source: src/SynTree/VarExprReplacer.cc @ 574894d

//
// 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.
//
// VarExprReplacer.h --
//
// Author           : Rob Schluntz
// Created On       : Wed Jan 13 16:29:30 2016
// Last Modified By : Rob Schluntz
// Last Modified On : Fri May 13 11:27:52 2016
// Update Count     : 5
//

#include <iostream>       // for operator<<, basic_ostream, ostream, basic_o...

#include "Common/PassVisitor.h"
#include "Declaration.h"  // for operator<<, DeclarationWithType
#include "Expression.h"   // for VariableExpr
#include "VarExprReplacer.h"

namespace VarExprReplacer {
        namespace {
                /// Visitor that replaces the declarations that VariableExprs refer to, according to the supplied mapping
                struct VarExprReplacer {
                private:
                        const DeclMap & declMap;
                        bool debug;
                public:
                        VarExprReplacer( const DeclMap & declMap, bool debug = false );

                        // replace variable with new node from decl map
                        void previsit( VariableExpr * varExpr );
                };
        }

        void replace( BaseSyntaxNode * node, const DeclMap & declMap, bool debug ) {
                PassVisitor<VarExprReplacer> replacer( declMap, debug );
                maybeAccept( node, replacer );
        }

        namespace {
                VarExprReplacer::VarExprReplacer( const DeclMap & declMap, bool debug ) : declMap( declMap ), debug( debug ) {}

                // replace variable with new node from decl map
                void VarExprReplacer::previsit( 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 ) ) {
                                if ( debug ) {
                                        std::cerr << "replacing variable reference: " << (void*)varExpr->var << " " << varExpr->var << " with " << (void*)declMap.at( varExpr->var ) << " " << declMap.at( varExpr->var ) << std::endl;
                                }
                                varExpr->var = declMap.at( varExpr->var );
                        }
                }
        }
} // namespace VarExprReplacer