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annotate perl-5.22.2/parser.h @ 8045:a16537d2fe07

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<xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
author HackBot
date Sat, 14 May 2016 14:54:38 +0000
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8045
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1 /* parser.h
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2 *
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3 * Copyright (c) 2006, 2007, 2009, 2010, 2011 Larry Wall and others
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4 *
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5 * You may distribute under the terms of either the GNU General Public
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6 * License or the Artistic License, as specified in the README file.
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7 *
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8 * This file defines the layout of the parser object used by the parser
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9 * and lexer (perly.c, toke.c).
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10 */
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11
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12 #define YYEMPTY (-2)
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13
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14 typedef struct {
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15 YYSTYPE val; /* semantic value */
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16 short state;
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17 I32 savestack_ix; /* size of savestack at this state */
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18 CV *compcv; /* value of PL_compcv when this value was created */
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19 #ifdef DEBUGGING
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20 const char *name; /* token/rule name for -Dpv */
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21 #endif
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22 } yy_stack_frame;
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23
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24 /* Fields that need to be shared with (i.e., visible to) inner lex-
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25 ing scopes. */
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26 typedef struct yy_lexshared {
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27 struct yy_lexshared *ls_prev;
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28 SV *ls_linestr; /* mirrors PL_parser->linestr */
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29 char *ls_bufptr; /* mirrors PL_parser->bufptr */
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30 char *re_eval_start; /* start of "(?{..." text */
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31 SV *re_eval_str; /* "(?{...})" text */
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32 } LEXSHARED;
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33
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34 typedef struct yy_parser {
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35
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36 /* parser state */
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37
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38 struct yy_parser *old_parser; /* previous value of PL_parser */
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39 YYSTYPE yylval; /* value of lookahead symbol, set by yylex() */
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40 int yychar; /* The lookahead symbol. */
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41
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42 /* Number of tokens to shift before error messages enabled. */
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43 int yyerrstatus;
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44
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45 int stack_size;
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46 int yylen; /* length of active reduction */
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47 yy_stack_frame *stack; /* base of stack */
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48 yy_stack_frame *ps; /* current stack frame */
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49
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50 /* lexer state */
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51
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52 I32 lex_brackets; /* square and curly bracket count */
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53 I32 lex_casemods; /* casemod count */
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54 char *lex_brackstack;/* what kind of brackets to pop */
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55 char *lex_casestack; /* what kind of case mods in effect */
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56 U8 lex_defer; /* state after determined token */
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57 U8 lex_dojoin; /* doing an array interpolation
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58 1 = @{...} 2 = ->@ */
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59 U8 lex_expect; /* UNUSED */
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60 U8 expect; /* how to interpret ambiguous tokens */
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61 I32 lex_formbrack; /* bracket count at outer format level */
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62 OP *lex_inpat; /* in pattern $) and $| are special */
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63 OP *lex_op; /* extra info to pass back on op */
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64 SV *lex_repl; /* runtime replacement from s/// */
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65 U16 lex_inwhat; /* what kind of quoting are we in */
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66 OPCODE last_lop_op; /* last named list or unary operator */
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67 I32 lex_starts; /* how many interps done on level */
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68 SV *lex_stuff; /* runtime pattern from m// or s/// */
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69 I32 multi_start; /* 1st line of multi-line string */
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70 I32 multi_end; /* last line of multi-line string */
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71 char multi_open; /* delimiter of said string */
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72 char multi_close; /* delimiter of said string */
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73 bool preambled;
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74 bool lex_re_reparsing; /* we're doing G_RE_REPARSING */
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75 I32 lex_allbrackets;/* (), [], {}, ?: bracket count */
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76 SUBLEXINFO sublex_info;
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77 LEXSHARED *lex_shared;
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78 SV *linestr; /* current chunk of src text */
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79 char *bufptr; /* carries the cursor (current parsing
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80 position) from one invocation of yylex
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81 to the next */
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82 char *oldbufptr; /* in yylex, beginning of current token */
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83 char *oldoldbufptr; /* in yylex, beginning of previous token */
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84 char *bufend;
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85 char *linestart; /* beginning of most recently read line */
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86 char *last_uni; /* position of last named-unary op */
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87 char *last_lop; /* position of last list operator */
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88 /* copline is used to pass a specific line number to newSTATEOP. It
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89 is a one-time line number, as newSTATEOP invalidates it (sets it to
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90 NOLINE) after using it. The purpose of this is to report line num-
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91 bers in multiline constructs using the number of the first line. */
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92 line_t copline;
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93 U16 in_my; /* we're compiling a "my"/"our" declaration */
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94 U8 lex_state; /* next token is determined */
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95 U8 error_count; /* how many compile errors so far, max 10 */
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96 HV *in_my_stash; /* declared class of this "my" declaration */
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97 PerlIO *rsfp; /* current source file pointer */
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98 AV *rsfp_filters; /* holds chain of active source filters */
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99 U8 form_lex_state; /* remember lex_state when parsing fmt */
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100
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101 YYSTYPE nextval[5]; /* value of next token, if any */
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102 I32 nexttype[5]; /* type of next token */
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103 U32 nexttoke;
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104
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105 COP *saved_curcop; /* the previous PL_curcop */
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106 char tokenbuf[256];
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107 line_t herelines; /* number of lines in here-doc */
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108 line_t preambling; /* line # when processing $ENV{PERL5DB} */
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109 U8 lex_fakeeof; /* precedence at which to fake EOF */
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110 U8 lex_flags;
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111 PERL_BITFIELD16 in_pod:1; /* lexer is within a =pod section */
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112 PERL_BITFIELD16 filtered:1; /* source filters in evalbytes */
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113 PERL_BITFIELD16 saw_infix_sigil:1; /* saw & or * or % operator */
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114 PERL_BITFIELD16 parsed_sub:1; /* last thing parsed was a sub */
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115 } yy_parser;
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116
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117 /* flags for lexer API */
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118 #define LEX_STUFF_UTF8 0x00000001
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119 #define LEX_KEEP_PREVIOUS 0x00000002
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120
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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121 #ifdef PERL_CORE
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122 # define LEX_START_SAME_FILTER 0x00000001
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123 # define LEX_IGNORE_UTF8_HINTS 0x00000002
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124 # define LEX_EVALBYTES 0x00000004
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125 # define LEX_START_COPIED 0x00000008
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126 # define LEX_DONT_CLOSE_RSFP 0x00000010
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127 # define LEX_START_FLAGS \
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128 (LEX_START_SAME_FILTER|LEX_START_COPIED \
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129 |LEX_IGNORE_UTF8_HINTS|LEX_EVALBYTES|LEX_DONT_CLOSE_RSFP)
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130 #endif
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131
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132 /* flags for parser API */
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133 #define PARSE_OPTIONAL 0x00000001
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134
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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135 /* values for lex_fakeeof */
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136 enum {
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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137 LEX_FAKEEOF_NEVER, /* don't fake EOF */
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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138 LEX_FAKEEOF_CLOSING, /* fake EOF at unmatched closing punctuation */
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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139 LEX_FAKEEOF_NONEXPR, /* ... and at token that can't be in expression */
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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140 LEX_FAKEEOF_LOWLOGIC, /* ... and at low-precedence logic operator */
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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141 LEX_FAKEEOF_COMMA, /* ... and at comma */
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142 LEX_FAKEEOF_ASSIGN, /* ... and at assignment operator */
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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143 LEX_FAKEEOF_IFELSE, /* ... and at ?: operator */
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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144 LEX_FAKEEOF_RANGE, /* ... and at range operator */
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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145 LEX_FAKEEOF_LOGIC, /* ... and at logic operator */
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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146 LEX_FAKEEOF_BITWISE, /* ... and at bitwise operator */
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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147 LEX_FAKEEOF_COMPARE, /* ... and at comparison operator */
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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148 LEX_FAKEEOF_MAX
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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149 };
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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150
a16537d2fe07 <xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
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151 /*
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152 * ex: set ts=8 sts=4 sw=4 et:
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153 */