source: src/SynTree/Constant.cc

Last change on this file was b91bfde, checked in by Andrew Beach <ajbeach@…>, 8 months ago

Added and used some helpers. The widely useful one is a from_string helper for constants.

  • Property mode set to 100644
File size: 2.7 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// Constant.cc --
8//
9// Author           : Richard C. Bilson
10// Created On       : Mon May 18 07:44:20 2015
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Wed Feb 13 18:11:22 2019
13// Update Count     : 32
14//
15
16#include <cassert>   // for strict_dynamic_cast, assertf
17#include <iostream>  // for operator<<, ostream, basic_ostream
18#include <string>    // for to_string, string, char_traits, operator<<
19
20#include "Constant.h"
21#include "Expression.h" // for ConstantExpr
22#include "Type.h"    // for BasicType, Type, Type::Qualifiers, PointerType
23
24Constant::Constant( Type * type, std::string rep, std::optional<unsigned long long> ival ) : type( type ), rep( rep ), ival( ival ) {}
25
26Constant::Constant( const Constant &other ) : BaseSyntaxNode( other ), rep( other.rep ), ival( other.ival ) {
27        type = other.type->clone();
28}
29
30Constant::~Constant() { delete type; }
31
32Constant Constant::from_bool( bool b ) {
33        return Constant( new BasicType( Type::Qualifiers(), BasicType::Bool ), b ? "1" : "0" , (unsigned long long int)b );
34}
35
36Constant Constant::from_int( int i ) {
37        return Constant( new BasicType( Type::Qualifiers(), BasicType::SignedInt ), std::to_string( i ), (unsigned long long int)i );
38}
39
40Constant Constant::from_ulong( unsigned long i ) {
41        return Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), std::to_string( i ), (unsigned long long int)i );
42}
43
44Constant Constant::from_string( const std::string & str ) {
45        Type * charType = new BasicType( noQualifiers, BasicType::Char );
46        // Adjust the length of the string for the terminator.
47        Expression * strSize = new ConstantExpr( Constant::from_ulong( str.size() + 1 ) );
48        Type * strType = new ArrayType( noQualifiers, charType, strSize, false, false );
49        const std::string strValue = "\"" + str + "\"";
50        return Constant( strType, strValue, std::nullopt );
51}
52
53Constant Constant::null( Type * ptrtype ) {
54        if ( nullptr == ptrtype ) {
55                ptrtype = new PointerType(
56                        Type::Qualifiers(),
57                        new VoidType( Type::Qualifiers() )
58                        );
59        }
60
61        return Constant( ptrtype, "0", (unsigned long long int)0 );
62}
63
64unsigned long long Constant::get_ival() const {
65        assertf( strict_dynamic_cast<BasicType*>(type)->isInteger(), "Attempt to retrieve ival from non-integer constant." );
66        return ival.value();
67}
68
69void Constant::print( std::ostream &os, Indenter ) const {
70        os << "(" << rep << " " << (ival ? toString(ival.value()) : "") ;
71        if ( type ) {
72                os << ": ";
73                type->print( os );
74        } // if
75  os << ")";
76}
77
78// Local Variables: //
79// tab-width: 4 //
80// mode: c++ //
81// compile-command: "make install" //
82// End: //
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