source: src/Parser/ExpressionNode.cc @ 3b8e52c

//
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// ExpressionNode.cc --
//
// Author           : Rodolfo G. Esteves
// Created On       : Sat May 16 13:17:07 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Tue Aug 16 00:09:20 2016
// Update Count     : 495
//

#include <cassert>
#include <cctype>
#include <climits>
#include <cstdio>
#include <algorithm>
#include <sstream>

#include "ParseNode.h"
#include "TypeData.h"
#include "SynTree/Constant.h"
#include "SynTree/Expression.h"
#include "SynTree/Declaration.h"
#include "Common/UnimplementedError.h"
#include "parseutility.h"
#include "Common/utility.h"

using namespace std;

ExpressionNode::ExpressionNode( const ExpressionNode &other ) : ParseNode( other.get_name() ), extension( other.extension ) {}

//##############################################################################

// Difficult to separate extra parts of constants during lexing because actions are not allow in the middle of patterns:
//
//              prefix action constant action suffix
//
// Alternatively, breaking a pattern using BEGIN does not work if the following pattern can be empty:
//
//              constant BEGIN CONT ...
//              <CONT>(...)? BEGIN 0 ... // possible empty suffix
//
// because the CONT rule is NOT triggered if the pattern is empty. Hence, constants are reparsed here to determine their
// type.

static Type::Qualifiers emptyQualifiers;                                // no qualifiers on constants

static inline bool checkU( char c ) { return c == 'u' || c == 'U'; }
static inline bool checkL( char c ) { return c == 'l' || c == 'L'; }
static inline bool checkF( char c ) { return c == 'f' || c == 'F'; }
static inline bool checkD( char c ) { return c == 'd' || c == 'D'; }
static inline bool checkI( char c ) { return c == 'i' || c == 'I'; }
static inline bool checkX( char c ) { return c == 'x' || c == 'X'; }

Expression *build_constantInteger( std::string & str ) {
        static const BasicType::Kind kind[2][3] = {
                { BasicType::SignedInt, BasicType::LongSignedInt, BasicType::LongLongSignedInt },
                { BasicType::UnsignedInt, BasicType::LongUnsignedInt, BasicType::LongLongUnsignedInt },
        };
        bool dec = true, Unsigned = false;                                      // decimal, unsigned constant
        int size;                                                                                       // 0 => int, 1 => long, 2 => long long
        unsigned long long v;                                                           // converted integral value
        size_t last = str.length() - 1;                                         // last character of constant

        if ( str[0] == '0' ) {                                                          // octal/hex constant ?
                dec = false;
                if ( last != 0 && checkX( str[1] ) ) {                  // hex constant ?
                        sscanf( (char *)str.c_str(), "%llx", &v );
                        //printf( "%llx %llu\n", v, v );
                } else {                                                                                // octal constant
                        sscanf( (char *)str.c_str(), "%llo", &v );
                        //printf( "%llo %llu\n", v, v );
                } // if
        } else {                                                                                        // decimal constant ?
                sscanf( (char *)str.c_str(), "%llu", &v );
                //printf( "%llu %llu\n", v, v );
        } // if

        if ( v <= INT_MAX ) {                                                           // signed int
                size = 0;
        } else if ( v <= UINT_MAX && ! dec ) {                          // unsigned int
                size = 0;
                Unsigned = true;                                                                // unsigned
        } else if ( v <= LONG_MAX ) {                                           // signed long int
                size = 1;
        } else if ( v <= ULONG_MAX && ( ! dec || LONG_MAX == LLONG_MAX ) ) { // signed long int
                size = 1;
                Unsigned = true;                                                                // unsigned long int
        } else if ( v <= LLONG_MAX ) {                                          // signed long long int
                size = 2;
        } else {                                                                                        // unsigned long long int
                size = 2;
                Unsigned = true;                                                                // unsigned long long int
        } // if

        if ( checkU( str[last] ) ) {                                            // suffix 'u' ?
                Unsigned = true;
                if ( last > 0 && checkL( str[last - 1] ) ) {    // suffix 'l' ?
                        size = 1;
                        if ( last > 1 && checkL( str[last - 2] ) ) { // suffix 'll' ?
                                size = 2;
                        } // if
                } // if
        } else if ( checkL( str[ last ] ) ) {                           // suffix 'l' ?
                size = 1;
                if ( last > 0 && checkL( str[last - 1] ) ) {    // suffix 'll' ?
                        size = 2;
                        if ( last > 1 && checkU( str[last - 2] ) ) { // suffix 'u' ?
                                Unsigned = true;
                        } // if
                } else {
                        if ( last > 0 && checkU( str[last - 1] ) ) { // suffix 'u' ?
                                Unsigned = true;
                        } // if
                } // if
        } // if

        return new ConstantExpr( Constant( new BasicType( emptyQualifiers, kind[Unsigned][size] ), str ) );
} // build_constantInteger

Expression *build_constantFloat( std::string & str ) {
        static const BasicType::Kind kind[2][3] = {
                { BasicType::Float, BasicType::Double, BasicType::LongDouble },
                { BasicType::FloatComplex, BasicType::DoubleComplex, BasicType::LongDoubleComplex },
        };

        bool complx = false;                                                            // real, complex
        int size = 1;                                                                           // 0 => float, 1 => double (default), 2 => long double
        // floating-point constant has minimum of 2 characters: 1. or .1
        size_t last = str.length() - 1;

        if ( checkI( str[last] ) ) {                                            // imaginary ?
                complx = true;
                last -= 1;                                                                              // backup one character
        } // if

        if ( checkF( str[last] ) ) {                                            // float ?
                size = 0;
        } else if ( checkD( str[last] ) ) {                                     // double ?
                size = 1;
        } else if ( checkL( str[last] ) ) {                                     // long double ?
                size = 2;
        } // if
        if ( ! complx && checkI( str[last - 1] ) ) {            // imaginary ?
                complx = true;
        } // if

        return new ConstantExpr( Constant( new BasicType( emptyQualifiers, kind[complx][size] ), str ) );
} // build_constantFloat

Expression *build_constantChar( std::string & str ) {
        return new ConstantExpr( Constant( new BasicType( emptyQualifiers, BasicType::Char ), str ) );
} // build_constantChar

ConstantExpr *build_constantStr( std::string & str ) {
        // string should probably be a primitive type
        ArrayType *at = new ArrayType( emptyQualifiers, new BasicType( emptyQualifiers, BasicType::Char ),
                                new ConstantExpr( Constant( new BasicType( emptyQualifiers, BasicType::UnsignedInt ),
                                                                                        toString( str.size()+1-2 ) ) ),  // +1 for '\0' and -2 for '"'
                                                                   false, false );
        return new ConstantExpr( Constant( at, str ) );
} // build_constantStr

NameExpr * build_varref( const string *name, bool labelp ) {
        return new NameExpr( *name, nullptr );
}

static const char *OperName[] = {
        // diadic
        "SizeOf", "AlignOf", "OffsetOf", "?+?", "?-?", "?*?", "?/?", "?%?", "||", "&&",
        "?|?", "?&?", "?^?", "Cast", "?<<?", "?>>?", "?<?", "?>?", "?<=?", "?>=?", "?==?", "?!=?",
        "?=?", "?*=?", "?/=?", "?%=?", "?+=?", "?-=?", "?<<=?", "?>>=?", "?&=?", "?^=?", "?|=?",
        "?[?]", "...",
        // monadic
        "+?", "-?", "AddressOf", "*?", "!?", "~?", "++?", "?++", "--?", "?--", "&&"
};

Expression *build_cast( DeclarationNode *decl_node, ExpressionNode *expr_node ) {
        Type *targetType = decl_node->buildType();
        if ( dynamic_cast< VoidType * >( targetType ) ) {
                delete targetType;
                return new CastExpr( maybeBuild< Expression >(expr_node) );
        } else {
                return new CastExpr( maybeBuild< Expression >(expr_node), targetType );
        } // if
}

Expression *build_fieldSel( ExpressionNode *expr_node, NameExpr *member ) {
        UntypedMemberExpr *ret = new UntypedMemberExpr( member->get_name(), maybeBuild< Expression >(expr_node) );
        delete member;
        return ret;
}

Expression *build_pfieldSel( ExpressionNode *expr_node, NameExpr *member ) {
        UntypedExpr *deref = new UntypedExpr( new NameExpr( "*?" ) );
        deref->get_args().push_back( maybeBuild< Expression >(expr_node) );
        UntypedMemberExpr *ret = new UntypedMemberExpr( member->get_name(), deref );
        delete member;
        return ret;
}

Expression *build_addressOf( ExpressionNode *expr_node ) {
                return new AddressExpr( maybeBuild< Expression >(expr_node) );
}
Expression *build_sizeOfexpr( ExpressionNode *expr_node ) {
        return new SizeofExpr( maybeBuild< Expression >(expr_node) );
}
Expression *build_sizeOftype( DeclarationNode *decl_node ) {
        return new SizeofExpr( decl_node->buildType() );
}
Expression *build_alignOfexpr( ExpressionNode *expr_node ) {
        return new AlignofExpr( maybeBuild< Expression >(expr_node) );
}
Expression *build_alignOftype( DeclarationNode *decl_node ) {
        return new AlignofExpr( decl_node->buildType() );
}
Expression *build_offsetOf( DeclarationNode *decl_node, NameExpr *member ) {
        return new UntypedOffsetofExpr( decl_node->buildType(), member->get_name() );
}

Expression *build_and_or( ExpressionNode *expr_node1, ExpressionNode *expr_node2, bool kind ) {
        return new LogicalExpr( notZeroExpr( maybeBuild< Expression >(expr_node1) ), notZeroExpr( maybeBuild< Expression >(expr_node2) ), kind );
}

Expression *build_unary_val( OperKinds op, ExpressionNode *expr_node ) {
        std::list< Expression * > args;
        args.push_back( maybeBuild< Expression >(expr_node) );
        return new UntypedExpr( new NameExpr( OperName[ (int)op ] ), args );
}
Expression *build_unary_ptr( OperKinds op, ExpressionNode *expr_node ) {
        std::list< Expression * > args;
        args.push_back( new AddressExpr( maybeBuild< Expression >(expr_node) ) );
        return new UntypedExpr( new NameExpr( OperName[ (int)op ] ), args );
}
Expression *build_binary_val( OperKinds op, ExpressionNode *expr_node1, ExpressionNode *expr_node2 ) {
        std::list< Expression * > args;
        args.push_back( maybeBuild< Expression >(expr_node1) );
        args.push_back( maybeBuild< Expression >(expr_node2) );
        return new UntypedExpr( new NameExpr( OperName[ (int)op ] ), args );
}
Expression *build_binary_ptr( OperKinds op, ExpressionNode *expr_node1, ExpressionNode *expr_node2 ) {
        std::list< Expression * > args;
        args.push_back( new AddressExpr( maybeBuild< Expression >(expr_node1) ) );
        args.push_back( maybeBuild< Expression >(expr_node2) );
        return new UntypedExpr( new NameExpr( OperName[ (int)op ] ), args );
}

Expression *build_cond( ExpressionNode *expr_node1, ExpressionNode *expr_node2, ExpressionNode *expr_node3 ) {
        return new ConditionalExpr( notZeroExpr( maybeBuild< Expression >(expr_node1) ), maybeBuild< Expression >(expr_node2), maybeBuild< Expression >(expr_node3) );
}

Expression *build_comma( ExpressionNode *expr_node1, ExpressionNode *expr_node2 ) {
        return new CommaExpr( maybeBuild< Expression >(expr_node1), maybeBuild< Expression >(expr_node2) );
}

Expression *build_attrexpr( NameExpr *var, ExpressionNode * expr_node ) {
        return new AttrExpr( var, maybeBuild< Expression >(expr_node) );
}
Expression *build_attrtype( NameExpr *var, DeclarationNode * decl_node ) {
        return new AttrExpr( var, decl_node->buildType() );
}

Expression *build_tuple( ExpressionNode * expr_node ) {
        TupleExpr *ret = new TupleExpr();
        buildList( expr_node, ret->get_exprs() );
        return ret;
}

Expression *build_func( ExpressionNode * function, ExpressionNode * expr_node ) {
        std::list< Expression * > args;

        buildList( expr_node, args );
        return new UntypedExpr( maybeBuild< Expression >(function), args, nullptr );
}

Expression *build_range( ExpressionNode * low, ExpressionNode *high ) {
        Expression *low_cexpr = maybeBuild< Expression >( low );
        Expression *high_cexpr = maybeBuild< Expression >( high );
        return new RangeExpr( low_cexpr, high_cexpr );
}

Expression *build_asmexpr( ExpressionNode *inout, ConstantExpr *constraint, ExpressionNode *operand ) {
        return new AsmExpr( maybeBuild< Expression >( inout ), constraint, maybeBuild< Expression >(operand) );
}

Expression *build_valexpr( StatementNode *s ) {
        return new UntypedValofExpr( maybeBuild< Statement >(s), nullptr );
}
Expression *build_typevalue( DeclarationNode *decl ) {
        return new TypeExpr( decl->buildType() );
}

Expression *build_compoundLiteral( DeclarationNode *decl_node, InitializerNode *kids ) {
        Declaration * newDecl = maybeBuild< Declaration >(decl_node); // compound literal type
        if ( DeclarationWithType * newDeclWithType = dynamic_cast< DeclarationWithType * >( newDecl ) ) { // non-sue compound-literal type
                return new CompoundLiteralExpr( newDeclWithType->get_type(), maybeBuild< Initializer >(kids) );
        // these types do not have associated type information
        } else if ( StructDecl * newDeclStructDecl = dynamic_cast< StructDecl * >( newDecl )  ) {
                return new CompoundLiteralExpr( new StructInstType( Type::Qualifiers(), newDeclStructDecl->get_name() ), maybeBuild< Initializer >(kids) );
        } else if ( UnionDecl * newDeclUnionDecl = dynamic_cast< UnionDecl * >( newDecl )  ) {
                return new CompoundLiteralExpr( new UnionInstType( Type::Qualifiers(), newDeclUnionDecl->get_name() ), maybeBuild< Initializer >(kids) );
        } else if ( EnumDecl * newDeclEnumDecl = dynamic_cast< EnumDecl * >( newDecl )  ) {
                return new CompoundLiteralExpr( new EnumInstType( Type::Qualifiers(), newDeclEnumDecl->get_name() ), maybeBuild< Initializer >(kids) );
        } else {
                assert( false );
        } // if
}

// Local Variables: //
// tab-width: 4 //
// mode: c++ //
// compile-command: "make install" //
// End: //