source: src/Common/Examine.cc @ 9e3d123

//
// 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.
//
// Examine.cc -- Helpers for examining AST code.
//
// Author           : Andrew Beach
// Created On       : Wed Sept 2 14:02 2020
// Last Modified By : Andrew Beach
// Last Modified On : Fri Dec 10 10:27 2021
// Update Count     : 1
//

#include "Common/Examine.h"

#include "AST/Type.hpp"
#include "CodeGen/OperatorTable.h"
#include "InitTweak/InitTweak.h"

DeclarationWithType * isMainFor( FunctionDecl * func, AggregateDecl::Aggregate kind ) {
        if (func->name != "main") return nullptr;
        if (func->type->parameters.size() != 1) return nullptr;

        auto param = func->type->parameters.front();

        auto type = dynamic_cast<ReferenceType * >(param->get_type());
        if (!type) return nullptr;

        auto obj = dynamic_cast<StructInstType *>(type->base);
        if (!obj) return nullptr;

        if (kind != obj->baseStruct->kind) return nullptr;

        return param;
}

namespace {

// getTypeofThis but does some extra checks used in this module.
const ast::Type * getTypeofThisSolo( const ast::FunctionDecl * func ) {
        if ( 1 != func->params.size() ) {
                return nullptr;
        }
        auto ref = func->type->params.front().as<ast::ReferenceType>();
        return (ref) ? ref->base : nullptr;
}

}

const ast::DeclWithType * isMainFor(
                const ast::FunctionDecl * func, ast::AggregateDecl::Aggregate kind ) {
        if ( "main" != func->name ) return nullptr;
        if ( 1 != func->params.size() ) return nullptr;

        auto param = func->params.front();

        auto type = dynamic_cast<const ast::ReferenceType *>( param->get_type() );
        if ( !type ) return nullptr;

        auto obj = type->base.as<ast::StructInstType>();
        if ( !obj ) return nullptr;

        if ( kind != obj->base->kind ) return nullptr;

        return param;
}

namespace {
        Type * getDestructorParam( FunctionDecl * func ) {
                if ( !CodeGen::isDestructor( func->name ) ) return nullptr;

                auto params = func->type->parameters;
                if ( 1 != params.size() ) return nullptr;

                auto ref = dynamic_cast<ReferenceType *>( params.front()->get_type() );
                if ( ref ) {
                        return ref->base;
                }
                return nullptr;
        }

const ast::Type * getDestructorParam( const ast::FunctionDecl * func ) {
        if ( !CodeGen::isDestructor( func->name ) ) return nullptr;
        //return InitTweak::getParamThis( func )->type;
        return getTypeofThisSolo( func );
}

}

bool isDestructorFor( FunctionDecl * func, StructDecl * type_decl ) {
        if ( Type * type = getDestructorParam( func ) ) {
                auto stype = dynamic_cast<StructInstType *>( type );
                return stype && stype->baseStruct == type_decl;
        }
        return false;
}

bool isDestructorFor(
                const ast::FunctionDecl * func, const ast::StructDecl * type_decl ) {
        if ( const ast::Type * type = getDestructorParam( func ) ) {
                auto stype = dynamic_cast<const ast::StructInstType *>( type );
                return stype && stype->base.get() == type_decl;
        }
        return false;
}