source: src/AST/Type.cpp @ e0e9a0b

//
// 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.
//
// Type.cpp --
//
// Author           : Aaron B. Moss
// Created On       : Mon May 13 15:00:00 2019
// Last Modified By : Aaron B. Moss
// Last Modified On : Mon May 13 15:00:00 2019
// Update Count     : 1
//

#include "Type.hpp"

#include <cassert>
#include <utility>               // for move
#include <vector>

#include "Decl.hpp"
#include "ForallSubstitutor.hpp" // for substituteForall
#include "Init.hpp"
#include "Common/utility.h"      // for copy, move
#include "InitTweak/InitTweak.h" // for getPointerBase
#include "Tuples/Tuples.h"       // for isTtype

namespace ast {

const Type * Type::getComponent( unsigned i ) const {
        assertf( size() == 1 && i == 0, "Type::getComponent was called with size %d and index %d\n", size(), i );
        return this;
}

const Type * Type::stripDeclarator() const {
        const Type * t;
        const Type * a;
        for ( t = this; (a = InitTweak::getPointerBase( t )); t = a );
        return t;
}

const Type * Type::stripReferences() const {
        const Type * t;
        const ReferenceType * r;
        for ( t = this; (r = dynamic_cast<const ReferenceType *>(t) ); t = r->base );
        return t;
}

// --- BasicType

const char *BasicType::typeNames[] = {
        "_Bool",
        "char",
        "signed char",
        "unsigned char",
        "signed short int",
        "unsigned short int",
        "signed int",
        "unsigned int",
        "signed long int",
        "unsigned long int",
        "signed long long int",
        "unsigned long long int",
        "__int128",
        "unsigned __int128",
        "_Float16",
        "_Float16 _Complex",
        "_Float32",
        "_Float32 _Complex",
        "float",
        "float _Complex",
        "_Float32x",
        "_Float32x _Complex",
        "_Float64",
        "_Float64 _Complex",
        "double",
        "double _Complex",
        "_Float64x",
        "_Float64x _Complex",
        "__float80",
        "_Float128",
        "_Float128 _Complex",
        "__float128",
        "long double",
        "long double _Complex",
        "_Float128x",
        "_Float128x _Complex",
};
static_assert(
        sizeof(BasicType::typeNames)/sizeof(BasicType::typeNames[0]) == BasicType::NUMBER_OF_BASIC_TYPES,
        "Each basic type name should have a corresponding kind enum value"
);

// --- ParameterizedType

void ParameterizedType::initWithSub( 
        const ParameterizedType & o, Pass< ForallSubstitutor > & sub 
) {
        forall = sub.pass( o.forall );
}

// --- FunctionType

FunctionType::FunctionType( const FunctionType & o )
: ParameterizedType( o.qualifiers, copy( o.attributes ) ), returns(), params(), 
  isVarArgs( o.isVarArgs ) {
        Pass< ForallSubstitutor > sub;
        initWithSub( o, sub );           // initialize substitution map
        returns = sub.pass( o.returns ); // apply to return and parameter types
        params = sub.pass( o.params );
}

namespace {
        bool containsTtype( const std::vector<ptr<DeclWithType>> & l ) {
                if ( ! l.empty() ) {
                        return Tuples::isTtype( l.back()->get_type() );
                }
                return false;
        }
}

bool FunctionType::isTtype() const {
        return containsTtype( returns ) || containsTtype( params );
}

// --- ReferenceToType

void ReferenceToType::initWithSub( const ReferenceToType & o, Pass< ForallSubstitutor > & sub ) {
        ParameterizedType::initWithSub( o, sub ); // initialize substitution
        params = sub.pass( o.params );            // apply to parameters
}

ReferenceToType::ReferenceToType( const ReferenceToType & o )
: ParameterizedType( o.qualifiers, copy( o.attributes ) ), params(), name( o.name ), 
  hoistType( o.hoistType ) {
        Pass< ForallSubstitutor > sub;
        initWithSub( o, sub );
}

std::vector<readonly<Decl>> ReferenceToType::lookup( const std::string& name ) const {
        assertf( aggr(), "Must have aggregate to perform lookup" );

        std::vector<readonly<Decl>> found;
        for ( const Decl * decl : aggr()->members ) {
                if ( decl->name == name ) { found.emplace_back( decl ); }
        }
        return found;
}

// --- StructInstType

StructInstType::StructInstType( 
        const StructDecl * b, CV::Qualifiers q, std::vector<ptr<Attribute>>&& as )
: ReferenceToType( b->name, q, move(as) ), base( b ) {}

bool StructInstType::isComplete() const { return base ? base->body : false; }

// --- UnionInstType

UnionInstType::UnionInstType( 
        const UnionDecl * b, CV::Qualifiers q, std::vector<ptr<Attribute>>&& as )
: ReferenceToType( b->name, q, move(as) ), base( b ) {}

bool UnionInstType::isComplete() const { return base ? base->body : false; }

// --- EnumInstType

EnumInstType::EnumInstType( 
        const EnumDecl * b, CV::Qualifiers q, std::vector<ptr<Attribute>>&& as )
: ReferenceToType( b->name, q, move(as) ), base( b ) {}

bool EnumInstType::isComplete() const { return base ? base->body : false; }

// --- TraitInstType

TraitInstType::TraitInstType( 
        const TraitDecl * b, CV::Qualifiers q, std::vector<ptr<Attribute>>&& as )
: ReferenceToType( b->name, q, move(as) ), base( b ) {}

// --- TypeInstType

TypeInstType::TypeInstType( const TypeInstType & o ) 
: ReferenceToType( o.name, o.qualifiers, copy( o.attributes ) ), base(), kind( o.kind ) {
        Pass< ForallSubstitutor > sub;
        initWithSub( o, sub );      // initialize substitution
        base = sub.pass( o.base );  // apply to base type
}

void TypeInstType::set_base( const TypeDecl * b ) {
        base = b;
        kind = b->kind;
}

bool TypeInstType::isComplete() const { return base->sized; }

// --- TupleType

TupleType::TupleType( std::vector<ptr<Type>> && ts, CV::Qualifiers q )
: Type( q ), types( move(ts) ), members() {
        // This constructor is awkward. `TupleType` needs to contain objects so that members can be
        // named, but members without initializer nodes end up getting constructors, which breaks
        // things. This happens because the object decls have to be visited so that their types are
        // kept in sync with the types listed here. Ultimately, the types listed here should perhaps
        // be eliminated and replaced with a list-view over members. The temporary solution is to
        // make a `ListInit` with `maybeConstructed = false`, so when the object is visited it is not
        // constructed. Potential better solutions include:
        //   a) Separate `TupleType` from its declarations, into `TupleDecl` and `Tuple{Inst?}Type`,
        //      similar to the aggregate types.
        //   b) Separate initializer nodes better, e.g. add a `MaybeConstructed` node that is replaced
        //      by `genInit`, rather than the current boolean flag.
        members.reserve( types.size() );
        for ( const Type * ty : types ) {
                members.emplace_back( new ObjectDecl{
                        CodeLocation{}, "", ty, new ListInit( CodeLocation{}, {}, {}, MaybeConstruct ),
                        Storage::Classes{}, Linkage::Cforall } );
        }
}

}

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