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lex.l @ 843054c2

ADTaaron-thesisarm-ehast-experimentalcleanup-dtorsctordeferred_resndemanglerenumforall-pointer-decaygc_noraiijacob/cs343-translationjenkins-sandboxmemorynew-astnew-ast-unique-exprnew-envno_listpersistent-indexerpthread-emulationqualifiedEnumresolv-newstringwith_gc

Last change on this file since 843054c2 was 843054c2, checked in by Peter A. Buhr <pabuhr@…>, 9 years ago
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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.
[51b7345]	6	*
	7	* lex.l --
	8	*
	9	* Author : Peter A. Buhr
	10	* Created On : Sat Sep 22 08:58:10 2001
	11	* Last Modified By : Peter A. Buhr
[a08ba92]	12	* Last Modified On : Tue May 19 15:41:54 2015
	13	* Update Count : 331
[51b7345]	14	*/
	15
	16	%option yylineno
	17
	18	%{
[b87a5ed]	19	// This lexer assumes the program has been preprocessed by cpp. Hence, all user level preprocessor directive
	20	// have been performed and removed from the source. The only exceptions are preprocessor directives passed to
	21	// the compiler (e.g., line-number directives) and C/C++ style comments, which are ignored.
[51b7345]	22
[8c17ab0]	23	//************************** Includes and Defines **************************
[51b7345]	24
	25	#include <string>
	26
	27	#include "lex.h"
	28	#include "ParseNode.h"
[b87a5ed]	29	#include "cfa.tab.h" // YACC generated definitions based on C++ grammar
[51b7345]	30
	31	char *yyfilename;
[b87a5ed]	32	std::string *strtext; // accumulate parts of character and string constant value
[51b7345]	33
[b87a5ed]	34	#define WHITE_RETURN(x) // do nothing
[51b7345]	35	#define NEWLINE_RETURN() WHITE_RETURN('\n')
	36	#define RETURN_VAL(x) yylval.tok.str = new std::string(yytext); \
[b87a5ed]	37	yylval.tok.loc.file = yyfilename; \
	38	yylval.tok.loc.line = yylineno; \
	39	return(x)
[3848e0e]	40	#define RETURN_STR(x) yylval.tok.str = strtext; \
[b87a5ed]	41	yylval.tok.loc.file = yyfilename; \
	42	yylval.tok.loc.line = yylineno; \
	43	return(x)
[51b7345]	44
[b87a5ed]	45	#define KEYWORD_RETURN(x) RETURN_VAL(x) // keyword
[51b7345]	46	#define IDENTIFIER_RETURN() RETURN_VAL((typedefTable.isIdentifier(yytext) ? IDENTIFIER : typedefTable.isTypedef(yytext) ? TYPEDEFname : TYPEGENname))
[8c17ab0]	47	//#define ATTRIBUTE_RETURN() RETURN_VAL((typedefTable.isIdentifier(yytext) ? ATTR_IDENTIFIER : typedefTable.isTypedef(yytext) ? ATTR_TYPEDEFname : ATTR_TYPEGENname))
	48	#define ATTRIBUTE_RETURN() RETURN_VAL(ATTR_IDENTIFIER)
[51b7345]	49
[b87a5ed]	50	#define ASCIIOP_RETURN() RETURN_VAL((int)yytext[0]) // single character operator
	51	#define NAMEDOP_RETURN(x) RETURN_VAL(x) // multichar operator, with a name
[51b7345]	52
[8c17ab0]	53	#define NUMERIC_RETURN(x) rm_underscore(); RETURN_VAL(x) // numeric constant
[51b7345]	54
[3848e0e]	55	void rm_underscore() {
[b87a5ed]	56	// remove underscores in numeric constant
	57	int j = 0;
	58	for ( int i = 0; yytext[i] != '\0'; i += 1 ) {
	59	if ( yytext[i] != '_' ) {
	60	yytext[j] = yytext[i];
	61	j += 1;
	62	} // if
	63	} // for
	64	yyleng = j;
	65	yytext[yyleng] = '\0';
[51b7345]	66	}
	67
	68	%}
	69
	70	octal [0-7]
	71	nonzero [1-9]
	72	decimal [0-9]
	73	hex [0-9a-fA-F]
[3848e0e]	74	universal_char "\\"((u"_"?{hex_quad})\|(U"_"?{hex_quad}{2}))
[51b7345]	75
[b87a5ed]	76	// identifier, GCC: $ in identifier
[51b7345]	77	identifier ([a-zA-Z_$]\|{universal_char})([0-9a-zA-Z_$]\|{universal_char})*
	78
[b87a5ed]	79	// quoted identifier
[8c17ab0]	80	quoted_identifier "`"{identifier}"`"
	81
[b87a5ed]	82	// attribute identifier, GCC: $ in identifier
[51b7345]	83	attr_identifier "@"{identifier}
	84
[b87a5ed]	85	// numeric constants, CFA: '_' in constant
[3848e0e]	86	hex_quad {hex}("_"?{hex}){3}
[51b7345]	87	integer_suffix "_"?(([uU][lL]?)\|([uU]("ll"\|"LL")?)\|([lL][uU]?)\|("ll"\|"LL")[uU]?)
	88
	89	octal_digits ({octal})\|({octal}({octal}\|"_")*{octal})
	90	octal_prefix "0""_"?
	91	octal_constant (("0")\|({octal_prefix}{octal_digits})){integer_suffix}?
	92
	93	nonzero_digits ({nonzero})\|({nonzero}({decimal}\|"_")*{decimal})
	94	decimal_constant {nonzero_digits}{integer_suffix}?
	95
	96	hex_digits ({hex})\|({hex}({hex}\|"_")*{hex})
	97	hex_prefix "0"[xX]"_"?
	98	hex_constant {hex_prefix}{hex_digits}{integer_suffix}?
	99
	100	decimal_digits ({decimal})\|({decimal}({decimal}\|"_")*{decimal})
	101	fractional_constant ({decimal_digits}?"."{decimal_digits})\|({decimal_digits}".")
	102	exponent "_"?[eE]"_"?[+-]?{decimal_digits}
	103	floating_suffix "_"?[flFL]
	104	floating_constant (({fractional_constant}{exponent}?)\|({decimal_digits}{exponent})){floating_suffix}?
	105
	106	binary_exponent "_"?[pP]"_"?[+-]?{decimal_digits}
	107	hex_fractional_constant ({hex_digits}?"."{hex_digits})\|({hex_digits}".")
	108	hex_floating_constant {hex_prefix}(({hex_fractional_constant}{binary_exponent})\|({hex_digits}{binary_exponent})){floating_suffix}?
	109
[b87a5ed]	110	// character escape sequence, GCC: \e => esc character
[51b7345]	111	simple_escape "\\"[abefnrtv'"?\\]
[b87a5ed]	112	// ' stop highlighting
[3848e0e]	113	octal_escape "\\"{octal}("_"?{octal}){0,2}
	114	hex_escape "\\""x""_"?{hex_digits}
[51b7345]	115	escape_seq {simple_escape}\|{octal_escape}\|{hex_escape}\|{universal_char}
	116
[b87a5ed]	117	// display/white-space characters
[51b7345]	118	h_tab [\011]
	119	form_feed [\014]
	120	v_tab [\013]
	121	c_return [\015]
	122	h_white [ ]\|{h_tab}
	123
[b87a5ed]	124	// operators
[51b7345]	125	op_unary_only "~"\|"!"
	126	op_unary_binary "+"\|"-"\|"*"
	127	op_unary_pre_post "++"\|"--"
	128	op_unary {op_unary_only}\|{op_unary_binary}\|{op_unary_pre_post}
	129
	130	op_binary_only "/"\|"%"\|"^"\|"&"\|"\|"\|"<"\|">"\|"="\|"=="\|"!="\|"<<"\|">>"\|"<="\|">="\|"+="\|"-="\|"*="\|"/="\|"%="\|"&="\|"\|="\|"^="\|"<<="\|">>="
	131	op_binary_over {op_unary_binary}\|{op_binary_only}
	132	op_binary_not_over "?"\|"->"\|"&&"\|"\|\|"
	133	operator {op_unary_pre_post}\|{op_binary_over}\|{op_binary_not_over}
	134
	135	%x COMMENT
[3848e0e]	136	%x BKQUOTE
	137	%x QUOTE
	138	%x STRING
[51b7345]	139
	140	%%
[b87a5ed]	141	/* line directives */
[51b7345]	142	^{h_white}"#"{h_white}[0-9]+{h_white}["][^"\n]+["][^\n]"\n" {
[8c17ab0]	143	/* " stop highlighting */
[51b7345]	144	char *end_num;
	145	char begin_string, end_string;
	146	char *filename;
	147	long lineno, length;
	148	lineno = strtol( yytext + 1, &end_num, 0 );
	149	begin_string = strchr( end_num, '"' );
[3848e0e]	150	if ( begin_string ) {
[b87a5ed]	151	end_string = strchr( begin_string + 1, '"' );
	152	if ( end_string ) {
	153	length = end_string - begin_string - 1;
	154	filename = new char[ length + 1 ];
	155	memcpy( filename, begin_string + 1, length );
	156	filename[ length ] = '\0';
	157	//std::cout << "file " << filename << " line " << lineno << std::endl;
	158	yylineno = lineno;
	159	yyfilename = filename;
	160	} // if
	161	} // if
[51b7345]	162	}
	163
[b87a5ed]	164	/* ignore preprocessor directives (for now) */
[51b7345]	165	^{h_white}"#"[^\n]"\n" ;
	166
[b87a5ed]	167	/* ignore C style comments */
[3848e0e]	168	"/*" { BEGIN COMMENT; }
[51b7345]	169	<COMMENT>.\|\n ;
[3848e0e]	170	<COMMENT>"*/" { BEGIN 0; }
[51b7345]	171
[b87a5ed]	172	/* ignore C++ style comments */
[51b7345]	173	"//"[^\n]*"\n" ;
	174
[b87a5ed]	175	/* ignore whitespace */
[3848e0e]	176	{h_white}+ { WHITE_RETURN(' '); }
	177	({v_tab}\|{c_return}\|{form_feed})+ { WHITE_RETURN(' '); }
	178	({h_white}\|{v_tab}\|{c_return}\|{form_feed})*"\n" { NEWLINE_RETURN(); }
[51b7345]	179
[b87a5ed]	180	/* keywords */
	181	_Alignas { KEYWORD_RETURN(ALIGNAS); } // C11
	182	_Alignof { KEYWORD_RETURN(ALIGNOF); } // C11
	183	__alignof { KEYWORD_RETURN(ALIGNOF); } // GCC
	184	__alignof__ { KEYWORD_RETURN(ALIGNOF); } // GCC
	185	asm { KEYWORD_RETURN(ASM); }
	186	__asm { KEYWORD_RETURN(ASM); } // GCC
	187	__asm__ { KEYWORD_RETURN(ASM); } // GCC
	188	_Atomic { KEYWORD_RETURN(ATOMIC); } // C11
	189	__attribute { KEYWORD_RETURN(ATTRIBUTE); } // GCC
	190	__attribute__ { KEYWORD_RETURN(ATTRIBUTE); } // GCC
[3848e0e]	191	auto { KEYWORD_RETURN(AUTO); }
[b87a5ed]	192	_Bool { KEYWORD_RETURN(BOOL); } // C99
[3848e0e]	193	break { KEYWORD_RETURN(BREAK); }
	194	case { KEYWORD_RETURN(CASE); }
[b87a5ed]	195	catch { KEYWORD_RETURN(CATCH); } // CFA
[3848e0e]	196	char { KEYWORD_RETURN(CHAR); }
[b87a5ed]	197	choose { KEYWORD_RETURN(CHOOSE); } // CFA
	198	_Complex { KEYWORD_RETURN(COMPLEX); } // C99
	199	__complex { KEYWORD_RETURN(COMPLEX); } // GCC
	200	__complex__ { KEYWORD_RETURN(COMPLEX); } // GCC
[3848e0e]	201	const { KEYWORD_RETURN(CONST); }
[b87a5ed]	202	__const { KEYWORD_RETURN(CONST); } // GCC
	203	__const__ { KEYWORD_RETURN(CONST); } // GCC
	204	context { KEYWORD_RETURN(CONTEXT); } // CFA
[3848e0e]	205	continue { KEYWORD_RETURN(CONTINUE); }
	206	default { KEYWORD_RETURN(DEFAULT); }
[b87a5ed]	207	do { KEYWORD_RETURN(DO); }
[3848e0e]	208	double { KEYWORD_RETURN(DOUBLE); }
[b87a5ed]	209	dtype { KEYWORD_RETURN(DTYPE); } // CFA
[3848e0e]	210	else { KEYWORD_RETURN(ELSE); }
	211	enum { KEYWORD_RETURN(ENUM); }
[b87a5ed]	212	__extension__ { KEYWORD_RETURN(EXTENSION); } // GCC
[3848e0e]	213	extern { KEYWORD_RETURN(EXTERN); }
[b87a5ed]	214	fallthru { KEYWORD_RETURN(FALLTHRU); } // CFA
	215	finally { KEYWORD_RETURN(FINALLY); } // CFA
[3848e0e]	216	float { KEYWORD_RETURN(FLOAT); }
[b87a5ed]	217	__float128 { KEYWORD_RETURN(FLOAT); } // GCC
	218	for { KEYWORD_RETURN(FOR); }
	219	forall { KEYWORD_RETURN(FORALL); } // CFA
[3848e0e]	220	fortran { KEYWORD_RETURN(FORTRAN); }
[b87a5ed]	221	ftype { KEYWORD_RETURN(FTYPE); } // CFA
	222	_Generic { KEYWORD_RETURN(GENERIC); } // C11
[3848e0e]	223	goto { KEYWORD_RETURN(GOTO); }
[b87a5ed]	224	if { KEYWORD_RETURN(IF); }
	225	_Imaginary { KEYWORD_RETURN(IMAGINARY); } // C99
	226	__imag { KEYWORD_RETURN(IMAGINARY); } // GCC
	227	__imag__ { KEYWORD_RETURN(IMAGINARY); } // GCC
	228	inline { KEYWORD_RETURN(INLINE); } // C99
	229	__inline { KEYWORD_RETURN(INLINE); } // GCC
	230	__inline__ { KEYWORD_RETURN(INLINE); } // GCC
	231	int { KEYWORD_RETURN(INT); }
	232	__int128 { KEYWORD_RETURN(INT); } // GCC
	233	__label__ { KEYWORD_RETURN(LABEL); } // GCC
[3848e0e]	234	long { KEYWORD_RETURN(LONG); }
[b87a5ed]	235	lvalue { KEYWORD_RETURN(LVALUE); } // CFA
	236	_Noreturn { KEYWORD_RETURN(NORETURN); } // C11
[3848e0e]	237	register { KEYWORD_RETURN(REGISTER); }
[b87a5ed]	238	restrict { KEYWORD_RETURN(RESTRICT); } // C99
	239	__restrict { KEYWORD_RETURN(RESTRICT); } // GCC
	240	__restrict__ { KEYWORD_RETURN(RESTRICT); } // GCC
[3848e0e]	241	return { KEYWORD_RETURN(RETURN); }
	242	short { KEYWORD_RETURN(SHORT); }
	243	signed { KEYWORD_RETURN(SIGNED); }
[b87a5ed]	244	__signed { KEYWORD_RETURN(SIGNED); } // GCC
	245	__signed__ { KEYWORD_RETURN(SIGNED); } // GCC
[3848e0e]	246	sizeof { KEYWORD_RETURN(SIZEOF); }
	247	static { KEYWORD_RETURN(STATIC); }
[b87a5ed]	248	_Static_assert { KEYWORD_RETURN(STATICASSERT); } // C11
[3848e0e]	249	struct { KEYWORD_RETURN(STRUCT); }
	250	switch { KEYWORD_RETURN(SWITCH); }
[b87a5ed]	251	_Thread_local { KEYWORD_RETURN(THREADLOCAL); } // C11
	252	throw { KEYWORD_RETURN(THROW); } // CFA
	253	try { KEYWORD_RETURN(TRY); } // CFA
	254	type { KEYWORD_RETURN(TYPE); } // CFA
[3848e0e]	255	typedef { KEYWORD_RETURN(TYPEDEF); }
[b87a5ed]	256	typeof { KEYWORD_RETURN(TYPEOF); } // GCC
	257	__typeof { KEYWORD_RETURN(TYPEOF); } // GCC
	258	__typeof__ { KEYWORD_RETURN(TYPEOF); } // GCC
[3848e0e]	259	union { KEYWORD_RETURN(UNION); }
	260	unsigned { KEYWORD_RETURN(UNSIGNED); }
	261	void { KEYWORD_RETURN(VOID); }
	262	volatile { KEYWORD_RETURN(VOLATILE); }
[b87a5ed]	263	__volatile { KEYWORD_RETURN(VOLATILE); } // GCC
	264	__volatile__ { KEYWORD_RETURN(VOLATILE); } // GCC
[3848e0e]	265	while { KEYWORD_RETURN(WHILE); }
[51b7345]	266
[b87a5ed]	267	/* identifier */
	268	{identifier} { IDENTIFIER_RETURN(); }
	269	{attr_identifier} { ATTRIBUTE_RETURN(); }
[3848e0e]	270	"`" { BEGIN BKQUOTE; }
[b87a5ed]	271	<BKQUOTE>{identifier} { IDENTIFIER_RETURN(); }
	272	<BKQUOTE>"`" { BEGIN 0; }
[51b7345]	273
[b87a5ed]	274	/* numeric constants */
	275	"0" { NUMERIC_RETURN(ZERO); } // CFA
	276	"1" { NUMERIC_RETURN(ONE); } // CFA
[3848e0e]	277	{decimal_constant} { NUMERIC_RETURN(INTEGERconstant); }
	278	{octal_constant} { NUMERIC_RETURN(INTEGERconstant); }
	279	{hex_constant} { NUMERIC_RETURN(INTEGERconstant); }
	280	{floating_constant} { NUMERIC_RETURN(FLOATINGconstant); }
	281	{hex_floating_constant} { NUMERIC_RETURN(FLOATINGconstant); }
[51b7345]	282
[b87a5ed]	283	/* character constant, allows empty value */
[3848e0e]	284	"L"?"_"?['] { BEGIN QUOTE; rm_underscore(); strtext = new std::string; *strtext += std::string( yytext ); }
[b87a5ed]	285	<QUOTE>[^'\\\n]* { *strtext += std::string( yytext ); }
	286	<QUOTE>['\n] { BEGIN 0; *strtext += std::string( yytext); RETURN_STR(CHARACTERconstant); }
	287	/* ' stop highlighting */
[51b7345]	288
[b87a5ed]	289	/* string constant */
[3848e0e]	290	"L"?"_"?["] { BEGIN STRING; rm_underscore(); strtext = new std::string; *strtext += std::string( yytext ); }
[b87a5ed]	291	<STRING>[^"\\\n]* { *strtext += std::string( yytext ); }
	292	<STRING>["\n] { BEGIN 0; *strtext += std::string( yytext); RETURN_STR(STRINGliteral); }
	293	/* " stop highlighting */
[51b7345]	294
[3848e0e]	295	<QUOTE,STRING>{escape_seq} { rm_underscore(); *strtext += std::string( yytext ); }
	296	<QUOTE,STRING>[\\] { *strtext += std::string( yytext ); } // unknown escape character
	297
[b87a5ed]	298	/* punctuation */
	299	"[" { ASCIIOP_RETURN(); }
	300	"]" { ASCIIOP_RETURN(); }
	301	"(" { ASCIIOP_RETURN(); }
	302	")" { ASCIIOP_RETURN(); }
	303	"{" { ASCIIOP_RETURN(); }
	304	"}" { ASCIIOP_RETURN(); }
	305	"," { ASCIIOP_RETURN(); } // also operator
	306	":" { ASCIIOP_RETURN(); }
	307	";" { ASCIIOP_RETURN(); }
	308	"." { ASCIIOP_RETURN(); } // also operator
[3848e0e]	309	"..." { NAMEDOP_RETURN(ELLIPSIS); }
	310
[b87a5ed]	311	/* alternative C99 brackets, "<:" & "<:<:" handled by preprocessor */
[3848e0e]	312	"<:" { RETURN_VAL('['); }
	313	":>" { RETURN_VAL(']'); }
	314	"<%" { RETURN_VAL('{'); }
	315	"%>" { RETURN_VAL('}'); }
[51b7345]	316
[b87a5ed]	317	/* operators */
	318	"!" { ASCIIOP_RETURN(); }
	319	"+" { ASCIIOP_RETURN(); }
	320	"-" { ASCIIOP_RETURN(); }
	321	"*" { ASCIIOP_RETURN(); }
	322	"/" { ASCIIOP_RETURN(); }
	323	"%" { ASCIIOP_RETURN(); }
	324	"^" { ASCIIOP_RETURN(); }
	325	"~" { ASCIIOP_RETURN(); }
	326	"&" { ASCIIOP_RETURN(); }
	327	"\|" { ASCIIOP_RETURN(); }
	328	"<" { ASCIIOP_RETURN(); }
	329	">" { ASCIIOP_RETURN(); }
	330	"=" { ASCIIOP_RETURN(); }
	331	"?" { ASCIIOP_RETURN(); }
[3848e0e]	332
	333	"++" { NAMEDOP_RETURN(ICR); }
	334	"--" { NAMEDOP_RETURN(DECR); }
	335	"==" { NAMEDOP_RETURN(EQ); }
	336	"!=" { NAMEDOP_RETURN(NE); }
	337	"<<" { NAMEDOP_RETURN(LS); }
	338	">>" { NAMEDOP_RETURN(RS); }
	339	"<=" { NAMEDOP_RETURN(LE); }
	340	">=" { NAMEDOP_RETURN(GE); }
	341	"&&" { NAMEDOP_RETURN(ANDAND); }
	342	"\|\|" { NAMEDOP_RETURN(OROR); }
	343	"->" { NAMEDOP_RETURN(ARROW); }
	344	"+=" { NAMEDOP_RETURN(PLUSassign); }
	345	"-=" { NAMEDOP_RETURN(MINUSassign); }
	346	"*=" { NAMEDOP_RETURN(MULTassign); }
	347	"/=" { NAMEDOP_RETURN(DIVassign); }
	348	"%=" { NAMEDOP_RETURN(MODassign); }
	349	"&=" { NAMEDOP_RETURN(ANDassign); }
	350	"\|=" { NAMEDOP_RETURN(ORassign); }
	351	"^=" { NAMEDOP_RETURN(ERassign); }
	352	"<<=" { NAMEDOP_RETURN(LSassign); }
	353	">>=" { NAMEDOP_RETURN(RSassign); }
[51b7345]	354
[b87a5ed]	355	/* CFA, operator identifier */
	356	{op_unary}"?" { IDENTIFIER_RETURN(); } // unary
[3848e0e]	357	"?"({op_unary_pre_post}\|"()"\|"[?]") { IDENTIFIER_RETURN(); }
[b87a5ed]	358	"?"{op_binary_over}"?" { IDENTIFIER_RETURN(); } // binary
[51b7345]	359	/*
[b87a5ed]	360	This rule handles ambiguous cases with operator identifiers, e.g., "int ??()", where the string "??"
	361	can be lexed as ""/"??" or "?"/"?". Since it is common practise to put a unary operator juxtaposed
	362	to an identifier, e.g., "*i", users will be annoyed if they cannot do this with respect to operator
	363	identifiers. Even with this special hack, there are 5 general cases that cannot be handled. The first
	364	case is for the function-call identifier "?()":
[51b7345]	365
	366	int * ?()(); // declaration: space required after '*'
	367	* ?()(); // expression: space required after '*'
	368
[b87a5ed]	369	Without the space, the string "*?()" is ambiguous without N character look ahead; it requires scanning
	370	ahead to determine if there is a '(', which is the start of an argument/parameter list.
[51b7345]	371
	372	The 4 remaining cases occur in expressions:
	373
	374	i++?i:0; // space required before '?'
	375	i--?i:0; // space required before '?'
	376	i?++i:0; // space required after '?'
	377	i?--i:0; // space required after '?'
	378
[b87a5ed]	379	In the first two cases, the string "i++?" is ambiguous, where this string can be lexed as "i"/"++?" or
	380	"i++"/"?"; it requires scanning ahead to determine if there is a '(', which is the start of an argument
	381	list. In the second two cases, the string "?++x" is ambiguous, where this string can be lexed as
	382	"?++"/"x" or "?"/"++x"; it requires scanning ahead to determine if there is a '(', which is the start of
	383	an argument list.
[51b7345]	384	*/
	385	{op_unary}"?"(({op_unary_pre_post}\|"[?]")\|({op_binary_over}"?")) {
[b87a5ed]	386	// 1 or 2 character unary operator ?
	387	int i = yytext[1] == '?' ? 1 : 2;
	388	yyless( i ); // put back characters up to first '?'
	389	if ( i > 1 ) {
	390	NAMEDOP_RETURN( yytext[0] == '+' ? ICR : DECR );
	391	} else {
	392	ASCIIOP_RETURN();
	393	} // if
	394	}
	395
	396	/* unknown characters */
[3848e0e]	397	. { printf("unknown character(s):\"%s\" on line %d\n", yytext, yylineno); }
[51b7345]	398
	399	%%
	400
[b87a5ed]	401	// Local Variables: //
	402	// fill-column: 110 //
	403	// tab-width: 4 //
	404	// mode: c++ //
	405	// compile-command: "make install" //
	406	// End: //

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