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Last change on this file since fbcb354 was ad28abb, checked in by Peter A. Buhr <pabuhr@…>, 8 years ago
add space to error message for consistency with other messages
Property mode set to `100644`
File size: 17.2 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	*
[51b73452]	9	* Author : Peter A. Buhr
	10	* Created On : Sat Sep 22 08:58:10 2001
[926af74]	11	* Last Modified By : Peter A. Buhr
[ad28abb]	12	* Last Modified On : Wed Aug 30 17:35:21 2017
	13	* Update Count : 584
[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
[9ed4f94]	27	unsigned int column = 0; // position of the end of the last token parsed
	28	#define YY_USER_ACTION column += yyleng; // trigger before each matching rule's action
	29
[51b73452]	30	#include <string>
[f487962]	31	#include <cstdio> // FILENAME_MAX
[9ed4f94]	32	using namespace std;
[51b73452]	33
[984dce6]	34	#include "ParseNode.h"
	35	#include "TypedefTable.h"
[51b73452]	36
	37	char *yyfilename;
[9ed4f94]	38	string *strtext; // accumulate parts of character and string constant value
[51b73452]	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 )
[51b73452]	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 ) {
	59	if ( yytext[i] != '_' ) {
[e7aed49]	60	yytext[yyleng] = yytext[i];
	61	yyleng += 1;
[b87a5ed]	62	} // if
	63	} // for
	64	yytext[yyleng] = '\0';
[51b73452]	65	}
	66
[7812f1d1]	67	// Stop warning due to incorrectly generated flex code.
	68	#pragma GCC diagnostic ignored "-Wsign-compare"
[51b73452]	69	%}
	70
	71	octal [0-7]
	72	nonzero [1-9]
	73	decimal [0-9]
	74	hex [0-9a-fA-F]
[3848e0e]	75	universal_char "\\"((u"_"?{hex_quad})\|(U"_"?{hex_quad}{2}))
[51b73452]	76
[b87a5ed]	77	// identifier, GCC: $ in identifier
[51b73452]	78	identifier ([a-zA-Z_$]\|{universal_char})([0-9a-zA-Z_$]\|{universal_char})*
	79
[b87a5ed]	80	// attribute identifier, GCC: $ in identifier
[51b73452]	81	attr_identifier "@"{identifier}
	82
[b87a5ed]	83	// numeric constants, CFA: '_' in constant
[3848e0e]	84	hex_quad {hex}("_"?{hex}){3}
[ba2356b]	85	integer_suffix "_"?(([uU](("ll"\|"LL"\|[lL])[iI]\|[iI]?("ll"\|"LL"\|[lL])?))\|([iI](("ll"\|"LL"\|[lL])[uU]\|[uU]?("ll"\|"LL"\|[lL])?))\|(("ll"\|"LL"\|[lL])([iI][uU]\|[uU]?[iI]?)))
[51b73452]	86
	87	octal_digits ({octal})\|({octal}({octal}\|"_")*{octal})
	88	octal_prefix "0""_"?
	89	octal_constant (("0")\|({octal_prefix}{octal_digits})){integer_suffix}?
	90
	91	nonzero_digits ({nonzero})\|({nonzero}({decimal}\|"_")*{decimal})
	92	decimal_constant {nonzero_digits}{integer_suffix}?
	93
	94	hex_digits ({hex})\|({hex}({hex}\|"_")*{hex})
	95	hex_prefix "0"[xX]"_"?
	96	hex_constant {hex_prefix}{hex_digits}{integer_suffix}?
	97
	98	decimal_digits ({decimal})\|({decimal}({decimal}\|"_")*{decimal})
[0213af6]	99	real_decimal {decimal_digits}"."{exponent}?{floating_suffix}?
	100	real_fraction "."{decimal_digits}{exponent}?{floating_suffix}?
	101	real_constant {decimal_digits}{real_fraction}
[51b73452]	102	exponent "_"?[eE]"_"?[+-]?{decimal_digits}
[ba2356b]	103	// GCC: D (double) and iI (imaginary) suffixes, and DL (long double)
	104	floating_suffix "_"?([fFdDlL][iI]?\|[iI][lLfFdD]?\|"DL")
[1b29996]	105	floating_constant (({real_constant}{exponent}?)\|({decimal_digits}{exponent})){floating_suffix}?
[51b73452]	106
	107	binary_exponent "_"?[pP]"_"?[+-]?{decimal_digits}
	108	hex_fractional_constant ({hex_digits}?"."{hex_digits})\|({hex_digits}".")
	109	hex_floating_constant {hex_prefix}(({hex_fractional_constant}{binary_exponent})\|({hex_digits}{binary_exponent})){floating_suffix}?
	110
[b87a5ed]	111	// character escape sequence, GCC: \e => esc character
[51b73452]	112	simple_escape "\\"[abefnrtv'"?\\]
[b87a5ed]	113	// ' stop highlighting
[3848e0e]	114	octal_escape "\\"{octal}("_"?{octal}){0,2}
	115	hex_escape "\\""x""_"?{hex_digits}
[51b73452]	116	escape_seq {simple_escape}\|{octal_escape}\|{hex_escape}\|{universal_char}
[59db689]	117	cwide_prefix "L"\|"U"\|"u"
	118	swide_prefix {cwide_prefix}\|"u8"
[51b73452]	119
[b87a5ed]	120	// display/white-space characters
[51b73452]	121	h_tab [\011]
	122	form_feed [\014]
	123	v_tab [\013]
	124	c_return [\015]
	125	h_white [ ]\|{h_tab}
	126
[e7aed49]	127	// overloadable operators
[51b73452]	128	op_unary_only "~"\|"!"
	129	op_unary_binary "+"\|"-"\|"*"
	130	op_unary_pre_post "++"\|"--"
	131	op_unary {op_unary_only}\|{op_unary_binary}\|{op_unary_pre_post}
	132
[994d080]	133	op_binary_only "/"\|"%"\|"\\"\|"^"\|"&"\|"\|"\|"<"\|">"\|"="\|"=="\|"!="\|"<<"\|">>"\|"<="\|">="\|"+="\|"-="\|"*="\|"/="\|"%="\|"\\="\|"&="\|"\|="\|"^="\|"<<="\|">>="
[51b73452]	134	op_binary_over {op_unary_binary}\|{op_binary_only}
[e7aed49]	135	// op_binary_not_over "?"\|"->"\|"."\|"&&"\|"\|\|"\|"@="
	136	// operator {op_unary_pre_post}\|{op_binary_over}\|{op_binary_not_over}
[51b73452]	137
	138	%x COMMENT
[3848e0e]	139	%x BKQUOTE
	140	%x QUOTE
	141	%x STRING
[51b73452]	142
	143	%%
[994d080]	144	/* line directives */
[4040425]	145	^{h_white}"#"{h_white}[0-9]+{h_white}["][^"\n]+["]."\n" {
[8c17ab0]	146	/* " stop highlighting */
[c1c1112]	147	static char filename[FILENAME_MAX]; // temporarily store current source-file name
[51b73452]	148	char *end_num;
	149	char begin_string, end_string;
	150	long lineno, length;
	151	lineno = strtol( yytext + 1, &end_num, 0 );
	152	begin_string = strchr( end_num, '"' );
[f487962]	153	if ( begin_string ) { // file name ?
	154	end_string = strchr( begin_string + 1, '"' ); // look for ending delimiter
	155	assert( end_string ); // closing quote ?
	156	length = end_string - begin_string - 1; // file-name length without quotes or sentinel
	157	assert( length < FILENAME_MAX ); // room for sentinel ?
	158	memcpy( &filename, begin_string + 1, length ); // copy file name from yytext
	159	filename[ length ] = '\0'; // terminate string with sentinel
[9ed4f94]	160	//cout << "file " << filename << " line " << lineno << endl;
[f487962]	161	yylineno = lineno;
[c1c1112]	162	yyfilename = filename;
[b87a5ed]	163	} // if
[51b73452]	164	}
	165
[b87a5ed]	166	/* ignore preprocessor directives (for now) */
[51b73452]	167	^{h_white}"#"[^\n]"\n" ;
	168
[cd623a4]	169	/* ignore C style comments (ALSO HANDLED BY CPP) */
[3848e0e]	170	"/*" { BEGIN COMMENT; }
[cd623a4]	171	<COMMENT>.\|\n ;
	172	<COMMENT>"*/" { BEGIN 0; }
[51b73452]	173
[cd623a4]	174	/* ignore C++ style comments (ALSO HANDLED BY CPP) */
	175	"//"[^\n]*"\n" ;
[51b73452]	176
[b87a5ed]	177	/* ignore whitespace */
[3848e0e]	178	{h_white}+ { WHITE_RETURN(' '); }
	179	({v_tab}\|{c_return}\|{form_feed})+ { WHITE_RETURN(' '); }
	180	({h_white}\|{v_tab}\|{c_return}\|{form_feed})*"\n" { NEWLINE_RETURN(); }
[51b73452]	181
[b87a5ed]	182	/* keywords */
	183	_Alignas { KEYWORD_RETURN(ALIGNAS); } // C11
	184	_Alignof { KEYWORD_RETURN(ALIGNOF); } // C11
	185	__alignof { KEYWORD_RETURN(ALIGNOF); } // GCC
	186	__alignof__ { KEYWORD_RETURN(ALIGNOF); } // GCC
	187	asm { KEYWORD_RETURN(ASM); }
	188	__asm { KEYWORD_RETURN(ASM); } // GCC
	189	__asm__ { KEYWORD_RETURN(ASM); } // GCC
[02e5ab6]	190	_At { KEYWORD_RETURN(AT); } // CFA
[b87a5ed]	191	_Atomic { KEYWORD_RETURN(ATOMIC); } // C11
	192	__attribute { KEYWORD_RETURN(ATTRIBUTE); } // GCC
	193	__attribute__ { KEYWORD_RETURN(ATTRIBUTE); } // GCC
[3848e0e]	194	auto { KEYWORD_RETURN(AUTO); }
[b87a5ed]	195	_Bool { KEYWORD_RETURN(BOOL); } // C99
[3848e0e]	196	break { KEYWORD_RETURN(BREAK); }
	197	case { KEYWORD_RETURN(CASE); }
[b87a5ed]	198	catch { KEYWORD_RETURN(CATCH); } // CFA
[02e5ab6]	199	catchResume { KEYWORD_RETURN(CATCHRESUME); } // CFA
[3848e0e]	200	char { KEYWORD_RETURN(CHAR); }
[b87a5ed]	201	choose { KEYWORD_RETURN(CHOOSE); } // CFA
	202	_Complex { KEYWORD_RETURN(COMPLEX); } // C99
	203	__complex { KEYWORD_RETURN(COMPLEX); } // GCC
	204	__complex__ { KEYWORD_RETURN(COMPLEX); } // GCC
[3848e0e]	205	const { KEYWORD_RETURN(CONST); }
[b87a5ed]	206	__const { KEYWORD_RETURN(CONST); } // GCC
	207	__const__ { KEYWORD_RETURN(CONST); } // GCC
[3848e0e]	208	continue { KEYWORD_RETURN(CONTINUE); }
[e04b636]	209	coroutine { KEYWORD_RETURN(COROUTINE); } // CFA
[3848e0e]	210	default { KEYWORD_RETURN(DEFAULT); }
[02e5ab6]	211	disable { KEYWORD_RETURN(DISABLE); } // CFA
[b87a5ed]	212	do { KEYWORD_RETURN(DO); }
[3848e0e]	213	double { KEYWORD_RETURN(DOUBLE); }
[b87a5ed]	214	dtype { KEYWORD_RETURN(DTYPE); } // CFA
[3848e0e]	215	else { KEYWORD_RETURN(ELSE); }
[02e5ab6]	216	enable { KEYWORD_RETURN(ENABLE); } // CFA
[3848e0e]	217	enum { KEYWORD_RETURN(ENUM); }
[b87a5ed]	218	__extension__ { KEYWORD_RETURN(EXTENSION); } // GCC
[3848e0e]	219	extern { KEYWORD_RETURN(EXTERN); }
[08061589]	220	fallthrough { KEYWORD_RETURN(FALLTHRU); } // CFA
[b87a5ed]	221	fallthru { KEYWORD_RETURN(FALLTHRU); } // CFA
	222	finally { KEYWORD_RETURN(FINALLY); } // CFA
[3848e0e]	223	float { KEYWORD_RETURN(FLOAT); }
[b87a5ed]	224	__float128 { KEYWORD_RETURN(FLOAT); } // GCC
	225	for { KEYWORD_RETURN(FOR); }
	226	forall { KEYWORD_RETURN(FORALL); } // CFA
[3848e0e]	227	fortran { KEYWORD_RETURN(FORTRAN); }
[b87a5ed]	228	ftype { KEYWORD_RETURN(FTYPE); } // CFA
	229	_Generic { KEYWORD_RETURN(GENERIC); } // C11
[3848e0e]	230	goto { KEYWORD_RETURN(GOTO); }
[b87a5ed]	231	if { KEYWORD_RETURN(IF); }
	232	_Imaginary { KEYWORD_RETURN(IMAGINARY); } // C99
	233	__imag { KEYWORD_RETURN(IMAGINARY); } // GCC
	234	__imag__ { KEYWORD_RETURN(IMAGINARY); } // GCC
	235	inline { KEYWORD_RETURN(INLINE); } // C99
	236	__inline { KEYWORD_RETURN(INLINE); } // GCC
	237	__inline__ { KEYWORD_RETURN(INLINE); } // GCC
	238	int { KEYWORD_RETURN(INT); }
	239	__int128 { KEYWORD_RETURN(INT); } // GCC
[b15f6cf]	240	__int128_t { KEYWORD_RETURN(INT); } // GCC
[b87a5ed]	241	__label__ { KEYWORD_RETURN(LABEL); } // GCC
[3848e0e]	242	long { KEYWORD_RETURN(LONG); }
[6016c87]	243	monitor { KEYWORD_RETURN(MONITOR); } // CFA
[a7c90d4]	244	mutex { KEYWORD_RETURN(MUTEX); } // CFA
[b87a5ed]	245	_Noreturn { KEYWORD_RETURN(NORETURN); } // C11
[5721a6d]	246	__builtin_offsetof { KEYWORD_RETURN(OFFSETOF); } // GCC
[3a2128f]	247	one_t { NUMERIC_RETURN(ONE_T); } // CFA
[4040425]	248	otype { KEYWORD_RETURN(OTYPE); } // CFA
[3848e0e]	249	register { KEYWORD_RETURN(REGISTER); }
[b87a5ed]	250	restrict { KEYWORD_RETURN(RESTRICT); } // C99
	251	__restrict { KEYWORD_RETURN(RESTRICT); } // GCC
	252	__restrict__ { KEYWORD_RETURN(RESTRICT); } // GCC
[3848e0e]	253	return { KEYWORD_RETURN(RETURN); }
	254	short { KEYWORD_RETURN(SHORT); }
	255	signed { KEYWORD_RETURN(SIGNED); }
[b87a5ed]	256	__signed { KEYWORD_RETURN(SIGNED); } // GCC
	257	__signed__ { KEYWORD_RETURN(SIGNED); } // GCC
[3848e0e]	258	sizeof { KEYWORD_RETURN(SIZEOF); }
	259	static { KEYWORD_RETURN(STATIC); }
[b87a5ed]	260	_Static_assert { KEYWORD_RETURN(STATICASSERT); } // C11
[3848e0e]	261	struct { KEYWORD_RETURN(STRUCT); }
	262	switch { KEYWORD_RETURN(SWITCH); }
[bd4d011]	263	thread { KEYWORD_RETURN(THREAD); } // C11
[b87a5ed]	264	_Thread_local { KEYWORD_RETURN(THREADLOCAL); } // C11
	265	throw { KEYWORD_RETURN(THROW); } // CFA
[02e5ab6]	266	throwResume { KEYWORD_RETURN(THROWRESUME); } // CFA
[5b2edbc]	267	timeout { QKEYWORD_RETURN(TIMEOUT); } // CFA
[4040425]	268	trait { KEYWORD_RETURN(TRAIT); } // CFA
[b87a5ed]	269	try { KEYWORD_RETURN(TRY); } // CFA
[8f60f0b]	270	ttype { KEYWORD_RETURN(TTYPE); } // CFA
[3848e0e]	271	typedef { KEYWORD_RETURN(TYPEDEF); }
[b87a5ed]	272	typeof { KEYWORD_RETURN(TYPEOF); } // GCC
	273	__typeof { KEYWORD_RETURN(TYPEOF); } // GCC
	274	__typeof__ { KEYWORD_RETURN(TYPEOF); } // GCC
[b15f6cf]	275	__uint128_t { KEYWORD_RETURN(INT); } // GCC
[3848e0e]	276	union { KEYWORD_RETURN(UNION); }
	277	unsigned { KEYWORD_RETURN(UNSIGNED); }
[90c3b1c]	278	__builtin_va_list { KEYWORD_RETURN(VALIST); } // GCC
[72457b6]	279	virtual { KEYWORD_RETURN(VIRTUAL); } // CFA
[3848e0e]	280	void { KEYWORD_RETURN(VOID); }
	281	volatile { KEYWORD_RETURN(VOLATILE); }
[b87a5ed]	282	__volatile { KEYWORD_RETURN(VOLATILE); } // GCC
	283	__volatile__ { KEYWORD_RETURN(VOLATILE); } // GCC
[5b2edbc]	284	waitfor { KEYWORD_RETURN(WAITFOR); }
	285	or { QKEYWORD_RETURN(WOR); } // CFA
	286	when { KEYWORD_RETURN(WHEN); }
[3848e0e]	287	while { KEYWORD_RETURN(WHILE); }
[8b47e50]	288	with { KEYWORD_RETURN(WITH); } // CFA
[3a2128f]	289	zero_t { NUMERIC_RETURN(ZERO_T); } // CFA
[51b73452]	290
[b87a5ed]	291	/* identifier */
	292	{identifier} { IDENTIFIER_RETURN(); }
	293	{attr_identifier} { ATTRIBUTE_RETURN(); }
[c6b1105]	294	"`" { BEGIN BKQUOTE; }
[b87a5ed]	295	<BKQUOTE>{identifier} { IDENTIFIER_RETURN(); }
	296	<BKQUOTE>"`" { BEGIN 0; }
[51b73452]	297
[b87a5ed]	298	/* numeric constants */
[59db689]	299	{decimal_constant} { NUMERIC_RETURN(INTEGERconstant); }
	300	{octal_constant} { NUMERIC_RETURN(INTEGERconstant); }
	301	{hex_constant} { NUMERIC_RETURN(INTEGERconstant); }
[1b29996]	302	{real_decimal} { NUMERIC_RETURN(REALDECIMALconstant); } // must appear before floating_constant
	303	{real_fraction} { NUMERIC_RETURN(REALFRACTIONconstant); } // must appear before floating_constant
[3848e0e]	304	{floating_constant} { NUMERIC_RETURN(FLOATINGconstant); }
	305	{hex_floating_constant} { NUMERIC_RETURN(FLOATINGconstant); }
[51b73452]	306
[b87a5ed]	307	/* character constant, allows empty value */
[9ed4f94]	308	({cwide_prefix}[_]?)?['] { BEGIN QUOTE; rm_underscore(); strtext = new string( yytext, yyleng ); }
[c1c1112]	309	<QUOTE>[^'\\\n]* { strtext->append( yytext, yyleng ); }
	310	<QUOTE>['\n] { BEGIN 0; strtext->append( yytext, yyleng ); RETURN_STR(CHARACTERconstant); }
[b87a5ed]	311	/* ' stop highlighting */
[51b73452]	312
[b87a5ed]	313	/* string constant */
[9ed4f94]	314	({swide_prefix}[_]?)?["] { BEGIN STRING; rm_underscore(); strtext = new string( yytext, yyleng ); }
[c1c1112]	315	<STRING>[^"\\\n]* { strtext->append( yytext, yyleng ); }
	316	<STRING>["\n] { BEGIN 0; strtext->append( yytext, yyleng ); RETURN_STR(STRINGliteral); }
[b87a5ed]	317	/* " stop highlighting */
[51b73452]	318
[59db689]	319	/* common character/string constant */
[c1c1112]	320	<QUOTE,STRING>{escape_seq} { rm_underscore(); strtext->append( yytext, yyleng ); }
[cd623a4]	321	<QUOTE,STRING>"\\"{h_white}*"\n" {} // continuation (ALSO HANDLED BY CPP)
[c1c1112]	322	<QUOTE,STRING>"\\" { strtext->append( yytext, yyleng ); } // unknown escape character
[3848e0e]	323
[b87a5ed]	324	/* punctuation */
[615a096]	325	"@" { ASCIIOP_RETURN(); }
[b87a5ed]	326	"[" { ASCIIOP_RETURN(); }
	327	"]" { ASCIIOP_RETURN(); }
	328	"(" { ASCIIOP_RETURN(); }
	329	")" { ASCIIOP_RETURN(); }
	330	"{" { ASCIIOP_RETURN(); }
	331	"}" { ASCIIOP_RETURN(); }
	332	"," { ASCIIOP_RETURN(); } // also operator
	333	":" { ASCIIOP_RETURN(); }
	334	";" { ASCIIOP_RETURN(); }
	335	"." { ASCIIOP_RETURN(); } // also operator
[3848e0e]	336	"..." { NAMEDOP_RETURN(ELLIPSIS); }
	337
[b87a5ed]	338	/* alternative C99 brackets, "<:" & "<:<:" handled by preprocessor */
[3848e0e]	339	"<:" { RETURN_VAL('['); }
	340	":>" { RETURN_VAL(']'); }
	341	"<%" { RETURN_VAL('{'); }
	342	"%>" { RETURN_VAL('}'); }
[51b73452]	343
[b87a5ed]	344	/* operators */
	345	"!" { ASCIIOP_RETURN(); }
	346	"+" { ASCIIOP_RETURN(); }
	347	"-" { ASCIIOP_RETURN(); }
	348	"*" { ASCIIOP_RETURN(); }
[e5f2a67]	349	"\\" { ASCIIOP_RETURN(); } // CFA, exponentiation
[b87a5ed]	350	"/" { ASCIIOP_RETURN(); }
	351	"%" { ASCIIOP_RETURN(); }
	352	"^" { ASCIIOP_RETURN(); }
	353	"~" { ASCIIOP_RETURN(); }
	354	"&" { ASCIIOP_RETURN(); }
	355	"\|" { ASCIIOP_RETURN(); }
	356	"<" { ASCIIOP_RETURN(); }
	357	">" { ASCIIOP_RETURN(); }
	358	"=" { ASCIIOP_RETURN(); }
	359	"?" { ASCIIOP_RETURN(); }
[3848e0e]	360
	361	"++" { NAMEDOP_RETURN(ICR); }
	362	"--" { NAMEDOP_RETURN(DECR); }
	363	"==" { NAMEDOP_RETURN(EQ); }
	364	"!=" { NAMEDOP_RETURN(NE); }
	365	"<<" { NAMEDOP_RETURN(LS); }
	366	">>" { NAMEDOP_RETURN(RS); }
	367	"<=" { NAMEDOP_RETURN(LE); }
	368	">=" { NAMEDOP_RETURN(GE); }
	369	"&&" { NAMEDOP_RETURN(ANDAND); }
	370	"\|\|" { NAMEDOP_RETURN(OROR); }
	371	"->" { NAMEDOP_RETURN(ARROW); }
	372	"+=" { NAMEDOP_RETURN(PLUSassign); }
	373	"-=" { NAMEDOP_RETURN(MINUSassign); }
[e5f2a67]	374	"\\=" { NAMEDOP_RETURN(EXPassign); } // CFA, exponentiation
[3848e0e]	375	"*=" { NAMEDOP_RETURN(MULTassign); }
	376	"/=" { NAMEDOP_RETURN(DIVassign); }
	377	"%=" { NAMEDOP_RETURN(MODassign); }
	378	"&=" { NAMEDOP_RETURN(ANDassign); }
	379	"\|=" { NAMEDOP_RETURN(ORassign); }
	380	"^=" { NAMEDOP_RETURN(ERassign); }
	381	"<<=" { NAMEDOP_RETURN(LSassign); }
	382	">>=" { NAMEDOP_RETURN(RSassign); }
[51b73452]	383
[08061589]	384	"@=" { NAMEDOP_RETURN(ATassign); } // CFA
[097e2b0]	385
[b87a5ed]	386	/* CFA, operator identifier */
	387	{op_unary}"?" { IDENTIFIER_RETURN(); } // unary
[a61fea9a]	388	"?"({op_unary_pre_post}\|"()"\|"[?]"\|"{}") { IDENTIFIER_RETURN(); }
[02e5ab6]	389	"^?{}" { IDENTIFIER_RETURN(); }
[b87a5ed]	390	"?"{op_binary_over}"?" { IDENTIFIER_RETURN(); } // binary
[51b73452]	391	/*
[daf9671]	392	This rule handles ambiguous cases with operator identifiers, e.g., "int ??()", where the string "??" can be
	393	lexed as "?"/"?" or ""/"??". Since it is common practise to put a unary operator juxtaposed to an identifier,
	394	e.g., "*i", users will be annoyed if they cannot do this with respect to operator identifiers. Therefore, there is
	395	a lexical look-ahead for the second case, with backtracking to return the leading unary operator and then
	396	reparsing the trailing operator identifier. Otherwise a space is needed between the unary operator and operator
	397	identifier to disambiguate this common case.
	398
	399	A similar issue occurs with the dereference, *?(...), and routine-call, ?()(...) identifiers. The ambiguity
	400	occurs when the deference operator has no parameters, ?() and ?()(...), requiring arbitrary whitespace
	401	look-ahead for the routine-call parameter-list to disambiguate. However, the dereference operator must have a
	402	parameter/argument to dereference ?(...). Hence, always interpreting the string ?() as * ?() does not preclude
	403	any meaningful program.
	404
	405	The remaining cases are with the increment/decrement operators and conditional expression:
	406
	407	i++? ...(...);
	408	i?++ ...(...);
	409
	410	requiring arbitrary whitespace look-ahead for the operator parameter-list, even though that interpretation is an
	411	incorrect expression (juxtaposed identifiers). Therefore, it is necessary to disambiguate these cases with a
	412	space:
	413
	414	i++ ? i : 0;
	415	i? ++i : 0;
[51b73452]	416	*/
[daf9671]	417	{op_unary}"?"({op_unary_pre_post}\|"()"\|"[?]"\|{op_binary_over}"?") {
[b87a5ed]	418	// 1 or 2 character unary operator ?
	419	int i = yytext[1] == '?' ? 1 : 2;
	420	yyless( i ); // put back characters up to first '?'
	421	if ( i > 1 ) {
	422	NAMEDOP_RETURN( yytext[0] == '+' ? ICR : DECR );
	423	} else {
	424	ASCIIOP_RETURN();
	425	} // if
	426	}
	427
[9ed4f94]	428	/* unknown character */
	429	. { yyerror( "unknown character" ); }
[51b73452]	430
	431	%%
[9ed4f94]	432	// ----end of lexer----
	433
	434	void yyerror( const char * errmsg ) {
	435	cout << (yyfilename ? yyfilename : "unknown file") << ':' << yylineno << ':' << column - yyleng + 1
[ad28abb]	436	<< ": " << SemanticError::error_str() << errmsg << " at token \"" << (yytext[0] == '\0' ? "EOF" : yytext) << '"' << endl;
[9ed4f94]	437	}
[51b73452]	438
[b87a5ed]	439	// Local Variables: //
	440	// mode: c++ //
[de62360d]	441	// tab-width: 4 //
[b87a5ed]	442	// compile-command: "make install" //
	443	// End: //

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