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lex.ll @ 6411b7d

ADTast-experimental

Last change on this file since 6411b7d was 59c7e3e, checked in by Peter A. Buhr <pabuhr@…>, 20 months ago
parge va_arg as special case function
Property mode set to `100644`
File size: 20.1 KB

Rev	Line
[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	*
[51b7345]	9	* Author : Peter A. Buhr
	10	* Created On : Sat Sep 22 08:58:10 2001
[926af74]	11	* Last Modified By : Peter A. Buhr
[59c7e3e]	12	* Last Modified On : Thu Oct 13 20:46:04 2022
	13	* Update Count : 764
[51b7345]	14	*/
	15
	16	%option yylineno
[4e9c7c1]	17	%option noyywrap
[5f2f2d7]	18	%option nounput
[51b7345]	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.
[51b7345]	24
[8c17ab0]	25	//************************** Includes and Defines **************************
[51b7345]	26
[0bd46fd]	27	#ifdef __clang__
	28	#pragma GCC diagnostic ignored "-Wnull-conversion"
	29	#endif
	30
[4439008]	31	// trigger before each matching rule's action
	32	#define YY_USER_ACTION \
	33	yylloc.first_line = yylineno; \
	34	yylloc.first_column = column; \
	35	column += yyleng; \
	36	yylloc.last_column = column; \
	37	yylloc.last_line = yylineno; \
	38	yylloc.filename = yyfilename ? yyfilename : "";
[9ed4f94]	39	unsigned int column = 0; // position of the end of the last token parsed
	40
[51b7345]	41	#include <string>
[f487962]	42	#include <cstdio> // FILENAME_MAX
[9ed4f94]	43	using namespace std;
[51b7345]	44
[ba01b14]	45	#include "config.h" // configure info
[984dce6]	46	#include "ParseNode.h"
	47	#include "TypedefTable.h"
[51b7345]	48
[60a8062]	49	string * build_postfix_name( string * name );
	50
[51b7345]	51	char *yyfilename;
[9ed4f94]	52	string *strtext; // accumulate parts of character and string constant value
[51b7345]	53
[de62360d]	54	#define RETURN_LOCN(x) yylval.tok.loc.file = yyfilename; yylval.tok.loc.line = yylineno; return( x )
[9ed4f94]	55	#define RETURN_VAL(x) yylval.tok.str = new string( yytext ); RETURN_LOCN( x )
[926af74]	56	#define RETURN_CHAR(x) yylval.tok.str = nullptr; RETURN_LOCN( x )
[de62360d]	57	#define RETURN_STR(x) yylval.tok.str = strtext; RETURN_LOCN( x )
[5f2f2d7]	58
[f487962]	59	#define WHITE_RETURN(x) // do nothing
[9ed4f94]	60	#define NEWLINE_RETURN() column = 0; WHITE_RETURN( '\n' )
[de62360d]	61	#define ASCIIOP_RETURN() RETURN_CHAR( (int)yytext[0] ) // single character operator
[f487962]	62	#define NAMEDOP_RETURN(x) RETURN_CHAR( x ) // multichar operator, with a name
[de62360d]	63	#define NUMERIC_RETURN(x) rm_underscore(); RETURN_VAL( x ) // numeric constant
	64	#define KEYWORD_RETURN(x) RETURN_CHAR( x ) // keyword
[4439008]	65	#define QKEYWORD_RETURN(x) RETURN_VAL(x); // quasi-keyword
[984dce6]	66	#define IDENTIFIER_RETURN() RETURN_VAL( typedefTable.isKind( yytext ) )
[51b7345]	67
[25744d2]	68	#ifdef HAVE_KEYWORDS_FLOATXX // GCC >= 7 => keyword, otherwise typedef
[ba01b14]	69	#define FLOATXX(v) KEYWORD_RETURN(v);
	70	#else
[37cdd97]	71	#define FLOATXX(v) IDENTIFIER_RETURN();
[ba01b14]	72	#endif // HAVE_KEYWORDS_FLOATXX
	73
[3848e0e]	74	void rm_underscore() {
[7e419e7]	75	// SKULLDUGGERY: remove underscores (ok to shorten?)
[e7aed49]	76	yyleng = 0;
[7e419e7]	77	for ( int i = 0; yytext[i] != '\0'; i += 1 ) { // copying non-underscore characters to front of string
[b87a5ed]	78	if ( yytext[i] != '_' ) {
[e7aed49]	79	yytext[yyleng] = yytext[i];
	80	yyleng += 1;
[b87a5ed]	81	} // if
	82	} // for
	83	yytext[yyleng] = '\0';
[7e419e7]	84	} // rm_underscore
[51b7345]	85
[7812f1d1]	86	// Stop warning due to incorrectly generated flex code.
	87	#pragma GCC diagnostic ignored "-Wsign-compare"
[51b7345]	88	%}
	89
[0a2168f]	90	binary [0-1]
[51b7345]	91	octal [0-7]
	92	nonzero [1-9]
	93	decimal [0-9]
	94	hex [0-9a-fA-F]
[3848e0e]	95	universal_char "\\"((u"_"?{hex_quad})\|(U"_"?{hex_quad}{2}))
[51b7345]	96
[b87a5ed]	97	// identifier, GCC: $ in identifier
[51b7345]	98	identifier ([a-zA-Z_$]\|{universal_char})([0-9a-zA-Z_$]\|{universal_char})*
	99
[b87a5ed]	100	// numeric constants, CFA: '_' in constant
[3848e0e]	101	hex_quad {hex}("_"?{hex}){3}
[201aeb9]	102	size_opt (8\|16\|32\|64\|128)?
[0a616e0]	103	// CFA: explicit l8/l16/l32/l64/l128, char 'hh', short 'h', int 'n'
[f56c32e]	104	length ("ll"\|"LL"\|[lL]{size_opt})\|("hh"\|"HH"\|[hHnN])
[0a616e0]	105	// CFA: size_t 'z', pointer 'p', which define a sign and length
	106	integer_suffix_opt ("_"?(([uU]({length}?[iI]?)\|([iI]{length}))\|([iI]({length}?[uU]?)\|([uU]{length}))\|({length}([iI]?[uU]?)\|([uU][iI]))\|[zZ]\|[pP]))?
[51b7345]	107
	108	octal_digits ({octal})\|({octal}({octal}\|"_")*{octal})
	109	octal_prefix "0""_"?
[930f69e]	110	octal_constant (("0")\|({octal_prefix}{octal_digits})){integer_suffix_opt}
[51b7345]	111
	112	nonzero_digits ({nonzero})\|({nonzero}({decimal}\|"_")*{decimal})
[930f69e]	113	decimal_constant {nonzero_digits}{integer_suffix_opt}
[51b7345]	114
[0a2168f]	115	binary_digits ({binary})\|({binary}({binary}\|"_")*{binary})
	116	binary_prefix "0"[bB]"_"?
	117	binary_constant {binary_prefix}{binary_digits}{integer_suffix_opt}
	118
[51b7345]	119	hex_digits ({hex})\|({hex}({hex}\|"_")*{hex})
	120	hex_prefix "0"[xX]"_"?
[930f69e]	121	hex_constant {hex_prefix}{hex_digits}{integer_suffix_opt}
[51b7345]	122
[d3b5a14]	123	// GCC: floating D (double), imaginary iI, and decimal floating DF, DD, DL
[51b7345]	124	exponent "_"?[eE]"_"?[+-]?{decimal_digits}
[ba01b14]	125	floating_size 16\|32\|32x\|64\|64x\|80\|128\|128x
	126	floating_length ([fFdDlLwWqQ]\|[fF]{floating_size})
[201aeb9]	127	floating_suffix ({floating_length}?[iI]?)\|([iI]{floating_length})
[d3b5a14]	128	decimal_floating_suffix [dD][fFdDlL]
	129	floating_suffix_opt ("_"?({floating_suffix}\|{decimal_floating_suffix}))?
[f4b77f2]	130	decimal_digits ({decimal})\|({decimal}({decimal}\|"_")*{decimal})
[930f69e]	131	floating_decimal {decimal_digits}"."{exponent}?{floating_suffix_opt}
	132	floating_fraction "."{decimal_digits}{exponent}?{floating_suffix_opt}
	133	floating_constant ({decimal_digits}{exponent}{floating_suffix_opt})\|({decimal_digits}{floating_fraction})
[51b7345]	134
	135	binary_exponent "_"?[pP]"_"?[+-]?{decimal_digits}
[dc7db63]	136	hex_floating_suffix_opt ("_"?({floating_suffix}))?
[930f69e]	137	hex_floating_fraction ({hex_digits}?"."{hex_digits})\|({hex_digits}".")
[f4b77f2]	138	hex_floating_constant {hex_prefix}(({hex_floating_fraction}{binary_exponent})\|({hex_digits}{binary_exponent})){hex_floating_suffix_opt}
[51b7345]	139
[b87a5ed]	140	// character escape sequence, GCC: \e => esc character
[51b7345]	141	simple_escape "\\"[abefnrtv'"?\\]
[930f69e]	142	// ' stop editor highlighting
[3848e0e]	143	octal_escape "\\"{octal}("_"?{octal}){0,2}
	144	hex_escape "\\""x""_"?{hex_digits}
[51b7345]	145	escape_seq {simple_escape}\|{octal_escape}\|{hex_escape}\|{universal_char}
[59db689]	146	cwide_prefix "L"\|"U"\|"u"
	147	swide_prefix {cwide_prefix}\|"u8"
[51b7345]	148
[b87a5ed]	149	// display/white-space characters
[51b7345]	150	h_tab [\011]
	151	form_feed [\014]
	152	v_tab [\013]
	153	c_return [\015]
	154	h_white [ ]\|{h_tab}
	155
[e7aed49]	156	// overloadable operators
[51b7345]	157	op_unary_only "~"\|"!"
	158	op_unary_binary "+"\|"-"\|"*"
	159	op_unary_pre_post "++"\|"--"
	160	op_unary {op_unary_only}\|{op_unary_binary}\|{op_unary_pre_post}
	161
[994d080]	162	op_binary_only "/"\|"%"\|"\\"\|"^"\|"&"\|"\|"\|"<"\|">"\|"="\|"=="\|"!="\|"<<"\|">>"\|"<="\|">="\|"+="\|"-="\|"*="\|"/="\|"%="\|"\\="\|"&="\|"\|="\|"^="\|"<<="\|">>="
[51b7345]	163	op_binary_over {op_unary_binary}\|{op_binary_only}
[e7aed49]	164	// op_binary_not_over "?"\|"->"\|"."\|"&&"\|"\|\|"\|"@="
	165	// operator {op_unary_pre_post}\|{op_binary_over}\|{op_binary_not_over}
[51b7345]	166
	167	%x COMMENT
[3848e0e]	168	%x BKQUOTE
	169	%x QUOTE
	170	%x STRING
[51b7345]	171
	172	%%
[994d080]	173	/* line directives */
[4040425]	174	^{h_white}"#"{h_white}[0-9]+{h_white}["][^"\n]+["]."\n" {
[930f69e]	175	/* " stop editor highlighting */
[c1c1112]	176	static char filename[FILENAME_MAX]; // temporarily store current source-file name
[51b7345]	177	char *end_num;
	178	char begin_string, end_string;
	179	long lineno, length;
	180	lineno = strtol( yytext + 1, &end_num, 0 );
	181	begin_string = strchr( end_num, '"' );
[f487962]	182	if ( begin_string ) { // file name ?
	183	end_string = strchr( begin_string + 1, '"' ); // look for ending delimiter
	184	assert( end_string ); // closing quote ?
	185	length = end_string - begin_string - 1; // file-name length without quotes or sentinel
	186	assert( length < FILENAME_MAX ); // room for sentinel ?
	187	memcpy( &filename, begin_string + 1, length ); // copy file name from yytext
	188	filename[ length ] = '\0'; // terminate string with sentinel
[9ed4f94]	189	//cout << "file " << filename << " line " << lineno << endl;
[f487962]	190	yylineno = lineno;
[c1c1112]	191	yyfilename = filename;
[b87a5ed]	192	} // if
[51b7345]	193	}
	194
[637dd9c]	195	/* preprocessor-style directives */
[61fc4f6]	196	^{h_white}"#"[^\n]"\n" { RETURN_VAL( DIRECTIVE ); }
[51b7345]	197
[cd623a4]	198	/* ignore C style comments (ALSO HANDLED BY CPP) */
[3848e0e]	199	"/*" { BEGIN COMMENT; }
[cd623a4]	200	<COMMENT>.\|\n ;
	201	<COMMENT>"*/" { BEGIN 0; }
[51b7345]	202
[cd623a4]	203	/* ignore C++ style comments (ALSO HANDLED BY CPP) */
	204	"//"[^\n]*"\n" ;
[51b7345]	205
[b87a5ed]	206	/* ignore whitespace */
[3848e0e]	207	{h_white}+ { WHITE_RETURN(' '); }
	208	({v_tab}\|{c_return}\|{form_feed})+ { WHITE_RETURN(' '); }
	209	({h_white}\|{v_tab}\|{c_return}\|{form_feed})*"\n" { NEWLINE_RETURN(); }
[51b7345]	210
[b87a5ed]	211	/* keywords */
	212	_Alignas { KEYWORD_RETURN(ALIGNAS); } // C11
	213	_Alignof { KEYWORD_RETURN(ALIGNOF); } // C11
	214	__alignof { KEYWORD_RETURN(ALIGNOF); } // GCC
	215	__alignof__ { KEYWORD_RETURN(ALIGNOF); } // GCC
	216	asm { KEYWORD_RETURN(ASM); }
	217	__asm { KEYWORD_RETURN(ASM); } // GCC
	218	__asm__ { KEYWORD_RETURN(ASM); } // GCC
	219	_Atomic { KEYWORD_RETURN(ATOMIC); } // C11
	220	__attribute { KEYWORD_RETURN(ATTRIBUTE); } // GCC
	221	__attribute__ { KEYWORD_RETURN(ATTRIBUTE); } // GCC
[3848e0e]	222	auto { KEYWORD_RETURN(AUTO); }
[f673c13c]	223	__auto_type { KEYWORD_RETURN(AUTO_TYPE); }
[b6ad601]	224	basetypeof { KEYWORD_RETURN(BASETYPEOF); } // CFA
[b87a5ed]	225	_Bool { KEYWORD_RETURN(BOOL); } // C99
[3848e0e]	226	break { KEYWORD_RETURN(BREAK); }
	227	case { KEYWORD_RETURN(CASE); }
[9fb1367]	228	catch { QKEYWORD_RETURN(CATCH); } // CFA
	229	catchResume { QKEYWORD_RETURN(CATCHRESUME); } // CFA
[3848e0e]	230	char { KEYWORD_RETURN(CHAR); }
[b87a5ed]	231	choose { KEYWORD_RETURN(CHOOSE); } // CFA
[1528a2c]	232	coerce { KEYWORD_RETURN(COERCE); } // CFA
[b87a5ed]	233	_Complex { KEYWORD_RETURN(COMPLEX); } // C99
	234	__complex { KEYWORD_RETURN(COMPLEX); } // GCC
	235	__complex__ { KEYWORD_RETURN(COMPLEX); } // GCC
[3848e0e]	236	const { KEYWORD_RETURN(CONST); }
[b87a5ed]	237	__const { KEYWORD_RETURN(CONST); } // GCC
	238	__const__ { KEYWORD_RETURN(CONST); } // GCC
[3848e0e]	239	continue { KEYWORD_RETURN(CONTINUE); }
[e04b636]	240	coroutine { KEYWORD_RETURN(COROUTINE); } // CFA
[15f769c]	241	_Decimal32 { KEYWORD_RETURN(DECIMAL32); } // GCC
	242	_Decimal64 { KEYWORD_RETURN(DECIMAL64); } // GCC
	243	_Decimal128 { KEYWORD_RETURN(DECIMAL128); } // GCC
[3848e0e]	244	default { KEYWORD_RETURN(DEFAULT); }
[02e5ab6]	245	disable { KEYWORD_RETURN(DISABLE); } // CFA
[b87a5ed]	246	do { KEYWORD_RETURN(DO); }
[3848e0e]	247	double { KEYWORD_RETURN(DOUBLE); }
[b87a5ed]	248	dtype { KEYWORD_RETURN(DTYPE); } // CFA
[3848e0e]	249	else { KEYWORD_RETURN(ELSE); }
[02e5ab6]	250	enable { KEYWORD_RETURN(ENABLE); } // CFA
[3848e0e]	251	enum { KEYWORD_RETURN(ENUM); }
[b87a5ed]	252	__extension__ { KEYWORD_RETURN(EXTENSION); } // GCC
[c27fb59]	253	exception { KEYWORD_RETURN(EXCEPTION); } // CFA
[3848e0e]	254	extern { KEYWORD_RETURN(EXTERN); }
[bd7f401]	255	fallthrough { KEYWORD_RETURN(FALLTHROUGH); } // CFA
[35f730f]	256	fallthru { KEYWORD_RETURN(FALLTHRU); } // CFA
[9fb1367]	257	finally { QKEYWORD_RETURN(FINALLY); } // CFA
	258	fixup { QKEYWORD_RETURN(FIXUP); } // CFA
[3848e0e]	259	float { KEYWORD_RETURN(FLOAT); }
[e15853c]	260	__float80 { KEYWORD_RETURN(uuFLOAT80); } // GCC
	261	float80 { KEYWORD_RETURN(uuFLOAT80); } // GCC
	262	__float128 { KEYWORD_RETURN(uuFLOAT128); } // GCC
	263	float128 { KEYWORD_RETURN(uuFLOAT128); } // GCC
	264	_Float16 { FLOATXX(uFLOAT16); } // GCC
	265	_Float32 { FLOATXX(uFLOAT32); } // GCC
	266	_Float32x { FLOATXX(uFLOAT32X); } // GCC
	267	_Float64 { FLOATXX(uFLOAT64); } // GCC
	268	_Float64x { FLOATXX(uFLOAT64X); } // GCC
	269	_Float128 { FLOATXX(uFLOAT128); } // GCC
	270	_Float128x { FLOATXX(uFLOAT128); } // GCC
[b87a5ed]	271	for { KEYWORD_RETURN(FOR); }
	272	forall { KEYWORD_RETURN(FORALL); } // CFA
[3848e0e]	273	fortran { KEYWORD_RETURN(FORTRAN); }
[b87a5ed]	274	ftype { KEYWORD_RETURN(FTYPE); } // CFA
[553772b]	275	generator { KEYWORD_RETURN(GENERATOR); } // CFA
[b87a5ed]	276	_Generic { KEYWORD_RETURN(GENERIC); } // C11
[3848e0e]	277	goto { KEYWORD_RETURN(GOTO); }
[b87a5ed]	278	if { KEYWORD_RETURN(IF); }
	279	_Imaginary { KEYWORD_RETURN(IMAGINARY); } // C99
	280	__imag { KEYWORD_RETURN(IMAGINARY); } // GCC
	281	__imag__ { KEYWORD_RETURN(IMAGINARY); } // GCC
	282	inline { KEYWORD_RETURN(INLINE); } // C99
	283	__inline { KEYWORD_RETURN(INLINE); } // GCC
	284	__inline__ { KEYWORD_RETURN(INLINE); } // GCC
	285	int { KEYWORD_RETURN(INT); }
[f1da02c]	286	int128 { KEYWORD_RETURN(INT128); } // CFA
[201aeb9]	287	__int128 { KEYWORD_RETURN(INT128); } // GCC
[f1da02c]	288	__int128_t { KEYWORD_RETURN(INT128); } // GCC
[b87a5ed]	289	__label__ { KEYWORD_RETURN(LABEL); } // GCC
[3848e0e]	290	long { KEYWORD_RETURN(LONG); }
[6016c87]	291	monitor { KEYWORD_RETURN(MONITOR); } // CFA
[a7c90d4]	292	mutex { KEYWORD_RETURN(MUTEX); } // CFA
[b87a5ed]	293	_Noreturn { KEYWORD_RETURN(NORETURN); } // C11
[5721a6d]	294	__builtin_offsetof { KEYWORD_RETURN(OFFSETOF); } // GCC
[3a2128f]	295	one_t { NUMERIC_RETURN(ONE_T); } // CFA
[ce28c7b]	296	or { QKEYWORD_RETURN(WOR); } // CFA
[4040425]	297	otype { KEYWORD_RETURN(OTYPE); } // CFA
[9fb1367]	298	recover { QKEYWORD_RETURN(RECOVER); } // CFA
[3848e0e]	299	register { KEYWORD_RETURN(REGISTER); }
[9fb1367]	300	report { KEYWORD_RETURN(THROWRESUME); } // CFA
[b87a5ed]	301	restrict { KEYWORD_RETURN(RESTRICT); } // C99
	302	__restrict { KEYWORD_RETURN(RESTRICT); } // GCC
	303	__restrict__ { KEYWORD_RETURN(RESTRICT); } // GCC
[3848e0e]	304	return { KEYWORD_RETURN(RETURN); }
[25744d2]	305	/* resume { KEYWORD_RETURN(RESUME); } // CFA */
[3848e0e]	306	short { KEYWORD_RETURN(SHORT); }
	307	signed { KEYWORD_RETURN(SIGNED); }
[b87a5ed]	308	__signed { KEYWORD_RETURN(SIGNED); } // GCC
	309	__signed__ { KEYWORD_RETURN(SIGNED); } // GCC
[3848e0e]	310	sizeof { KEYWORD_RETURN(SIZEOF); }
	311	static { KEYWORD_RETURN(STATIC); }
[b87a5ed]	312	_Static_assert { KEYWORD_RETURN(STATICASSERT); } // C11
[3848e0e]	313	struct { KEYWORD_RETURN(STRUCT); }
[37cdd97]	314	suspend { KEYWORD_RETURN(SUSPEND); } // CFA
[3848e0e]	315	switch { KEYWORD_RETURN(SWITCH); }
[bd4d011]	316	thread { KEYWORD_RETURN(THREAD); } // C11
[ed9a1ae]	317	__thread { KEYWORD_RETURN(THREADLOCALGCC); } // GCC
	318	_Thread_local { KEYWORD_RETURN(THREADLOCALC11); } // C11
[b87a5ed]	319	throw { KEYWORD_RETURN(THROW); } // CFA
[02e5ab6]	320	throwResume { KEYWORD_RETURN(THROWRESUME); } // CFA
[5b2edbc]	321	timeout { QKEYWORD_RETURN(TIMEOUT); } // CFA
[4040425]	322	trait { KEYWORD_RETURN(TRAIT); } // CFA
[b87a5ed]	323	try { KEYWORD_RETURN(TRY); } // CFA
[8f60f0b]	324	ttype { KEYWORD_RETURN(TTYPE); } // CFA
[3848e0e]	325	typedef { KEYWORD_RETURN(TYPEDEF); }
[b87a5ed]	326	typeof { KEYWORD_RETURN(TYPEOF); } // GCC
	327	__typeof { KEYWORD_RETURN(TYPEOF); } // GCC
	328	__typeof__ { KEYWORD_RETURN(TYPEOF); } // GCC
[1f652a7]	329	typeid { KEYWORD_RETURN(TYPEID); } // GCC
[3848e0e]	330	union { KEYWORD_RETURN(UNION); }
[f1da02c]	331	__uint128_t { KEYWORD_RETURN(UINT128); } // GCC
[3848e0e]	332	unsigned { KEYWORD_RETURN(UNSIGNED); }
[59c7e3e]	333	__builtin_va_arg { KEYWORD_RETURN(VA_ARG); } // GCC
	334	__builtin_va_list { KEYWORD_RETURN(VA_LIST); } // GCC
[72457b6]	335	virtual { KEYWORD_RETURN(VIRTUAL); } // CFA
[3848e0e]	336	void { KEYWORD_RETURN(VOID); }
	337	volatile { KEYWORD_RETURN(VOLATILE); }
[b87a5ed]	338	__volatile { KEYWORD_RETURN(VOLATILE); } // GCC
	339	__volatile__ { KEYWORD_RETURN(VOLATILE); } // GCC
[1f652a7]	340	vtable { KEYWORD_RETURN(VTABLE); } // CFA
[9fb1367]	341	waitfor { KEYWORD_RETURN(WAITFOR); } // CFA
	342	when { KEYWORD_RETURN(WHEN); } // CFA
[3848e0e]	343	while { KEYWORD_RETURN(WHILE); }
[8b47e50]	344	with { KEYWORD_RETURN(WITH); } // CFA
[3a2128f]	345	zero_t { NUMERIC_RETURN(ZERO_T); } // CFA
[51b7345]	346
[b87a5ed]	347	/* identifier */
	348	{identifier} { IDENTIFIER_RETURN(); }
[095ac99]	349	"``"{identifier} { // CFA
	350	yytext[yyleng] = '\0'; yytext += 2; // SKULLDUGGERY: remove backquotes (ok to shorten?)
[dc7db63]	351	IDENTIFIER_RETURN();
	352	}
[51b7345]	353
[b87a5ed]	354	/* numeric constants */
[0a2168f]	355	{binary_constant} { NUMERIC_RETURN(INTEGERconstant); }
[59db689]	356	{octal_constant} { NUMERIC_RETURN(INTEGERconstant); }
[0a2168f]	357	{decimal_constant} { NUMERIC_RETURN(INTEGERconstant); }
[59db689]	358	{hex_constant} { NUMERIC_RETURN(INTEGERconstant); }
[930f69e]	359	{floating_decimal} { NUMERIC_RETURN(FLOATING_DECIMALconstant); } // must appear before floating_constant
	360	{floating_fraction} { NUMERIC_RETURN(FLOATING_FRACTIONconstant); } // must appear before floating_constant
[3848e0e]	361	{floating_constant} { NUMERIC_RETURN(FLOATINGconstant); }
	362	{hex_floating_constant} { NUMERIC_RETURN(FLOATINGconstant); }
[51b7345]	363
[b87a5ed]	364	/* character constant, allows empty value */
[9ed4f94]	365	({cwide_prefix}[_]?)?['] { BEGIN QUOTE; rm_underscore(); strtext = new string( yytext, yyleng ); }
[c1c1112]	366	<QUOTE>[^'\\\n]* { strtext->append( yytext, yyleng ); }
[dc7db63]	367	<QUOTE>['\n] { BEGIN 0; strtext->append( yytext, yyleng ); RETURN_STR(CHARACTERconstant); }
[930f69e]	368	/* ' stop editor highlighting */
[51b7345]	369
[b87a5ed]	370	/* string constant */
[9ed4f94]	371	({swide_prefix}[_]?)?["] { BEGIN STRING; rm_underscore(); strtext = new string( yytext, yyleng ); }
[c1c1112]	372	<STRING>[^"\\\n]* { strtext->append( yytext, yyleng ); }
[dc7db63]	373	<STRING>["\n] { BEGIN 0; strtext->append( yytext, yyleng ); RETURN_STR(STRINGliteral); }
[930f69e]	374	/* " stop editor highlighting */
[51b7345]	375
[59db689]	376	/* common character/string constant */
[c1c1112]	377	<QUOTE,STRING>{escape_seq} { rm_underscore(); strtext->append( yytext, yyleng ); }
[cd623a4]	378	<QUOTE,STRING>"\\"{h_white}*"\n" {} // continuation (ALSO HANDLED BY CPP)
[c1c1112]	379	<QUOTE,STRING>"\\" { strtext->append( yytext, yyleng ); } // unknown escape character
[3848e0e]	380
[b87a5ed]	381	/* punctuation */
[615a096]	382	"@" { ASCIIOP_RETURN(); }
[dc7db63]	383	"`" { ASCIIOP_RETURN(); }
[b87a5ed]	384	"[" { ASCIIOP_RETURN(); }
	385	"]" { ASCIIOP_RETURN(); }
	386	"(" { ASCIIOP_RETURN(); }
	387	")" { ASCIIOP_RETURN(); }
	388	"{" { ASCIIOP_RETURN(); }
	389	"}" { ASCIIOP_RETURN(); }
	390	"," { ASCIIOP_RETURN(); } // also operator
	391	":" { ASCIIOP_RETURN(); }
	392	";" { ASCIIOP_RETURN(); }
	393	"." { ASCIIOP_RETURN(); } // also operator
[3848e0e]	394	"..." { NAMEDOP_RETURN(ELLIPSIS); }
	395
[b87a5ed]	396	/* alternative C99 brackets, "<:" & "<:<:" handled by preprocessor */
[3848e0e]	397	"<:" { RETURN_VAL('['); }
	398	":>" { RETURN_VAL(']'); }
	399	"<%" { RETURN_VAL('{'); }
	400	"%>" { RETURN_VAL('}'); }
[51b7345]	401
[b87a5ed]	402	/* operators */
	403	"!" { ASCIIOP_RETURN(); }
	404	"+" { ASCIIOP_RETURN(); }
	405	"-" { ASCIIOP_RETURN(); }
	406	"*" { ASCIIOP_RETURN(); }
[e5f2a67]	407	"\\" { ASCIIOP_RETURN(); } // CFA, exponentiation
[b87a5ed]	408	"/" { ASCIIOP_RETURN(); }
	409	"%" { ASCIIOP_RETURN(); }
	410	"^" { ASCIIOP_RETURN(); }
	411	"~" { ASCIIOP_RETURN(); }
	412	"&" { ASCIIOP_RETURN(); }
	413	"\|" { ASCIIOP_RETURN(); }
	414	"<" { ASCIIOP_RETURN(); }
	415	">" { ASCIIOP_RETURN(); }
	416	"=" { ASCIIOP_RETURN(); }
	417	"?" { ASCIIOP_RETURN(); }
[3848e0e]	418
	419	"++" { NAMEDOP_RETURN(ICR); }
	420	"--" { NAMEDOP_RETURN(DECR); }
	421	"==" { NAMEDOP_RETURN(EQ); }
	422	"!=" { NAMEDOP_RETURN(NE); }
	423	"<<" { NAMEDOP_RETURN(LS); }
	424	">>" { NAMEDOP_RETURN(RS); }
	425	"<=" { NAMEDOP_RETURN(LE); }
	426	">=" { NAMEDOP_RETURN(GE); }
	427	"&&" { NAMEDOP_RETURN(ANDAND); }
	428	"\|\|" { NAMEDOP_RETURN(OROR); }
	429	"->" { NAMEDOP_RETURN(ARROW); }
	430	"+=" { NAMEDOP_RETURN(PLUSassign); }
	431	"-=" { NAMEDOP_RETURN(MINUSassign); }
[e5f2a67]	432	"\\=" { NAMEDOP_RETURN(EXPassign); } // CFA, exponentiation
[3848e0e]	433	"*=" { NAMEDOP_RETURN(MULTassign); }
	434	"/=" { NAMEDOP_RETURN(DIVassign); }
	435	"%=" { NAMEDOP_RETURN(MODassign); }
	436	"&=" { NAMEDOP_RETURN(ANDassign); }
	437	"\|=" { NAMEDOP_RETURN(ORassign); }
	438	"^=" { NAMEDOP_RETURN(ERassign); }
	439	"<<=" { NAMEDOP_RETURN(LSassign); }
	440	">>=" { NAMEDOP_RETURN(RSassign); }
[51b7345]	441
[08061589]	442	"@=" { NAMEDOP_RETURN(ATassign); } // CFA
[d69f4bb4]	443	"~=" { NAMEDOP_RETURN(ErangeUpEq); } // CFA
	444	"-~" { NAMEDOP_RETURN(ErangeDown); } // CFA
	445	"-~=" { NAMEDOP_RETURN(ErangeDownEq); } // CFA
[097e2b0]	446
[b87a5ed]	447	/* CFA, operator identifier */
	448	{op_unary}"?" { IDENTIFIER_RETURN(); } // unary
[a61fea9a]	449	"?"({op_unary_pre_post}\|"()"\|"[?]"\|"{}") { IDENTIFIER_RETURN(); }
[76c62b2]	450	"^?{}" { IDENTIFIER_RETURN(); }
[60a8062]	451	"?`"{identifier} { // postfix operator
	452	yylval.tok.str = new string( &yytext[2] ); // remove ?`
	453	yylval.tok.str = build_postfix_name( yylval.tok.str ); // add prefix
	454	RETURN_LOCN( typedefTable.isKind( *yylval.tok.str ) );
	455	}
[b87a5ed]	456	"?"{op_binary_over}"?" { IDENTIFIER_RETURN(); } // binary
[51b7345]	457	/*
[daf9671]	458	This rule handles ambiguous cases with operator identifiers, e.g., "int ??()", where the string "??" can be
	459	lexed as "?"/"?" or ""/"??". Since it is common practise to put a unary operator juxtaposed to an identifier,
	460	e.g., "*i", users will be annoyed if they cannot do this with respect to operator identifiers. Therefore, there is
	461	a lexical look-ahead for the second case, with backtracking to return the leading unary operator and then
	462	reparsing the trailing operator identifier. Otherwise a space is needed between the unary operator and operator
	463	identifier to disambiguate this common case.
	464
	465	A similar issue occurs with the dereference, *?(...), and routine-call, ?()(...) identifiers. The ambiguity
	466	occurs when the deference operator has no parameters, ?() and ?()(...), requiring arbitrary whitespace
	467	look-ahead for the routine-call parameter-list to disambiguate. However, the dereference operator must have a
	468	parameter/argument to dereference ?(...). Hence, always interpreting the string ?() as * ?() does not preclude
	469	any meaningful program.
	470
	471	The remaining cases are with the increment/decrement operators and conditional expression:
	472
	473	i++? ...(...);
	474	i?++ ...(...);
	475
	476	requiring arbitrary whitespace look-ahead for the operator parameter-list, even though that interpretation is an
	477	incorrect expression (juxtaposed identifiers). Therefore, it is necessary to disambiguate these cases with a
	478	space:
	479
	480	i++ ? i : 0;
	481	i? ++i : 0;
[51b7345]	482	*/
[daf9671]	483	{op_unary}"?"({op_unary_pre_post}\|"()"\|"[?]"\|{op_binary_over}"?") {
[b87a5ed]	484	// 1 or 2 character unary operator ?
	485	int i = yytext[1] == '?' ? 1 : 2;
	486	yyless( i ); // put back characters up to first '?'
	487	if ( i > 1 ) {
	488	NAMEDOP_RETURN( yytext[0] == '+' ? ICR : DECR );
	489	} else {
	490	ASCIIOP_RETURN();
	491	} // if
	492	}
	493
[9ed4f94]	494	/* unknown character */
	495	. { yyerror( "unknown character" ); }
[51b7345]	496
	497	%%
[8551b859]	498
[9ed4f94]	499	// ----end of lexer----
	500
	501	void yyerror( const char * errmsg ) {
[8551b859]	502	SemanticErrorThrow = true;
[a8615fd1]	503	cerr << (yyfilename ? yyfilename : "unknown file") << ':' << yylineno << ':' << column - yyleng + 1
[a16764a6]	504	<< ": " << ErrorHelpers::error_str() << errmsg << " at token \"" << (yytext[0] == '\0' ? "EOF" : yytext) << '"' << endl;
[9ed4f94]	505	}
[51b7345]	506
[b87a5ed]	507	// Local Variables: //
	508	// mode: c++ //
[de62360d]	509	// tab-width: 4 //
[b87a5ed]	510	// compile-command: "make install" //
	511	// End: //

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