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source: src/Parser/ExpressionNode.cpp @ 5f210c0

Last change on this file since 5f210c0 was 5a2b0b7, checked in by Andrew Beach <ajbeach@…>, 5 months ago
Reverted the change to the compiler. The other changes are both practically and theoretically correct.
Property mode set to `100644`
File size: 28.8 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	//
[c92bdcc]	7	// ExpressionNode.cpp --
[0caaa6a]	8	//
[f43df73]	9	// Author : Peter A. Buhr
[b87a5ed]	10	// Created On : Sat May 16 13:17:07 2015
[ca9d65e]	11	// Last Modified By : Peter A. Buhr
	12	// Last Modified On : Thu Dec 14 18:57:07 2023
	13	// Update Count : 1087
[0caaa6a]	14	//
[b87a5ed]	15
[c92bdcc]	16	#include "ExpressionNode.hpp"
[c468150]	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==
[51b7345]	24
[7a780ad]	25	#include "AST/BasicKind.hpp" // for BasicKind
[bb7422a]	26	#include "AST/Expr.hpp" // for NameExpr
[7a780ad]	27	#include "AST/Type.hpp" // for Type, LengthFlag, DimentionFlag
[c92bdcc]	28	#include "Common/SemanticError.hpp"// for SemanticError
	29	#include "Common/Utility.hpp" // for maybeMoveBuild, maybeBuild, CodeLo...
	30	#include "DeclarationNode.hpp" // for DeclarationNode
	31	#include "InitializerNode.hpp" // for InitializerNode
	32	#include "TypeData.hpp" // for addType, build_basic_type, build_c...
	33	#include "ParserUtility.hpp" // for notZeroExpr
[d180746]	34
[51b7345]	35	using namespace std;
	36
[cd623a4]	37	//##############################################################################
	38
[7bf7fb9]	39	// Difficult to separate extra parts of constants during lexing because actions are not allow in the middle of patterns:
	40	//
	41	// prefix action constant action suffix
	42	//
	43	// Alternatively, breaking a pattern using BEGIN does not work if the following pattern can be empty:
	44	//
	45	// constant BEGIN CONT ...
	46	// <CONT>(...)? BEGIN 0 ... // possible empty suffix
	47	//
	48	// because the CONT rule is NOT triggered if the pattern is empty. Hence, constants are reparsed here to determine their
	49	// type.
	50
[ba01b14]	51	// static inline bool checkH( char c ) { return c == 'h' \|\| c == 'H'; }
	52	// static inline bool checkZ( char c ) { return c == 'z' \|\| c == 'Z'; }
	53	// static inline bool checkU( char c ) { return c == 'u' \|\| c == 'U'; }
[7bf7fb9]	54	static inline bool checkF( char c ) { return c == 'f' \|\| c == 'F'; }
	55	static inline bool checkD( char c ) { return c == 'd' \|\| c == 'D'; }
[ba01b14]	56	static inline bool checkF80( char c ) { return c == 'w' \|\| c == 'W'; }
	57	static inline bool checkF128( char c ) { return c == 'q' \|\| c == 'Q'; }
[f56c32e]	58	static inline bool checkL( char c ) { return c == 'l' \|\| c == 'L'; }
[7bf7fb9]	59	static inline bool checkI( char c ) { return c == 'i' \|\| c == 'I'; }
[0a2168f]	60	static inline bool checkB( char c ) { return c == 'b' \|\| c == 'B'; }
[7bf7fb9]	61	static inline bool checkX( char c ) { return c == 'x' \|\| c == 'X'; }
[3d8d7a7]	62	// static inline bool checkN( char c ) { return c == 'n' \|\| c == 'N'; }
[f56c32e]	63
	64	void lnthSuffix( string & str, int & type, int & ltype ) {
[c5b55c4]	65	// 'u' can appear before or after length suffix
[f56c32e]	66	string::size_type posn = str.find_last_of( "lL" );
[0a616e0]	67
	68	if ( posn == string::npos ) return; // no suffix
[c5b55c4]	69	size_t end = str.length() - 1;
	70	if ( posn == end ) { type = 3; return; } // no length after 'l' => long
[702e826]	71
[0a616e0]	72	string::size_type next = posn + 1; // advance to length
	73	if ( str[next] == '3' ) { // 32
	74	type = ltype = 2;
	75	} else if ( str[next] == '6' ) { // 64
	76	type = ltype = 3;
	77	} else if ( str[next] == '8' ) { // 8
	78	type = ltype = 1;
	79	} else if ( str[next] == '1' ) {
	80	if ( str[next + 1] == '6' ) { // 16
	81	type = ltype = 0;
	82	} else { // 128
	83	type = 5; ltype = 6;
[f56c32e]	84	} // if
	85	} // if
[c5b55c4]	86
	87	char fix = '\0';
	88	if ( str[end] == 'u' \|\| str[end] == 'U' ) fix = str[end]; // ends with 'uU' ?
	89	str.erase( posn ); // remove length suffix and possibly uU
	90	if ( type == 5 ) { // L128 does not need uU
	91	end = str.length() - 1;
	92	if ( str[end] == 'u' \|\| str[end] == 'U' ) str.erase( end ); // ends with 'uU' ? remove
	93	} else if ( fix != '\0' ) str += fix; // put 'uU' back if removed
[f56c32e]	94	} // lnthSuffix
[7bf7fb9]	95
[0a616e0]	96	void valueToType( unsigned long long int & v, bool dec, int & type, bool & Unsigned ) {
	97	// use value to determine type
	98	if ( v <= INT_MAX ) { // signed int
	99	type = 2;
	100	} else if ( v <= UINT_MAX && ! dec ) { // unsigned int
	101	type = 2;
	102	Unsigned = true; // unsigned
	103	} else if ( v <= LONG_MAX ) { // signed long int
	104	type = 3;
	105	} else if ( v <= ULONG_MAX && ( ! dec \|\| LONG_MAX == LLONG_MAX ) ) { // signed long int
	106	type = 3;
	107	Unsigned = true; // unsigned long int
	108	} else if ( v <= LLONG_MAX ) { // signed long long int
	109	type = 4;
	110	} else { // unsigned long long int
	111	type = 4;
	112	Unsigned = true; // unsigned long long int
	113	} // if
	114	} // valueToType
	115
[f6582252]	116	static void scanbin( string & str, unsigned long long int & v ) {
	117	v = 0;
	118	size_t last = str.length() - 1; // last subscript of constant
	119	for ( unsigned int i = 2;; ) { // ignore prefix
	120	if ( str[i] == '1' ) v \|= 1;
	121	i += 1;
[0d0931d]	122	if ( i == last - 1 \|\| (str[i] != '0' && str[i] != '1') ) break;
[f6582252]	123	v <<= 1;
	124	} // for
	125	} // scanbin
	126
[bb7422a]	127	ast::Expr * build_constantInteger(
	128	const CodeLocation & location, string & str ) {
[7a780ad]	129	static const ast::BasicKind kind[2][6] = {
[ba01b14]	130	// short (h) must be before char (hh) because shorter type has the longer suffix
[7a780ad]	131	{ ast::BasicKind::ShortSignedInt, ast::BasicKind::SignedChar, ast::BasicKind::SignedInt, ast::BasicKind::LongSignedInt, ast::BasicKind::LongLongSignedInt, /* BasicKind::SignedInt128 */ ast::BasicKind::LongLongSignedInt, },
	132	{ ast::BasicKind::ShortUnsignedInt, ast::BasicKind::UnsignedChar, ast::BasicKind::UnsignedInt, ast::BasicKind::LongUnsignedInt, ast::BasicKind::LongLongUnsignedInt, /* BasicKind::UnsignedInt128 */ ast::BasicKind::LongLongUnsignedInt, },
[7bf7fb9]	133	};
[76c62b2]	134
[0a616e0]	135	static const char * lnthsInt[2][6] = {
	136	{ "int16_t", "int8_t", "int32_t", "int64_t", "size_t", "uintptr_t", },
	137	{ "uint16_t", "uint8_t", "uint32_t", "uint64_t", "size_t", "uintptr_t", },
[ba01b14]	138	}; // lnthsInt
	139
[f6582252]	140	string str2( "0x0" );
	141	unsigned long long int v, v2 = 0; // converted integral value
[bb7422a]	142	ast::Expr * ret, * ret2;
[0a616e0]	143
	144	int type = -1; // 0 => short, 1 => char, 2 => int, 3 => long int, 4 => long long int, 5 => int128
	145	int ltype = -1; // 0 => 16 bits, 1 => 8 bits, 2 => 32 bits, 3 => 64 bits, 4 => size_t, 5 => intptr, 6 => pointer
	146	bool dec = true, Unsigned = false; // decimal, unsigned constant
[7bf7fb9]	147
[6165ce7]	148	// special constants
	149	if ( str == "0" ) {
[bb7422a]	150	ret = new ast::ConstantExpr( location, new ast::ZeroType(), str, 0 );
[6165ce7]	151	goto CLEANUP;
	152	} // if
	153	if ( str == "1" ) {
[bb7422a]	154	ret = new ast::ConstantExpr( location, new ast::OneType(), str, 1 );
[6165ce7]	155	goto CLEANUP;
	156	} // if
[ea6332d]	157
[f6582252]	158	// 'u' can appear before or after length suffix
	159	if ( str.find_last_of( "uU" ) != string::npos ) Unsigned = true;
	160
	161	if ( isdigit( str[str.length() - 1] ) ) { // no suffix ?
[f56c32e]	162	lnthSuffix( str, type, ltype ); // could have length suffix
	163	} else {
	164	// At least one digit in integer constant, so safe to backup while looking for suffix.
[52a2248]	165	// This declaration and the comma expressions in the conditions mimic
	166	// the declare and check pattern allowed in later compiler versions.
	167	// (Only some early compilers/C++ standards do not support it.)
[15596d7]	168	string::size_type posn;
	169	// pointer value
[52a2248]	170	if ( posn = str.find_last_of( "pP" ), posn != string::npos ) {
[15596d7]	171	ltype = 5; str.erase( posn, 1 );
[0d0931d]	172	// size_t
[52a2248]	173	} else if ( posn = str.find_last_of( "zZ" ), posn != string::npos ) {
[15596d7]	174	Unsigned = true; type = 2; ltype = 4; str.erase( posn, 1 );
[0d0931d]	175	// signed char
[52a2248]	176	} else if ( posn = str.rfind( "hh" ), posn != string::npos ) {
[15596d7]	177	type = 1; str.erase( posn, 2 );
[0d0931d]	178	// signed char
[52a2248]	179	} else if ( posn = str.rfind( "HH" ), posn != string::npos ) {
[15596d7]	180	type = 1; str.erase( posn, 2 );
[0d0931d]	181	// short
[52a2248]	182	} else if ( posn = str.find_last_of( "hH" ), posn != string::npos ) {
[15596d7]	183	type = 0; str.erase( posn, 1 );
[0d0931d]	184	// int (natural number)
[52a2248]	185	} else if ( posn = str.find_last_of( "nN" ), posn != string::npos ) {
[15596d7]	186	type = 2; str.erase( posn, 1 );
	187	} else if ( str.rfind( "ll" ) != string::npos \|\| str.rfind( "LL" ) != string::npos ) {
	188	type = 4;
	189	} else {
	190	lnthSuffix( str, type, ltype );
	191	} // if
[7bf7fb9]	192	} // if
	193
[f6582252]	194	// Cannot be just "0"/"1"; sscanf stops at the suffix, if any; value goes over the wall => always generate
[dbe8e31c]	195
[cf5af9c]	196	#if ! defined(__SIZEOF_INT128__)
[ca9d65e]	197	if ( type == 5 ) SemanticError( yylloc, "int128 constant is not supported on this target \"%s\"", str.c_str() );
[cf5af9c]	198	#endif // ! __SIZEOF_INT128__
[702e826]	199
[f6582252]	200	if ( str[0] == '0' ) { // radix character ?
	201	dec = false;
	202	if ( checkX( str[1] ) ) { // hex constant ?
	203	if ( type < 5 ) { // not L128 ?
	204	sscanf( (char *)str.c_str(), "%llx", &v );
[c5b55c4]	205	#if defined(__SIZEOF_INT128__)
[f6582252]	206	} else { // hex int128 constant
	207	unsigned int len = str.length();
[ca9d65e]	208	if ( len > (2 + 16 + 16) ) SemanticError( yylloc, "128-bit hexadecimal constant to large \"%s\"", str.c_str() );
[702e826]	209	// hex digits < 2^64
	210	if ( len > (2 + 16) ) {
	211	str2 = "0x" + str.substr( len - 16 );
	212	sscanf( (char *)str2.c_str(), "%llx", &v2 );
	213	str = str.substr( 0, len - 16 );
[15596d7]	214	} // if
[f6582252]	215	sscanf( (char *)str.c_str(), "%llx", &v );
[c5b55c4]	216	#endif // __SIZEOF_INT128__
[f6582252]	217	} // if
	218	//printf( "%llx %llu\n", v, v );
	219	} else if ( checkB( str[1] ) ) { // binary constant ?
[c5b55c4]	220	#if defined(__SIZEOF_INT128__)
[013b028]	221	unsigned int len = str.length();
[f6582252]	222	if ( type == 5 && len > 2 + 64 ) {
[ca9d65e]	223	if ( len > 2 + 64 + 64 ) SemanticError( yylloc, "128-bit binary constant to large \"%s\".", str.c_str() );
[f6582252]	224	str2 = "0b" + str.substr( len - 64 );
	225	str = str.substr( 0, len - 64 );
	226	scanbin( str2, v2 );
	227	} // if
[c5b55c4]	228	#endif // __SIZEOF_INT128__
[f6582252]	229	scanbin( str, v );
	230	//printf( "%#llx %llu\n", v, v );
	231	} else { // octal constant
	232	if ( type < 5 ) { // not L128 ?
	233	sscanf( (char *)str.c_str(), "%llo", &v );
[cf5af9c]	234	#if defined(__SIZEOF_INT128__)
[f6582252]	235	} else { // octal int128 constant
	236	unsigned int len = str.length();
[ca9d65e]	237	if ( len > 1 + 43 \|\| (len == 1 + 43 && str[0] > '3') ) SemanticError( yylloc, "128-bit octal constant to large \"%s\"", str.c_str() );
[c5b55c4]	238	char buf[32];
[f6582252]	239	if ( len <= 1 + 21 ) { // value < 21 octal digitis
[c5b55c4]	240	sscanf( (char *)str.c_str(), "%llo", &v );
[f6582252]	241	} else {
	242	sscanf( &str[len - 21], "%llo", &v );
[791028a]	243	__int128 val = v; // accumulate bits
[f6582252]	244	str[len - 21] ='\0'; // shorten string
	245	sscanf( &str[len == 43 ? 1 : 0], "%llo", &v );
	246	val \|= (__int128)v << 63; // store bits
	247	if ( len == 1 + 43 ) { // most significant 2 bits ?
	248	str[2] = '\0'; // shorten string
	249	sscanf( &str[1], "%llo", &v ); // process most significant 2 bits
	250	val \|= (__int128)v << 126; // store bits
	251	} // if
	252	v = val >> 64; v2 = (uint64_t)val; // replace octal constant with 2 hex constants
	253	sprintf( buf, "%#llx", v2 );
	254	str2 = buf;
	255	} // if
[c5b55c4]	256	sprintf( buf, "%#llx", v );
	257	str = buf;
[cf5af9c]	258	#endif // __SIZEOF_INT128__
[f6582252]	259	} // if
	260	//printf( "%#llo %llu\n", v, v );
	261	} // if
	262	} else { // decimal constant ?
	263	if ( type < 5 ) { // not L128 ?
	264	sscanf( (char *)str.c_str(), "%llu", &v );
[cf5af9c]	265	#if defined(__SIZEOF_INT128__)
[f6582252]	266	} else { // decimal int128 constant
	267	#define P10_UINT64 10'000'000'000'000'000'000ULL // 19 zeroes
	268	unsigned int len = str.length();
	269	if ( str.length() == 39 && str > (Unsigned ? "340282366920938463463374607431768211455" : "170141183460469231731687303715884105727") )
[ca9d65e]	270	SemanticError( yylloc, "128-bit decimal constant to large \"%s\".", str.c_str() );
[c5b55c4]	271	char buf[32];
[f6582252]	272	if ( len <= 19 ) { // value < 19 decimal digitis
[c5b55c4]	273	sscanf( (char *)str.c_str(), "%llu", &v );
[f6582252]	274	} else {
	275	sscanf( &str[len - 19], "%llu", &v );
[791028a]	276	__int128 val = v; // accumulate bits
[f6582252]	277	str[len - 19] ='\0'; // shorten string
	278	sscanf( &str[len == 39 ? 1 : 0], "%llu", &v );
	279	val += (__int128)v * (__int128)P10_UINT64; // store bits
	280	if ( len == 39 ) { // most significant 2 bits ?
	281	str[1] = '\0'; // shorten string
	282	sscanf( &str[0], "%llu", &v ); // process most significant 2 bits
	283	val += (__int128)v * (__int128)P10_UINT64 * (__int128)P10_UINT64; // store bits
	284	} // if
	285	v = val >> 64; v2 = (uint64_t)val; // replace decimal constant with 2 hex constants
	286	sprintf( buf, "%#llx", v2 );
	287	str2 = buf;
	288	} // if
[c5b55c4]	289	sprintf( buf, "%#llx", v );
	290	str = buf;
[cf5af9c]	291	#endif // __SIZEOF_INT128__
[f6582252]	292	} // if
	293	//printf( "%llu\n", v );
	294	} // if
	295
	296	if ( type == -1 ) { // no suffix => determine type from value size
	297	valueToType( v, dec, type, Unsigned );
	298	} // if
	299	/* printf( "%s %llo %s %llo\n", str.c_str(), v, str2.c_str(), v2 ); */
	300
[0a616e0]	301	//if ( !( 0 <= type && type <= 6 ) ) { printf( "%s %lu %d %s\n", fred.c_str(), fred.length(), type, str.c_str() ); }
	302	assert( 0 <= type && type <= 6 );
[f56c32e]	303
[a6c5d7c]	304	// Constant type is correct for overload resolving.
[bb7422a]	305	ret = new ast::ConstantExpr( location,
	306	new ast::BasicType( kind[Unsigned][type] ), str, v );
[ba01b14]	307	if ( Unsigned && type < 2 ) { // hh or h, less than int ?
[201aeb9]	308	// int i = -1uh => 65535 not -1, so cast is necessary for unsigned, which unfortunately eliminates warnings for large values.
[bb7422a]	309	ret = new ast::CastExpr( location,
	310	ret,
	311	new ast::BasicType( kind[Unsigned][type] ),
	312	ast::ExplicitCast );
[ba01b14]	313	} else if ( ltype != -1 ) { // explicit length ?
[0a616e0]	314	if ( ltype == 6 ) { // int128, (int128)constant
[bb7422a]	315	ret2 = new ast::ConstantExpr( location,
[7a780ad]	316	new ast::BasicType( ast::BasicKind::LongLongSignedInt ),
[bb7422a]	317	str2,
	318	v2 );
	319	ret = build_compoundLiteral( location,
[6cef439]	320	DeclarationNode::newFromTypeData(
	321	addType(
[e048ece]	322	build_basic_type( TypeData::Int128 ),
	323	build_signedness( TypeData::Unsigned ) ) ),
[bb7422a]	324	new InitializerNode(
[6cef439]	325	(new InitializerNode( new ExpressionNode( v2 == 0 ? ret2 : ret ) ))->set_last( new InitializerNode( new ExpressionNode( v2 == 0 ? ret : ret2 ) ) ), true )
[bb7422a]	326	);
[0a616e0]	327	} else { // explicit length, (length_type)constant
[bb7422a]	328	ret = new ast::CastExpr( location,
	329	ret,
	330	new ast::TypeInstType( lnthsInt[Unsigned][ltype], ast::TypeDecl::Dtype ),
	331	ast::ExplicitCast );
[3d8d7a7]	332	if ( ltype == 5 ) { // pointer, intptr( (uintptr_t)constant )
[bb7422a]	333	ret = build_func( location,
	334	new ExpressionNode(
	335	build_varref( location, new string( "intptr" ) ) ),
	336	new ExpressionNode( ret ) );
[0a616e0]	337	} // if
[201aeb9]	338	} // if
[7b1d5ec]	339	} // if
[e8ccca3]	340
[f56c32e]	341	CLEANUP: ;
[ab57786]	342	delete &str; // created by lex
	343	return ret;
[7bf7fb9]	344	} // build_constantInteger
[51b7345]	345
[201aeb9]	346
[ba01b14]	347	static inline void checkFnxFloat( string & str, size_t last, bool & explnth, int & type ) {
	348	string::size_type posn;
	349	// floating-point constant has minimum of 2 characters, 1. or .1, so safe to look ahead
	350	if ( str[1] == 'x' ) { // hex ?
	351	posn = str.find_last_of( "pP" ); // back for exponent (must have)
	352	posn = str.find_first_of( "fF", posn + 1 ); // forward for size (fF allowed in hex constant)
	353	} else {
	354	posn = str.find_last_of( "fF" ); // back for size (fF not allowed)
	355	} // if
[201aeb9]	356	if ( posn == string::npos ) return;
[ba01b14]	357	explnth = true;
[201aeb9]	358	posn += 1; // advance to size
	359	if ( str[posn] == '3' ) { // 32
[ba01b14]	360	if ( str[last] != 'x' ) type = 6;
	361	else type = 7;
[201aeb9]	362	} else if ( str[posn] == '6' ) { // 64
[ba01b14]	363	if ( str[last] != 'x' ) type = 8;
	364	else type = 9;
	365	} else if ( str[posn] == '8' ) { // 80
	366	type = 3;
	367	} else if ( str[posn] == '1' ) { // 16/128
	368	if ( str[posn + 1] == '6' ) { // 16
	369	type = 5;
	370	} else { // 128
	371	if ( str[last] != 'x' ) type = 10;
	372	else type = 11;
	373	} // if
[201aeb9]	374	} else {
	375	assertf( false, "internal error, bad floating point length %s", str.c_str() );
	376	} // if
[ba01b14]	377	} // checkFnxFloat
[201aeb9]	378
	379
[bb7422a]	380	ast::Expr * build_constantFloat(
	381	const CodeLocation & location, string & str ) {
[7a780ad]	382	static const ast::BasicKind kind[2][12] = {
	383	{ ast::BasicKind::Float, ast::BasicKind::Double, ast::BasicKind::LongDouble, ast::BasicKind::uuFloat80, ast::BasicKind::uuFloat128, ast::BasicKind::uFloat16, ast::BasicKind::uFloat32, ast::BasicKind::uFloat32x, ast::BasicKind::uFloat64, ast::BasicKind::uFloat64x, ast::BasicKind::uFloat128, ast::BasicKind::uFloat128x },
	384	{ ast::BasicKind::FloatComplex, ast::BasicKind::DoubleComplex, ast::BasicKind::LongDoubleComplex, ast::BasicKind::NUMBER_OF_BASIC_TYPES, ast::BasicKind::NUMBER_OF_BASIC_TYPES, ast::BasicKind::uFloat16Complex, ast::BasicKind::uFloat32Complex, ast::BasicKind::uFloat32xComplex, ast::BasicKind::uFloat64Complex, ast::BasicKind::uFloat64xComplex, ast::BasicKind::uFloat128Complex, ast::BasicKind::uFloat128xComplex },
[7bf7fb9]	385	};
[59c24b6]	386
[ba01b14]	387	// floating-point constant has minimum of 2 characters 1. or .1
[7bf7fb9]	388	size_t last = str.length() - 1;
[d56e5bc]	389	double v;
[ba01b14]	390	int type; // 0 => float, 1 => double, 3 => long double, ...
	391	bool complx = false; // real, complex
	392	bool explnth = false; // explicit literal length
[d56e5bc]	393
	394	sscanf( str.c_str(), "%lg", &v );
[51b7345]	395
[7bf7fb9]	396	if ( checkI( str[last] ) ) { // imaginary ?
	397	complx = true;
	398	last -= 1; // backup one character
	399	} // if
[0caaa6a]	400
[7bf7fb9]	401	if ( checkF( str[last] ) ) { // float ?
[ba01b14]	402	type = 0;
[7bf7fb9]	403	} else if ( checkD( str[last] ) ) { // double ?
[ba01b14]	404	type = 1;
[7bf7fb9]	405	} else if ( checkL( str[last] ) ) { // long double ?
[ba01b14]	406	type = 2;
	407	} else if ( checkF80( str[last] ) ) { // __float80 ?
	408	type = 3;
	409	} else if ( checkF128( str[last] ) ) { // __float128 ?
	410	type = 4;
[201aeb9]	411	} else {
[ba01b14]	412	type = 1; // double (default if no suffix)
	413	checkFnxFloat( str, last, explnth, type );
[7bf7fb9]	414	} // if
[ba01b14]	415
[7bf7fb9]	416	if ( ! complx && checkI( str[last - 1] ) ) { // imaginary ?
	417	complx = true;
	418	} // if
[51b7345]	419
[ba01b14]	420	assert( 0 <= type && type < 12 );
[bb7422a]	421	ast::Expr * ret = new ast::ConstantExpr( location,
	422	new ast::BasicType( kind[complx][type] ),
	423	str,
	424	v );
	425	// explicit length ?
	426	if ( explnth ) {
	427	ret = new ast::CastExpr( location,
	428	ret,
	429	new ast::BasicType( kind[complx][type] ),
	430	ast::ExplicitCast );
[201aeb9]	431	} // if
[76c62b2]	432
[ab57786]	433	delete &str; // created by lex
	434	return ret;
[7bf7fb9]	435	} // build_constantFloat
[51b7345]	436
[76c62b2]	437	static void sepString( string & str, string & units, char delimit ) {
	438	string::size_type posn = str.find_last_of( delimit ) + 1;
	439	if ( posn != str.length() ) {
[e8ccca3]	440	units = "?" + str.substr( posn ); // extract units
[76c62b2]	441	str.erase( posn ); // remove units
	442	} // if
	443	} // sepString
	444
[bb7422a]	445	ast::Expr * build_constantChar( const CodeLocation & location, string & str ) {
[76c62b2]	446	string units; // units
	447	sepString( str, units, '\'' ); // separate constant from units
	448
[bb7422a]	449	ast::Expr * ret = new ast::ConstantExpr( location,
[7a780ad]	450	new ast::BasicType( ast::BasicKind::Char ),
[bb7422a]	451	str,
	452	(unsigned long long int)(unsigned char)str[1] );
[e8ccca3]	453	if ( units.length() != 0 ) {
[bb7422a]	454	ret = new ast::UntypedExpr( location,
	455	new ast::NameExpr( location, units ),
	456	{ ret } );
[e8ccca3]	457	} // if
[76c62b2]	458
[ab57786]	459	delete &str; // created by lex
	460	return ret;
[7bf7fb9]	461	} // build_constantChar
[51b7345]	462
[bb7422a]	463	ast::Expr * build_constantStr(
	464	const CodeLocation & location,
	465	string & str ) {
[6e3eaa57]	466	assert( str.length() > 0 );
[76c62b2]	467	string units; // units
	468	sepString( str, units, '"' ); // separate constant from units
	469
[bb7422a]	470	ast::Type * strtype;
[513e165]	471	switch ( str[0] ) { // str has >= 2 characters, i.e, null string "" => safe to look at subscripts 0/1
[0d0931d]	472	case 'u':
[513e165]	473	if ( str[1] == '8' ) goto Default; // utf-8 characters => array of char
	474	// lookup type of associated typedef
[bb7422a]	475	strtype = new ast::TypeInstType( "char16_t", ast::TypeDecl::Dtype );
[e612146c]	476	break;
[0d0931d]	477	case 'U':
[bb7422a]	478	strtype = new ast::TypeInstType( "char32_t", ast::TypeDecl::Dtype );
[e612146c]	479	break;
[0d0931d]	480	case 'L':
[bb7422a]	481	strtype = new ast::TypeInstType( "wchar_t", ast::TypeDecl::Dtype );
[e612146c]	482	break;
[0d0931d]	483	Default: // char default string type
	484	default:
[5a2b0b7]	485	strtype = new ast::BasicType( ast::BasicKind::Char );
[e612146c]	486	} // switch
[bb7422a]	487	ast::ArrayType * at = new ast::ArrayType(
	488	strtype,
	489	// Length is adjusted: +1 for '\0' and -2 for '"'
	490	ast::ConstantExpr::from_ulong( location, str.size() + 1 - 2 ),
	491	ast::FixedLen,
	492	ast::DynamicDim );
	493	ast::Expr * ret = new ast::ConstantExpr( location, at, str, std::nullopt );
[e612146c]	494	if ( units.length() != 0 ) {
[bb7422a]	495	ret = new ast::UntypedExpr( location,
	496	new ast::NameExpr( location, units ),
	497	{ ret } );
[e612146c]	498	} // if
[5809461]	499
[ab57786]	500	delete &str; // created by lex
	501	return ret;
[7bf7fb9]	502	} // build_constantStr
[51b7345]	503
[bb7422a]	504	ast::Expr * build_field_name_FLOATING_FRACTIONconstant(
	505	const CodeLocation & location, const string & str ) {
[ca9d65e]	506	if ( str.find_first_not_of( "0123456789", 1 ) != string::npos ) SemanticError( yylloc, "invalid tuple index \"%s\".", str.c_str() );
[bb7422a]	507	ast::Expr * ret = build_constantInteger( location,
	508	*new string( str.substr(1) ) );
[930f69e]	509	delete &str;
	510	return ret;
	511	} // build_field_name_FLOATING_FRACTIONconstant
	512
[bb7422a]	513	ast::Expr * build_field_name_FLOATING_DECIMALconstant(
	514	const CodeLocation & location, const string & str ) {
[ca9d65e]	515	if ( str[str.size() - 1] != '.' ) SemanticError( yylloc, "invalid tuple index \"%s\".", str.c_str() );
[bb7422a]	516	ast::Expr * ret = build_constantInteger(
	517	location, *new string( str.substr( 0, str.size()-1 ) ) );
[930f69e]	518	delete &str;
	519	return ret;
	520	} // build_field_name_FLOATING_DECIMALconstant
	521
[bb7422a]	522	ast::Expr * build_field_name_FLOATINGconstant( const CodeLocation & location,
	523	const string & str ) {
[8780e30]	524	// str is of the form A.B -> separate at the . and return member expression
	525	int a, b;
	526	char dot;
[f43df73]	527	stringstream ss( str );
[8780e30]	528	ss >> a >> dot >> b;
[bb7422a]	529	auto ret = new ast::UntypedMemberExpr( location,
	530	ast::ConstantExpr::from_int( location, b ),
	531	ast::ConstantExpr::from_int( location, a )
	532	);
[8780e30]	533	delete &str;
	534	return ret;
	535	} // build_field_name_FLOATINGconstant
	536
[bb7422a]	537	ast::Expr * make_field_name_fraction_constants( const CodeLocation & location,
	538	ast::Expr * fieldName,
	539	ast::Expr * fracts ) {
	540	if ( nullptr == fracts ) {
	541	return fieldName;
	542	} else if ( auto memberExpr = dynamic_cast<ast::UntypedMemberExpr *>( fracts ) ) {
	543	memberExpr->member = make_field_name_fraction_constants( location,
	544	fieldName,
	545	ast::mutate( memberExpr->aggregate.get() ) );
	546	return memberExpr;
	547	} else {
	548	return new ast::UntypedMemberExpr( location, fracts, fieldName );
[f43df73]	549	} // if
[8780e30]	550	} // make_field_name_fraction_constants
	551
[bb7422a]	552	ast::Expr * build_field_name_fraction_constants( const CodeLocation & location,
	553	ast::Expr * fieldName,
	554	ExpressionNode * fracts ) {
	555	return make_field_name_fraction_constants( location, fieldName, maybeMoveBuild( fracts ) );
[8780e30]	556	} // build_field_name_fraction_constants
	557
[bb7422a]	558	ast::NameExpr * build_varref( const CodeLocation & location,
	559	const string * name ) {
	560	ast::NameExpr * expr = new ast::NameExpr( location, *name );
[7ecbb7e]	561	delete name;
	562	return expr;
[a2e0687]	563	} // build_varref
[51b1202]	564
[bb7422a]	565	ast::QualifiedNameExpr * build_qualified_expr( const CodeLocation & location,
	566	const DeclarationNode * decl_node,
	567	const ast::NameExpr * name ) {
	568	ast::Decl * newDecl = maybeBuild( decl_node );
	569	if ( ast::DeclWithType * newDeclWithType = dynamic_cast<ast::DeclWithType *>( newDecl ) ) {
	570	if ( const ast::Type * t = newDeclWithType->get_type() ) {
	571	if ( auto typeInst = dynamic_cast<const ast::TypeInstType *>( t ) ) {
	572	newDecl = new ast::EnumDecl( location, typeInst->name );
[b0d9ff7]	573	}
	574	}
	575	}
[bb7422a]	576	return new ast::QualifiedNameExpr( location, newDecl, name->name );
[b0d9ff7]	577	}
	578
[bb7422a]	579	ast::QualifiedNameExpr * build_qualified_expr( const CodeLocation & location,
	580	const ast::EnumDecl * decl,
	581	const ast::NameExpr * name ) {
	582	return new ast::QualifiedNameExpr( location, decl, name->name );
[4e2befe3]	583	}
	584
[bb7422a]	585	ast::DimensionExpr * build_dimensionref( const CodeLocation & location,
	586	const string * name ) {
	587	ast::DimensionExpr * expr = new ast::DimensionExpr( location, *name );
[6e50a6b]	588	delete name;
	589	return expr;
	590	} // build_varref
[ea54f1e]	591
[5809461]	592	// TODO: get rid of this and OperKinds and reuse code from OperatorTable
[a2e0687]	593	static const char * OperName[] = { // must harmonize with OperKinds
[5721a6d]	594	// diadic
[e5f2a67]	595	"SizeOf", "AlignOf", "OffsetOf", "?+?", "?-?", "?\\?", "?*?", "?/?", "?%?", "\|\|", "&&",
[5721a6d]	596	"?\|?", "?&?", "?^?", "Cast", "?<<?", "?>>?", "?<?", "?>?", "?<=?", "?>=?", "?==?", "?!=?",
[e5f2a67]	597	"?=?", "?@=?", "?\\=?", "?*=?", "?/=?", "?%=?", "?+=?", "?-=?", "?<<=?", "?>>=?", "?&=?", "?^=?", "?\|=?",
[d9e2280]	598	"?[?]", "...",
[5721a6d]	599	// monadic
[5809461]	600	"+?", "-?", "AddressOf", "*?", "!?", "~?", "++?", "?++", "--?", "?--",
[a2e0687]	601	}; // OperName
[5721a6d]	602
[bb7422a]	603	ast::Expr * build_cast( const CodeLocation & location,
	604	DeclarationNode * decl_node,
[24d6572]	605	ExpressionNode * expr_node,
	606	ast::CastExpr::CastKind kind ) {
[bb7422a]	607	ast::Type * targetType = maybeMoveBuildType( decl_node );
	608	if ( dynamic_cast<ast::VoidType *>( targetType ) ) {
[064e3ff]	609	delete targetType;
[bb7422a]	610	return new ast::CastExpr( location,
	611	maybeMoveBuild( expr_node ),
[24d6572]	612	ast::ExplicitCast, kind );
[064e3ff]	613	} else {
[bb7422a]	614	return new ast::CastExpr( location,
	615	maybeMoveBuild( expr_node ),
	616	targetType,
[24d6572]	617	ast::ExplicitCast, kind );
[064e3ff]	618	} // if
[a2e0687]	619	} // build_cast
[a5f0529]	620
[bb7422a]	621	ast::Expr * build_keyword_cast( const CodeLocation & location,
	622	ast::AggregateDecl::Aggregate target,
	623	ExpressionNode * expr_node ) {
	624	return new ast::KeywordCastExpr( location,
	625	maybeMoveBuild( expr_node ),
	626	target
	627	);
[9a705dc8]	628	}
	629
[bb7422a]	630	ast::Expr * build_virtual_cast( const CodeLocation & location,
	631	DeclarationNode * decl_node,
	632	ExpressionNode * expr_node ) {
	633	return new ast::VirtualCastExpr( location,
	634	maybeMoveBuild( expr_node ),
	635	maybeMoveBuildType( decl_node )
	636	);
[a2e0687]	637	} // build_virtual_cast
[064e3ff]	638
[bb7422a]	639	ast::Expr * build_fieldSel( const CodeLocation & location,
	640	ExpressionNode * expr_node,
	641	ast::Expr * member ) {
	642	return new ast::UntypedMemberExpr( location,
	643	member,
	644	maybeMoveBuild( expr_node )
	645	);
[a2e0687]	646	} // build_fieldSel
[064e3ff]	647
[bb7422a]	648	ast::Expr * build_pfieldSel( const CodeLocation & location,
	649	ExpressionNode * expr_node,
	650	ast::Expr * member ) {
	651	auto deref = new ast::UntypedExpr( location,
	652	new ast::NameExpr( location, "*?" )
	653	);
[64ac636]	654	deref->location = expr_node->location;
[bb7422a]	655	deref->args.push_back( maybeMoveBuild( expr_node ) );
	656	auto ret = new ast::UntypedMemberExpr( location, member, deref );
[064e3ff]	657	return ret;
[a2e0687]	658	} // build_pfieldSel
[064e3ff]	659
[bb7422a]	660	ast::Expr * build_offsetOf( const CodeLocation & location,
	661	DeclarationNode * decl_node,
	662	ast::NameExpr * member ) {
	663	ast::Expr * ret = new ast::UntypedOffsetofExpr( location,
	664	maybeMoveBuildType( decl_node ),
	665	member->name
	666	);
[7a780ad]	667	ret->result = new ast::BasicType( ast::BasicKind::LongUnsignedInt );
[ac71a86]	668	delete member;
	669	return ret;
[a2e0687]	670	} // build_offsetOf
[064e3ff]	671
[bb7422a]	672	ast::Expr * build_and_or( const CodeLocation & location,
	673	ExpressionNode * expr_node1,
	674	ExpressionNode * expr_node2,
	675	ast::LogicalFlag flag ) {
	676	return new ast::LogicalExpr( location,
[61e362f]	677	maybeMoveBuild( expr_node1 ),
	678	maybeMoveBuild( expr_node2 ),
[bb7422a]	679	flag
	680	);
[a2e0687]	681	} // build_and_or
[51e076e]	682
[bb7422a]	683	ast::Expr * build_unary_val( const CodeLocation & location,
	684	OperKinds op,
	685	ExpressionNode * expr_node ) {
	686	std::vector<ast::ptr<ast::Expr>> args;
[702e826]	687	args.push_back( maybeMoveBuild( expr_node ) );
[bb7422a]	688	return new ast::UntypedExpr( location,
	689	new ast::NameExpr( location, OperName[ (int)op ] ),
	690	std::move( args )
	691	);
[a2e0687]	692	} // build_unary_val
	693
[bb7422a]	694	ast::Expr * build_binary_val( const CodeLocation & location,
	695	OperKinds op,
	696	ExpressionNode * expr_node1,
	697	ExpressionNode * expr_node2 ) {
	698	std::vector<ast::ptr<ast::Expr>> args;
[702e826]	699	args.push_back( maybeMoveBuild( expr_node1 ) );
	700	args.push_back( maybeMoveBuild( expr_node2 ) );
[bb7422a]	701	return new ast::UntypedExpr( location,
	702	new ast::NameExpr( location, OperName[ (int)op ] ),
	703	std::move( args )
	704	);
[a2e0687]	705	} // build_binary_val
	706
[bb7422a]	707	ast::Expr * build_cond( const CodeLocation & location,
	708	ExpressionNode * expr_node1,
	709	ExpressionNode * expr_node2,
	710	ExpressionNode * expr_node3 ) {
	711	return new ast::ConditionalExpr( location,
[61e362f]	712	maybeMoveBuild( expr_node1 ),
[bb7422a]	713	maybeMoveBuild( expr_node2 ),
	714	maybeMoveBuild( expr_node3 )
	715	);
[a2e0687]	716	} // build_cond
[51e076e]	717
[bb7422a]	718	ast::Expr * build_tuple( const CodeLocation & location,
	719	ExpressionNode * expr_node ) {
	720	std::vector<ast::ptr<ast::Expr>> exprs;
[907eccb]	721	buildMoveList( expr_node, exprs );
[bb7422a]	722	return new ast::UntypedTupleExpr( location, std::move( exprs ) );
[a2e0687]	723	} // build_tuple
[9706554]	724
[bb7422a]	725	ast::Expr * build_func( const CodeLocation & location,
	726	ExpressionNode * function,
	727	ExpressionNode * expr_node ) {
	728	std::vector<ast::ptr<ast::Expr>> args;
[7ecbb7e]	729	buildMoveList( expr_node, args );
[bb7422a]	730	return new ast::UntypedExpr( location,
	731	maybeMoveBuild( function ),
	732	std::move( args )
	733	);
[a2e0687]	734	} // build_func
[9706554]	735
[bb7422a]	736	ast::Expr * build_compoundLiteral( const CodeLocation & location,
	737	DeclarationNode * decl_node,
	738	InitializerNode * kids ) {
	739	// compound literal type
	740	ast::Decl * newDecl = maybeBuild( decl_node );
	741	// non-sue compound-literal type
	742	if ( ast::DeclWithType * newDeclWithType = dynamic_cast<ast::DeclWithType *>( newDecl ) ) {
	743	return new ast::CompoundLiteralExpr( location,
	744	newDeclWithType->get_type(),
	745	maybeMoveBuild( kids ) );
[630a82a]	746	// these types do not have associated type information
[bb7422a]	747	} else if ( auto newDeclStructDecl = dynamic_cast<ast::StructDecl *>( newDecl ) ) {
	748	if ( newDeclStructDecl->body ) {
	749	return new ast::CompoundLiteralExpr( location,
	750	new ast::StructInstType( newDeclStructDecl ),
	751	maybeMoveBuild( kids ) );
[fbcde64]	752	} else {
[bb7422a]	753	return new ast::CompoundLiteralExpr( location,
	754	new ast::StructInstType( newDeclStructDecl->name ),
	755	maybeMoveBuild( kids ) );
[fbcde64]	756	} // if
[bb7422a]	757	} else if ( auto newDeclUnionDecl = dynamic_cast<ast::UnionDecl *>( newDecl ) ) {
	758	if ( newDeclUnionDecl->body ) {
	759	return new ast::CompoundLiteralExpr( location,
	760	new ast::UnionInstType( newDeclUnionDecl ),
	761	maybeMoveBuild( kids ) );
[fbcde64]	762	} else {
[bb7422a]	763	return new ast::CompoundLiteralExpr( location,
	764	new ast::UnionInstType( newDeclUnionDecl->name ),
	765	maybeMoveBuild( kids ) );
[fbcde64]	766	} // if
[bb7422a]	767	} else if ( auto newDeclEnumDecl = dynamic_cast<ast::EnumDecl *>( newDecl ) ) {
	768	if ( newDeclEnumDecl->body ) {
	769	return new ast::CompoundLiteralExpr( location,
	770	new ast::EnumInstType( newDeclEnumDecl ),
	771	maybeMoveBuild( kids ) );
[fbcde64]	772	} else {
[bb7422a]	773	return new ast::CompoundLiteralExpr( location,
	774	new ast::EnumInstType( newDeclEnumDecl->name ),
	775	maybeMoveBuild( kids ) );
[fbcde64]	776	} // if
[630a82a]	777	} else {
	778	assert( false );
	779	} // if
[a2e0687]	780	} // build_compoundLiteral
[630a82a]	781
[b87a5ed]	782	// Local Variables: //
	783	// tab-width: 4 //
	784	// End: //

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