source: src/Parser/lex.ll@ f53acdf8

ADT arm-eh ast-experimental enum forall-pointer-decay jacob/cs343-translation new-ast new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since f53acdf8 was 553772b, checked in by Peter A. Buhr <pabuhr@…>, 6 years ago

add new type constructor "generator" with temporary coroutine semantics

  • Property mode set to 100644
File size: 19.1 KB
RevLine 
[b87a5ed]1/*
2 * Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3 *
4 * The contents of this file are covered under the licence agreement in the
5 * file "LICENCE" distributed with Cforall.
[8f60f0b]6 *
[6016c87]7 * lex.ll --
[8f60f0b]8 *
[51b73452]9 * Author : Peter A. Buhr
10 * Created On : Sat Sep 22 08:58:10 2001
[926af74]11 * Last Modified By : Peter A. Buhr
[553772b]12 * Last Modified On : Wed May 15 21:25:27 2019
13 * Update Count : 708
[51b73452]14 */
15
16%option yylineno
[4e9c7c1]17%option noyywrap
[5f2f2d7]18%option nounput
[51b73452]19
20%{
[9ed4f94]21// The lexer assumes the program has been preprocessed by cpp. Hence, all user level preprocessor directive have been
[de62360d]22// performed and removed from the source. The only exceptions are preprocessor directives passed to the compiler (e.g.,
23// line-number directives) and C/C++ style comments, which are ignored.
[51b73452]24
[8c17ab0]25//**************************** Includes and Defines ****************************
[51b73452]26
[4439008]27// trigger before each matching rule's action
28#define YY_USER_ACTION \
29 yylloc.first_line = yylineno; \
30 yylloc.first_column = column; \
31 column += yyleng; \
32 yylloc.last_column = column; \
33 yylloc.last_line = yylineno; \
34 yylloc.filename = yyfilename ? yyfilename : "";
[9ed4f94]35unsigned int column = 0; // position of the end of the last token parsed
36
[51b73452]37#include <string>
[f487962]38#include <cstdio> // FILENAME_MAX
[9ed4f94]39using namespace std;
[51b73452]40
[ba01b14]41#include "config.h" // configure info
[984dce6]42#include "ParseNode.h"
43#include "TypedefTable.h"
[51b73452]44
45char *yyfilename;
[9ed4f94]46string *strtext; // accumulate parts of character and string constant value
[51b73452]47
[de62360d]48#define RETURN_LOCN(x) yylval.tok.loc.file = yyfilename; yylval.tok.loc.line = yylineno; return( x )
[9ed4f94]49#define RETURN_VAL(x) yylval.tok.str = new string( yytext ); RETURN_LOCN( x )
[926af74]50#define RETURN_CHAR(x) yylval.tok.str = nullptr; RETURN_LOCN( x )
[de62360d]51#define RETURN_STR(x) yylval.tok.str = strtext; RETURN_LOCN( x )
[5f2f2d7]52
[f487962]53#define WHITE_RETURN(x) // do nothing
[9ed4f94]54#define NEWLINE_RETURN() column = 0; WHITE_RETURN( '\n' )
[de62360d]55#define ASCIIOP_RETURN() RETURN_CHAR( (int)yytext[0] ) // single character operator
[f487962]56#define NAMEDOP_RETURN(x) RETURN_CHAR( x ) // multichar operator, with a name
[de62360d]57#define NUMERIC_RETURN(x) rm_underscore(); RETURN_VAL( x ) // numeric constant
58#define KEYWORD_RETURN(x) RETURN_CHAR( x ) // keyword
[4439008]59#define QKEYWORD_RETURN(x) RETURN_VAL(x); // quasi-keyword
[984dce6]60#define IDENTIFIER_RETURN() RETURN_VAL( typedefTable.isKind( yytext ) )
[de62360d]61#define ATTRIBUTE_RETURN() RETURN_VAL( ATTR_IDENTIFIER )
[51b73452]62
[ba01b14]63#ifdef HAVE_KEYWORDS_FLOATXX // GCC >= 7 => keyword, otherwise typedef
64#define FLOATXX(v) KEYWORD_RETURN(v);
65#else
66#define FLOATXX(v) IDENTIFIER_RETURN();
67#endif // HAVE_KEYWORDS_FLOATXX
68
[3848e0e]69void rm_underscore() {
[7e419e7]70 // SKULLDUGGERY: remove underscores (ok to shorten?)
[e7aed49]71 yyleng = 0;
[7e419e7]72 for ( int i = 0; yytext[i] != '\0'; i += 1 ) { // copying non-underscore characters to front of string
[b87a5ed]73 if ( yytext[i] != '_' ) {
[e7aed49]74 yytext[yyleng] = yytext[i];
75 yyleng += 1;
[b87a5ed]76 } // if
77 } // for
78 yytext[yyleng] = '\0';
[7e419e7]79} // rm_underscore
[51b73452]80
[7812f1d1]81// Stop warning due to incorrectly generated flex code.
82#pragma GCC diagnostic ignored "-Wsign-compare"
[51b73452]83%}
84
[0a2168f]85binary [0-1]
[51b73452]86octal [0-7]
87nonzero [1-9]
88decimal [0-9]
89hex [0-9a-fA-F]
[3848e0e]90universal_char "\\"((u"_"?{hex_quad})|(U"_"?{hex_quad}{2}))
[51b73452]91
[b87a5ed]92 // identifier, GCC: $ in identifier
[51b73452]93identifier ([a-zA-Z_$]|{universal_char})([0-9a-zA-Z_$]|{universal_char})*
94
[b87a5ed]95 // attribute identifier, GCC: $ in identifier
[51b73452]96attr_identifier "@"{identifier}
97
[b87a5ed]98 // numeric constants, CFA: '_' in constant
[3848e0e]99hex_quad {hex}("_"?{hex}){3}
[201aeb9]100size_opt (8|16|32|64|128)?
[0a616e0]101 // CFA: explicit l8/l16/l32/l64/l128, char 'hh', short 'h', int 'n'
[f56c32e]102length ("ll"|"LL"|[lL]{size_opt})|("hh"|"HH"|[hHnN])
[0a616e0]103 // CFA: size_t 'z', pointer 'p', which define a sign and length
104integer_suffix_opt ("_"?(([uU]({length}?[iI]?)|([iI]{length}))|([iI]({length}?[uU]?)|([uU]{length}))|({length}([iI]?[uU]?)|([uU][iI]))|[zZ]|[pP]))?
[51b73452]105
106octal_digits ({octal})|({octal}({octal}|"_")*{octal})
107octal_prefix "0""_"?
[930f69e]108octal_constant (("0")|({octal_prefix}{octal_digits})){integer_suffix_opt}
[51b73452]109
110nonzero_digits ({nonzero})|({nonzero}({decimal}|"_")*{decimal})
[930f69e]111decimal_constant {nonzero_digits}{integer_suffix_opt}
[51b73452]112
[0a2168f]113binary_digits ({binary})|({binary}({binary}|"_")*{binary})
114binary_prefix "0"[bB]"_"?
115binary_constant {binary_prefix}{binary_digits}{integer_suffix_opt}
116
[51b73452]117hex_digits ({hex})|({hex}({hex}|"_")*{hex})
118hex_prefix "0"[xX]"_"?
[930f69e]119hex_constant {hex_prefix}{hex_digits}{integer_suffix_opt}
[51b73452]120
[76c62b2]121 // GCC: D (double) and iI (imaginary) suffixes, and DL (long double)
[51b73452]122exponent "_"?[eE]"_"?[+-]?{decimal_digits}
[ba01b14]123floating_size 16|32|32x|64|64x|80|128|128x
124floating_length ([fFdDlLwWqQ]|[fF]{floating_size})
[201aeb9]125floating_suffix ({floating_length}?[iI]?)|([iI]{floating_length})
[dc7db63]126floating_suffix_opt ("_"?({floating_suffix}|"DL"))?
[f4b77f2]127decimal_digits ({decimal})|({decimal}({decimal}|"_")*{decimal})
[930f69e]128floating_decimal {decimal_digits}"."{exponent}?{floating_suffix_opt}
129floating_fraction "."{decimal_digits}{exponent}?{floating_suffix_opt}
130floating_constant ({decimal_digits}{exponent}{floating_suffix_opt})|({decimal_digits}{floating_fraction})
[51b73452]131
132binary_exponent "_"?[pP]"_"?[+-]?{decimal_digits}
[dc7db63]133hex_floating_suffix_opt ("_"?({floating_suffix}))?
[930f69e]134hex_floating_fraction ({hex_digits}?"."{hex_digits})|({hex_digits}".")
[f4b77f2]135hex_floating_constant {hex_prefix}(({hex_floating_fraction}{binary_exponent})|({hex_digits}{binary_exponent})){hex_floating_suffix_opt}
[51b73452]136
[b87a5ed]137 // character escape sequence, GCC: \e => esc character
[51b73452]138simple_escape "\\"[abefnrtv'"?\\]
[930f69e]139 // ' stop editor highlighting
[3848e0e]140octal_escape "\\"{octal}("_"?{octal}){0,2}
141hex_escape "\\""x""_"?{hex_digits}
[51b73452]142escape_seq {simple_escape}|{octal_escape}|{hex_escape}|{universal_char}
[59db689]143cwide_prefix "L"|"U"|"u"
144swide_prefix {cwide_prefix}|"u8"
[51b73452]145
[b87a5ed]146 // display/white-space characters
[51b73452]147h_tab [\011]
148form_feed [\014]
149v_tab [\013]
150c_return [\015]
151h_white [ ]|{h_tab}
152
[e7aed49]153 // overloadable operators
[51b73452]154op_unary_only "~"|"!"
155op_unary_binary "+"|"-"|"*"
156op_unary_pre_post "++"|"--"
157op_unary {op_unary_only}|{op_unary_binary}|{op_unary_pre_post}
158
[994d080]159op_binary_only "/"|"%"|"\\"|"^"|"&"|"|"|"<"|">"|"="|"=="|"!="|"<<"|">>"|"<="|">="|"+="|"-="|"*="|"/="|"%="|"\\="|"&="|"|="|"^="|"<<="|">>="
[51b73452]160op_binary_over {op_unary_binary}|{op_binary_only}
[e7aed49]161 // op_binary_not_over "?"|"->"|"."|"&&"|"||"|"@="
162 // operator {op_unary_pre_post}|{op_binary_over}|{op_binary_not_over}
[51b73452]163
164%x COMMENT
[3848e0e]165%x BKQUOTE
166%x QUOTE
167%x STRING
[51b73452]168
169%%
[994d080]170 /* line directives */
[4040425]171^{h_white}*"#"{h_white}*[0-9]+{h_white}*["][^"\n]+["].*"\n" {
[930f69e]172 /* " stop editor highlighting */
[c1c1112]173 static char filename[FILENAME_MAX]; // temporarily store current source-file name
[51b73452]174 char *end_num;
175 char *begin_string, *end_string;
176 long lineno, length;
177 lineno = strtol( yytext + 1, &end_num, 0 );
178 begin_string = strchr( end_num, '"' );
[f487962]179 if ( begin_string ) { // file name ?
180 end_string = strchr( begin_string + 1, '"' ); // look for ending delimiter
181 assert( end_string ); // closing quote ?
182 length = end_string - begin_string - 1; // file-name length without quotes or sentinel
183 assert( length < FILENAME_MAX ); // room for sentinel ?
184 memcpy( &filename, begin_string + 1, length ); // copy file name from yytext
185 filename[ length ] = '\0'; // terminate string with sentinel
[9ed4f94]186 //cout << "file " << filename << " line " << lineno << endl;
[f487962]187 yylineno = lineno;
[c1c1112]188 yyfilename = filename;
[b87a5ed]189 } // if
[51b73452]190}
191
[637dd9c]192 /* preprocessor-style directives */
[61fc4f6]193^{h_white}*"#"[^\n]*"\n" { RETURN_VAL( DIRECTIVE ); }
[51b73452]194
[cd623a4]195 /* ignore C style comments (ALSO HANDLED BY CPP) */
[3848e0e]196"/*" { BEGIN COMMENT; }
[cd623a4]197<COMMENT>.|\n ;
198<COMMENT>"*/" { BEGIN 0; }
[51b73452]199
[cd623a4]200 /* ignore C++ style comments (ALSO HANDLED BY CPP) */
201"//"[^\n]*"\n" ;
[51b73452]202
[b87a5ed]203 /* ignore whitespace */
[3848e0e]204{h_white}+ { WHITE_RETURN(' '); }
205({v_tab}|{c_return}|{form_feed})+ { WHITE_RETURN(' '); }
206({h_white}|{v_tab}|{c_return}|{form_feed})*"\n" { NEWLINE_RETURN(); }
[51b73452]207
[b87a5ed]208 /* keywords */
209_Alignas { KEYWORD_RETURN(ALIGNAS); } // C11
210_Alignof { KEYWORD_RETURN(ALIGNOF); } // C11
211__alignof { KEYWORD_RETURN(ALIGNOF); } // GCC
212__alignof__ { KEYWORD_RETURN(ALIGNOF); } // GCC
213asm { KEYWORD_RETURN(ASM); }
214__asm { KEYWORD_RETURN(ASM); } // GCC
215__asm__ { KEYWORD_RETURN(ASM); } // GCC
216_Atomic { KEYWORD_RETURN(ATOMIC); } // C11
217__attribute { KEYWORD_RETURN(ATTRIBUTE); } // GCC
218__attribute__ { KEYWORD_RETURN(ATTRIBUTE); } // GCC
[3848e0e]219auto { KEYWORD_RETURN(AUTO); }
[b6ad601]220basetypeof { KEYWORD_RETURN(BASETYPEOF); } // CFA
[b87a5ed]221_Bool { KEYWORD_RETURN(BOOL); } // C99
[3848e0e]222break { KEYWORD_RETURN(BREAK); }
223case { KEYWORD_RETURN(CASE); }
[b87a5ed]224catch { KEYWORD_RETURN(CATCH); } // CFA
[02e5ab6]225catchResume { KEYWORD_RETURN(CATCHRESUME); } // CFA
[3848e0e]226char { KEYWORD_RETURN(CHAR); }
[b87a5ed]227choose { KEYWORD_RETURN(CHOOSE); } // CFA
[1528a2c]228coerce { KEYWORD_RETURN(COERCE); } // CFA
[b87a5ed]229_Complex { KEYWORD_RETURN(COMPLEX); } // C99
230__complex { KEYWORD_RETURN(COMPLEX); } // GCC
231__complex__ { KEYWORD_RETURN(COMPLEX); } // GCC
[3848e0e]232const { KEYWORD_RETURN(CONST); }
[b87a5ed]233__const { KEYWORD_RETURN(CONST); } // GCC
234__const__ { KEYWORD_RETURN(CONST); } // GCC
[3848e0e]235continue { KEYWORD_RETURN(CONTINUE); }
[e04b636]236coroutine { KEYWORD_RETURN(COROUTINE); } // CFA
[3848e0e]237default { KEYWORD_RETURN(DEFAULT); }
[02e5ab6]238disable { KEYWORD_RETURN(DISABLE); } // CFA
[b87a5ed]239do { KEYWORD_RETURN(DO); }
[3848e0e]240double { KEYWORD_RETURN(DOUBLE); }
[b87a5ed]241dtype { KEYWORD_RETURN(DTYPE); } // CFA
[3848e0e]242else { KEYWORD_RETURN(ELSE); }
[02e5ab6]243enable { KEYWORD_RETURN(ENABLE); } // CFA
[3848e0e]244enum { KEYWORD_RETURN(ENUM); }
[b87a5ed]245__extension__ { KEYWORD_RETURN(EXTENSION); } // GCC
[c27fb59]246exception { KEYWORD_RETURN(EXCEPTION); } // CFA
[3848e0e]247extern { KEYWORD_RETURN(EXTERN); }
[bd7f401]248fallthrough { KEYWORD_RETURN(FALLTHROUGH); } // CFA
[35f730f]249fallthru { KEYWORD_RETURN(FALLTHRU); } // CFA
[b87a5ed]250finally { KEYWORD_RETURN(FINALLY); } // CFA
[3848e0e]251float { KEYWORD_RETURN(FLOAT); }
[e15853c]252__float80 { KEYWORD_RETURN(uuFLOAT80); } // GCC
253float80 { KEYWORD_RETURN(uuFLOAT80); } // GCC
254__float128 { KEYWORD_RETURN(uuFLOAT128); } // GCC
255float128 { KEYWORD_RETURN(uuFLOAT128); } // GCC
256_Float16 { FLOATXX(uFLOAT16); } // GCC
257_Float32 { FLOATXX(uFLOAT32); } // GCC
258_Float32x { FLOATXX(uFLOAT32X); } // GCC
259_Float64 { FLOATXX(uFLOAT64); } // GCC
260_Float64x { FLOATXX(uFLOAT64X); } // GCC
261_Float128 { FLOATXX(uFLOAT128); } // GCC
262_Float128x { FLOATXX(uFLOAT128); } // GCC
[b87a5ed]263for { KEYWORD_RETURN(FOR); }
264forall { KEYWORD_RETURN(FORALL); } // CFA
[3848e0e]265fortran { KEYWORD_RETURN(FORTRAN); }
[b87a5ed]266ftype { KEYWORD_RETURN(FTYPE); } // CFA
[553772b]267generator { KEYWORD_RETURN(GENERATOR); } // CFA
[b87a5ed]268_Generic { KEYWORD_RETURN(GENERIC); } // C11
[3848e0e]269goto { KEYWORD_RETURN(GOTO); }
[b87a5ed]270if { KEYWORD_RETURN(IF); }
271_Imaginary { KEYWORD_RETURN(IMAGINARY); } // C99
272__imag { KEYWORD_RETURN(IMAGINARY); } // GCC
273__imag__ { KEYWORD_RETURN(IMAGINARY); } // GCC
274inline { KEYWORD_RETURN(INLINE); } // C99
275__inline { KEYWORD_RETURN(INLINE); } // GCC
276__inline__ { KEYWORD_RETURN(INLINE); } // GCC
277int { KEYWORD_RETURN(INT); }
[201aeb9]278__int128 { KEYWORD_RETURN(INT128); } // GCC
279int128 { KEYWORD_RETURN(INT128); } // GCC
[b87a5ed]280__label__ { KEYWORD_RETURN(LABEL); } // GCC
[3848e0e]281long { KEYWORD_RETURN(LONG); }
[6016c87]282monitor { KEYWORD_RETURN(MONITOR); } // CFA
[a7c90d4]283mutex { KEYWORD_RETURN(MUTEX); } // CFA
[b87a5ed]284_Noreturn { KEYWORD_RETURN(NORETURN); } // C11
[5721a6d]285__builtin_offsetof { KEYWORD_RETURN(OFFSETOF); } // GCC
[3a2128f]286one_t { NUMERIC_RETURN(ONE_T); } // CFA
[ce28c7b]287or { QKEYWORD_RETURN(WOR); } // CFA
[4040425]288otype { KEYWORD_RETURN(OTYPE); } // CFA
[3848e0e]289register { KEYWORD_RETURN(REGISTER); }
[b87a5ed]290restrict { KEYWORD_RETURN(RESTRICT); } // C99
291__restrict { KEYWORD_RETURN(RESTRICT); } // GCC
292__restrict__ { KEYWORD_RETURN(RESTRICT); } // GCC
[3848e0e]293return { KEYWORD_RETURN(RETURN); }
294short { KEYWORD_RETURN(SHORT); }
295signed { KEYWORD_RETURN(SIGNED); }
[b87a5ed]296__signed { KEYWORD_RETURN(SIGNED); } // GCC
297__signed__ { KEYWORD_RETURN(SIGNED); } // GCC
[3848e0e]298sizeof { KEYWORD_RETURN(SIZEOF); }
299static { KEYWORD_RETURN(STATIC); }
[b87a5ed]300_Static_assert { KEYWORD_RETURN(STATICASSERT); } // C11
[3848e0e]301struct { KEYWORD_RETURN(STRUCT); }
302switch { KEYWORD_RETURN(SWITCH); }
[bd4d011]303thread { KEYWORD_RETURN(THREAD); } // C11
[b87a5ed]304_Thread_local { KEYWORD_RETURN(THREADLOCAL); } // C11
305throw { KEYWORD_RETURN(THROW); } // CFA
[02e5ab6]306throwResume { KEYWORD_RETURN(THROWRESUME); } // CFA
[5b2edbc]307timeout { QKEYWORD_RETURN(TIMEOUT); } // CFA
[4040425]308trait { KEYWORD_RETURN(TRAIT); } // CFA
[b87a5ed]309try { KEYWORD_RETURN(TRY); } // CFA
[8f60f0b]310ttype { KEYWORD_RETURN(TTYPE); } // CFA
[3848e0e]311typedef { KEYWORD_RETURN(TYPEDEF); }
[b87a5ed]312typeof { KEYWORD_RETURN(TYPEOF); } // GCC
313__typeof { KEYWORD_RETURN(TYPEOF); } // GCC
314__typeof__ { KEYWORD_RETURN(TYPEOF); } // GCC
[3848e0e]315union { KEYWORD_RETURN(UNION); }
316unsigned { KEYWORD_RETURN(UNSIGNED); }
[90c3b1c]317__builtin_va_list { KEYWORD_RETURN(VALIST); } // GCC
[72457b6]318virtual { KEYWORD_RETURN(VIRTUAL); } // CFA
[3848e0e]319void { KEYWORD_RETURN(VOID); }
320volatile { KEYWORD_RETURN(VOLATILE); }
[b87a5ed]321__volatile { KEYWORD_RETURN(VOLATILE); } // GCC
322__volatile__ { KEYWORD_RETURN(VOLATILE); } // GCC
[5b2edbc]323waitfor { KEYWORD_RETURN(WAITFOR); }
324when { KEYWORD_RETURN(WHEN); }
[3848e0e]325while { KEYWORD_RETURN(WHILE); }
[8b47e50]326with { KEYWORD_RETURN(WITH); } // CFA
[3a2128f]327zero_t { NUMERIC_RETURN(ZERO_T); } // CFA
[51b73452]328
[b87a5ed]329 /* identifier */
330{identifier} { IDENTIFIER_RETURN(); }
[7e419e7]331"`"{identifier}"`" { // CFA
332 yytext[yyleng - 1] = '\0'; yytext += 1; // SKULLDUGGERY: remove backquotes (ok to shorten?)
[dc7db63]333 IDENTIFIER_RETURN();
334}
[b87a5ed]335{attr_identifier} { ATTRIBUTE_RETURN(); }
[51b73452]336
[b87a5ed]337 /* numeric constants */
[0a2168f]338{binary_constant} { NUMERIC_RETURN(INTEGERconstant); }
[59db689]339{octal_constant} { NUMERIC_RETURN(INTEGERconstant); }
[0a2168f]340{decimal_constant} { NUMERIC_RETURN(INTEGERconstant); }
[59db689]341{hex_constant} { NUMERIC_RETURN(INTEGERconstant); }
[930f69e]342{floating_decimal} { NUMERIC_RETURN(FLOATING_DECIMALconstant); } // must appear before floating_constant
343{floating_fraction} { NUMERIC_RETURN(FLOATING_FRACTIONconstant); } // must appear before floating_constant
[3848e0e]344{floating_constant} { NUMERIC_RETURN(FLOATINGconstant); }
345{hex_floating_constant} { NUMERIC_RETURN(FLOATINGconstant); }
[51b73452]346
[b87a5ed]347 /* character constant, allows empty value */
[9ed4f94]348({cwide_prefix}[_]?)?['] { BEGIN QUOTE; rm_underscore(); strtext = new string( yytext, yyleng ); }
[c1c1112]349<QUOTE>[^'\\\n]* { strtext->append( yytext, yyleng ); }
[dc7db63]350<QUOTE>['\n] { BEGIN 0; strtext->append( yytext, yyleng ); RETURN_STR(CHARACTERconstant); }
[930f69e]351 /* ' stop editor highlighting */
[51b73452]352
[b87a5ed]353 /* string constant */
[9ed4f94]354({swide_prefix}[_]?)?["] { BEGIN STRING; rm_underscore(); strtext = new string( yytext, yyleng ); }
[c1c1112]355<STRING>[^"\\\n]* { strtext->append( yytext, yyleng ); }
[dc7db63]356<STRING>["\n] { BEGIN 0; strtext->append( yytext, yyleng ); RETURN_STR(STRINGliteral); }
[930f69e]357 /* " stop editor highlighting */
[51b73452]358
[59db689]359 /* common character/string constant */
[c1c1112]360<QUOTE,STRING>{escape_seq} { rm_underscore(); strtext->append( yytext, yyleng ); }
[cd623a4]361<QUOTE,STRING>"\\"{h_white}*"\n" {} // continuation (ALSO HANDLED BY CPP)
[c1c1112]362<QUOTE,STRING>"\\" { strtext->append( yytext, yyleng ); } // unknown escape character
[3848e0e]363
[b87a5ed]364 /* punctuation */
[615a096]365"@" { ASCIIOP_RETURN(); }
[dc7db63]366"`" { ASCIIOP_RETURN(); }
[b87a5ed]367"[" { ASCIIOP_RETURN(); }
368"]" { ASCIIOP_RETURN(); }
369"(" { ASCIIOP_RETURN(); }
370")" { ASCIIOP_RETURN(); }
371"{" { ASCIIOP_RETURN(); }
372"}" { ASCIIOP_RETURN(); }
373"," { ASCIIOP_RETURN(); } // also operator
374":" { ASCIIOP_RETURN(); }
375";" { ASCIIOP_RETURN(); }
376"." { ASCIIOP_RETURN(); } // also operator
[3848e0e]377"..." { NAMEDOP_RETURN(ELLIPSIS); }
378
[b87a5ed]379 /* alternative C99 brackets, "<:" & "<:<:" handled by preprocessor */
[3848e0e]380"<:" { RETURN_VAL('['); }
381":>" { RETURN_VAL(']'); }
382"<%" { RETURN_VAL('{'); }
383"%>" { RETURN_VAL('}'); }
[51b73452]384
[b87a5ed]385 /* operators */
386"!" { ASCIIOP_RETURN(); }
387"+" { ASCIIOP_RETURN(); }
388"-" { ASCIIOP_RETURN(); }
389"*" { ASCIIOP_RETURN(); }
[e5f2a67]390"\\" { ASCIIOP_RETURN(); } // CFA, exponentiation
[b87a5ed]391"/" { ASCIIOP_RETURN(); }
392"%" { ASCIIOP_RETURN(); }
393"^" { ASCIIOP_RETURN(); }
394"~" { ASCIIOP_RETURN(); }
395"&" { ASCIIOP_RETURN(); }
396"|" { ASCIIOP_RETURN(); }
397"<" { ASCIIOP_RETURN(); }
398">" { ASCIIOP_RETURN(); }
399"=" { ASCIIOP_RETURN(); }
400"?" { ASCIIOP_RETURN(); }
[3848e0e]401
402"++" { NAMEDOP_RETURN(ICR); }
403"--" { NAMEDOP_RETURN(DECR); }
404"==" { NAMEDOP_RETURN(EQ); }
405"!=" { NAMEDOP_RETURN(NE); }
406"<<" { NAMEDOP_RETURN(LS); }
407">>" { NAMEDOP_RETURN(RS); }
408"<=" { NAMEDOP_RETURN(LE); }
409">=" { NAMEDOP_RETURN(GE); }
410"&&" { NAMEDOP_RETURN(ANDAND); }
411"||" { NAMEDOP_RETURN(OROR); }
412"->" { NAMEDOP_RETURN(ARROW); }
413"+=" { NAMEDOP_RETURN(PLUSassign); }
414"-=" { NAMEDOP_RETURN(MINUSassign); }
[e5f2a67]415"\\=" { NAMEDOP_RETURN(EXPassign); } // CFA, exponentiation
[3848e0e]416"*=" { NAMEDOP_RETURN(MULTassign); }
417"/=" { NAMEDOP_RETURN(DIVassign); }
418"%=" { NAMEDOP_RETURN(MODassign); }
419"&=" { NAMEDOP_RETURN(ANDassign); }
420"|=" { NAMEDOP_RETURN(ORassign); }
421"^=" { NAMEDOP_RETURN(ERassign); }
422"<<=" { NAMEDOP_RETURN(LSassign); }
423">>=" { NAMEDOP_RETURN(RSassign); }
[51b73452]424
[08061589]425"@=" { NAMEDOP_RETURN(ATassign); } // CFA
[d69f4bb4]426"~=" { NAMEDOP_RETURN(ErangeUpEq); } // CFA
427"-~" { NAMEDOP_RETURN(ErangeDown); } // CFA
428"-~=" { NAMEDOP_RETURN(ErangeDownEq); } // CFA
[097e2b0]429
[b87a5ed]430 /* CFA, operator identifier */
431{op_unary}"?" { IDENTIFIER_RETURN(); } // unary
[a61fea9a]432"?"({op_unary_pre_post}|"()"|"[?]"|"{}") { IDENTIFIER_RETURN(); }
[76c62b2]433"^?{}" { IDENTIFIER_RETURN(); }
[7e419e7]434"?`"{identifier} { IDENTIFIER_RETURN(); } // postfix operator
[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
480void 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: //
Note: See TracBrowser for help on using the repository browser.