source: src/AST/DeclReplacer.cpp @ 206ecae

//
// 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.
//
// DeclReplacer.cpp --
//
// Author           : Aaron B. Moss
// Created On       : Wed May 8 13:00:00 2019
// Last Modified By : Andrew Beach
// Last Modified On : Thr Sep 15 11:55:00 2022
// Update Count     : 2
//

#include "DeclReplacer.hpp"

#include "Expr.hpp"
#include "Pass.hpp"
#include "Type.hpp"

namespace ast {

namespace DeclReplacer {

namespace {
        struct DeclReplacer {
        private:
                const DeclMap & declMap;
                const TypeMap & typeMap;
                bool debug;

        public:
                DeclReplacer( const DeclMap & declMap, const TypeMap & typeMap, bool debug )
                        : declMap( declMap ), typeMap( typeMap ), debug( debug )
                {}

                const ast::VariableExpr * previsit( const ast::VariableExpr * );
                const ast::TypeInstType * previsit( const ast::TypeInstType * );
        };

        struct VarExprReplacer {
        private:
                const ExprMap & exprMap;

        public:
                VarExprReplacer( const ExprMap & exprMap ) : exprMap( exprMap ) {}

                const Expr * postvisit( const VariableExpr * );
        };
} // namespace

const ast::Node * replace( const ast::Node * node, const DeclMap & declMap, const TypeMap & typeMap, bool debug ) {
        if(!node) return nullptr;
        Pass<DeclReplacer> replacer = { declMap, typeMap, debug };
        return node->accept( replacer );
}

const ast::Node * replace( const ast::Node * node, const DeclMap & declMap, bool debug ) {
        TypeMap typeMap;
        return replace( node, declMap, typeMap, debug );
}

const ast::Node * replace( const ast::Node * node, const TypeMap & typeMap, bool debug ) {
        DeclMap declMap;
        return replace( node, declMap, typeMap, debug );
}

const ast::Node * replace( const ast::Node * node, const ExprMap & exprMap ) {
        Pass<VarExprReplacer> replacer = {exprMap};
        return node->accept( replacer );
}

namespace {
        // replace variable with new node from decl map
        const ast::VariableExpr * DeclReplacer::previsit( const VariableExpr * varExpr ) {
                // xxx - assertions and parameters aren't accounted for in this... (i.e. they aren't inserted into the map when it's made, only DeclStmts are)
                if ( !declMap.count( varExpr->var ) ) return varExpr;

                auto replacement = declMap.at( varExpr->var );
                if ( debug ) {
                        std::cerr << "replacing variable reference: "
                                << (void*)varExpr->var.get() << " " << varExpr->var
                                << " with " << (void*)replacement << " " << replacement
                                << std::endl;
                }
                auto nexpr = mutate(varExpr);
                nexpr->var = replacement;
                return nexpr;
        }

        const TypeInstType * DeclReplacer::previsit( const TypeInstType * inst ) {
                if ( !typeMap.count( inst->base ) ) return inst;

                auto replacement = typeMap.at( inst->base );
                if ( debug ) {
                        std::cerr << "replacing type reference: "
                                << (void*)inst->base.get() << " " << inst->base
                                << " with " << (void*)replacement << " " << replacement
                                << std::endl;
                }
                auto ninst = mutate(inst);
                ninst->base = replacement;
                return ninst;
        }

        const Expr * VarExprReplacer::postvisit( const VariableExpr * expr ) {
                if ( !exprMap.count( expr->var ) ) return expr;
                return exprMap.at( expr->var );
        }
} // namespace

} // namespace DeclReplacer

} // namespace ast

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