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source: src/Parser/ExpressionNode.cc@ 044ae62

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Last change on this file since 044ae62 was 6611177, checked in by Andrew Beach <ajbeach@…>, 2 years ago
Clean-up in parser. ClauseNode rework, plus internal adjustments to reduce extra code and unchecked casts.
Property mode set to `100644`
File size: 28.6 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.
	6	//
[0caaa6a]	7	// ExpressionNode.cc --
	8	//
[f43df73]	9	// Author : Peter A. Buhr
[b87a5ed]	10	// Created On : Sat May 16 13:17:07 2015
[0d0931d]	11	// Last Modified By : Andrew Beach
[bb7422a]	12	// Last Modified On : Tue Apr 4 11:07:00 2023
	13	// Update Count : 1083
[0caaa6a]	14	//
[b87a5ed]	15
[c468150]	16	#include "ExpressionNode.h"
	17
[ea6332d]	18	#include <cassert> // for assert
[d180746]	19	#include <stdio.h> // for sscanf, size_t
	20	#include <climits> // for LLONG_MAX, LONG_MAX, INT_MAX, UINT...
	21	#include <list> // for list
	22	#include <sstream> // for basic_istream::operator>>, basic_i...
	23	#include <string> // for string, operator+, operator==
[51b73452]	24
[bb7422a]	25	#include "AST/Expr.hpp" // for NameExpr
	26	#include "AST/Type.hpp" // for BaseType, SueInstType
[d180746]	27	#include "Common/SemanticError.h" // for SemanticError
	28	#include "Common/utility.h" // for maybeMoveBuild, maybeBuild, CodeLo...
[c468150]	29	#include "DeclarationNode.h" // for DeclarationNode
	30	#include "InitializerNode.h" // for InitializerNode
[d180746]	31	#include "parserutility.h" // for notZeroExpr
	32
[51b73452]	33	using namespace std;
	34
[cd623a4]	35	//##############################################################################
	36
[7bf7fb9]	37	// Difficult to separate extra parts of constants during lexing because actions are not allow in the middle of patterns:
	38	//
	39	// prefix action constant action suffix
	40	//
	41	// Alternatively, breaking a pattern using BEGIN does not work if the following pattern can be empty:
	42	//
	43	// constant BEGIN CONT ...
	44	// <CONT>(...)? BEGIN 0 ... // possible empty suffix
	45	//
	46	// because the CONT rule is NOT triggered if the pattern is empty. Hence, constants are reparsed here to determine their
	47	// type.
	48
[ba01b14]	49	// static inline bool checkH( char c ) { return c == 'h' \|\| c == 'H'; }
	50	// static inline bool checkZ( char c ) { return c == 'z' \|\| c == 'Z'; }
	51	// static inline bool checkU( char c ) { return c == 'u' \|\| c == 'U'; }
[7bf7fb9]	52	static inline bool checkF( char c ) { return c == 'f' \|\| c == 'F'; }
	53	static inline bool checkD( char c ) { return c == 'd' \|\| c == 'D'; }
[ba01b14]	54	static inline bool checkF80( char c ) { return c == 'w' \|\| c == 'W'; }
	55	static inline bool checkF128( char c ) { return c == 'q' \|\| c == 'Q'; }
[f56c32e]	56	static inline bool checkL( char c ) { return c == 'l' \|\| c == 'L'; }
[7bf7fb9]	57	static inline bool checkI( char c ) { return c == 'i' \|\| c == 'I'; }
[0a2168f]	58	static inline bool checkB( char c ) { return c == 'b' \|\| c == 'B'; }
[7bf7fb9]	59	static inline bool checkX( char c ) { return c == 'x' \|\| c == 'X'; }
[3d8d7a7]	60	// static inline bool checkN( char c ) { return c == 'n' \|\| c == 'N'; }
[f56c32e]	61
	62	void lnthSuffix( string & str, int & type, int & ltype ) {
[c5b55c4]	63	// 'u' can appear before or after length suffix
[f56c32e]	64	string::size_type posn = str.find_last_of( "lL" );
[0a616e0]	65
	66	if ( posn == string::npos ) return; // no suffix
[c5b55c4]	67	size_t end = str.length() - 1;
	68	if ( posn == end ) { type = 3; return; } // no length after 'l' => long
[702e826]	69
[0a616e0]	70	string::size_type next = posn + 1; // advance to length
	71	if ( str[next] == '3' ) { // 32
	72	type = ltype = 2;
	73	} else if ( str[next] == '6' ) { // 64
	74	type = ltype = 3;
	75	} else if ( str[next] == '8' ) { // 8
	76	type = ltype = 1;
	77	} else if ( str[next] == '1' ) {
	78	if ( str[next + 1] == '6' ) { // 16
	79	type = ltype = 0;
	80	} else { // 128
	81	type = 5; ltype = 6;
[f56c32e]	82	} // if
	83	} // if
[c5b55c4]	84
	85	char fix = '\0';
	86	if ( str[end] == 'u' \|\| str[end] == 'U' ) fix = str[end]; // ends with 'uU' ?
	87	str.erase( posn ); // remove length suffix and possibly uU
	88	if ( type == 5 ) { // L128 does not need uU
	89	end = str.length() - 1;
	90	if ( str[end] == 'u' \|\| str[end] == 'U' ) str.erase( end ); // ends with 'uU' ? remove
	91	} else if ( fix != '\0' ) str += fix; // put 'uU' back if removed
[f56c32e]	92	} // lnthSuffix
[7bf7fb9]	93
[0a616e0]	94	void valueToType( unsigned long long int & v, bool dec, int & type, bool & Unsigned ) {
	95	// use value to determine type
	96	if ( v <= INT_MAX ) { // signed int
	97	type = 2;
	98	} else if ( v <= UINT_MAX && ! dec ) { // unsigned int
	99	type = 2;
	100	Unsigned = true; // unsigned
	101	} else if ( v <= LONG_MAX ) { // signed long int
	102	type = 3;
	103	} else if ( v <= ULONG_MAX && ( ! dec \|\| LONG_MAX == LLONG_MAX ) ) { // signed long int
	104	type = 3;
	105	Unsigned = true; // unsigned long int
	106	} else if ( v <= LLONG_MAX ) { // signed long long int
	107	type = 4;
	108	} else { // unsigned long long int
	109	type = 4;
	110	Unsigned = true; // unsigned long long int
	111	} // if
	112	} // valueToType
	113
[f6582252]	114	static void scanbin( string & str, unsigned long long int & v ) {
	115	v = 0;
	116	size_t last = str.length() - 1; // last subscript of constant
	117	for ( unsigned int i = 2;; ) { // ignore prefix
	118	if ( str[i] == '1' ) v \|= 1;
	119	i += 1;
[0d0931d]	120	if ( i == last - 1 \|\| (str[i] != '0' && str[i] != '1') ) break;
[f6582252]	121	v <<= 1;
	122	} // for
	123	} // scanbin
	124
[bb7422a]	125	ast::Expr * build_constantInteger(
	126	const CodeLocation & location, string & str ) {
	127	static const ast::BasicType::Kind kind[2][6] = {
[ba01b14]	128	// short (h) must be before char (hh) because shorter type has the longer suffix
[bb7422a]	129	{ ast::BasicType::ShortSignedInt, ast::BasicType::SignedChar, ast::BasicType::SignedInt, ast::BasicType::LongSignedInt, ast::BasicType::LongLongSignedInt, /* BasicType::SignedInt128 */ ast::BasicType::LongLongSignedInt, },
	130	{ ast::BasicType::ShortUnsignedInt, ast::BasicType::UnsignedChar, ast::BasicType::UnsignedInt, ast::BasicType::LongUnsignedInt, ast::BasicType::LongLongUnsignedInt, /* BasicType::UnsignedInt128 */ ast::BasicType::LongLongUnsignedInt, },
[7bf7fb9]	131	};
[76c62b2]	132
[0a616e0]	133	static const char * lnthsInt[2][6] = {
	134	{ "int16_t", "int8_t", "int32_t", "int64_t", "size_t", "uintptr_t", },
	135	{ "uint16_t", "uint8_t", "uint32_t", "uint64_t", "size_t", "uintptr_t", },
[ba01b14]	136	}; // lnthsInt
	137
[f6582252]	138	string str2( "0x0" );
	139	unsigned long long int v, v2 = 0; // converted integral value
[bb7422a]	140	ast::Expr * ret, * ret2;
[0a616e0]	141
	142	int type = -1; // 0 => short, 1 => char, 2 => int, 3 => long int, 4 => long long int, 5 => int128
	143	int ltype = -1; // 0 => 16 bits, 1 => 8 bits, 2 => 32 bits, 3 => 64 bits, 4 => size_t, 5 => intptr, 6 => pointer
	144	bool dec = true, Unsigned = false; // decimal, unsigned constant
[7bf7fb9]	145
[6165ce7]	146	// special constants
	147	if ( str == "0" ) {
[bb7422a]	148	ret = new ast::ConstantExpr( location, new ast::ZeroType(), str, 0 );
[6165ce7]	149	goto CLEANUP;
	150	} // if
	151	if ( str == "1" ) {
[bb7422a]	152	ret = new ast::ConstantExpr( location, new ast::OneType(), str, 1 );
[6165ce7]	153	goto CLEANUP;
	154	} // if
[ea6332d]	155
[f6582252]	156	// 'u' can appear before or after length suffix
	157	if ( str.find_last_of( "uU" ) != string::npos ) Unsigned = true;
	158
	159	if ( isdigit( str[str.length() - 1] ) ) { // no suffix ?
[f56c32e]	160	lnthSuffix( str, type, ltype ); // could have length suffix
	161	} else {
[15596d7]	162	// At least one digit in integer constant, so safe to backup while looking for suffix.
[52a2248]	163	// This declaration and the comma expressions in the conditions mimic
	164	// the declare and check pattern allowed in later compiler versions.
	165	// (Only some early compilers/C++ standards do not support it.)
[15596d7]	166	string::size_type posn;
	167	// pointer value
[52a2248]	168	if ( posn = str.find_last_of( "pP" ), posn != string::npos ) {
[15596d7]	169	ltype = 5; str.erase( posn, 1 );
[0d0931d]	170	// size_t
[52a2248]	171	} else if ( posn = str.find_last_of( "zZ" ), posn != string::npos ) {
[15596d7]	172	Unsigned = true; type = 2; ltype = 4; str.erase( posn, 1 );
[0d0931d]	173	// signed char
[52a2248]	174	} else if ( posn = str.rfind( "hh" ), posn != string::npos ) {
[15596d7]	175	type = 1; str.erase( posn, 2 );
[0d0931d]	176	// signed char
[52a2248]	177	} else if ( posn = str.rfind( "HH" ), posn != string::npos ) {
[15596d7]	178	type = 1; str.erase( posn, 2 );
[0d0931d]	179	// short
[52a2248]	180	} else if ( posn = str.find_last_of( "hH" ), posn != string::npos ) {
[15596d7]	181	type = 0; str.erase( posn, 1 );
[0d0931d]	182	// int (natural number)
[52a2248]	183	} else if ( posn = str.find_last_of( "nN" ), posn != string::npos ) {
[15596d7]	184	type = 2; str.erase( posn, 1 );
	185	} else if ( str.rfind( "ll" ) != string::npos \|\| str.rfind( "LL" ) != string::npos ) {
	186	type = 4;
	187	} else {
	188	lnthSuffix( str, type, ltype );
	189	} // if
	190	} // if
[7bf7fb9]	191
[f6582252]	192	// Cannot be just "0"/"1"; sscanf stops at the suffix, if any; value goes over the wall => always generate
[dbe8e31c]	193
[cf5af9c]	194	#if ! defined(__SIZEOF_INT128__)
[dbe8e31c]	195	if ( type == 5 ) SemanticError( yylloc, "int128 constant is not supported on this target " + str );
[cf5af9c]	196	#endif // ! __SIZEOF_INT128__
[702e826]	197
[f6582252]	198	if ( str[0] == '0' ) { // radix character ?
	199	dec = false;
	200	if ( checkX( str[1] ) ) { // hex constant ?
	201	if ( type < 5 ) { // not L128 ?
	202	sscanf( (char *)str.c_str(), "%llx", &v );
[c5b55c4]	203	#if defined(__SIZEOF_INT128__)
[f6582252]	204	} else { // hex int128 constant
	205	unsigned int len = str.length();
	206	if ( len > (2 + 16 + 16) ) SemanticError( yylloc, "128-bit hexadecimal constant to large " + str );
[702e826]	207	// hex digits < 2^64
	208	if ( len > (2 + 16) ) {
	209	str2 = "0x" + str.substr( len - 16 );
	210	sscanf( (char *)str2.c_str(), "%llx", &v2 );
	211	str = str.substr( 0, len - 16 );
[15596d7]	212	} // if
[f6582252]	213	sscanf( (char *)str.c_str(), "%llx", &v );
[c5b55c4]	214	#endif // __SIZEOF_INT128__
[f6582252]	215	} // if
	216	//printf( "%llx %llu\n", v, v );
	217	} else if ( checkB( str[1] ) ) { // binary constant ?
[c5b55c4]	218	#if defined(__SIZEOF_INT128__)
[013b028]	219	unsigned int len = str.length();
[f6582252]	220	if ( type == 5 && len > 2 + 64 ) {
	221	if ( len > 2 + 64 + 64 ) SemanticError( yylloc, "128-bit binary constant to large " + str );
	222	str2 = "0b" + str.substr( len - 64 );
	223	str = str.substr( 0, len - 64 );
	224	scanbin( str2, v2 );
	225	} // if
[c5b55c4]	226	#endif // __SIZEOF_INT128__
[f6582252]	227	scanbin( str, v );
	228	//printf( "%#llx %llu\n", v, v );
	229	} else { // octal constant
	230	if ( type < 5 ) { // not L128 ?
	231	sscanf( (char *)str.c_str(), "%llo", &v );
[cf5af9c]	232	#if defined(__SIZEOF_INT128__)
[f6582252]	233	} else { // octal int128 constant
	234	unsigned int len = str.length();
	235	if ( len > 1 + 43 \|\| (len == 1 + 43 && str[0] > '3') ) SemanticError( yylloc, "128-bit octal constant to large " + str );
[c5b55c4]	236	char buf[32];
[f6582252]	237	if ( len <= 1 + 21 ) { // value < 21 octal digitis
[c5b55c4]	238	sscanf( (char *)str.c_str(), "%llo", &v );
[f6582252]	239	} else {
	240	sscanf( &str[len - 21], "%llo", &v );
[791028a]	241	__int128 val = v; // accumulate bits
[f6582252]	242	str[len - 21] ='\0'; // shorten string
	243	sscanf( &str[len == 43 ? 1 : 0], "%llo", &v );
	244	val \|= (__int128)v << 63; // store bits
	245	if ( len == 1 + 43 ) { // most significant 2 bits ?
	246	str[2] = '\0'; // shorten string
	247	sscanf( &str[1], "%llo", &v ); // process most significant 2 bits
	248	val \|= (__int128)v << 126; // store bits
	249	} // if
	250	v = val >> 64; v2 = (uint64_t)val; // replace octal constant with 2 hex constants
	251	sprintf( buf, "%#llx", v2 );
	252	str2 = buf;
	253	} // if
[c5b55c4]	254	sprintf( buf, "%#llx", v );
	255	str = buf;
[cf5af9c]	256	#endif // __SIZEOF_INT128__
[f6582252]	257	} // if
	258	//printf( "%#llo %llu\n", v, v );
	259	} // if
	260	} else { // decimal constant ?
	261	if ( type < 5 ) { // not L128 ?
	262	sscanf( (char *)str.c_str(), "%llu", &v );
[cf5af9c]	263	#if defined(__SIZEOF_INT128__)
[f6582252]	264	} else { // decimal int128 constant
	265	#define P10_UINT64 10'000'000'000'000'000'000ULL // 19 zeroes
	266	unsigned int len = str.length();
	267	if ( str.length() == 39 && str > (Unsigned ? "340282366920938463463374607431768211455" : "170141183460469231731687303715884105727") )
	268	SemanticError( yylloc, "128-bit decimal constant to large " + str );
[c5b55c4]	269	char buf[32];
[f6582252]	270	if ( len <= 19 ) { // value < 19 decimal digitis
[c5b55c4]	271	sscanf( (char *)str.c_str(), "%llu", &v );
[f6582252]	272	} else {
	273	sscanf( &str[len - 19], "%llu", &v );
[791028a]	274	__int128 val = v; // accumulate bits
[f6582252]	275	str[len - 19] ='\0'; // shorten string
	276	sscanf( &str[len == 39 ? 1 : 0], "%llu", &v );
	277	val += (__int128)v * (__int128)P10_UINT64; // store bits
	278	if ( len == 39 ) { // most significant 2 bits ?
	279	str[1] = '\0'; // shorten string
	280	sscanf( &str[0], "%llu", &v ); // process most significant 2 bits
	281	val += (__int128)v * (__int128)P10_UINT64 * (__int128)P10_UINT64; // store bits
	282	} // if
	283	v = val >> 64; v2 = (uint64_t)val; // replace decimal constant with 2 hex constants
	284	sprintf( buf, "%#llx", v2 );
	285	str2 = buf;
	286	} // if
[c5b55c4]	287	sprintf( buf, "%#llx", v );
	288	str = buf;
[cf5af9c]	289	#endif // __SIZEOF_INT128__
[f6582252]	290	} // if
	291	//printf( "%llu\n", v );
	292	} // if
	293
	294	if ( type == -1 ) { // no suffix => determine type from value size
	295	valueToType( v, dec, type, Unsigned );
	296	} // if
	297	/* printf( "%s %llo %s %llo\n", str.c_str(), v, str2.c_str(), v2 ); */
	298
[0a616e0]	299	//if ( !( 0 <= type && type <= 6 ) ) { printf( "%s %lu %d %s\n", fred.c_str(), fred.length(), type, str.c_str() ); }
	300	assert( 0 <= type && type <= 6 );
[f56c32e]	301
[a6c5d7c]	302	// Constant type is correct for overload resolving.
[bb7422a]	303	ret = new ast::ConstantExpr( location,
	304	new ast::BasicType( kind[Unsigned][type] ), str, v );
[ba01b14]	305	if ( Unsigned && type < 2 ) { // hh or h, less than int ?
[201aeb9]	306	// int i = -1uh => 65535 not -1, so cast is necessary for unsigned, which unfortunately eliminates warnings for large values.
[bb7422a]	307	ret = new ast::CastExpr( location,
	308	ret,
	309	new ast::BasicType( kind[Unsigned][type] ),
	310	ast::ExplicitCast );
[ba01b14]	311	} else if ( ltype != -1 ) { // explicit length ?
[0a616e0]	312	if ( ltype == 6 ) { // int128, (int128)constant
[bb7422a]	313	ret2 = new ast::ConstantExpr( location,
	314	new ast::BasicType( ast::BasicType::LongLongSignedInt ),
	315	str2,
	316	v2 );
	317	ret = build_compoundLiteral( location,
	318	DeclarationNode::newBasicType(
	319	DeclarationNode::Int128
	320	)->addType(
	321	DeclarationNode::newSignedNess( DeclarationNode::Unsigned ) ),
	322	new InitializerNode(
	323	(InitializerNode *)(new InitializerNode( new ExpressionNode( v2 == 0 ? ret2 : ret ) ))->set_last( new InitializerNode( new ExpressionNode( v2 == 0 ? ret : ret2 ) ) ), true )
	324	);
[0a616e0]	325	} else { // explicit length, (length_type)constant
[bb7422a]	326	ret = new ast::CastExpr( location,
	327	ret,
	328	new ast::TypeInstType( lnthsInt[Unsigned][ltype], ast::TypeDecl::Dtype ),
	329	ast::ExplicitCast );
[3d8d7a7]	330	if ( ltype == 5 ) { // pointer, intptr( (uintptr_t)constant )
[bb7422a]	331	ret = build_func( location,
	332	new ExpressionNode(
	333	build_varref( location, new string( "intptr" ) ) ),
	334	new ExpressionNode( ret ) );
[0a616e0]	335	} // if
[201aeb9]	336	} // if
[7b1d5ec]	337	} // if
[e8ccca3]	338
[f56c32e]	339	CLEANUP: ;
[ab57786]	340	delete &str; // created by lex
	341	return ret;
[7bf7fb9]	342	} // build_constantInteger
[51b73452]	343
[201aeb9]	344
[ba01b14]	345	static inline void checkFnxFloat( string & str, size_t last, bool & explnth, int & type ) {
	346	string::size_type posn;
	347	// floating-point constant has minimum of 2 characters, 1. or .1, so safe to look ahead
	348	if ( str[1] == 'x' ) { // hex ?
	349	posn = str.find_last_of( "pP" ); // back for exponent (must have)
	350	posn = str.find_first_of( "fF", posn + 1 ); // forward for size (fF allowed in hex constant)
	351	} else {
	352	posn = str.find_last_of( "fF" ); // back for size (fF not allowed)
	353	} // if
[201aeb9]	354	if ( posn == string::npos ) return;
[ba01b14]	355	explnth = true;
[201aeb9]	356	posn += 1; // advance to size
	357	if ( str[posn] == '3' ) { // 32
[ba01b14]	358	if ( str[last] != 'x' ) type = 6;
	359	else type = 7;
[201aeb9]	360	} else if ( str[posn] == '6' ) { // 64
[ba01b14]	361	if ( str[last] != 'x' ) type = 8;
	362	else type = 9;
	363	} else if ( str[posn] == '8' ) { // 80
	364	type = 3;
	365	} else if ( str[posn] == '1' ) { // 16/128
	366	if ( str[posn + 1] == '6' ) { // 16
	367	type = 5;
	368	} else { // 128
	369	if ( str[last] != 'x' ) type = 10;
	370	else type = 11;
	371	} // if
[201aeb9]	372	} else {
	373	assertf( false, "internal error, bad floating point length %s", str.c_str() );
	374	} // if
[ba01b14]	375	} // checkFnxFloat
[201aeb9]	376
	377
[bb7422a]	378	ast::Expr * build_constantFloat(
	379	const CodeLocation & location, string & str ) {
	380	static const ast::BasicType::Kind kind[2][12] = {
	381	{ 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 },
	382	{ 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 },
[7bf7fb9]	383	};
[59c24b6]	384
[ba01b14]	385	// floating-point constant has minimum of 2 characters 1. or .1
[7bf7fb9]	386	size_t last = str.length() - 1;
[d56e5bc]	387	double v;
[ba01b14]	388	int type; // 0 => float, 1 => double, 3 => long double, ...
	389	bool complx = false; // real, complex
	390	bool explnth = false; // explicit literal length
[d56e5bc]	391
	392	sscanf( str.c_str(), "%lg", &v );
[51b73452]	393
[7bf7fb9]	394	if ( checkI( str[last] ) ) { // imaginary ?
	395	complx = true;
	396	last -= 1; // backup one character
	397	} // if
[0caaa6a]	398
[7bf7fb9]	399	if ( checkF( str[last] ) ) { // float ?
[ba01b14]	400	type = 0;
[7bf7fb9]	401	} else if ( checkD( str[last] ) ) { // double ?
[ba01b14]	402	type = 1;
[7bf7fb9]	403	} else if ( checkL( str[last] ) ) { // long double ?
[ba01b14]	404	type = 2;
	405	} else if ( checkF80( str[last] ) ) { // __float80 ?
	406	type = 3;
	407	} else if ( checkF128( str[last] ) ) { // __float128 ?
	408	type = 4;
[201aeb9]	409	} else {
[ba01b14]	410	type = 1; // double (default if no suffix)
	411	checkFnxFloat( str, last, explnth, type );
[7bf7fb9]	412	} // if
[ba01b14]	413
[7bf7fb9]	414	if ( ! complx && checkI( str[last - 1] ) ) { // imaginary ?
	415	complx = true;
	416	} // if
[51b73452]	417
[ba01b14]	418	assert( 0 <= type && type < 12 );
[bb7422a]	419	ast::Expr * ret = new ast::ConstantExpr( location,
	420	new ast::BasicType( kind[complx][type] ),
	421	str,
	422	v );
	423	// explicit length ?
	424	if ( explnth ) {
	425	ret = new ast::CastExpr( location,
	426	ret,
	427	new ast::BasicType( kind[complx][type] ),
	428	ast::ExplicitCast );
[201aeb9]	429	} // if
[76c62b2]	430
[ab57786]	431	delete &str; // created by lex
	432	return ret;
[7bf7fb9]	433	} // build_constantFloat
[51b73452]	434
[76c62b2]	435	static void sepString( string & str, string & units, char delimit ) {
	436	string::size_type posn = str.find_last_of( delimit ) + 1;
	437	if ( posn != str.length() ) {
[e8ccca3]	438	units = "?" + str.substr( posn ); // extract units
[76c62b2]	439	str.erase( posn ); // remove units
	440	} // if
	441	} // sepString
	442
[bb7422a]	443	ast::Expr * build_constantChar( const CodeLocation & location, string & str ) {
[76c62b2]	444	string units; // units
	445	sepString( str, units, '\'' ); // separate constant from units
	446
[bb7422a]	447	ast::Expr * ret = new ast::ConstantExpr( location,
	448	new ast::BasicType( ast::BasicType::Char ),
	449	str,
	450	(unsigned long long int)(unsigned char)str[1] );
[e8ccca3]	451	if ( units.length() != 0 ) {
[bb7422a]	452	ret = new ast::UntypedExpr( location,
	453	new ast::NameExpr( location, units ),
	454	{ ret } );
[e8ccca3]	455	} // if
[76c62b2]	456
[ab57786]	457	delete &str; // created by lex
	458	return ret;
[7bf7fb9]	459	} // build_constantChar
[51b73452]	460
[bb7422a]	461	ast::Expr * build_constantStr(
	462	const CodeLocation & location,
	463	string & str ) {
[6e3eaa57]	464	assert( str.length() > 0 );
[76c62b2]	465	string units; // units
	466	sepString( str, units, '"' ); // separate constant from units
	467
[bb7422a]	468	ast::Type * strtype;
[513e165]	469	switch ( str[0] ) { // str has >= 2 characters, i.e, null string "" => safe to look at subscripts 0/1
[0d0931d]	470	case 'u':
[513e165]	471	if ( str[1] == '8' ) goto Default; // utf-8 characters => array of char
	472	// lookup type of associated typedef
[bb7422a]	473	strtype = new ast::TypeInstType( "char16_t", ast::TypeDecl::Dtype );
[e612146c]	474	break;
[0d0931d]	475	case 'U':
[bb7422a]	476	strtype = new ast::TypeInstType( "char32_t", ast::TypeDecl::Dtype );
[e612146c]	477	break;
[0d0931d]	478	case 'L':
[bb7422a]	479	strtype = new ast::TypeInstType( "wchar_t", ast::TypeDecl::Dtype );
[e612146c]	480	break;
[0d0931d]	481	Default: // char default string type
	482	default:
[bb7422a]	483	strtype = new ast::BasicType( ast::BasicType::Char );
[e612146c]	484	} // switch
[bb7422a]	485	ast::ArrayType * at = new ast::ArrayType(
	486	strtype,
	487	// Length is adjusted: +1 for '\0' and -2 for '"'
	488	ast::ConstantExpr::from_ulong( location, str.size() + 1 - 2 ),
	489	ast::FixedLen,
	490	ast::DynamicDim );
	491	ast::Expr * ret = new ast::ConstantExpr( location, at, str, std::nullopt );
[e612146c]	492	if ( units.length() != 0 ) {
[bb7422a]	493	ret = new ast::UntypedExpr( location,
	494	new ast::NameExpr( location, units ),
	495	{ ret } );
[e612146c]	496	} // if
[5809461]	497
[ab57786]	498	delete &str; // created by lex
	499	return ret;
[7bf7fb9]	500	} // build_constantStr
[51b73452]	501
[bb7422a]	502	ast::Expr * build_field_name_FLOATING_FRACTIONconstant(
	503	const CodeLocation & location, const string & str ) {
[a16764a6]	504	if ( str.find_first_not_of( "0123456789", 1 ) != string::npos ) SemanticError( yylloc, "invalid tuple index " + str );
[bb7422a]	505	ast::Expr * ret = build_constantInteger( location,
	506	*new string( str.substr(1) ) );
[930f69e]	507	delete &str;
	508	return ret;
	509	} // build_field_name_FLOATING_FRACTIONconstant
	510
[bb7422a]	511	ast::Expr * build_field_name_FLOATING_DECIMALconstant(
	512	const CodeLocation & location, const string & str ) {
[3c67255]	513	if ( str[str.size() - 1] != '.' ) SemanticError( yylloc, "invalid tuple index " + str );
[bb7422a]	514	ast::Expr * ret = build_constantInteger(
	515	location, *new string( str.substr( 0, str.size()-1 ) ) );
[930f69e]	516	delete &str;
	517	return ret;
	518	} // build_field_name_FLOATING_DECIMALconstant
	519
[bb7422a]	520	ast::Expr * build_field_name_FLOATINGconstant( const CodeLocation & location,
	521	const string & str ) {
[8780e30]	522	// str is of the form A.B -> separate at the . and return member expression
	523	int a, b;
	524	char dot;
[f43df73]	525	stringstream ss( str );
[8780e30]	526	ss >> a >> dot >> b;
[bb7422a]	527	auto ret = new ast::UntypedMemberExpr( location,
	528	ast::ConstantExpr::from_int( location, b ),
	529	ast::ConstantExpr::from_int( location, a )
	530	);
[8780e30]	531	delete &str;
	532	return ret;
	533	} // build_field_name_FLOATINGconstant
	534
[bb7422a]	535	ast::Expr * make_field_name_fraction_constants( const CodeLocation & location,
	536	ast::Expr * fieldName,
	537	ast::Expr * fracts ) {
	538	if ( nullptr == fracts ) {
	539	return fieldName;
	540	} else if ( auto memberExpr = dynamic_cast<ast::UntypedMemberExpr *>( fracts ) ) {
	541	memberExpr->member = make_field_name_fraction_constants( location,
	542	fieldName,
	543	ast::mutate( memberExpr->aggregate.get() ) );
	544	return memberExpr;
	545	} else {
	546	return new ast::UntypedMemberExpr( location, fracts, fieldName );
[f43df73]	547	} // if
[8780e30]	548	} // make_field_name_fraction_constants
	549
[bb7422a]	550	ast::Expr * build_field_name_fraction_constants( const CodeLocation & location,
	551	ast::Expr * fieldName,
	552	ExpressionNode * fracts ) {
	553	return make_field_name_fraction_constants( location, fieldName, maybeMoveBuild( fracts ) );
[8780e30]	554	} // build_field_name_fraction_constants
	555
[bb7422a]	556	ast::NameExpr * build_varref( const CodeLocation & location,
	557	const string * name ) {
	558	ast::NameExpr * expr = new ast::NameExpr( location, *name );
[7ecbb7e]	559	delete name;
	560	return expr;
[a2e0687]	561	} // build_varref
[51b1202]	562
[bb7422a]	563	ast::QualifiedNameExpr * build_qualified_expr( const CodeLocation & location,
	564	const DeclarationNode * decl_node,
	565	const ast::NameExpr * name ) {
	566	ast::Decl * newDecl = maybeBuild( decl_node );
	567	if ( ast::DeclWithType * newDeclWithType = dynamic_cast<ast::DeclWithType *>( newDecl ) ) {
	568	if ( const ast::Type * t = newDeclWithType->get_type() ) {
	569	if ( auto typeInst = dynamic_cast<const ast::TypeInstType *>( t ) ) {
	570	newDecl = new ast::EnumDecl( location, typeInst->name );
[b0d9ff7]	571	}
	572	}
	573	}
[bb7422a]	574	return new ast::QualifiedNameExpr( location, newDecl, name->name );
[b0d9ff7]	575	}
	576
[bb7422a]	577	ast::QualifiedNameExpr * build_qualified_expr( const CodeLocation & location,
	578	const ast::EnumDecl * decl,
	579	const ast::NameExpr * name ) {
	580	return new ast::QualifiedNameExpr( location, decl, name->name );
[4e2befe3]	581	}
	582
[bb7422a]	583	ast::DimensionExpr * build_dimensionref( const CodeLocation & location,
	584	const string * name ) {
	585	ast::DimensionExpr * expr = new ast::DimensionExpr( location, *name );
[6e50a6b]	586	delete name;
	587	return expr;
	588	} // build_varref
[ea54f1e]	589
[5809461]	590	// TODO: get rid of this and OperKinds and reuse code from OperatorTable
[a2e0687]	591	static const char * OperName[] = { // must harmonize with OperKinds
[5721a6d]	592	// diadic
[e5f2a67]	593	"SizeOf", "AlignOf", "OffsetOf", "?+?", "?-?", "?\\?", "?*?", "?/?", "?%?", "\|\|", "&&",
[5721a6d]	594	"?\|?", "?&?", "?^?", "Cast", "?<<?", "?>>?", "?<?", "?>?", "?<=?", "?>=?", "?==?", "?!=?",
[e5f2a67]	595	"?=?", "?@=?", "?\\=?", "?*=?", "?/=?", "?%=?", "?+=?", "?-=?", "?<<=?", "?>>=?", "?&=?", "?^=?", "?\|=?",
[d9e2280]	596	"?[?]", "...",
[5721a6d]	597	// monadic
[5809461]	598	"+?", "-?", "AddressOf", "*?", "!?", "~?", "++?", "?++", "--?", "?--",
[a2e0687]	599	}; // OperName
[5721a6d]	600
[bb7422a]	601	ast::Expr * build_cast( const CodeLocation & location,
	602	DeclarationNode * decl_node,
	603	ExpressionNode * expr_node ) {
	604	ast::Type * targetType = maybeMoveBuildType( decl_node );
	605	if ( dynamic_cast<ast::VoidType *>( targetType ) ) {
[064e3ff]	606	delete targetType;
[bb7422a]	607	return new ast::CastExpr( location,
	608	maybeMoveBuild( expr_node ),
	609	ast::ExplicitCast );
[064e3ff]	610	} else {
[bb7422a]	611	return new ast::CastExpr( location,
	612	maybeMoveBuild( expr_node ),
	613	targetType,
	614	ast::ExplicitCast );
[064e3ff]	615	} // if
[a2e0687]	616	} // build_cast
[a5f0529]	617
[bb7422a]	618	ast::Expr * build_keyword_cast( const CodeLocation & location,
	619	ast::AggregateDecl::Aggregate target,
	620	ExpressionNode * expr_node ) {
	621	return new ast::KeywordCastExpr( location,
	622	maybeMoveBuild( expr_node ),
	623	target
	624	);
[9a705dc8]	625	}
	626
[bb7422a]	627	ast::Expr * build_virtual_cast( const CodeLocation & location,
	628	DeclarationNode * decl_node,
	629	ExpressionNode * expr_node ) {
	630	return new ast::VirtualCastExpr( location,
	631	maybeMoveBuild( expr_node ),
	632	maybeMoveBuildType( decl_node )
	633	);
[a2e0687]	634	} // build_virtual_cast
[064e3ff]	635
[bb7422a]	636	ast::Expr * build_fieldSel( const CodeLocation & location,
	637	ExpressionNode * expr_node,
	638	ast::Expr * member ) {
	639	return new ast::UntypedMemberExpr( location,
	640	member,
	641	maybeMoveBuild( expr_node )
	642	);
[a2e0687]	643	} // build_fieldSel
[064e3ff]	644
[bb7422a]	645	ast::Expr * build_pfieldSel( const CodeLocation & location,
	646	ExpressionNode * expr_node,
	647	ast::Expr * member ) {
	648	auto deref = new ast::UntypedExpr( location,
	649	new ast::NameExpr( location, "*?" )
	650	);
[64ac636]	651	deref->location = expr_node->location;
[bb7422a]	652	deref->args.push_back( maybeMoveBuild( expr_node ) );
	653	auto ret = new ast::UntypedMemberExpr( location, member, deref );
[064e3ff]	654	return ret;
[a2e0687]	655	} // build_pfieldSel
[064e3ff]	656
[bb7422a]	657	ast::Expr * build_offsetOf( const CodeLocation & location,
	658	DeclarationNode * decl_node,
	659	ast::NameExpr * member ) {
	660	ast::Expr * ret = new ast::UntypedOffsetofExpr( location,
	661	maybeMoveBuildType( decl_node ),
	662	member->name
	663	);
	664	ret->result = new ast::BasicType( ast::BasicType::LongUnsignedInt );
[ac71a86]	665	delete member;
	666	return ret;
[a2e0687]	667	} // build_offsetOf
[064e3ff]	668
[bb7422a]	669	ast::Expr * build_and_or( const CodeLocation & location,
	670	ExpressionNode * expr_node1,
	671	ExpressionNode * expr_node2,
	672	ast::LogicalFlag flag ) {
	673	return new ast::LogicalExpr( location,
	674	notZeroExpr( maybeMoveBuild( expr_node1 ) ),
	675	notZeroExpr( maybeMoveBuild( expr_node2 ) ),
	676	flag
	677	);
[a2e0687]	678	} // build_and_or
[51e076e]	679
[bb7422a]	680	ast::Expr * build_unary_val( const CodeLocation & location,
	681	OperKinds op,
	682	ExpressionNode * expr_node ) {
	683	std::vector<ast::ptr<ast::Expr>> args;
[702e826]	684	args.push_back( maybeMoveBuild( expr_node ) );
[bb7422a]	685	return new ast::UntypedExpr( location,
	686	new ast::NameExpr( location, OperName[ (int)op ] ),
	687	std::move( args )
	688	);
[a2e0687]	689	} // build_unary_val
	690
[bb7422a]	691	ast::Expr * build_binary_val( const CodeLocation & location,
	692	OperKinds op,
	693	ExpressionNode * expr_node1,
	694	ExpressionNode * expr_node2 ) {
	695	std::vector<ast::ptr<ast::Expr>> args;
[702e826]	696	args.push_back( maybeMoveBuild( expr_node1 ) );
	697	args.push_back( maybeMoveBuild( expr_node2 ) );
[bb7422a]	698	return new ast::UntypedExpr( location,
	699	new ast::NameExpr( location, OperName[ (int)op ] ),
	700	std::move( args )
	701	);
[a2e0687]	702	} // build_binary_val
	703
[bb7422a]	704	ast::Expr * build_cond( const CodeLocation & location,
	705	ExpressionNode * expr_node1,
	706	ExpressionNode * expr_node2,
	707	ExpressionNode * expr_node3 ) {
	708	return new ast::ConditionalExpr( location,
	709	notZeroExpr( maybeMoveBuild( expr_node1 ) ),
	710	maybeMoveBuild( expr_node2 ),
	711	maybeMoveBuild( expr_node3 )
	712	);
[a2e0687]	713	} // build_cond
[51e076e]	714
[bb7422a]	715	ast::Expr * build_tuple( const CodeLocation & location,
	716	ExpressionNode * expr_node ) {
	717	std::vector<ast::ptr<ast::Expr>> exprs;
[907eccb]	718	buildMoveList( expr_node, exprs );
[bb7422a]	719	return new ast::UntypedTupleExpr( location, std::move( exprs ) );
[a2e0687]	720	} // build_tuple
[9706554]	721
[bb7422a]	722	ast::Expr * build_func( const CodeLocation & location,
	723	ExpressionNode * function,
	724	ExpressionNode * expr_node ) {
	725	std::vector<ast::ptr<ast::Expr>> args;
[7ecbb7e]	726	buildMoveList( expr_node, args );
[bb7422a]	727	return new ast::UntypedExpr( location,
	728	maybeMoveBuild( function ),
	729	std::move( args )
	730	);
[a2e0687]	731	} // build_func
[9706554]	732
[bb7422a]	733	ast::Expr * build_compoundLiteral( const CodeLocation & location,
	734	DeclarationNode * decl_node,
	735	InitializerNode * kids ) {
	736	// compound literal type
	737	ast::Decl * newDecl = maybeBuild( decl_node );
	738	// non-sue compound-literal type
	739	if ( ast::DeclWithType * newDeclWithType = dynamic_cast<ast::DeclWithType *>( newDecl ) ) {
	740	return new ast::CompoundLiteralExpr( location,
	741	newDeclWithType->get_type(),
	742	maybeMoveBuild( kids ) );
[630a82a]	743	// these types do not have associated type information
[bb7422a]	744	} else if ( auto newDeclStructDecl = dynamic_cast<ast::StructDecl *>( newDecl ) ) {
	745	if ( newDeclStructDecl->body ) {
	746	return new ast::CompoundLiteralExpr( location,
	747	new ast::StructInstType( newDeclStructDecl ),
	748	maybeMoveBuild( kids ) );
[fbcde64]	749	} else {
[bb7422a]	750	return new ast::CompoundLiteralExpr( location,
	751	new ast::StructInstType( newDeclStructDecl->name ),
	752	maybeMoveBuild( kids ) );
[fbcde64]	753	} // if
[bb7422a]	754	} else if ( auto newDeclUnionDecl = dynamic_cast<ast::UnionDecl *>( newDecl ) ) {
	755	if ( newDeclUnionDecl->body ) {
	756	return new ast::CompoundLiteralExpr( location,
	757	new ast::UnionInstType( newDeclUnionDecl ),
	758	maybeMoveBuild( kids ) );
[fbcde64]	759	} else {
[bb7422a]	760	return new ast::CompoundLiteralExpr( location,
	761	new ast::UnionInstType( newDeclUnionDecl->name ),
	762	maybeMoveBuild( kids ) );
[fbcde64]	763	} // if
[bb7422a]	764	} else if ( auto newDeclEnumDecl = dynamic_cast<ast::EnumDecl *>( newDecl ) ) {
	765	if ( newDeclEnumDecl->body ) {
	766	return new ast::CompoundLiteralExpr( location,
	767	new ast::EnumInstType( newDeclEnumDecl ),
	768	maybeMoveBuild( kids ) );
[fbcde64]	769	} else {
[bb7422a]	770	return new ast::CompoundLiteralExpr( location,
	771	new ast::EnumInstType( newDeclEnumDecl->name ),
	772	maybeMoveBuild( kids ) );
[fbcde64]	773	} // if
[630a82a]	774	} else {
	775	assert( false );
	776	} // if
[a2e0687]	777	} // build_compoundLiteral
[630a82a]	778
[b87a5ed]	779	// Local Variables: //
	780	// tab-width: 4 //
	781	// End: //

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