ | |
136 | LEX_FAKEEOF_NONEXPR, /* ... and at token that can't be in expression */ | |
137 | LEX_FAKEEOF_LOWLOGIC, /* ... and at low-precedence logic operator */ | |
138 | LEX_FAKEEOF_COMMA, /* ... and at comma */ | |
139 | LEX_FAKEEOF_ASSIGN, /* ... and at assignment operator */ | |
140 | LEX_FAKEEOF_IFELSE, /* ... and at ?: operator */ | |
141 | LEX_FAKEEOF_RANGE, /* ... and at range operator */ | |
142 | LEX_FAKEEOF_LOGIC, /* ... and at logic operator */ | |
143 | LEX_FAKEEOF_BITWISE, /* ... and at bitwise operator */ | |
144 | LEX_FAKEEOF_COMPARE, /* ... and at comparison operator */ | |
145 | LEX_FAKEEOF_MAX | |
146 | }; | |
147 | ||
e9a8c099 MHM |
148 | /* |
149 | * Local variables: | |
150 | * c-indentation-style: bsd | |
151 | * c-basic-offset: 4 | |
14d04a33 | 152 | * indent-tabs-mode: nil |
e9a8c099 MHM |
153 | * End: |
154 | * | |
14d04a33 | 155 | * ex: set ts=8 sts=4 sw=4 et: |
e9a8c099 | 156 | */ |