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lex.ll @ 3d97b78

ADTaaron-thesisarm-ehast-experimentalcleanup-dtorsdeferred_resndemanglerenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerpthread-emulationqualifiedEnumresolv-newwith_gc

Last change on this file since 3d97b78 was a16764a6, checked in by Thierry Delisle <tdelisle@…>, 7 years ago
Changed warning system to prepare for toggling warnings
Property mode set to `100644`
File size: 18.1 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
[c27fb59]	12	* Last Modified On : Thu Feb 22 18:11:27 2018
	13	* Update Count : 637
[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
[9ed4f94]	27	unsigned int column = 0; // position of the end of the last token parsed
[d48e529]	28	#define YY_USER_ACTION yylloc.first_line = yylineno; yylloc.first_column = column; column += yyleng; yylloc.last_column = column; yylloc.last_line = yylineno; yylloc.filename = yyfilename ? yyfilename : ""; // trigger before each matching rule's action
[9ed4f94]	29
[51b7345]	30	#include <string>
[f487962]	31	#include <cstdio> // FILENAME_MAX
[9ed4f94]	32	using namespace std;
[51b7345]	33
[984dce6]	34	#include "ParseNode.h"
	35	#include "TypedefTable.h"
[51b7345]	36
	37	char *yyfilename;
[9ed4f94]	38	string *strtext; // accumulate parts of character and string constant value
[51b7345]	39
[de62360d]	40	#define RETURN_LOCN(x) yylval.tok.loc.file = yyfilename; yylval.tok.loc.line = yylineno; return( x )
[9ed4f94]	41	#define RETURN_VAL(x) yylval.tok.str = new string( yytext ); RETURN_LOCN( x )
[926af74]	42	#define RETURN_CHAR(x) yylval.tok.str = nullptr; RETURN_LOCN( x )
[de62360d]	43	#define RETURN_STR(x) yylval.tok.str = strtext; RETURN_LOCN( x )
[5f2f2d7]	44
[f487962]	45	#define WHITE_RETURN(x) // do nothing
[9ed4f94]	46	#define NEWLINE_RETURN() column = 0; WHITE_RETURN( '\n' )
[de62360d]	47	#define ASCIIOP_RETURN() RETURN_CHAR( (int)yytext[0] ) // single character operator
[f487962]	48	#define NAMEDOP_RETURN(x) RETURN_CHAR( x ) // multichar operator, with a name
[de62360d]	49	#define NUMERIC_RETURN(x) rm_underscore(); RETURN_VAL( x ) // numeric constant
	50	#define KEYWORD_RETURN(x) RETURN_CHAR( x ) // keyword
[5b2edbc]	51	#define QKEYWORD_RETURN(x) typedefTable.isKind( yytext ); RETURN_VAL(x); // quasi-keyword
[984dce6]	52	#define IDENTIFIER_RETURN() RETURN_VAL( typedefTable.isKind( yytext ) )
[de62360d]	53	#define ATTRIBUTE_RETURN() RETURN_VAL( ATTR_IDENTIFIER )
[51b7345]	54
[3848e0e]	55	void rm_underscore() {
[e7aed49]	56	// Remove underscores in numeric constant by copying the non-underscore characters to the front of the string.
	57	yyleng = 0;
[b87a5ed]	58	for ( int i = 0; yytext[i] != '\0'; i += 1 ) {
[76c62b2]	59	if ( yytext[i] == '`' ) {
	60	// copy user suffix
	61	for ( ; yytext[i] != '\0'; i += 1 ) {
	62	yytext[yyleng] = yytext[i];
	63	yyleng += 1;
	64	} // for
	65	break;
	66	} // if
[b87a5ed]	67	if ( yytext[i] != '_' ) {
[e7aed49]	68	yytext[yyleng] = yytext[i];
	69	yyleng += 1;
[b87a5ed]	70	} // if
	71	} // for
	72	yytext[yyleng] = '\0';
[51b7345]	73	}
	74
[7812f1d1]	75	// Stop warning due to incorrectly generated flex code.
	76	#pragma GCC diagnostic ignored "-Wsign-compare"
[51b7345]	77	%}
	78
	79	octal [0-7]
	80	nonzero [1-9]
	81	decimal [0-9]
	82	hex [0-9a-fA-F]
[3848e0e]	83	universal_char "\\"((u"_"?{hex_quad})\|(U"_"?{hex_quad}{2}))
[51b7345]	84
[b87a5ed]	85	// identifier, GCC: $ in identifier
[51b7345]	86	identifier ([a-zA-Z_$]\|{universal_char})([0-9a-zA-Z_$]\|{universal_char})*
	87
[b87a5ed]	88	// attribute identifier, GCC: $ in identifier
[51b7345]	89	attr_identifier "@"{identifier}
	90
[76c62b2]	91	user_suffix_opt ("`"{identifier})?
	92
[b87a5ed]	93	// numeric constants, CFA: '_' in constant
[3848e0e]	94	hex_quad {hex}("_"?{hex}){3}
[201aeb9]	95	size_opt (8\|16\|32\|64\|128)?
	96	length ("ll"\|"LL"\|[lL]{size_opt})\|("hh"\|"HH"\|[hH])
[930f69e]	97	integer_suffix_opt ("_"?(([uU]({length}?[iI]?)\|([iI]{length}))\|([iI]({length}?[uU]?)\|([uU]{length}))\|({length}([iI]?[uU]?)\|([uU][iI]))\|[zZ]))?{user_suffix_opt}
[51b7345]	98
	99	octal_digits ({octal})\|({octal}({octal}\|"_")*{octal})
	100	octal_prefix "0""_"?
[930f69e]	101	octal_constant (("0")\|({octal_prefix}{octal_digits})){integer_suffix_opt}
[51b7345]	102
	103	nonzero_digits ({nonzero})\|({nonzero}({decimal}\|"_")*{decimal})
[930f69e]	104	decimal_constant {nonzero_digits}{integer_suffix_opt}
[51b7345]	105
	106	hex_digits ({hex})\|({hex}({hex}\|"_")*{hex})
	107	hex_prefix "0"[xX]"_"?
[930f69e]	108	hex_constant {hex_prefix}{hex_digits}{integer_suffix_opt}
[51b7345]	109
[76c62b2]	110	// GCC: D (double) and iI (imaginary) suffixes, and DL (long double)
[51b7345]	111	exponent "_"?[eE]"_"?[+-]?{decimal_digits}
[201aeb9]	112	floating_size 32\|64\|80\|128
	113	floating_length ([fFdDlL]\|[lL]{floating_size})
	114	floating_suffix ({floating_length}?[iI]?)\|([iI]{floating_length})
[f4b77f2]	115	floating_suffix_opt ("_"?({floating_suffix}\|"DL"))?{user_suffix_opt}
	116	decimal_digits ({decimal})\|({decimal}({decimal}\|"_")*{decimal})
[930f69e]	117	floating_decimal {decimal_digits}"."{exponent}?{floating_suffix_opt}
	118	floating_fraction "."{decimal_digits}{exponent}?{floating_suffix_opt}
	119	floating_constant ({decimal_digits}{exponent}{floating_suffix_opt})\|({decimal_digits}{floating_fraction})
[51b7345]	120
	121	binary_exponent "_"?[pP]"_"?[+-]?{decimal_digits}
[f4b77f2]	122	hex_floating_suffix_opt ("_"?({floating_suffix}))?{user_suffix_opt}
[930f69e]	123	hex_floating_fraction ({hex_digits}?"."{hex_digits})\|({hex_digits}".")
[f4b77f2]	124	hex_floating_constant {hex_prefix}(({hex_floating_fraction}{binary_exponent})\|({hex_digits}{binary_exponent})){hex_floating_suffix_opt}
[51b7345]	125
[b87a5ed]	126	// character escape sequence, GCC: \e => esc character
[51b7345]	127	simple_escape "\\"[abefnrtv'"?\\]
[930f69e]	128	// ' stop editor highlighting
[3848e0e]	129	octal_escape "\\"{octal}("_"?{octal}){0,2}
	130	hex_escape "\\""x""_"?{hex_digits}
[51b7345]	131	escape_seq {simple_escape}\|{octal_escape}\|{hex_escape}\|{universal_char}
[59db689]	132	cwide_prefix "L"\|"U"\|"u"
	133	swide_prefix {cwide_prefix}\|"u8"
[51b7345]	134
[b87a5ed]	135	// display/white-space characters
[51b7345]	136	h_tab [\011]
	137	form_feed [\014]
	138	v_tab [\013]
	139	c_return [\015]
	140	h_white [ ]\|{h_tab}
	141
[e7aed49]	142	// overloadable operators
[51b7345]	143	op_unary_only "~"\|"!"
	144	op_unary_binary "+"\|"-"\|"*"
	145	op_unary_pre_post "++"\|"--"
	146	op_unary {op_unary_only}\|{op_unary_binary}\|{op_unary_pre_post}
	147
[994d080]	148	op_binary_only "/"\|"%"\|"\\"\|"^"\|"&"\|"\|"\|"<"\|">"\|"="\|"=="\|"!="\|"<<"\|">>"\|"<="\|">="\|"+="\|"-="\|"*="\|"/="\|"%="\|"\\="\|"&="\|"\|="\|"^="\|"<<="\|">>="
[51b7345]	149	op_binary_over {op_unary_binary}\|{op_binary_only}
[e7aed49]	150	// op_binary_not_over "?"\|"->"\|"."\|"&&"\|"\|\|"\|"@="
	151	// operator {op_unary_pre_post}\|{op_binary_over}\|{op_binary_not_over}
[51b7345]	152
	153	%x COMMENT
[3848e0e]	154	%x BKQUOTE
	155	%x QUOTE
	156	%x STRING
[51b7345]	157
	158	%%
[994d080]	159	/* line directives */
[4040425]	160	^{h_white}"#"{h_white}[0-9]+{h_white}["][^"\n]+["]."\n" {
[930f69e]	161	/* " stop editor highlighting */
[c1c1112]	162	static char filename[FILENAME_MAX]; // temporarily store current source-file name
[51b7345]	163	char *end_num;
	164	char begin_string, end_string;
	165	long lineno, length;
	166	lineno = strtol( yytext + 1, &end_num, 0 );
	167	begin_string = strchr( end_num, '"' );
[f487962]	168	if ( begin_string ) { // file name ?
	169	end_string = strchr( begin_string + 1, '"' ); // look for ending delimiter
	170	assert( end_string ); // closing quote ?
	171	length = end_string - begin_string - 1; // file-name length without quotes or sentinel
	172	assert( length < FILENAME_MAX ); // room for sentinel ?
	173	memcpy( &filename, begin_string + 1, length ); // copy file name from yytext
	174	filename[ length ] = '\0'; // terminate string with sentinel
[9ed4f94]	175	//cout << "file " << filename << " line " << lineno << endl;
[f487962]	176	yylineno = lineno;
[c1c1112]	177	yyfilename = filename;
[b87a5ed]	178	} // if
[51b7345]	179	}
	180
[b87a5ed]	181	/* ignore preprocessor directives (for now) */
[51b7345]	182	^{h_white}"#"[^\n]"\n" ;
	183
[cd623a4]	184	/* ignore C style comments (ALSO HANDLED BY CPP) */
[3848e0e]	185	"/*" { BEGIN COMMENT; }
[cd623a4]	186	<COMMENT>.\|\n ;
	187	<COMMENT>"*/" { BEGIN 0; }
[51b7345]	188
[cd623a4]	189	/* ignore C++ style comments (ALSO HANDLED BY CPP) */
	190	"//"[^\n]*"\n" ;
[51b7345]	191
[b87a5ed]	192	/* ignore whitespace */
[3848e0e]	193	{h_white}+ { WHITE_RETURN(' '); }
	194	({v_tab}\|{c_return}\|{form_feed})+ { WHITE_RETURN(' '); }
	195	({h_white}\|{v_tab}\|{c_return}\|{form_feed})*"\n" { NEWLINE_RETURN(); }
[51b7345]	196
[b87a5ed]	197	/* keywords */
	198	_Alignas { KEYWORD_RETURN(ALIGNAS); } // C11
	199	_Alignof { KEYWORD_RETURN(ALIGNOF); } // C11
	200	__alignof { KEYWORD_RETURN(ALIGNOF); } // GCC
	201	__alignof__ { KEYWORD_RETURN(ALIGNOF); } // GCC
	202	asm { KEYWORD_RETURN(ASM); }
	203	__asm { KEYWORD_RETURN(ASM); } // GCC
	204	__asm__ { KEYWORD_RETURN(ASM); } // GCC
[02e5ab6]	205	_At { KEYWORD_RETURN(AT); } // CFA
[b87a5ed]	206	_Atomic { KEYWORD_RETURN(ATOMIC); } // C11
	207	__attribute { KEYWORD_RETURN(ATTRIBUTE); } // GCC
	208	__attribute__ { KEYWORD_RETURN(ATTRIBUTE); } // GCC
[3848e0e]	209	auto { KEYWORD_RETURN(AUTO); }
[b87a5ed]	210	_Bool { KEYWORD_RETURN(BOOL); } // C99
[3848e0e]	211	break { KEYWORD_RETURN(BREAK); }
	212	case { KEYWORD_RETURN(CASE); }
[b87a5ed]	213	catch { KEYWORD_RETURN(CATCH); } // CFA
[02e5ab6]	214	catchResume { KEYWORD_RETURN(CATCHRESUME); } // CFA
[3848e0e]	215	char { KEYWORD_RETURN(CHAR); }
[b87a5ed]	216	choose { KEYWORD_RETURN(CHOOSE); } // CFA
	217	_Complex { KEYWORD_RETURN(COMPLEX); } // C99
	218	__complex { KEYWORD_RETURN(COMPLEX); } // GCC
	219	__complex__ { KEYWORD_RETURN(COMPLEX); } // GCC
[3848e0e]	220	const { KEYWORD_RETURN(CONST); }
[b87a5ed]	221	__const { KEYWORD_RETURN(CONST); } // GCC
	222	__const__ { KEYWORD_RETURN(CONST); } // GCC
[3848e0e]	223	continue { KEYWORD_RETURN(CONTINUE); }
[e04b636]	224	coroutine { KEYWORD_RETURN(COROUTINE); } // CFA
[3848e0e]	225	default { KEYWORD_RETURN(DEFAULT); }
[02e5ab6]	226	disable { KEYWORD_RETURN(DISABLE); } // CFA
[b87a5ed]	227	do { KEYWORD_RETURN(DO); }
[3848e0e]	228	double { KEYWORD_RETURN(DOUBLE); }
[b87a5ed]	229	dtype { KEYWORD_RETURN(DTYPE); } // CFA
[3848e0e]	230	else { KEYWORD_RETURN(ELSE); }
[02e5ab6]	231	enable { KEYWORD_RETURN(ENABLE); } // CFA
[3848e0e]	232	enum { KEYWORD_RETURN(ENUM); }
[b87a5ed]	233	__extension__ { KEYWORD_RETURN(EXTENSION); } // GCC
[c27fb59]	234	exception { KEYWORD_RETURN(EXCEPTION); } // CFA
[3848e0e]	235	extern { KEYWORD_RETURN(EXTERN); }
[b87a5ed]	236	fallthru { KEYWORD_RETURN(FALLTHRU); } // CFA
[bd7f401]	237	fallthrough { KEYWORD_RETURN(FALLTHROUGH); } // CFA
[b87a5ed]	238	finally { KEYWORD_RETURN(FINALLY); } // CFA
[3848e0e]	239	float { KEYWORD_RETURN(FLOAT); }
[201aeb9]	240	__float80 { KEYWORD_RETURN(FLOAT80); } // GCC
	241	float80 { KEYWORD_RETURN(FLOAT80); } // GCC
	242	__float128 { KEYWORD_RETURN(FLOAT128); } // GCC
	243	float128 { KEYWORD_RETURN(FLOAT128); } // GCC
[b87a5ed]	244	for { KEYWORD_RETURN(FOR); }
	245	forall { KEYWORD_RETURN(FORALL); } // CFA
[3848e0e]	246	fortran { KEYWORD_RETURN(FORTRAN); }
[b87a5ed]	247	ftype { KEYWORD_RETURN(FTYPE); } // CFA
	248	_Generic { KEYWORD_RETURN(GENERIC); } // C11
[3848e0e]	249	goto { KEYWORD_RETURN(GOTO); }
[b87a5ed]	250	if { KEYWORD_RETURN(IF); }
	251	_Imaginary { KEYWORD_RETURN(IMAGINARY); } // C99
	252	__imag { KEYWORD_RETURN(IMAGINARY); } // GCC
	253	__imag__ { KEYWORD_RETURN(IMAGINARY); } // GCC
	254	inline { KEYWORD_RETURN(INLINE); } // C99
	255	__inline { KEYWORD_RETURN(INLINE); } // GCC
	256	__inline__ { KEYWORD_RETURN(INLINE); } // GCC
	257	int { KEYWORD_RETURN(INT); }
[201aeb9]	258	__int128 { KEYWORD_RETURN(INT128); } // GCC
	259	int128 { KEYWORD_RETURN(INT128); } // GCC
[b87a5ed]	260	__label__ { KEYWORD_RETURN(LABEL); } // GCC
[3848e0e]	261	long { KEYWORD_RETURN(LONG); }
[6016c87]	262	monitor { KEYWORD_RETURN(MONITOR); } // CFA
[a7c90d4]	263	mutex { KEYWORD_RETURN(MUTEX); } // CFA
[b87a5ed]	264	_Noreturn { KEYWORD_RETURN(NORETURN); } // C11
[5721a6d]	265	__builtin_offsetof { KEYWORD_RETURN(OFFSETOF); } // GCC
[3a2128f]	266	one_t { NUMERIC_RETURN(ONE_T); } // CFA
[4040425]	267	otype { KEYWORD_RETURN(OTYPE); } // CFA
[3848e0e]	268	register { KEYWORD_RETURN(REGISTER); }
[b87a5ed]	269	restrict { KEYWORD_RETURN(RESTRICT); } // C99
	270	__restrict { KEYWORD_RETURN(RESTRICT); } // GCC
	271	__restrict__ { KEYWORD_RETURN(RESTRICT); } // GCC
[3848e0e]	272	return { KEYWORD_RETURN(RETURN); }
	273	short { KEYWORD_RETURN(SHORT); }
	274	signed { KEYWORD_RETURN(SIGNED); }
[b87a5ed]	275	__signed { KEYWORD_RETURN(SIGNED); } // GCC
	276	__signed__ { KEYWORD_RETURN(SIGNED); } // GCC
[3848e0e]	277	sizeof { KEYWORD_RETURN(SIZEOF); }
	278	static { KEYWORD_RETURN(STATIC); }
[b87a5ed]	279	_Static_assert { KEYWORD_RETURN(STATICASSERT); } // C11
[3848e0e]	280	struct { KEYWORD_RETURN(STRUCT); }
	281	switch { KEYWORD_RETURN(SWITCH); }
[bd4d011]	282	thread { KEYWORD_RETURN(THREAD); } // C11
[b87a5ed]	283	_Thread_local { KEYWORD_RETURN(THREADLOCAL); } // C11
	284	throw { KEYWORD_RETURN(THROW); } // CFA
[02e5ab6]	285	throwResume { KEYWORD_RETURN(THROWRESUME); } // CFA
[5b2edbc]	286	timeout { QKEYWORD_RETURN(TIMEOUT); } // CFA
[4040425]	287	trait { KEYWORD_RETURN(TRAIT); } // CFA
[b87a5ed]	288	try { KEYWORD_RETURN(TRY); } // CFA
[8f60f0b]	289	ttype { KEYWORD_RETURN(TTYPE); } // CFA
[3848e0e]	290	typedef { KEYWORD_RETURN(TYPEDEF); }
[b87a5ed]	291	typeof { KEYWORD_RETURN(TYPEOF); } // GCC
	292	__typeof { KEYWORD_RETURN(TYPEOF); } // GCC
	293	__typeof__ { KEYWORD_RETURN(TYPEOF); } // GCC
[3848e0e]	294	union { KEYWORD_RETURN(UNION); }
	295	unsigned { KEYWORD_RETURN(UNSIGNED); }
[90c3b1c]	296	__builtin_va_list { KEYWORD_RETURN(VALIST); } // GCC
[72457b6]	297	virtual { KEYWORD_RETURN(VIRTUAL); } // CFA
[3848e0e]	298	void { KEYWORD_RETURN(VOID); }
	299	volatile { KEYWORD_RETURN(VOLATILE); }
[b87a5ed]	300	__volatile { KEYWORD_RETURN(VOLATILE); } // GCC
	301	__volatile__ { KEYWORD_RETURN(VOLATILE); } // GCC
[5b2edbc]	302	waitfor { KEYWORD_RETURN(WAITFOR); }
	303	or { QKEYWORD_RETURN(WOR); } // CFA
	304	when { KEYWORD_RETURN(WHEN); }
[3848e0e]	305	while { KEYWORD_RETURN(WHILE); }
[8b47e50]	306	with { KEYWORD_RETURN(WITH); } // CFA
[3a2128f]	307	zero_t { NUMERIC_RETURN(ZERO_T); } // CFA
[51b7345]	308
[b87a5ed]	309	/* identifier */
	310	{identifier} { IDENTIFIER_RETURN(); }
	311	{attr_identifier} { ATTRIBUTE_RETURN(); }
[c6b1105]	312	"`" { BEGIN BKQUOTE; }
[b87a5ed]	313	<BKQUOTE>{identifier} { IDENTIFIER_RETURN(); }
	314	<BKQUOTE>"`" { BEGIN 0; }
[51b7345]	315
[b87a5ed]	316	/* numeric constants */
[59db689]	317	{decimal_constant} { NUMERIC_RETURN(INTEGERconstant); }
	318	{octal_constant} { NUMERIC_RETURN(INTEGERconstant); }
	319	{hex_constant} { NUMERIC_RETURN(INTEGERconstant); }
[930f69e]	320	{floating_decimal} { NUMERIC_RETURN(FLOATING_DECIMALconstant); } // must appear before floating_constant
	321	{floating_fraction} { NUMERIC_RETURN(FLOATING_FRACTIONconstant); } // must appear before floating_constant
[3848e0e]	322	{floating_constant} { NUMERIC_RETURN(FLOATINGconstant); }
	323	{hex_floating_constant} { NUMERIC_RETURN(FLOATINGconstant); }
[51b7345]	324
[b87a5ed]	325	/* character constant, allows empty value */
[9ed4f94]	326	({cwide_prefix}[_]?)?['] { BEGIN QUOTE; rm_underscore(); strtext = new string( yytext, yyleng ); }
[c1c1112]	327	<QUOTE>[^'\\\n]* { strtext->append( yytext, yyleng ); }
[76c62b2]	328	<QUOTE>['\n]{user_suffix_opt} { BEGIN 0; strtext->append( yytext, yyleng ); RETURN_STR(CHARACTERconstant); }
[930f69e]	329	/* ' stop editor highlighting */
[51b7345]	330
[b87a5ed]	331	/* string constant */
[9ed4f94]	332	({swide_prefix}[_]?)?["] { BEGIN STRING; rm_underscore(); strtext = new string( yytext, yyleng ); }
[c1c1112]	333	<STRING>[^"\\\n]* { strtext->append( yytext, yyleng ); }
[76c62b2]	334	<STRING>["\n]{user_suffix_opt} { BEGIN 0; strtext->append( yytext, yyleng ); RETURN_STR(STRINGliteral); }
[930f69e]	335	/* " stop editor highlighting */
[51b7345]	336
[59db689]	337	/* common character/string constant */
[c1c1112]	338	<QUOTE,STRING>{escape_seq} { rm_underscore(); strtext->append( yytext, yyleng ); }
[cd623a4]	339	<QUOTE,STRING>"\\"{h_white}*"\n" {} // continuation (ALSO HANDLED BY CPP)
[c1c1112]	340	<QUOTE,STRING>"\\" { strtext->append( yytext, yyleng ); } // unknown escape character
[3848e0e]	341
[b87a5ed]	342	/* punctuation */
[615a096]	343	"@" { ASCIIOP_RETURN(); }
[b87a5ed]	344	"[" { ASCIIOP_RETURN(); }
	345	"]" { ASCIIOP_RETURN(); }
	346	"(" { ASCIIOP_RETURN(); }
	347	")" { ASCIIOP_RETURN(); }
	348	"{" { ASCIIOP_RETURN(); }
	349	"}" { ASCIIOP_RETURN(); }
	350	"," { ASCIIOP_RETURN(); } // also operator
	351	":" { ASCIIOP_RETURN(); }
	352	";" { ASCIIOP_RETURN(); }
	353	"." { ASCIIOP_RETURN(); } // also operator
[3848e0e]	354	"..." { NAMEDOP_RETURN(ELLIPSIS); }
	355
[b87a5ed]	356	/* alternative C99 brackets, "<:" & "<:<:" handled by preprocessor */
[3848e0e]	357	"<:" { RETURN_VAL('['); }
	358	":>" { RETURN_VAL(']'); }
	359	"<%" { RETURN_VAL('{'); }
	360	"%>" { RETURN_VAL('}'); }
[51b7345]	361
[b87a5ed]	362	/* operators */
	363	"!" { ASCIIOP_RETURN(); }
	364	"+" { ASCIIOP_RETURN(); }
	365	"-" { ASCIIOP_RETURN(); }
	366	"*" { ASCIIOP_RETURN(); }
[e5f2a67]	367	"\\" { ASCIIOP_RETURN(); } // CFA, exponentiation
[b87a5ed]	368	"/" { ASCIIOP_RETURN(); }
	369	"%" { ASCIIOP_RETURN(); }
	370	"^" { ASCIIOP_RETURN(); }
	371	"~" { ASCIIOP_RETURN(); }
	372	"&" { ASCIIOP_RETURN(); }
	373	"\|" { ASCIIOP_RETURN(); }
	374	"<" { ASCIIOP_RETURN(); }
	375	">" { ASCIIOP_RETURN(); }
	376	"=" { ASCIIOP_RETURN(); }
	377	"?" { ASCIIOP_RETURN(); }
[3848e0e]	378
	379	"++" { NAMEDOP_RETURN(ICR); }
	380	"--" { NAMEDOP_RETURN(DECR); }
	381	"==" { NAMEDOP_RETURN(EQ); }
	382	"!=" { NAMEDOP_RETURN(NE); }
	383	"<<" { NAMEDOP_RETURN(LS); }
	384	">>" { NAMEDOP_RETURN(RS); }
	385	"<=" { NAMEDOP_RETURN(LE); }
	386	">=" { NAMEDOP_RETURN(GE); }
	387	"&&" { NAMEDOP_RETURN(ANDAND); }
	388	"\|\|" { NAMEDOP_RETURN(OROR); }
	389	"->" { NAMEDOP_RETURN(ARROW); }
	390	"+=" { NAMEDOP_RETURN(PLUSassign); }
	391	"-=" { NAMEDOP_RETURN(MINUSassign); }
[e5f2a67]	392	"\\=" { NAMEDOP_RETURN(EXPassign); } // CFA, exponentiation
[3848e0e]	393	"*=" { NAMEDOP_RETURN(MULTassign); }
	394	"/=" { NAMEDOP_RETURN(DIVassign); }
	395	"%=" { NAMEDOP_RETURN(MODassign); }
	396	"&=" { NAMEDOP_RETURN(ANDassign); }
	397	"\|=" { NAMEDOP_RETURN(ORassign); }
	398	"^=" { NAMEDOP_RETURN(ERassign); }
	399	"<<=" { NAMEDOP_RETURN(LSassign); }
	400	">>=" { NAMEDOP_RETURN(RSassign); }
[51b7345]	401
[08061589]	402	"@=" { NAMEDOP_RETURN(ATassign); } // CFA
[097e2b0]	403
[b87a5ed]	404	/* CFA, operator identifier */
	405	{op_unary}"?" { IDENTIFIER_RETURN(); } // unary
[a61fea9a]	406	"?"({op_unary_pre_post}\|"()"\|"[?]"\|"{}") { IDENTIFIER_RETURN(); }
[76c62b2]	407	"^?{}" { IDENTIFIER_RETURN(); }
	408	"?`"{identifier} { IDENTIFIER_RETURN(); } // unit operator
[b87a5ed]	409	"?"{op_binary_over}"?" { IDENTIFIER_RETURN(); } // binary
[51b7345]	410	/*
[daf9671]	411	This rule handles ambiguous cases with operator identifiers, e.g., "int ??()", where the string "??" can be
	412	lexed as "?"/"?" or ""/"??". Since it is common practise to put a unary operator juxtaposed to an identifier,
	413	e.g., "*i", users will be annoyed if they cannot do this with respect to operator identifiers. Therefore, there is
	414	a lexical look-ahead for the second case, with backtracking to return the leading unary operator and then
	415	reparsing the trailing operator identifier. Otherwise a space is needed between the unary operator and operator
	416	identifier to disambiguate this common case.
	417
	418	A similar issue occurs with the dereference, *?(...), and routine-call, ?()(...) identifiers. The ambiguity
	419	occurs when the deference operator has no parameters, ?() and ?()(...), requiring arbitrary whitespace
	420	look-ahead for the routine-call parameter-list to disambiguate. However, the dereference operator must have a
	421	parameter/argument to dereference ?(...). Hence, always interpreting the string ?() as * ?() does not preclude
	422	any meaningful program.
	423
	424	The remaining cases are with the increment/decrement operators and conditional expression:
	425
	426	i++? ...(...);
	427	i?++ ...(...);
	428
	429	requiring arbitrary whitespace look-ahead for the operator parameter-list, even though that interpretation is an
	430	incorrect expression (juxtaposed identifiers). Therefore, it is necessary to disambiguate these cases with a
	431	space:
	432
	433	i++ ? i : 0;
	434	i? ++i : 0;
[51b7345]	435	*/
[daf9671]	436	{op_unary}"?"({op_unary_pre_post}\|"()"\|"[?]"\|{op_binary_over}"?") {
[b87a5ed]	437	// 1 or 2 character unary operator ?
	438	int i = yytext[1] == '?' ? 1 : 2;
	439	yyless( i ); // put back characters up to first '?'
	440	if ( i > 1 ) {
	441	NAMEDOP_RETURN( yytext[0] == '+' ? ICR : DECR );
	442	} else {
	443	ASCIIOP_RETURN();
	444	} // if
	445	}
	446
[9ed4f94]	447	/* unknown character */
	448	. { yyerror( "unknown character" ); }
[51b7345]	449
	450	%%
[9ed4f94]	451	// ----end of lexer----
	452
	453	void yyerror( const char * errmsg ) {
	454	cout << (yyfilename ? yyfilename : "unknown file") << ':' << yylineno << ':' << column - yyleng + 1
[a16764a6]	455	<< ": " << ErrorHelpers::error_str() << errmsg << " at token \"" << (yytext[0] == '\0' ? "EOF" : yytext) << '"' << endl;
[9ed4f94]	456	}
[51b7345]	457
[b87a5ed]	458	// Local Variables: //
	459	// mode: c++ //
[de62360d]	460	// tab-width: 4 //
[b87a5ed]	461	// compile-command: "make install" //
	462	// End: //

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