[b87a5ed] | 1 | /*
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| 2 | * Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
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| 3 | *
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| 4 | * The contents of this file are covered under the licence agreement in the
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| 5 | * file "LICENCE" distributed with Cforall.
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[8f60f0b] | 6 | *
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[6016c87] | 7 | * lex.ll --
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[8f60f0b] | 8 | *
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[51b73452] | 9 | * Author : Peter A. Buhr
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| 10 | * Created On : Sat Sep 22 08:58:10 2001
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[926af74] | 11 | * Last Modified By : Peter A. Buhr
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[553772b] | 12 | * Last Modified On : Wed May 15 21:25:27 2019
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| 13 | * Update Count : 708
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[51b73452] | 14 | */
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| 15 |
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| 16 | %option yylineno
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[4e9c7c1] | 17 | %option noyywrap
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[5f2f2d7] | 18 | %option nounput
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[51b73452] | 19 |
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| 20 | %{
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[9ed4f94] | 21 | // The lexer assumes the program has been preprocessed by cpp. Hence, all user level preprocessor directive have been
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[de62360d] | 22 | // performed and removed from the source. The only exceptions are preprocessor directives passed to the compiler (e.g.,
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| 23 | // line-number directives) and C/C++ style comments, which are ignored.
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[51b73452] | 24 |
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[8c17ab0] | 25 | //**************************** Includes and Defines ****************************
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[51b73452] | 26 |
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[4439008] | 27 | // trigger before each matching rule's action
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| 28 | #define YY_USER_ACTION \
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| 29 | yylloc.first_line = yylineno; \
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| 30 | yylloc.first_column = column; \
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| 31 | column += yyleng; \
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| 32 | yylloc.last_column = column; \
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| 33 | yylloc.last_line = yylineno; \
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| 34 | yylloc.filename = yyfilename ? yyfilename : "";
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[9ed4f94] | 35 | unsigned int column = 0; // position of the end of the last token parsed
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| 36 |
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[51b73452] | 37 | #include <string>
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[f487962] | 38 | #include <cstdio> // FILENAME_MAX
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[9ed4f94] | 39 | using namespace std;
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[51b73452] | 40 |
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[ba01b14] | 41 | #include "config.h" // configure info
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[984dce6] | 42 | #include "ParseNode.h"
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| 43 | #include "TypedefTable.h"
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[51b73452] | 44 |
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| 45 | char *yyfilename;
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[9ed4f94] | 46 | string *strtext; // accumulate parts of character and string constant value
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[51b73452] | 47 |
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[de62360d] | 48 | #define RETURN_LOCN(x) yylval.tok.loc.file = yyfilename; yylval.tok.loc.line = yylineno; return( x )
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[9ed4f94] | 49 | #define RETURN_VAL(x) yylval.tok.str = new string( yytext ); RETURN_LOCN( x )
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[926af74] | 50 | #define RETURN_CHAR(x) yylval.tok.str = nullptr; RETURN_LOCN( x )
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[de62360d] | 51 | #define RETURN_STR(x) yylval.tok.str = strtext; RETURN_LOCN( x )
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[5f2f2d7] | 52 |
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[f487962] | 53 | #define WHITE_RETURN(x) // do nothing
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[9ed4f94] | 54 | #define NEWLINE_RETURN() column = 0; WHITE_RETURN( '\n' )
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[de62360d] | 55 | #define ASCIIOP_RETURN() RETURN_CHAR( (int)yytext[0] ) // single character operator
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[f487962] | 56 | #define NAMEDOP_RETURN(x) RETURN_CHAR( x ) // multichar operator, with a name
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[de62360d] | 57 | #define NUMERIC_RETURN(x) rm_underscore(); RETURN_VAL( x ) // numeric constant
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| 58 | #define KEYWORD_RETURN(x) RETURN_CHAR( x ) // keyword
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[4439008] | 59 | #define QKEYWORD_RETURN(x) RETURN_VAL(x); // quasi-keyword
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[984dce6] | 60 | #define IDENTIFIER_RETURN() RETURN_VAL( typedefTable.isKind( yytext ) )
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[de62360d] | 61 | #define ATTRIBUTE_RETURN() RETURN_VAL( ATTR_IDENTIFIER )
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[51b73452] | 62 |
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[ba01b14] | 63 | #ifdef HAVE_KEYWORDS_FLOATXX // GCC >= 7 => keyword, otherwise typedef
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| 64 | #define FLOATXX(v) KEYWORD_RETURN(v);
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| 65 | #else
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| 66 | #define FLOATXX(v) IDENTIFIER_RETURN();
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| 67 | #endif // HAVE_KEYWORDS_FLOATXX
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| 68 |
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[3848e0e] | 69 | void rm_underscore() {
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[7e419e7] | 70 | // SKULLDUGGERY: remove underscores (ok to shorten?)
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[e7aed49] | 71 | yyleng = 0;
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[7e419e7] | 72 | for ( int i = 0; yytext[i] != '\0'; i += 1 ) { // copying non-underscore characters to front of string
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[b87a5ed] | 73 | if ( yytext[i] != '_' ) {
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[e7aed49] | 74 | yytext[yyleng] = yytext[i];
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| 75 | yyleng += 1;
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[b87a5ed] | 76 | } // if
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| 77 | } // for
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| 78 | yytext[yyleng] = '\0';
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[7e419e7] | 79 | } // rm_underscore
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[51b73452] | 80 |
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[7812f1d1] | 81 | // Stop warning due to incorrectly generated flex code.
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| 82 | #pragma GCC diagnostic ignored "-Wsign-compare"
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[51b73452] | 83 | %}
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| 84 |
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[0a2168f] | 85 | binary [0-1]
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[51b73452] | 86 | octal [0-7]
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| 87 | nonzero [1-9]
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| 88 | decimal [0-9]
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| 89 | hex [0-9a-fA-F]
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[3848e0e] | 90 | universal_char "\\"((u"_"?{hex_quad})|(U"_"?{hex_quad}{2}))
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[51b73452] | 91 |
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[b87a5ed] | 92 | // identifier, GCC: $ in identifier
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[51b73452] | 93 | identifier ([a-zA-Z_$]|{universal_char})([0-9a-zA-Z_$]|{universal_char})*
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| 94 |
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[b87a5ed] | 95 | // attribute identifier, GCC: $ in identifier
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[51b73452] | 96 | attr_identifier "@"{identifier}
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| 97 |
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[b87a5ed] | 98 | // numeric constants, CFA: '_' in constant
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[3848e0e] | 99 | hex_quad {hex}("_"?{hex}){3}
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[201aeb9] | 100 | size_opt (8|16|32|64|128)?
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[0a616e0] | 101 | // CFA: explicit l8/l16/l32/l64/l128, char 'hh', short 'h', int 'n'
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[f56c32e] | 102 | length ("ll"|"LL"|[lL]{size_opt})|("hh"|"HH"|[hHnN])
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[0a616e0] | 103 | // CFA: size_t 'z', pointer 'p', which define a sign and length
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| 104 | integer_suffix_opt ("_"?(([uU]({length}?[iI]?)|([iI]{length}))|([iI]({length}?[uU]?)|([uU]{length}))|({length}([iI]?[uU]?)|([uU][iI]))|[zZ]|[pP]))?
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[51b73452] | 105 |
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| 106 | octal_digits ({octal})|({octal}({octal}|"_")*{octal})
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| 107 | octal_prefix "0""_"?
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[930f69e] | 108 | octal_constant (("0")|({octal_prefix}{octal_digits})){integer_suffix_opt}
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[51b73452] | 109 |
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| 110 | nonzero_digits ({nonzero})|({nonzero}({decimal}|"_")*{decimal})
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[930f69e] | 111 | decimal_constant {nonzero_digits}{integer_suffix_opt}
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[51b73452] | 112 |
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[0a2168f] | 113 | binary_digits ({binary})|({binary}({binary}|"_")*{binary})
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| 114 | binary_prefix "0"[bB]"_"?
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| 115 | binary_constant {binary_prefix}{binary_digits}{integer_suffix_opt}
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| 116 |
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[51b73452] | 117 | hex_digits ({hex})|({hex}({hex}|"_")*{hex})
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| 118 | hex_prefix "0"[xX]"_"?
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[930f69e] | 119 | hex_constant {hex_prefix}{hex_digits}{integer_suffix_opt}
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[51b73452] | 120 |
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[76c62b2] | 121 | // GCC: D (double) and iI (imaginary) suffixes, and DL (long double)
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[51b73452] | 122 | exponent "_"?[eE]"_"?[+-]?{decimal_digits}
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[ba01b14] | 123 | floating_size 16|32|32x|64|64x|80|128|128x
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| 124 | floating_length ([fFdDlLwWqQ]|[fF]{floating_size})
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[201aeb9] | 125 | floating_suffix ({floating_length}?[iI]?)|([iI]{floating_length})
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[dc7db63] | 126 | floating_suffix_opt ("_"?({floating_suffix}|"DL"))?
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[f4b77f2] | 127 | decimal_digits ({decimal})|({decimal}({decimal}|"_")*{decimal})
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[930f69e] | 128 | floating_decimal {decimal_digits}"."{exponent}?{floating_suffix_opt}
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| 129 | floating_fraction "."{decimal_digits}{exponent}?{floating_suffix_opt}
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| 130 | floating_constant ({decimal_digits}{exponent}{floating_suffix_opt})|({decimal_digits}{floating_fraction})
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[51b73452] | 131 |
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| 132 | binary_exponent "_"?[pP]"_"?[+-]?{decimal_digits}
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[dc7db63] | 133 | hex_floating_suffix_opt ("_"?({floating_suffix}))?
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[930f69e] | 134 | hex_floating_fraction ({hex_digits}?"."{hex_digits})|({hex_digits}".")
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[f4b77f2] | 135 | hex_floating_constant {hex_prefix}(({hex_floating_fraction}{binary_exponent})|({hex_digits}{binary_exponent})){hex_floating_suffix_opt}
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[51b73452] | 136 |
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[b87a5ed] | 137 | // character escape sequence, GCC: \e => esc character
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[51b73452] | 138 | simple_escape "\\"[abefnrtv'"?\\]
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[930f69e] | 139 | // ' stop editor highlighting
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[3848e0e] | 140 | octal_escape "\\"{octal}("_"?{octal}){0,2}
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| 141 | hex_escape "\\""x""_"?{hex_digits}
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[51b73452] | 142 | escape_seq {simple_escape}|{octal_escape}|{hex_escape}|{universal_char}
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[59db689] | 143 | cwide_prefix "L"|"U"|"u"
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| 144 | swide_prefix {cwide_prefix}|"u8"
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[51b73452] | 145 |
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[b87a5ed] | 146 | // display/white-space characters
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[51b73452] | 147 | h_tab [\011]
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| 148 | form_feed [\014]
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| 149 | v_tab [\013]
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| 150 | c_return [\015]
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| 151 | h_white [ ]|{h_tab}
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| 152 |
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[e7aed49] | 153 | // overloadable operators
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[51b73452] | 154 | op_unary_only "~"|"!"
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| 155 | op_unary_binary "+"|"-"|"*"
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| 156 | op_unary_pre_post "++"|"--"
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| 157 | op_unary {op_unary_only}|{op_unary_binary}|{op_unary_pre_post}
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| 158 |
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[994d080] | 159 | op_binary_only "/"|"%"|"\\"|"^"|"&"|"|"|"<"|">"|"="|"=="|"!="|"<<"|">>"|"<="|">="|"+="|"-="|"*="|"/="|"%="|"\\="|"&="|"|="|"^="|"<<="|">>="
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[51b73452] | 160 | op_binary_over {op_unary_binary}|{op_binary_only}
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[e7aed49] | 161 | // op_binary_not_over "?"|"->"|"."|"&&"|"||"|"@="
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| 162 | // operator {op_unary_pre_post}|{op_binary_over}|{op_binary_not_over}
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[51b73452] | 163 |
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| 164 | %x COMMENT
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[3848e0e] | 165 | %x BKQUOTE
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| 166 | %x QUOTE
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| 167 | %x STRING
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[51b73452] | 168 |
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| 169 | %%
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[994d080] | 170 | /* line directives */
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[4040425] | 171 | ^{h_white}*"#"{h_white}*[0-9]+{h_white}*["][^"\n]+["].*"\n" {
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[930f69e] | 172 | /* " stop editor highlighting */
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[c1c1112] | 173 | static char filename[FILENAME_MAX]; // temporarily store current source-file name
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[51b73452] | 174 | char *end_num;
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| 175 | char *begin_string, *end_string;
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| 176 | long lineno, length;
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| 177 | lineno = strtol( yytext + 1, &end_num, 0 );
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| 178 | begin_string = strchr( end_num, '"' );
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[f487962] | 179 | if ( begin_string ) { // file name ?
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| 180 | end_string = strchr( begin_string + 1, '"' ); // look for ending delimiter
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| 181 | assert( end_string ); // closing quote ?
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| 182 | length = end_string - begin_string - 1; // file-name length without quotes or sentinel
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| 183 | assert( length < FILENAME_MAX ); // room for sentinel ?
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| 184 | memcpy( &filename, begin_string + 1, length ); // copy file name from yytext
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| 185 | filename[ length ] = '\0'; // terminate string with sentinel
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[9ed4f94] | 186 | //cout << "file " << filename << " line " << lineno << endl;
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[f487962] | 187 | yylineno = lineno;
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[c1c1112] | 188 | yyfilename = filename;
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[b87a5ed] | 189 | } // if
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[51b73452] | 190 | }
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| 191 |
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[637dd9c] | 192 | /* preprocessor-style directives */
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[61fc4f6] | 193 | ^{h_white}*"#"[^\n]*"\n" { RETURN_VAL( DIRECTIVE ); }
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[51b73452] | 194 |
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[cd623a4] | 195 | /* ignore C style comments (ALSO HANDLED BY CPP) */
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[3848e0e] | 196 | "/*" { BEGIN COMMENT; }
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[cd623a4] | 197 | <COMMENT>.|\n ;
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| 198 | <COMMENT>"*/" { BEGIN 0; }
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[51b73452] | 199 |
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[cd623a4] | 200 | /* ignore C++ style comments (ALSO HANDLED BY CPP) */
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| 201 | "//"[^\n]*"\n" ;
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[51b73452] | 202 |
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[b87a5ed] | 203 | /* ignore whitespace */
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[3848e0e] | 204 | {h_white}+ { WHITE_RETURN(' '); }
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| 205 | ({v_tab}|{c_return}|{form_feed})+ { WHITE_RETURN(' '); }
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| 206 | ({h_white}|{v_tab}|{c_return}|{form_feed})*"\n" { NEWLINE_RETURN(); }
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[51b73452] | 207 |
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[b87a5ed] | 208 | /* keywords */
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| 209 | _Alignas { KEYWORD_RETURN(ALIGNAS); } // C11
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| 210 | _Alignof { KEYWORD_RETURN(ALIGNOF); } // C11
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| 211 | __alignof { KEYWORD_RETURN(ALIGNOF); } // GCC
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| 212 | __alignof__ { KEYWORD_RETURN(ALIGNOF); } // GCC
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| 213 | asm { KEYWORD_RETURN(ASM); }
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| 214 | __asm { KEYWORD_RETURN(ASM); } // GCC
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| 215 | __asm__ { KEYWORD_RETURN(ASM); } // GCC
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| 216 | _Atomic { KEYWORD_RETURN(ATOMIC); } // C11
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| 217 | __attribute { KEYWORD_RETURN(ATTRIBUTE); } // GCC
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| 218 | __attribute__ { KEYWORD_RETURN(ATTRIBUTE); } // GCC
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[3848e0e] | 219 | auto { KEYWORD_RETURN(AUTO); }
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[b6ad601] | 220 | basetypeof { KEYWORD_RETURN(BASETYPEOF); } // CFA
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[b87a5ed] | 221 | _Bool { KEYWORD_RETURN(BOOL); } // C99
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[3848e0e] | 222 | break { KEYWORD_RETURN(BREAK); }
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| 223 | case { KEYWORD_RETURN(CASE); }
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[b87a5ed] | 224 | catch { KEYWORD_RETURN(CATCH); } // CFA
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[02e5ab6] | 225 | catchResume { KEYWORD_RETURN(CATCHRESUME); } // CFA
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[3848e0e] | 226 | char { KEYWORD_RETURN(CHAR); }
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[b87a5ed] | 227 | choose { KEYWORD_RETURN(CHOOSE); } // CFA
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[1528a2c] | 228 | coerce { KEYWORD_RETURN(COERCE); } // CFA
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[b87a5ed] | 229 | _Complex { KEYWORD_RETURN(COMPLEX); } // C99
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| 230 | __complex { KEYWORD_RETURN(COMPLEX); } // GCC
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| 231 | __complex__ { KEYWORD_RETURN(COMPLEX); } // GCC
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[3848e0e] | 232 | const { KEYWORD_RETURN(CONST); }
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[b87a5ed] | 233 | __const { KEYWORD_RETURN(CONST); } // GCC
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| 234 | __const__ { KEYWORD_RETURN(CONST); } // GCC
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[3848e0e] | 235 | continue { KEYWORD_RETURN(CONTINUE); }
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[e04b636] | 236 | coroutine { KEYWORD_RETURN(COROUTINE); } // CFA
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[3848e0e] | 237 | default { KEYWORD_RETURN(DEFAULT); }
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[02e5ab6] | 238 | disable { KEYWORD_RETURN(DISABLE); } // CFA
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[b87a5ed] | 239 | do { KEYWORD_RETURN(DO); }
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[3848e0e] | 240 | double { KEYWORD_RETURN(DOUBLE); }
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[b87a5ed] | 241 | dtype { KEYWORD_RETURN(DTYPE); } // CFA
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[3848e0e] | 242 | else { KEYWORD_RETURN(ELSE); }
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[02e5ab6] | 243 | enable { KEYWORD_RETURN(ENABLE); } // CFA
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[3848e0e] | 244 | enum { KEYWORD_RETURN(ENUM); }
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[b87a5ed] | 245 | __extension__ { KEYWORD_RETURN(EXTENSION); } // GCC
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[c27fb59] | 246 | exception { KEYWORD_RETURN(EXCEPTION); } // CFA
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[3848e0e] | 247 | extern { KEYWORD_RETURN(EXTERN); }
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[bd7f401] | 248 | fallthrough { KEYWORD_RETURN(FALLTHROUGH); } // CFA
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[35f730f] | 249 | fallthru { KEYWORD_RETURN(FALLTHRU); } // CFA
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[b87a5ed] | 250 | finally { KEYWORD_RETURN(FINALLY); } // CFA
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[3848e0e] | 251 | float { KEYWORD_RETURN(FLOAT); }
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[e15853c] | 252 | __float80 { KEYWORD_RETURN(uuFLOAT80); } // GCC
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| 253 | float80 { KEYWORD_RETURN(uuFLOAT80); } // GCC
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| 254 | __float128 { KEYWORD_RETURN(uuFLOAT128); } // GCC
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| 255 | float128 { KEYWORD_RETURN(uuFLOAT128); } // GCC
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| 256 | _Float16 { FLOATXX(uFLOAT16); } // GCC
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| 257 | _Float32 { FLOATXX(uFLOAT32); } // GCC
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| 258 | _Float32x { FLOATXX(uFLOAT32X); } // GCC
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| 259 | _Float64 { FLOATXX(uFLOAT64); } // GCC
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| 260 | _Float64x { FLOATXX(uFLOAT64X); } // GCC
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| 261 | _Float128 { FLOATXX(uFLOAT128); } // GCC
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| 262 | _Float128x { FLOATXX(uFLOAT128); } // GCC
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[b87a5ed] | 263 | for { KEYWORD_RETURN(FOR); }
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| 264 | forall { KEYWORD_RETURN(FORALL); } // CFA
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[3848e0e] | 265 | fortran { KEYWORD_RETURN(FORTRAN); }
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[b87a5ed] | 266 | ftype { KEYWORD_RETURN(FTYPE); } // CFA
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[553772b] | 267 | generator { KEYWORD_RETURN(GENERATOR); } // CFA
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[b87a5ed] | 268 | _Generic { KEYWORD_RETURN(GENERIC); } // C11
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[3848e0e] | 269 | goto { KEYWORD_RETURN(GOTO); }
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[b87a5ed] | 270 | if { KEYWORD_RETURN(IF); }
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| 271 | _Imaginary { KEYWORD_RETURN(IMAGINARY); } // C99
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| 272 | __imag { KEYWORD_RETURN(IMAGINARY); } // GCC
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| 273 | __imag__ { KEYWORD_RETURN(IMAGINARY); } // GCC
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| 274 | inline { KEYWORD_RETURN(INLINE); } // C99
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| 275 | __inline { KEYWORD_RETURN(INLINE); } // GCC
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| 276 | __inline__ { KEYWORD_RETURN(INLINE); } // GCC
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| 277 | int { KEYWORD_RETURN(INT); }
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[201aeb9] | 278 | __int128 { KEYWORD_RETURN(INT128); } // GCC
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| 279 | int128 { KEYWORD_RETURN(INT128); } // GCC
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[b87a5ed] | 280 | __label__ { KEYWORD_RETURN(LABEL); } // GCC
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[3848e0e] | 281 | long { KEYWORD_RETURN(LONG); }
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[6016c87] | 282 | monitor { KEYWORD_RETURN(MONITOR); } // CFA
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[a7c90d4] | 283 | mutex { KEYWORD_RETURN(MUTEX); } // CFA
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[b87a5ed] | 284 | _Noreturn { KEYWORD_RETURN(NORETURN); } // C11
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[5721a6d] | 285 | __builtin_offsetof { KEYWORD_RETURN(OFFSETOF); } // GCC
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[3a2128f] | 286 | one_t { NUMERIC_RETURN(ONE_T); } // CFA
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[ce28c7b] | 287 | or { QKEYWORD_RETURN(WOR); } // CFA
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[4040425] | 288 | otype { KEYWORD_RETURN(OTYPE); } // CFA
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[3848e0e] | 289 | register { KEYWORD_RETURN(REGISTER); }
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[b87a5ed] | 290 | restrict { KEYWORD_RETURN(RESTRICT); } // C99
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| 291 | __restrict { KEYWORD_RETURN(RESTRICT); } // GCC
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| 292 | __restrict__ { KEYWORD_RETURN(RESTRICT); } // GCC
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[3848e0e] | 293 | return { KEYWORD_RETURN(RETURN); }
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| 294 | short { KEYWORD_RETURN(SHORT); }
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| 295 | signed { KEYWORD_RETURN(SIGNED); }
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[b87a5ed] | 296 | __signed { KEYWORD_RETURN(SIGNED); } // GCC
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| 297 | __signed__ { KEYWORD_RETURN(SIGNED); } // GCC
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[3848e0e] | 298 | sizeof { KEYWORD_RETURN(SIZEOF); }
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| 299 | static { KEYWORD_RETURN(STATIC); }
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[b87a5ed] | 300 | _Static_assert { KEYWORD_RETURN(STATICASSERT); } // C11
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[3848e0e] | 301 | struct { KEYWORD_RETURN(STRUCT); }
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| 302 | switch { KEYWORD_RETURN(SWITCH); }
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[bd4d011] | 303 | thread { KEYWORD_RETURN(THREAD); } // C11
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[b87a5ed] | 304 | _Thread_local { KEYWORD_RETURN(THREADLOCAL); } // C11
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| 305 | throw { KEYWORD_RETURN(THROW); } // CFA
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[02e5ab6] | 306 | throwResume { KEYWORD_RETURN(THROWRESUME); } // CFA
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[5b2edbc] | 307 | timeout { QKEYWORD_RETURN(TIMEOUT); } // CFA
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[4040425] | 308 | trait { KEYWORD_RETURN(TRAIT); } // CFA
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[b87a5ed] | 309 | try { KEYWORD_RETURN(TRY); } // CFA
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[8f60f0b] | 310 | ttype { KEYWORD_RETURN(TTYPE); } // CFA
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[3848e0e] | 311 | typedef { KEYWORD_RETURN(TYPEDEF); }
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[b87a5ed] | 312 | typeof { KEYWORD_RETURN(TYPEOF); } // GCC
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| 313 | __typeof { KEYWORD_RETURN(TYPEOF); } // GCC
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| 314 | __typeof__ { KEYWORD_RETURN(TYPEOF); } // GCC
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[3848e0e] | 315 | union { KEYWORD_RETURN(UNION); }
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| 316 | unsigned { KEYWORD_RETURN(UNSIGNED); }
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[90c3b1c] | 317 | __builtin_va_list { KEYWORD_RETURN(VALIST); } // GCC
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[72457b6] | 318 | virtual { KEYWORD_RETURN(VIRTUAL); } // CFA
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[3848e0e] | 319 | void { KEYWORD_RETURN(VOID); }
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| 320 | volatile { KEYWORD_RETURN(VOLATILE); }
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[b87a5ed] | 321 | __volatile { KEYWORD_RETURN(VOLATILE); } // GCC
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| 322 | __volatile__ { KEYWORD_RETURN(VOLATILE); } // GCC
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[5b2edbc] | 323 | waitfor { KEYWORD_RETURN(WAITFOR); }
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| 324 | when { KEYWORD_RETURN(WHEN); }
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[3848e0e] | 325 | while { KEYWORD_RETURN(WHILE); }
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[8b47e50] | 326 | with { KEYWORD_RETURN(WITH); } // CFA
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[3a2128f] | 327 | zero_t { NUMERIC_RETURN(ZERO_T); } // CFA
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[51b73452] | 328 |
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[b87a5ed] | 329 | /* identifier */
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| 330 | {identifier} { IDENTIFIER_RETURN(); }
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[7e419e7] | 331 | "`"{identifier}"`" { // CFA
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| 332 | yytext[yyleng - 1] = '\0'; yytext += 1; // SKULLDUGGERY: remove backquotes (ok to shorten?)
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[dc7db63] | 333 | IDENTIFIER_RETURN();
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| 334 | }
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[b87a5ed] | 335 | {attr_identifier} { ATTRIBUTE_RETURN(); }
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[51b73452] | 336 |
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[b87a5ed] | 337 | /* numeric constants */
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[0a2168f] | 338 | {binary_constant} { NUMERIC_RETURN(INTEGERconstant); }
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[59db689] | 339 | {octal_constant} { NUMERIC_RETURN(INTEGERconstant); }
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[0a2168f] | 340 | {decimal_constant} { NUMERIC_RETURN(INTEGERconstant); }
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[59db689] | 341 | {hex_constant} { NUMERIC_RETURN(INTEGERconstant); }
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[930f69e] | 342 | {floating_decimal} { NUMERIC_RETURN(FLOATING_DECIMALconstant); } // must appear before floating_constant
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| 343 | {floating_fraction} { NUMERIC_RETURN(FLOATING_FRACTIONconstant); } // must appear before floating_constant
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[3848e0e] | 344 | {floating_constant} { NUMERIC_RETURN(FLOATINGconstant); }
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| 345 | {hex_floating_constant} { NUMERIC_RETURN(FLOATINGconstant); }
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[51b73452] | 346 |
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[b87a5ed] | 347 | /* character constant, allows empty value */
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[9ed4f94] | 348 | ({cwide_prefix}[_]?)?['] { BEGIN QUOTE; rm_underscore(); strtext = new string( yytext, yyleng ); }
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[c1c1112] | 349 | <QUOTE>[^'\\\n]* { strtext->append( yytext, yyleng ); }
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[dc7db63] | 350 | <QUOTE>['\n] { BEGIN 0; strtext->append( yytext, yyleng ); RETURN_STR(CHARACTERconstant); }
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[930f69e] | 351 | /* ' stop editor highlighting */
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[51b73452] | 352 |
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[b87a5ed] | 353 | /* string constant */
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[9ed4f94] | 354 | ({swide_prefix}[_]?)?["] { BEGIN STRING; rm_underscore(); strtext = new string( yytext, yyleng ); }
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[c1c1112] | 355 | <STRING>[^"\\\n]* { strtext->append( yytext, yyleng ); }
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[dc7db63] | 356 | <STRING>["\n] { BEGIN 0; strtext->append( yytext, yyleng ); RETURN_STR(STRINGliteral); }
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[930f69e] | 357 | /* " stop editor highlighting */
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[51b73452] | 358 |
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[59db689] | 359 | /* common character/string constant */
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[c1c1112] | 360 | <QUOTE,STRING>{escape_seq} { rm_underscore(); strtext->append( yytext, yyleng ); }
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[cd623a4] | 361 | <QUOTE,STRING>"\\"{h_white}*"\n" {} // continuation (ALSO HANDLED BY CPP)
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[c1c1112] | 362 | <QUOTE,STRING>"\\" { strtext->append( yytext, yyleng ); } // unknown escape character
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[3848e0e] | 363 |
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[b87a5ed] | 364 | /* punctuation */
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[615a096] | 365 | "@" { ASCIIOP_RETURN(); }
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[dc7db63] | 366 | "`" { ASCIIOP_RETURN(); }
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[b87a5ed] | 367 | "[" { ASCIIOP_RETURN(); }
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| 368 | "]" { ASCIIOP_RETURN(); }
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| 369 | "(" { ASCIIOP_RETURN(); }
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| 370 | ")" { ASCIIOP_RETURN(); }
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| 371 | "{" { ASCIIOP_RETURN(); }
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| 372 | "}" { ASCIIOP_RETURN(); }
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| 373 | "," { ASCIIOP_RETURN(); } // also operator
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| 374 | ":" { ASCIIOP_RETURN(); }
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| 375 | ";" { ASCIIOP_RETURN(); }
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| 376 | "." { ASCIIOP_RETURN(); } // also operator
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[3848e0e] | 377 | "..." { NAMEDOP_RETURN(ELLIPSIS); }
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| 378 |
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[b87a5ed] | 379 | /* alternative C99 brackets, "<:" & "<:<:" handled by preprocessor */
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[3848e0e] | 380 | "<:" { RETURN_VAL('['); }
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| 381 | ":>" { RETURN_VAL(']'); }
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| 382 | "<%" { RETURN_VAL('{'); }
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| 383 | "%>" { RETURN_VAL('}'); }
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[51b73452] | 384 |
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[b87a5ed] | 385 | /* operators */
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| 386 | "!" { ASCIIOP_RETURN(); }
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| 387 | "+" { ASCIIOP_RETURN(); }
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| 388 | "-" { ASCIIOP_RETURN(); }
|
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| 389 | "*" { ASCIIOP_RETURN(); }
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[e5f2a67] | 390 | "\\" { ASCIIOP_RETURN(); } // CFA, exponentiation
|
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[b87a5ed] | 391 | "/" { ASCIIOP_RETURN(); }
|
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| 392 | "%" { ASCIIOP_RETURN(); }
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| 393 | "^" { ASCIIOP_RETURN(); }
|
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| 394 | "~" { ASCIIOP_RETURN(); }
|
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| 395 | "&" { ASCIIOP_RETURN(); }
|
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| 396 | "|" { ASCIIOP_RETURN(); }
|
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| 397 | "<" { ASCIIOP_RETURN(); }
|
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| 398 | ">" { ASCIIOP_RETURN(); }
|
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| 399 | "=" { ASCIIOP_RETURN(); }
|
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| 400 | "?" { ASCIIOP_RETURN(); }
|
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[3848e0e] | 401 |
|
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| 402 | "++" { NAMEDOP_RETURN(ICR); }
|
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| 403 | "--" { NAMEDOP_RETURN(DECR); }
|
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| 404 | "==" { NAMEDOP_RETURN(EQ); }
|
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| 405 | "!=" { NAMEDOP_RETURN(NE); }
|
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| 406 | "<<" { NAMEDOP_RETURN(LS); }
|
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| 407 | ">>" { NAMEDOP_RETURN(RS); }
|
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| 408 | "<=" { NAMEDOP_RETURN(LE); }
|
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| 409 | ">=" { NAMEDOP_RETURN(GE); }
|
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| 410 | "&&" { NAMEDOP_RETURN(ANDAND); }
|
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| 411 | "||" { NAMEDOP_RETURN(OROR); }
|
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| 412 | "->" { NAMEDOP_RETURN(ARROW); }
|
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| 413 | "+=" { NAMEDOP_RETURN(PLUSassign); }
|
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| 414 | "-=" { NAMEDOP_RETURN(MINUSassign); }
|
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[e5f2a67] | 415 | "\\=" { NAMEDOP_RETURN(EXPassign); } // CFA, exponentiation
|
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[3848e0e] | 416 | "*=" { NAMEDOP_RETURN(MULTassign); }
|
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| 417 | "/=" { NAMEDOP_RETURN(DIVassign); }
|
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| 418 | "%=" { NAMEDOP_RETURN(MODassign); }
|
---|
| 419 | "&=" { NAMEDOP_RETURN(ANDassign); }
|
---|
| 420 | "|=" { NAMEDOP_RETURN(ORassign); }
|
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| 421 | "^=" { NAMEDOP_RETURN(ERassign); }
|
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| 422 | "<<=" { NAMEDOP_RETURN(LSassign); }
|
---|
| 423 | ">>=" { NAMEDOP_RETURN(RSassign); }
|
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[51b73452] | 424 |
|
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[08061589] | 425 | "@=" { NAMEDOP_RETURN(ATassign); } // CFA
|
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[d69f4bb4] | 426 | "~=" { NAMEDOP_RETURN(ErangeUpEq); } // CFA
|
---|
| 427 | "-~" { NAMEDOP_RETURN(ErangeDown); } // CFA
|
---|
| 428 | "-~=" { NAMEDOP_RETURN(ErangeDownEq); } // CFA
|
---|
[097e2b0] | 429 |
|
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[b87a5ed] | 430 | /* CFA, operator identifier */
|
---|
| 431 | {op_unary}"?" { IDENTIFIER_RETURN(); } // unary
|
---|
[a61fea9a] | 432 | "?"({op_unary_pre_post}|"()"|"[?]"|"{}") { IDENTIFIER_RETURN(); }
|
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[76c62b2] | 433 | "^?{}" { IDENTIFIER_RETURN(); }
|
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[7e419e7] | 434 | "?`"{identifier} { IDENTIFIER_RETURN(); } // postfix operator
|
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[b87a5ed] | 435 | "?"{op_binary_over}"?" { IDENTIFIER_RETURN(); } // binary
|
---|
[51b73452] | 436 | /*
|
---|
[daf9671] | 437 | This rule handles ambiguous cases with operator identifiers, e.g., "int *?*?()", where the string "*?*?" can be
|
---|
| 438 | lexed as "*?"/"*?" or "*"/"?*?". Since it is common practise to put a unary operator juxtaposed to an identifier,
|
---|
| 439 | e.g., "*i", users will be annoyed if they cannot do this with respect to operator identifiers. Therefore, there is
|
---|
| 440 | a lexical look-ahead for the second case, with backtracking to return the leading unary operator and then
|
---|
| 441 | reparsing the trailing operator identifier. Otherwise a space is needed between the unary operator and operator
|
---|
| 442 | identifier to disambiguate this common case.
|
---|
| 443 |
|
---|
| 444 | A similar issue occurs with the dereference, *?(...), and routine-call, ?()(...) identifiers. The ambiguity
|
---|
| 445 | occurs when the deference operator has no parameters, *?() and *?()(...), requiring arbitrary whitespace
|
---|
| 446 | look-ahead for the routine-call parameter-list to disambiguate. However, the dereference operator must have a
|
---|
| 447 | parameter/argument to dereference *?(...). Hence, always interpreting the string *?() as * ?() does not preclude
|
---|
| 448 | any meaningful program.
|
---|
| 449 |
|
---|
| 450 | The remaining cases are with the increment/decrement operators and conditional expression:
|
---|
| 451 |
|
---|
| 452 | i++? ...(...);
|
---|
| 453 | i?++ ...(...);
|
---|
| 454 |
|
---|
| 455 | requiring arbitrary whitespace look-ahead for the operator parameter-list, even though that interpretation is an
|
---|
| 456 | incorrect expression (juxtaposed identifiers). Therefore, it is necessary to disambiguate these cases with a
|
---|
| 457 | space:
|
---|
| 458 |
|
---|
| 459 | i++ ? i : 0;
|
---|
| 460 | i? ++i : 0;
|
---|
[51b73452] | 461 | */
|
---|
[daf9671] | 462 | {op_unary}"?"({op_unary_pre_post}|"()"|"[?]"|{op_binary_over}"?") {
|
---|
[b87a5ed] | 463 | // 1 or 2 character unary operator ?
|
---|
| 464 | int i = yytext[1] == '?' ? 1 : 2;
|
---|
| 465 | yyless( i ); // put back characters up to first '?'
|
---|
| 466 | if ( i > 1 ) {
|
---|
| 467 | NAMEDOP_RETURN( yytext[0] == '+' ? ICR : DECR );
|
---|
| 468 | } else {
|
---|
| 469 | ASCIIOP_RETURN();
|
---|
| 470 | } // if
|
---|
| 471 | }
|
---|
| 472 |
|
---|
[9ed4f94] | 473 | /* unknown character */
|
---|
| 474 | . { yyerror( "unknown character" ); }
|
---|
[51b73452] | 475 |
|
---|
| 476 | %%
|
---|
[8551b859] | 477 |
|
---|
[9ed4f94] | 478 | // ----end of lexer----
|
---|
| 479 |
|
---|
| 480 | void yyerror( const char * errmsg ) {
|
---|
[8551b859] | 481 | SemanticErrorThrow = true;
|
---|
[a8615fd1] | 482 | cerr << (yyfilename ? yyfilename : "*unknown file*") << ':' << yylineno << ':' << column - yyleng + 1
|
---|
[a16764a6] | 483 | << ": " << ErrorHelpers::error_str() << errmsg << " at token \"" << (yytext[0] == '\0' ? "EOF" : yytext) << '"' << endl;
|
---|
[9ed4f94] | 484 | }
|
---|
[51b73452] | 485 |
|
---|
[b87a5ed] | 486 | // Local Variables: //
|
---|
| 487 | // mode: c++ //
|
---|
[de62360d] | 488 | // tab-width: 4 //
|
---|
[b87a5ed] | 489 | // compile-command: "make install" //
|
---|
| 490 | // End: //
|
---|