source: src/Parser/ExpressionNode.cc@ afce1cf

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr new-env no_list persistent-indexer pthread-emulation qualifiedEnum resolv-new with_gc
Last change on this file since afce1cf was 8135d4c, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Merge branch 'master' into references
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File size: 17.0 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 : Rodolfo G. Esteves
10// Created On : Sat May 16 13:17:07 2015
11// Last Modified By : Andrew Beach
12// Last Modified On : Wed Aug 2 11:12:00 2017
13// Update Count : 568
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 "Common/SemanticError.h" // for SemanticError
24#include "Common/utility.h" // for maybeMoveBuild, maybeBuild, CodeLo...
25#include "ParseNode.h" // for ExpressionNode, maybeMoveBuildType
26#include "SynTree/Constant.h" // for Constant
27#include "SynTree/Declaration.h" // for EnumDecl, StructDecl, UnionDecl
28#include "SynTree/Expression.h" // for Expression, ConstantExpr, NameExpr
29#include "SynTree/Statement.h" // for CompoundStmt, Statement
30#include "SynTree/Type.h" // for BasicType, Type, Type::Qualifiers
31#include "parserutility.h" // for notZeroExpr
32
33class Initializer;
34
35using namespace std;
36
37//##############################################################################
38
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
51extern const Type::Qualifiers noQualifiers; // no qualifiers on constants
52
53static inline bool checkU( char c ) { return c == 'u' || c == 'U'; }
54static inline bool checkL( char c ) { return c == 'l' || c == 'L'; }
55static inline bool checkF( char c ) { return c == 'f' || c == 'F'; }
56static inline bool checkD( char c ) { return c == 'd' || c == 'D'; }
57static inline bool checkI( char c ) { return c == 'i' || c == 'I'; }
58static inline bool checkX( char c ) { return c == 'x' || c == 'X'; }
59
60Expression * build_constantInteger( const std::string & str ) {
61 static const BasicType::Kind kind[2][3] = {
62 { BasicType::SignedInt, BasicType::LongSignedInt, BasicType::LongLongSignedInt },
63 { BasicType::UnsignedInt, BasicType::LongUnsignedInt, BasicType::LongLongUnsignedInt },
64 };
65 bool dec = true, Unsigned = false; // decimal, unsigned constant
66 int size; // 0 => int, 1 => long, 2 => long long
67 unsigned long long int v; // converted integral value
68 size_t last = str.length() - 1; // last character of constant
69 Expression * ret;
70
71 // special constants
72 if ( str == "0" ) {
73 ret = new ConstantExpr( Constant( (Type *)new ZeroType( noQualifiers ), str, (unsigned long long int)0 ) );
74 goto CLEANUP;
75 } // if
76 if ( str == "1" ) {
77 ret = new ConstantExpr( Constant( (Type *)new OneType( noQualifiers ), str, (unsigned long long int)1 ) );
78 goto CLEANUP;
79 } // if
80
81 if ( str[0] == '0' ) { // octal/hex constant ?
82 dec = false;
83 if ( last != 0 && checkX( str[1] ) ) { // hex constant ?
84 sscanf( (char *)str.c_str(), "%llx", &v );
85 //printf( "%llx %llu\n", v, v );
86 } else { // octal constant
87 sscanf( (char *)str.c_str(), "%llo", &v );
88 //printf( "%llo %llu\n", v, v );
89 } // if
90 } else { // decimal constant ?
91 sscanf( (char *)str.c_str(), "%llu", &v );
92 //printf( "%llu %llu\n", v, v );
93 } // if
94
95 if ( v <= INT_MAX ) { // signed int
96 size = 0;
97 } else if ( v <= UINT_MAX && ! dec ) { // unsigned int
98 size = 0;
99 Unsigned = true; // unsigned
100 } else if ( v <= LONG_MAX ) { // signed long int
101 size = 1;
102 } else if ( v <= ULONG_MAX && ( ! dec || LONG_MAX == LLONG_MAX ) ) { // signed long int
103 size = 1;
104 Unsigned = true; // unsigned long int
105 } else if ( v <= LLONG_MAX ) { // signed long long int
106 size = 2;
107 } else { // unsigned long long int
108 size = 2;
109 Unsigned = true; // unsigned long long int
110 } // if
111
112 if ( checkU( str[last] ) ) { // suffix 'u' ?
113 Unsigned = true;
114 if ( last > 0 && checkL( str[last - 1] ) ) { // suffix 'l' ?
115 size = 1;
116 if ( last > 1 && checkL( str[last - 2] ) ) { // suffix 'll' ?
117 size = 2;
118 } // if
119 } // if
120 } else if ( checkL( str[ last ] ) ) { // suffix 'l' ?
121 size = 1;
122 if ( last > 0 && checkL( str[last - 1] ) ) { // suffix 'll' ?
123 size = 2;
124 if ( last > 1 && checkU( str[last - 2] ) ) { // suffix 'u' ?
125 Unsigned = true;
126 } // if
127 } else {
128 if ( last > 0 && checkU( str[last - 1] ) ) { // suffix 'u' ?
129 Unsigned = true;
130 } // if
131 } // if
132 } // if
133
134 ret = new ConstantExpr( Constant( new BasicType( noQualifiers, kind[Unsigned][size] ), str, v ) );
135 CLEANUP:
136 delete &str; // created by lex
137 return ret;
138} // build_constantInteger
139
140Expression * build_constantFloat( const std::string & str ) {
141 static const BasicType::Kind kind[2][3] = {
142 { BasicType::Float, BasicType::Double, BasicType::LongDouble },
143 { BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
144 };
145
146 bool complx = false; // real, complex
147 int size = 1; // 0 => float, 1 => double (default), 2 => long double
148 // floating-point constant has minimum of 2 characters: 1. or .1
149 size_t last = str.length() - 1;
150 double v;
151
152 sscanf( str.c_str(), "%lg", &v );
153
154 if ( checkI( str[last] ) ) { // imaginary ?
155 complx = true;
156 last -= 1; // backup one character
157 } // if
158
159 if ( checkF( str[last] ) ) { // float ?
160 size = 0;
161 } else if ( checkD( str[last] ) ) { // double ?
162 size = 1;
163 } else if ( checkL( str[last] ) ) { // long double ?
164 size = 2;
165 } // if
166 if ( ! complx && checkI( str[last - 1] ) ) { // imaginary ?
167 complx = true;
168 } // if
169
170 Expression * ret = new ConstantExpr( Constant( new BasicType( noQualifiers, kind[complx][size] ), str, v ) );
171 delete &str; // created by lex
172 return ret;
173} // build_constantFloat
174
175Expression * build_constantChar( const std::string & str ) {
176 Expression * ret = new ConstantExpr( Constant( new BasicType( noQualifiers, BasicType::Char ), str, (unsigned long long int)(unsigned char)str[1] ) );
177 delete &str; // created by lex
178 return ret;
179} // build_constantChar
180
181ConstantExpr * build_constantStr( const std::string & str ) {
182 // string should probably be a primitive type
183 ArrayType * at = new ArrayType( noQualifiers, new BasicType( Type::Qualifiers( Type::Const ), BasicType::Char ),
184 new ConstantExpr( Constant::from_ulong( str.size() + 1 - 2 ) ), // +1 for '\0' and -2 for '"'
185 false, false );
186 ConstantExpr * ret = new ConstantExpr( Constant( at, str, (unsigned long long int)0 ) ); // constant 0 is ignored for pure string value
187 delete &str; // created by lex
188 return ret;
189} // build_constantStr
190
191Expression * build_field_name_FLOATINGconstant( const std::string & str ) {
192 // str is of the form A.B -> separate at the . and return member expression
193 int a, b;
194 char dot;
195 std::stringstream ss( str );
196 ss >> a >> dot >> b;
197 UntypedMemberExpr * ret = new UntypedMemberExpr( new ConstantExpr( Constant::from_int( b ) ), new ConstantExpr( Constant::from_int( a ) ) );
198 delete &str;
199 return ret;
200} // build_field_name_FLOATINGconstant
201
202Expression * make_field_name_fraction_constants( Expression * fieldName, Expression * fracts ) {
203 if ( fracts ) {
204 if ( UntypedMemberExpr * memberExpr = dynamic_cast< UntypedMemberExpr * >( fracts ) ) {
205 memberExpr->set_member( make_field_name_fraction_constants( fieldName, memberExpr->get_aggregate() ) );
206 return memberExpr;
207 } else {
208 return new UntypedMemberExpr( fracts, fieldName );
209 }
210 }
211 return fieldName;
212} // make_field_name_fraction_constants
213
214Expression * build_field_name_fraction_constants( Expression * fieldName, ExpressionNode * fracts ) {
215 return make_field_name_fraction_constants( fieldName, maybeMoveBuild< Expression >( fracts ) );
216} // build_field_name_fraction_constants
217
218Expression * build_field_name_REALFRACTIONconstant( const std::string & str ) {
219 if ( str.find_first_not_of( "0123456789", 1 ) != string::npos ) throw SemanticError( "invalid tuple index " + str );
220 Expression * ret = build_constantInteger( *new std::string( str.substr(1) ) );
221 delete &str;
222 return ret;
223} // build_field_name_REALFRACTIONconstant
224
225Expression * build_field_name_REALDECIMALconstant( const std::string & str ) {
226 if ( str[str.size()-1] != '.' ) throw SemanticError( "invalid tuple index " + str );
227 Expression * ret = build_constantInteger( *new std::string( str.substr( 0, str.size()-1 ) ) );
228 delete &str;
229 return ret;
230} // build_field_name_REALDECIMALconstant
231
232NameExpr * build_varref( const string * name ) {
233 NameExpr * expr = new NameExpr( *name, nullptr );
234 delete name;
235 return expr;
236} // build_varref
237
238
239static const char * OperName[] = { // must harmonize with OperKinds
240 // diadic
241 "SizeOf", "AlignOf", "OffsetOf", "?+?", "?-?", "?\\?", "?*?", "?/?", "?%?", "||", "&&",
242 "?|?", "?&?", "?^?", "Cast", "?<<?", "?>>?", "?<?", "?>?", "?<=?", "?>=?", "?==?", "?!=?",
243 "?=?", "?@=?", "?\\=?", "?*=?", "?/=?", "?%=?", "?+=?", "?-=?", "?<<=?", "?>>=?", "?&=?", "?^=?", "?|=?",
244 "?[?]", "...",
245 // monadic
246 "+?", "-?", "AddressOf", "*?", "!?", "~?", "++?", "?++", "--?", "?--", "&&"
247}; // OperName
248
249Expression * build_cast( DeclarationNode * decl_node, ExpressionNode * expr_node ) {
250 Type * targetType = maybeMoveBuildType( decl_node );
251 if ( dynamic_cast< VoidType * >( targetType ) ) {
252 delete targetType;
253 return new CastExpr( maybeMoveBuild< Expression >(expr_node) );
254 } else {
255 return new CastExpr( maybeMoveBuild< Expression >(expr_node), targetType );
256 } // if
257} // build_cast
258
259Expression * build_virtual_cast( DeclarationNode * decl_node, ExpressionNode * expr_node ) {
260 Type * targetType = maybeMoveBuildType( decl_node );
261 Expression * castArg = maybeMoveBuild< Expression >( expr_node );
262 return new VirtualCastExpr( castArg, targetType );
263} // build_virtual_cast
264
265Expression * build_fieldSel( ExpressionNode * expr_node, Expression * member ) {
266 UntypedMemberExpr * ret = new UntypedMemberExpr( member, maybeMoveBuild< Expression >(expr_node) );
267 return ret;
268} // build_fieldSel
269
270Expression * build_pfieldSel( ExpressionNode * expr_node, Expression * member ) {
271 UntypedExpr * deref = new UntypedExpr( new NameExpr( "*?" ) );
272 deref->location = expr_node->location;
273 deref->get_args().push_back( maybeMoveBuild< Expression >(expr_node) );
274 UntypedMemberExpr * ret = new UntypedMemberExpr( member, deref );
275 return ret;
276} // build_pfieldSel
277
278Expression * build_addressOf( ExpressionNode * expr_node ) {
279 return new AddressExpr( maybeMoveBuild< Expression >(expr_node) );
280} // build_addressOf
281
282Expression * build_sizeOfexpr( ExpressionNode * expr_node ) {
283 return new SizeofExpr( maybeMoveBuild< Expression >(expr_node) );
284} // build_sizeOfexpr
285
286Expression * build_sizeOftype( DeclarationNode * decl_node ) {
287 return new SizeofExpr( maybeMoveBuildType( decl_node ) );
288} // build_sizeOftype
289
290Expression * build_alignOfexpr( ExpressionNode * expr_node ) {
291 return new AlignofExpr( maybeMoveBuild< Expression >(expr_node) );
292} // build_alignOfexpr
293
294Expression * build_alignOftype( DeclarationNode * decl_node ) {
295 return new AlignofExpr( maybeMoveBuildType( decl_node) );
296} // build_alignOftype
297
298Expression * build_offsetOf( DeclarationNode * decl_node, NameExpr * member ) {
299 Expression * ret = new UntypedOffsetofExpr( maybeMoveBuildType( decl_node ), member->get_name() );
300 delete member;
301 return ret;
302} // build_offsetOf
303
304Expression * build_and_or( ExpressionNode * expr_node1, ExpressionNode * expr_node2, bool kind ) {
305 return new LogicalExpr( notZeroExpr( maybeMoveBuild< Expression >(expr_node1) ), notZeroExpr( maybeMoveBuild< Expression >(expr_node2) ), kind );
306} // build_and_or
307
308Expression * build_unary_val( OperKinds op, ExpressionNode * expr_node ) {
309 std::list< Expression * > args;
310 args.push_back( maybeMoveBuild< Expression >(expr_node) );
311 return new UntypedExpr( new NameExpr( OperName[ (int)op ] ), args );
312} // build_unary_val
313
314Expression * build_unary_ptr( OperKinds op, ExpressionNode * expr_node ) {
315 std::list< Expression * > args;
316 args.push_back( maybeMoveBuild< Expression >(expr_node) ); // xxx
317 return new UntypedExpr( new NameExpr( OperName[ (int)op ] ), args );
318} // build_unary_ptr
319
320Expression * build_binary_val( OperKinds op, ExpressionNode * expr_node1, ExpressionNode * expr_node2 ) {
321 std::list< Expression * > args;
322 args.push_back( maybeMoveBuild< Expression >(expr_node1) );
323 args.push_back( maybeMoveBuild< Expression >(expr_node2) );
324 return new UntypedExpr( new NameExpr( OperName[ (int)op ] ), args );
325} // build_binary_val
326
327Expression * build_binary_ptr( OperKinds op, ExpressionNode * expr_node1, ExpressionNode * expr_node2 ) {
328 std::list< Expression * > args;
329 args.push_back( maybeMoveBuild< Expression >(expr_node1) );
330 args.push_back( maybeMoveBuild< Expression >(expr_node2) );
331 return new UntypedExpr( new NameExpr( OperName[ (int)op ] ), args );
332} // build_binary_ptr
333
334Expression * build_cond( ExpressionNode * expr_node1, ExpressionNode * expr_node2, ExpressionNode * expr_node3 ) {
335 return new ConditionalExpr( notZeroExpr( maybeMoveBuild< Expression >(expr_node1) ), maybeMoveBuild< Expression >(expr_node2), maybeMoveBuild< Expression >(expr_node3) );
336} // build_cond
337
338Expression * build_comma( ExpressionNode * expr_node1, ExpressionNode * expr_node2 ) {
339 return new CommaExpr( maybeMoveBuild< Expression >(expr_node1), maybeMoveBuild< Expression >(expr_node2) );
340} // build_comma
341
342Expression * build_attrexpr( NameExpr * var, ExpressionNode * expr_node ) {
343 return new AttrExpr( var, maybeMoveBuild< Expression >(expr_node) );
344} // build_attrexpr
345
346Expression * build_attrtype( NameExpr * var, DeclarationNode * decl_node ) {
347 return new AttrExpr( var, maybeMoveBuildType( decl_node ) );
348} // build_attrtype
349
350Expression * build_tuple( ExpressionNode * expr_node ) {
351 std::list< Expression * > exprs;
352 buildMoveList( expr_node, exprs );
353 return new UntypedTupleExpr( exprs );;
354} // build_tuple
355
356Expression * build_func( ExpressionNode * function, ExpressionNode * expr_node ) {
357 std::list< Expression * > args;
358 buildMoveList( expr_node, args );
359 return new UntypedExpr( maybeMoveBuild< Expression >(function), args, nullptr );
360} // build_func
361
362Expression * build_range( ExpressionNode * low, ExpressionNode * high ) {
363 return new RangeExpr( maybeMoveBuild< Expression >( low ), maybeMoveBuild< Expression >( high ) );
364} // build_range
365
366Expression * build_asmexpr( ExpressionNode * inout, ConstantExpr * constraint, ExpressionNode * operand ) {
367 return new AsmExpr( maybeMoveBuild< Expression >( inout ), constraint, maybeMoveBuild< Expression >(operand) );
368} // build_asmexpr
369
370Expression * build_valexpr( StatementNode * s ) {
371 return new StmtExpr( dynamic_cast< CompoundStmt * >(maybeMoveBuild< Statement >(s) ) );
372} // build_valexpr
373
374Expression * build_typevalue( DeclarationNode * decl ) {
375 return new TypeExpr( maybeMoveBuildType( decl ) );
376} // build_typevalue
377
378Expression * build_compoundLiteral( DeclarationNode * decl_node, InitializerNode * kids ) {
379 Declaration * newDecl = maybeBuild< Declaration >(decl_node); // compound literal type
380 if ( DeclarationWithType * newDeclWithType = dynamic_cast< DeclarationWithType * >( newDecl ) ) { // non-sue compound-literal type
381 return new CompoundLiteralExpr( newDeclWithType->get_type(), maybeMoveBuild< Initializer >(kids) );
382 // these types do not have associated type information
383 } else if ( StructDecl * newDeclStructDecl = dynamic_cast< StructDecl * >( newDecl ) ) {
384 if ( newDeclStructDecl->has_body() ) {
385 return new CompoundLiteralExpr( new StructInstType( Type::Qualifiers(), newDeclStructDecl ), maybeMoveBuild< Initializer >(kids) );
386 } else {
387 return new CompoundLiteralExpr( new StructInstType( Type::Qualifiers(), newDeclStructDecl->get_name() ), maybeMoveBuild< Initializer >(kids) );
388 } // if
389 } else if ( UnionDecl * newDeclUnionDecl = dynamic_cast< UnionDecl * >( newDecl ) ) {
390 if ( newDeclUnionDecl->has_body() ) {
391 return new CompoundLiteralExpr( new UnionInstType( Type::Qualifiers(), newDeclUnionDecl ), maybeMoveBuild< Initializer >(kids) );
392 } else {
393 return new CompoundLiteralExpr( new UnionInstType( Type::Qualifiers(), newDeclUnionDecl->get_name() ), maybeMoveBuild< Initializer >(kids) );
394 } // if
395 } else if ( EnumDecl * newDeclEnumDecl = dynamic_cast< EnumDecl * >( newDecl ) ) {
396 if ( newDeclEnumDecl->has_body() ) {
397 return new CompoundLiteralExpr( new EnumInstType( Type::Qualifiers(), newDeclEnumDecl ), maybeMoveBuild< Initializer >(kids) );
398 } else {
399 return new CompoundLiteralExpr( new EnumInstType( Type::Qualifiers(), newDeclEnumDecl->get_name() ), maybeMoveBuild< Initializer >(kids) );
400 } // if
401 } else {
402 assert( false );
403 } // if
404} // build_compoundLiteral
405
406// Local Variables: //
407// tab-width: 4 //
408// mode: c++ //
409// compile-command: "make install" //
410// End: //
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