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source: src/Parser/ExpressionNode.cc@ bb7422a

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ADT ast-experimental

Last change on this file since bb7422a was bb7422a, checked in by Andrew Beach <ajbeach@…>, 2 years ago
Translated parser to the new ast. This incuded a small fix in the resolver so larger expressions can be used in with statements and some updated tests. errors/declaration just is a formatting update. attributes now actually preserves more attributes (unknown if all versions work).
Property mode set to `100644`
File size: 28.8 KB

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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.
6	//
7	// ExpressionNode.cc --
8	//
9	// Author : Peter A. Buhr
10	// Created On : Sat May 16 13:17:07 2015
11	// Last Modified By : Andrew Beach
12	// Last Modified On : Tue Apr 4 11:07:00 2023
13	// Update Count : 1083
14	//
15
16	#include <cassert> // for assert
17	#include <stdio.h> // for sscanf, size_t
18	#include <climits> // for LLONG_MAX, LONG_MAX, INT_MAX, UINT...
19	#include <list> // for list
20	#include <sstream> // for basic_istream::operator>>, basic_i...
21	#include <string> // for string, operator+, operator==
22
23	#include "AST/Expr.hpp" // for NameExpr
24	#include "AST/Type.hpp" // for BaseType, SueInstType
25	#include "Common/SemanticError.h" // for SemanticError
26	#include "Common/utility.h" // for maybeMoveBuild, maybeBuild, CodeLo...
27	#include "ParseNode.h" // for ExpressionNode, maybeMoveBuildType
28	#include "parserutility.h" // for notZeroExpr
29
30	using namespace std;
31
32	//##############################################################################
33
34	// Difficult to separate extra parts of constants during lexing because actions are not allow in the middle of patterns:
35	//
36	// prefix action constant action suffix
37	//
38	// Alternatively, breaking a pattern using BEGIN does not work if the following pattern can be empty:
39	//
40	// constant BEGIN CONT ...
41	// <CONT>(...)? BEGIN 0 ... // possible empty suffix
42	//
43	// because the CONT rule is NOT triggered if the pattern is empty. Hence, constants are reparsed here to determine their
44	// type.
45
46	// static inline bool checkH( char c ) { return c == 'h' \|\| c == 'H'; }
47	// static inline bool checkZ( char c ) { return c == 'z' \|\| c == 'Z'; }
48	// static inline bool checkU( char c ) { return c == 'u' \|\| c == 'U'; }
49	static inline bool checkF( char c ) { return c == 'f' \|\| c == 'F'; }
50	static inline bool checkD( char c ) { return c == 'd' \|\| c == 'D'; }
51	static inline bool checkF80( char c ) { return c == 'w' \|\| c == 'W'; }
52	static inline bool checkF128( char c ) { return c == 'q' \|\| c == 'Q'; }
53	static inline bool checkL( char c ) { return c == 'l' \|\| c == 'L'; }
54	static inline bool checkI( char c ) { return c == 'i' \|\| c == 'I'; }
55	static inline bool checkB( char c ) { return c == 'b' \|\| c == 'B'; }
56	static inline bool checkX( char c ) { return c == 'x' \|\| c == 'X'; }
57	// static inline bool checkN( char c ) { return c == 'n' \|\| c == 'N'; }
58
59	void lnthSuffix( string & str, int & type, int & ltype ) {
60	// 'u' can appear before or after length suffix
61	string::size_type posn = str.find_last_of( "lL" );
62
63	if ( posn == string::npos ) return; // no suffix
64	size_t end = str.length() - 1;
65	if ( posn == end ) { type = 3; return; } // no length after 'l' => long
66
67	string::size_type next = posn + 1; // advance to length
68	if ( str[next] == '3' ) { // 32
69	type = ltype = 2;
70	} else if ( str[next] == '6' ) { // 64
71	type = ltype = 3;
72	} else if ( str[next] == '8' ) { // 8
73	type = ltype = 1;
74	} else if ( str[next] == '1' ) {
75	if ( str[next + 1] == '6' ) { // 16
76	type = ltype = 0;
77	} else { // 128
78	type = 5; ltype = 6;
79	} // if
80	} // if
81
82	char fix = '\0';
83	if ( str[end] == 'u' \|\| str[end] == 'U' ) fix = str[end]; // ends with 'uU' ?
84	str.erase( posn ); // remove length suffix and possibly uU
85	if ( type == 5 ) { // L128 does not need uU
86	end = str.length() - 1;
87	if ( str[end] == 'u' \|\| str[end] == 'U' ) str.erase( end ); // ends with 'uU' ? remove
88	} else if ( fix != '\0' ) str += fix; // put 'uU' back if removed
89	} // lnthSuffix
90
91	void valueToType( unsigned long long int & v, bool dec, int & type, bool & Unsigned ) {
92	// use value to determine type
93	if ( v <= INT_MAX ) { // signed int
94	type = 2;
95	} else if ( v <= UINT_MAX && ! dec ) { // unsigned int
96	type = 2;
97	Unsigned = true; // unsigned
98	} else if ( v <= LONG_MAX ) { // signed long int
99	type = 3;
100	} else if ( v <= ULONG_MAX && ( ! dec \|\| LONG_MAX == LLONG_MAX ) ) { // signed long int
101	type = 3;
102	Unsigned = true; // unsigned long int
103	} else if ( v <= LLONG_MAX ) { // signed long long int
104	type = 4;
105	} else { // unsigned long long int
106	type = 4;
107	Unsigned = true; // unsigned long long int
108	} // if
109	} // valueToType
110
111	static void scanbin( string & str, unsigned long long int & v ) {
112	v = 0;
113	size_t last = str.length() - 1; // last subscript of constant
114	for ( unsigned int i = 2;; ) { // ignore prefix
115	if ( str[i] == '1' ) v \|= 1;
116	i += 1;
117	if ( i == last - 1 \|\| (str[i] != '0' && str[i] != '1') ) break;
118	v <<= 1;
119	} // for
120	} // scanbin
121
122	ast::Expr * build_constantInteger(
123	const CodeLocation & location, string & str ) {
124	static const ast::BasicType::Kind kind[2][6] = {
125	// short (h) must be before char (hh) because shorter type has the longer suffix
126	{ ast::BasicType::ShortSignedInt, ast::BasicType::SignedChar, ast::BasicType::SignedInt, ast::BasicType::LongSignedInt, ast::BasicType::LongLongSignedInt, /* BasicType::SignedInt128 */ ast::BasicType::LongLongSignedInt, },
127	{ ast::BasicType::ShortUnsignedInt, ast::BasicType::UnsignedChar, ast::BasicType::UnsignedInt, ast::BasicType::LongUnsignedInt, ast::BasicType::LongLongUnsignedInt, /* BasicType::UnsignedInt128 */ ast::BasicType::LongLongUnsignedInt, },
128	};
129
130	static const char * lnthsInt[2][6] = {
131	{ "int16_t", "int8_t", "int32_t", "int64_t", "size_t", "uintptr_t", },
132	{ "uint16_t", "uint8_t", "uint32_t", "uint64_t", "size_t", "uintptr_t", },
133	}; // lnthsInt
134
135	string str2( "0x0" );
136	unsigned long long int v, v2 = 0; // converted integral value
137	ast::Expr * ret, * ret2;
138
139	int type = -1; // 0 => short, 1 => char, 2 => int, 3 => long int, 4 => long long int, 5 => int128
140	int ltype = -1; // 0 => 16 bits, 1 => 8 bits, 2 => 32 bits, 3 => 64 bits, 4 => size_t, 5 => intptr, 6 => pointer
141	bool dec = true, Unsigned = false; // decimal, unsigned constant
142
143	// special constants
144	if ( str == "0" ) {
145	ret = new ast::ConstantExpr( location, new ast::ZeroType(), str, 0 );
146	goto CLEANUP;
147	} // if
148	if ( str == "1" ) {
149	ret = new ast::ConstantExpr( location, new ast::OneType(), str, 1 );
150	goto CLEANUP;
151	} // if
152
153	// 'u' can appear before or after length suffix
154	if ( str.find_last_of( "uU" ) != string::npos ) Unsigned = true;
155
156	if ( isdigit( str[str.length() - 1] ) ) { // no suffix ?
157	lnthSuffix( str, type, ltype ); // could have length suffix
158	} else {
159	// At least one digit in integer constant, so safe to backup while looking for suffix.
160	// This declaration and the comma expressions in the conditions mimic
161	// the declare and check pattern allowed in later compiler versions.
162	// (Only some early compilers/C++ standards do not support it.)
163	string::size_type posn;
164	// pointer value
165	if ( posn = str.find_last_of( "pP" ), posn != string::npos ) {
166	ltype = 5; str.erase( posn, 1 );
167	// size_t
168	} else if ( posn = str.find_last_of( "zZ" ), posn != string::npos ) {
169	Unsigned = true; type = 2; ltype = 4; str.erase( posn, 1 );
170	// signed char
171	} else if ( posn = str.rfind( "hh" ), posn != string::npos ) {
172	type = 1; str.erase( posn, 2 );
173	// signed char
174	} else if ( posn = str.rfind( "HH" ), posn != string::npos ) {
175	type = 1; str.erase( posn, 2 );
176	// short
177	} else if ( posn = str.find_last_of( "hH" ), posn != string::npos ) {
178	type = 0; str.erase( posn, 1 );
179	// int (natural number)
180	} else if ( posn = str.find_last_of( "nN" ), posn != string::npos ) {
181	type = 2; str.erase( posn, 1 );
182	} else if ( str.rfind( "ll" ) != string::npos \|\| str.rfind( "LL" ) != string::npos ) {
183	type = 4;
184	} else {
185	lnthSuffix( str, type, ltype );
186	} // if
187	} // if
188
189	// Cannot be just "0"/"1"; sscanf stops at the suffix, if any; value goes over the wall => always generate
190
191	#if ! defined(__SIZEOF_INT128__)
192	if ( type == 5 ) SemanticError( yylloc, "int128 constant is not supported on this target " + str );
193	#endif // ! __SIZEOF_INT128__
194
195	if ( str[0] == '0' ) { // radix character ?
196	dec = false;
197	if ( checkX( str[1] ) ) { // hex constant ?
198	if ( type < 5 ) { // not L128 ?
199	sscanf( (char *)str.c_str(), "%llx", &v );
200	#if defined(__SIZEOF_INT128__)
201	} else { // hex int128 constant
202	unsigned int len = str.length();
203	if ( len > (2 + 16 + 16) ) SemanticError( yylloc, "128-bit hexadecimal constant to large " + str );
204	// hex digits < 2^64
205	if ( len > (2 + 16) ) {
206	str2 = "0x" + str.substr( len - 16 );
207	sscanf( (char *)str2.c_str(), "%llx", &v2 );
208	str = str.substr( 0, len - 16 );
209	} // if
210	sscanf( (char *)str.c_str(), "%llx", &v );
211	#endif // __SIZEOF_INT128__
212	} // if
213	//printf( "%llx %llu\n", v, v );
214	} else if ( checkB( str[1] ) ) { // binary constant ?
215	#if defined(__SIZEOF_INT128__)
216	unsigned int len = str.length();
217	if ( type == 5 && len > 2 + 64 ) {
218	if ( len > 2 + 64 + 64 ) SemanticError( yylloc, "128-bit binary constant to large " + str );
219	str2 = "0b" + str.substr( len - 64 );
220	str = str.substr( 0, len - 64 );
221	scanbin( str2, v2 );
222	} // if
223	#endif // __SIZEOF_INT128__
224	scanbin( str, v );
225	//printf( "%#llx %llu\n", v, v );
226	} else { // octal constant
227	if ( type < 5 ) { // not L128 ?
228	sscanf( (char *)str.c_str(), "%llo", &v );
229	#if defined(__SIZEOF_INT128__)
230	} else { // octal int128 constant
231	unsigned int len = str.length();
232	if ( len > 1 + 43 \|\| (len == 1 + 43 && str[0] > '3') ) SemanticError( yylloc, "128-bit octal constant to large " + str );
233	char buf[32];
234	if ( len <= 1 + 21 ) { // value < 21 octal digitis
235	sscanf( (char *)str.c_str(), "%llo", &v );
236	} else {
237	sscanf( &str[len - 21], "%llo", &v );
238	__int128 val = v; // accumulate bits
239	str[len - 21] ='\0'; // shorten string
240	sscanf( &str[len == 43 ? 1 : 0], "%llo", &v );
241	val \|= (__int128)v << 63; // store bits
242	if ( len == 1 + 43 ) { // most significant 2 bits ?
243	str[2] = '\0'; // shorten string
244	sscanf( &str[1], "%llo", &v ); // process most significant 2 bits
245	val \|= (__int128)v << 126; // store bits
246	} // if
247	v = val >> 64; v2 = (uint64_t)val; // replace octal constant with 2 hex constants
248	sprintf( buf, "%#llx", v2 );
249	str2 = buf;
250	} // if
251	sprintf( buf, "%#llx", v );
252	str = buf;
253	#endif // __SIZEOF_INT128__
254	} // if
255	//printf( "%#llo %llu\n", v, v );
256	} // if
257	} else { // decimal constant ?
258	if ( type < 5 ) { // not L128 ?
259	sscanf( (char *)str.c_str(), "%llu", &v );
260	#if defined(__SIZEOF_INT128__)
261	} else { // decimal int128 constant
262	#define P10_UINT64 10'000'000'000'000'000'000ULL // 19 zeroes
263	unsigned int len = str.length();
264	if ( str.length() == 39 && str > (Unsigned ? "340282366920938463463374607431768211455" : "170141183460469231731687303715884105727") )
265	SemanticError( yylloc, "128-bit decimal constant to large " + str );
266	char buf[32];
267	if ( len <= 19 ) { // value < 19 decimal digitis
268	sscanf( (char *)str.c_str(), "%llu", &v );
269	} else {
270	sscanf( &str[len - 19], "%llu", &v );
271	__int128 val = v; // accumulate bits
272	str[len - 19] ='\0'; // shorten string
273	sscanf( &str[len == 39 ? 1 : 0], "%llu", &v );
274	val += (__int128)v * (__int128)P10_UINT64; // store bits
275	if ( len == 39 ) { // most significant 2 bits ?
276	str[1] = '\0'; // shorten string
277	sscanf( &str[0], "%llu", &v ); // process most significant 2 bits
278	val += (__int128)v * (__int128)P10_UINT64 * (__int128)P10_UINT64; // store bits
279	} // if
280	v = val >> 64; v2 = (uint64_t)val; // replace decimal constant with 2 hex constants
281	sprintf( buf, "%#llx", v2 );
282	str2 = buf;
283	} // if
284	sprintf( buf, "%#llx", v );
285	str = buf;
286	#endif // __SIZEOF_INT128__
287	} // if
288	//printf( "%llu\n", v );
289	} // if
290
291	if ( type == -1 ) { // no suffix => determine type from value size
292	valueToType( v, dec, type, Unsigned );
293	} // if
294	/* printf( "%s %llo %s %llo\n", str.c_str(), v, str2.c_str(), v2 ); */
295
296	//if ( !( 0 <= type && type <= 6 ) ) { printf( "%s %lu %d %s\n", fred.c_str(), fred.length(), type, str.c_str() ); }
297	assert( 0 <= type && type <= 6 );
298
299	// Constant type is correct for overload resolving.
300	ret = new ast::ConstantExpr( location,
301	new ast::BasicType( kind[Unsigned][type] ), str, v );
302	if ( Unsigned && type < 2 ) { // hh or h, less than int ?
303	// int i = -1uh => 65535 not -1, so cast is necessary for unsigned, which unfortunately eliminates warnings for large values.
304	ret = new ast::CastExpr( location,
305	ret,
306	new ast::BasicType( kind[Unsigned][type] ),
307	ast::ExplicitCast );
308	} else if ( ltype != -1 ) { // explicit length ?
309	if ( ltype == 6 ) { // int128, (int128)constant
310	ret2 = new ast::ConstantExpr( location,
311	new ast::BasicType( ast::BasicType::LongLongSignedInt ),
312	str2,
313	v2 );
314	ret = build_compoundLiteral( location,
315	DeclarationNode::newBasicType(
316	DeclarationNode::Int128
317	)->addType(
318	DeclarationNode::newSignedNess( DeclarationNode::Unsigned ) ),
319	new InitializerNode(
320	(InitializerNode *)(new InitializerNode( new ExpressionNode( v2 == 0 ? ret2 : ret ) ))->set_last( new InitializerNode( new ExpressionNode( v2 == 0 ? ret : ret2 ) ) ), true )
321	);
322	} else { // explicit length, (length_type)constant
323	ret = new ast::CastExpr( location,
324	ret,
325	new ast::TypeInstType( lnthsInt[Unsigned][ltype], ast::TypeDecl::Dtype ),
326	ast::ExplicitCast );
327	if ( ltype == 5 ) { // pointer, intptr( (uintptr_t)constant )
328	ret = build_func( location,
329	new ExpressionNode(
330	build_varref( location, new string( "intptr" ) ) ),
331	new ExpressionNode( ret ) );
332	} // if
333	} // if
334	} // if
335
336	CLEANUP: ;
337	delete &str; // created by lex
338	return ret;
339	} // build_constantInteger
340
341
342	static inline void checkFnxFloat( string & str, size_t last, bool & explnth, int & type ) {
343	string::size_type posn;
344	// floating-point constant has minimum of 2 characters, 1. or .1, so safe to look ahead
345	if ( str[1] == 'x' ) { // hex ?
346	posn = str.find_last_of( "pP" ); // back for exponent (must have)
347	posn = str.find_first_of( "fF", posn + 1 ); // forward for size (fF allowed in hex constant)
348	} else {
349	posn = str.find_last_of( "fF" ); // back for size (fF not allowed)
350	} // if
351	if ( posn == string::npos ) return;
352	explnth = true;
353	posn += 1; // advance to size
354	if ( str[posn] == '3' ) { // 32
355	if ( str[last] != 'x' ) type = 6;
356	else type = 7;
357	} else if ( str[posn] == '6' ) { // 64
358	if ( str[last] != 'x' ) type = 8;
359	else type = 9;
360	} else if ( str[posn] == '8' ) { // 80
361	type = 3;
362	} else if ( str[posn] == '1' ) { // 16/128
363	if ( str[posn + 1] == '6' ) { // 16
364	type = 5;
365	} else { // 128
366	if ( str[last] != 'x' ) type = 10;
367	else type = 11;
368	} // if
369	} else {
370	assertf( false, "internal error, bad floating point length %s", str.c_str() );
371	} // if
372	} // checkFnxFloat
373
374
375	ast::Expr * build_constantFloat(
376	const CodeLocation & location, string & str ) {
377	static const ast::BasicType::Kind kind[2][12] = {
378	{ ast::BasicType::Float, ast::BasicType::Double, ast::BasicType::LongDouble, ast::BasicType::uuFloat80, ast::BasicType::uuFloat128, ast::BasicType::uFloat16, ast::BasicType::uFloat32, ast::BasicType::uFloat32x, ast::BasicType::uFloat64, ast::BasicType::uFloat64x, ast::BasicType::uFloat128, ast::BasicType::uFloat128x },
379	{ ast::BasicType::FloatComplex, ast::BasicType::DoubleComplex, ast::BasicType::LongDoubleComplex, ast::BasicType::NUMBER_OF_BASIC_TYPES, ast::BasicType::NUMBER_OF_BASIC_TYPES, ast::BasicType::uFloat16Complex, ast::BasicType::uFloat32Complex, ast::BasicType::uFloat32xComplex, ast::BasicType::uFloat64Complex, ast::BasicType::uFloat64xComplex, ast::BasicType::uFloat128Complex, ast::BasicType::uFloat128xComplex },
380	};
381
382	// floating-point constant has minimum of 2 characters 1. or .1
383	size_t last = str.length() - 1;
384	double v;
385	int type; // 0 => float, 1 => double, 3 => long double, ...
386	bool complx = false; // real, complex
387	bool explnth = false; // explicit literal length
388
389	sscanf( str.c_str(), "%lg", &v );
390
391	if ( checkI( str[last] ) ) { // imaginary ?
392	complx = true;
393	last -= 1; // backup one character
394	} // if
395
396	if ( checkF( str[last] ) ) { // float ?
397	type = 0;
398	} else if ( checkD( str[last] ) ) { // double ?
399	type = 1;
400	} else if ( checkL( str[last] ) ) { // long double ?
401	type = 2;
402	} else if ( checkF80( str[last] ) ) { // __float80 ?
403	type = 3;
404	} else if ( checkF128( str[last] ) ) { // __float128 ?
405	type = 4;
406	} else {
407	type = 1; // double (default if no suffix)
408	checkFnxFloat( str, last, explnth, type );
409	} // if
410
411	if ( ! complx && checkI( str[last - 1] ) ) { // imaginary ?
412	complx = true;
413	} // if
414
415	assert( 0 <= type && type < 12 );
416	ast::Expr * ret = new ast::ConstantExpr( location,
417	new ast::BasicType( kind[complx][type] ),
418	str,
419	v );
420	// explicit length ?
421	if ( explnth ) {
422	ret = new ast::CastExpr( location,
423	ret,
424	new ast::BasicType( kind[complx][type] ),
425	ast::ExplicitCast );
426	} // if
427
428	delete &str; // created by lex
429	return ret;
430	} // build_constantFloat
431
432	static void sepString( string & str, string & units, char delimit ) {
433	string::size_type posn = str.find_last_of( delimit ) + 1;
434	if ( posn != str.length() ) {
435	units = "?" + str.substr( posn ); // extract units
436	str.erase( posn ); // remove units
437	} // if
438	} // sepString
439
440	ast::Expr * build_constantChar( const CodeLocation & location, string & str ) {
441	string units; // units
442	sepString( str, units, '\'' ); // separate constant from units
443
444	ast::Expr * ret = new ast::ConstantExpr( location,
445	new ast::BasicType( ast::BasicType::Char ),
446	str,
447	(unsigned long long int)(unsigned char)str[1] );
448	if ( units.length() != 0 ) {
449	ret = new ast::UntypedExpr( location,
450	new ast::NameExpr( location, units ),
451	{ ret } );
452	} // if
453
454	delete &str; // created by lex
455	return ret;
456	} // build_constantChar
457
458	ast::Expr * build_constantStr(
459	const CodeLocation & location,
460	string & str ) {
461	assert( str.length() > 0 );
462	string units; // units
463	sepString( str, units, '"' ); // separate constant from units
464
465	ast::Type * strtype;
466	switch ( str[0] ) { // str has >= 2 characters, i.e, null string "" => safe to look at subscripts 0/1
467	case 'u':
468	if ( str[1] == '8' ) goto Default; // utf-8 characters => array of char
469	// lookup type of associated typedef
470	strtype = new ast::TypeInstType( "char16_t", ast::TypeDecl::Dtype );
471	break;
472	case 'U':
473	strtype = new ast::TypeInstType( "char32_t", ast::TypeDecl::Dtype );
474	break;
475	case 'L':
476	strtype = new ast::TypeInstType( "wchar_t", ast::TypeDecl::Dtype );
477	break;
478	Default: // char default string type
479	default:
480	strtype = new ast::BasicType( ast::BasicType::Char );
481	} // switch
482	ast::ArrayType * at = new ast::ArrayType(
483	strtype,
484	// Length is adjusted: +1 for '\0' and -2 for '"'
485	ast::ConstantExpr::from_ulong( location, str.size() + 1 - 2 ),
486	ast::FixedLen,
487	ast::DynamicDim );
488	ast::Expr * ret = new ast::ConstantExpr( location, at, str, std::nullopt );
489	if ( units.length() != 0 ) {
490	ret = new ast::UntypedExpr( location,
491	new ast::NameExpr( location, units ),
492	{ ret } );
493	} // if
494
495	delete &str; // created by lex
496	return ret;
497	} // build_constantStr
498
499	ast::Expr * build_field_name_FLOATING_FRACTIONconstant(
500	const CodeLocation & location, const string & str ) {
501	if ( str.find_first_not_of( "0123456789", 1 ) != string::npos ) SemanticError( yylloc, "invalid tuple index " + str );
502	ast::Expr * ret = build_constantInteger( location,
503	*new string( str.substr(1) ) );
504	delete &str;
505	return ret;
506	} // build_field_name_FLOATING_FRACTIONconstant
507
508	ast::Expr * build_field_name_FLOATING_DECIMALconstant(
509	const CodeLocation & location, const string & str ) {
510	if ( str[str.size() - 1] != '.' ) SemanticError( yylloc, "invalid tuple index " + str );
511	ast::Expr * ret = build_constantInteger(
512	location, *new string( str.substr( 0, str.size()-1 ) ) );
513	delete &str;
514	return ret;
515	} // build_field_name_FLOATING_DECIMALconstant
516
517	ast::Expr * build_field_name_FLOATINGconstant( const CodeLocation & location,
518	const string & str ) {
519	// str is of the form A.B -> separate at the . and return member expression
520	int a, b;
521	char dot;
522	stringstream ss( str );
523	ss >> a >> dot >> b;
524	auto ret = new ast::UntypedMemberExpr( location,
525	ast::ConstantExpr::from_int( location, b ),
526	ast::ConstantExpr::from_int( location, a )
527	);
528	delete &str;
529	return ret;
530	} // build_field_name_FLOATINGconstant
531
532	ast::Expr * make_field_name_fraction_constants( const CodeLocation & location,
533	ast::Expr * fieldName,
534	ast::Expr * fracts ) {
535	if ( nullptr == fracts ) {
536	return fieldName;
537	} else if ( auto memberExpr = dynamic_cast<ast::UntypedMemberExpr *>( fracts ) ) {
538	memberExpr->member = make_field_name_fraction_constants( location,
539	fieldName,
540	ast::mutate( memberExpr->aggregate.get() ) );
541	return memberExpr;
542	} else {
543	return new ast::UntypedMemberExpr( location, fracts, fieldName );
544	} // if
545	} // make_field_name_fraction_constants
546
547	ast::Expr * build_field_name_fraction_constants( const CodeLocation & location,
548	ast::Expr * fieldName,
549	ExpressionNode * fracts ) {
550	return make_field_name_fraction_constants( location, fieldName, maybeMoveBuild( fracts ) );
551	} // build_field_name_fraction_constants
552
553	ast::NameExpr * build_varref( const CodeLocation & location,
554	const string * name ) {
555	ast::NameExpr * expr = new ast::NameExpr( location, *name );
556	delete name;
557	return expr;
558	} // build_varref
559
560	ast::QualifiedNameExpr * build_qualified_expr( const CodeLocation & location,
561	const DeclarationNode * decl_node,
562	const ast::NameExpr * name ) {
563	ast::Decl * newDecl = maybeBuild( decl_node );
564	if ( ast::DeclWithType * newDeclWithType = dynamic_cast<ast::DeclWithType *>( newDecl ) ) {
565	if ( const ast::Type * t = newDeclWithType->get_type() ) {
566	if ( auto typeInst = dynamic_cast<const ast::TypeInstType *>( t ) ) {
567	newDecl = new ast::EnumDecl( location, typeInst->name );
568	}
569	}
570	}
571	return new ast::QualifiedNameExpr( location, newDecl, name->name );
572	}
573
574	ast::QualifiedNameExpr * build_qualified_expr( const CodeLocation & location,
575	const ast::EnumDecl * decl,
576	const ast::NameExpr * name ) {
577	return new ast::QualifiedNameExpr( location, decl, name->name );
578	}
579
580	ast::DimensionExpr * build_dimensionref( const CodeLocation & location,
581	const string * name ) {
582	ast::DimensionExpr * expr = new ast::DimensionExpr( location, *name );
583	delete name;
584	return expr;
585	} // build_varref
586
587	// TODO: get rid of this and OperKinds and reuse code from OperatorTable
588	static const char * OperName[] = { // must harmonize with OperKinds
589	// diadic
590	"SizeOf", "AlignOf", "OffsetOf", "?+?", "?-?", "?\\?", "?*?", "?/?", "?%?", "\|\|", "&&",
591	"?\|?", "?&?", "?^?", "Cast", "?<<?", "?>>?", "?<?", "?>?", "?<=?", "?>=?", "?==?", "?!=?",
592	"?=?", "?@=?", "?\\=?", "?*=?", "?/=?", "?%=?", "?+=?", "?-=?", "?<<=?", "?>>=?", "?&=?", "?^=?", "?\|=?",
593	"?[?]", "...",
594	// monadic
595	"+?", "-?", "AddressOf", "*?", "!?", "~?", "++?", "?++", "--?", "?--",
596	}; // OperName
597
598	ast::Expr * build_cast( const CodeLocation & location,
599	DeclarationNode * decl_node,
600	ExpressionNode * expr_node ) {
601	ast::Type * targetType = maybeMoveBuildType( decl_node );
602	if ( dynamic_cast<ast::VoidType *>( targetType ) ) {
603	delete targetType;
604	return new ast::CastExpr( location,
605	maybeMoveBuild( expr_node ),
606	ast::ExplicitCast );
607	} else {
608	return new ast::CastExpr( location,
609	maybeMoveBuild( expr_node ),
610	targetType,
611	ast::ExplicitCast );
612	} // if
613	} // build_cast
614
615	ast::Expr * build_keyword_cast( const CodeLocation & location,
616	ast::AggregateDecl::Aggregate target,
617	ExpressionNode * expr_node ) {
618	return new ast::KeywordCastExpr( location,
619	maybeMoveBuild( expr_node ),
620	target
621	);
622	}
623
624	ast::Expr * build_virtual_cast( const CodeLocation & location,
625	DeclarationNode * decl_node,
626	ExpressionNode * expr_node ) {
627	return new ast::VirtualCastExpr( location,
628	maybeMoveBuild( expr_node ),
629	maybeMoveBuildType( decl_node )
630	);
631	} // build_virtual_cast
632
633	ast::Expr * build_fieldSel( const CodeLocation & location,
634	ExpressionNode * expr_node,
635	ast::Expr * member ) {
636	return new ast::UntypedMemberExpr( location,
637	member,
638	maybeMoveBuild( expr_node )
639	);
640	} // build_fieldSel
641
642	ast::Expr * build_pfieldSel( const CodeLocation & location,
643	ExpressionNode * expr_node,
644	ast::Expr * member ) {
645	auto deref = new ast::UntypedExpr( location,
646	new ast::NameExpr( location, "*?" )
647	);
648	deref->location = expr_node->location;
649	deref->args.push_back( maybeMoveBuild( expr_node ) );
650	auto ret = new ast::UntypedMemberExpr( location, member, deref );
651	return ret;
652	} // build_pfieldSel
653
654	ast::Expr * build_offsetOf( const CodeLocation & location,
655	DeclarationNode * decl_node,
656	ast::NameExpr * member ) {
657	ast::Expr * ret = new ast::UntypedOffsetofExpr( location,
658	maybeMoveBuildType( decl_node ),
659	member->name
660	);
661	ret->result = new ast::BasicType( ast::BasicType::LongUnsignedInt );
662	delete member;
663	return ret;
664	} // build_offsetOf
665
666	ast::Expr * build_and_or( const CodeLocation & location,
667	ExpressionNode * expr_node1,
668	ExpressionNode * expr_node2,
669	ast::LogicalFlag flag ) {
670	return new ast::LogicalExpr( location,
671	notZeroExpr( maybeMoveBuild( expr_node1 ) ),
672	notZeroExpr( maybeMoveBuild( expr_node2 ) ),
673	flag
674	);
675	} // build_and_or
676
677	ast::Expr * build_unary_val( const CodeLocation & location,
678	OperKinds op,
679	ExpressionNode * expr_node ) {
680	std::vector<ast::ptr<ast::Expr>> args;
681	args.push_back( maybeMoveBuild( expr_node ) );
682	return new ast::UntypedExpr( location,
683	new ast::NameExpr( location, OperName[ (int)op ] ),
684	std::move( args )
685	);
686	} // build_unary_val
687
688	ast::Expr * build_binary_val( const CodeLocation & location,
689	OperKinds op,
690	ExpressionNode * expr_node1,
691	ExpressionNode * expr_node2 ) {
692	std::vector<ast::ptr<ast::Expr>> args;
693	args.push_back( maybeMoveBuild( expr_node1 ) );
694	args.push_back( maybeMoveBuild( expr_node2 ) );
695	return new ast::UntypedExpr( location,
696	new ast::NameExpr( location, OperName[ (int)op ] ),
697	std::move( args )
698	);
699	} // build_binary_val
700
701	ast::Expr * build_binary_ptr( const CodeLocation & location,
702	OperKinds op,
703	ExpressionNode * expr_node1,
704	ExpressionNode * expr_node2 ) {
705	return build_binary_val( location, op, expr_node1, expr_node2 );
706	} // build_binary_ptr
707
708	ast::Expr * build_cond( const CodeLocation & location,
709	ExpressionNode * expr_node1,
710	ExpressionNode * expr_node2,
711	ExpressionNode * expr_node3 ) {
712	return new ast::ConditionalExpr( location,
713	notZeroExpr( maybeMoveBuild( expr_node1 ) ),
714	maybeMoveBuild( expr_node2 ),
715	maybeMoveBuild( expr_node3 )
716	);
717	} // build_cond
718
719	ast::Expr * build_tuple( const CodeLocation & location,
720	ExpressionNode * expr_node ) {
721	std::vector<ast::ptr<ast::Expr>> exprs;
722	buildMoveList( expr_node, exprs );
723	return new ast::UntypedTupleExpr( location, std::move( exprs ) );
724	} // build_tuple
725
726	ast::Expr * build_func( const CodeLocation & location,
727	ExpressionNode * function,
728	ExpressionNode * expr_node ) {
729	std::vector<ast::ptr<ast::Expr>> args;
730	buildMoveList( expr_node, args );
731	return new ast::UntypedExpr( location,
732	maybeMoveBuild( function ),
733	std::move( args )
734	);
735	} // build_func
736
737	ast::Expr * build_compoundLiteral( const CodeLocation & location,
738	DeclarationNode * decl_node,
739	InitializerNode * kids ) {
740	// compound literal type
741	ast::Decl * newDecl = maybeBuild( decl_node );
742	// non-sue compound-literal type
743	if ( ast::DeclWithType * newDeclWithType = dynamic_cast<ast::DeclWithType *>( newDecl ) ) {
744	return new ast::CompoundLiteralExpr( location,
745	newDeclWithType->get_type(),
746	maybeMoveBuild( kids ) );
747	// these types do not have associated type information
748	} else if ( auto newDeclStructDecl = dynamic_cast<ast::StructDecl *>( newDecl ) ) {
749	if ( newDeclStructDecl->body ) {
750	return new ast::CompoundLiteralExpr( location,
751	new ast::StructInstType( newDeclStructDecl ),
752	maybeMoveBuild( kids ) );
753	} else {
754	return new ast::CompoundLiteralExpr( location,
755	new ast::StructInstType( newDeclStructDecl->name ),
756	maybeMoveBuild( kids ) );
757	} // if
758	} else if ( auto newDeclUnionDecl = dynamic_cast<ast::UnionDecl *>( newDecl ) ) {
759	if ( newDeclUnionDecl->body ) {
760	return new ast::CompoundLiteralExpr( location,
761	new ast::UnionInstType( newDeclUnionDecl ),
762	maybeMoveBuild( kids ) );
763	} else {
764	return new ast::CompoundLiteralExpr( location,
765	new ast::UnionInstType( newDeclUnionDecl->name ),
766	maybeMoveBuild( kids ) );
767	} // if
768	} else if ( auto newDeclEnumDecl = dynamic_cast<ast::EnumDecl *>( newDecl ) ) {
769	if ( newDeclEnumDecl->body ) {
770	return new ast::CompoundLiteralExpr( location,
771	new ast::EnumInstType( newDeclEnumDecl ),
772	maybeMoveBuild( kids ) );
773	} else {
774	return new ast::CompoundLiteralExpr( location,
775	new ast::EnumInstType( newDeclEnumDecl->name ),
776	maybeMoveBuild( kids ) );
777	} // if
778	} else {
779	assert( false );
780	} // if
781	} // build_compoundLiteral
782
783	// Local Variables: //
784	// tab-width: 4 //
785	// End: //

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