source: src/GenPoly/DeclMutator.cc @ a4943d8c

//
// 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.
//
// DeclMutator.cc --
//
// Author           : Aaron B. Moss
// Created On       : Fri Nov 27 14:44:00 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Thu Aug  4 11:16:43 2016
// Update Count     : 3
//

#include "DeclMutator.h"

#include "SynTree/Expression.h"
#include "SynTree/Statement.h"

namespace GenPoly {
        namespace {
                const std::list<Label> noLabels;
        }

        DeclMutator::DeclMutator() : Mutator(), declsToAdd(1), declsToAddAfter(1) {}

        DeclMutator::~DeclMutator() {}
        
        void DeclMutator::mutateDeclarationList( std::list< Declaration* > &decls ) {
                for ( std::list< Declaration* >::iterator decl = decls.begin(); ; ++decl ) {
                        // splice in new declarations after previous decl
                        decls.splice( decl, declsToAddAfter.back() );

                        if ( decl == decls.end() ) break;
                        
                        // run mutator on declaration
                        *decl = maybeMutate( *decl, *this );

                        // splice in new declarations before current decl
                        decls.splice( decl, declsToAdd.back() );
                }
        }

        void DeclMutator::doBeginScope() {
                // add new decl lists for inside of scope
                declsToAdd.resize( declsToAdd.size()+1 );
                declsToAddAfter.resize( declsToAddAfter.size()+1 );
        }

        void DeclMutator::doEndScope() {
                // splice any leftover declarations from this scope onto the containing scope
                std::vector< std::list< Declaration* > >::reverse_iterator back = declsToAdd.rbegin();
                std::vector< std::list< Declaration* > >::reverse_iterator newBack = back + 1;
                newBack->splice( newBack->end(), *back );
                declsToAdd.pop_back();
                
                back = declsToAddAfter.rbegin();
                newBack = back + 1;
                newBack->splice( newBack->end(), *back );
                declsToAddAfter.pop_back();
        }

        Statement* DeclMutator::mutateStatement( Statement *stmt ) {
                // shunt over to compound statement handling if applicable
                CompoundStmt *compoundStmt = dynamic_cast< CompoundStmt* >(stmt);
                if ( compoundStmt ) return mutate( compoundStmt );
                
                doBeginScope();
                
                // run mutator on statement
                stmt = maybeMutate( stmt, *this );
                // return if no declarations to add
                if ( declsToAdd.back().empty() && declsToAddAfter.back().empty() ) {
                        doEndScope();
                        return stmt;
                }

                // otherwise add declarations to new compound statement
                CompoundStmt *compound = new CompoundStmt( noLabels );
                for ( std::list< Declaration* >::iterator decl = declsToAdd.back().begin(); decl != declsToAdd.back().end(); ++decl ) {
                        DeclStmt *declStmt = new DeclStmt( noLabels, *decl );
                        compound->get_kids().push_back( declStmt );
                }
                declsToAdd.back().clear();

                // add mutated statement
                compound->get_kids().push_back( stmt );

                // add declarations after to new compound statement
                for ( std::list< Declaration* >::iterator decl = declsToAddAfter.back().begin(); decl != declsToAddAfter.back().end(); ++decl ) {
                        DeclStmt *declStmt = new DeclStmt( noLabels, *decl );
                        compound->get_kids().push_back( declStmt );
                }
                declsToAddAfter.back().clear();

                doEndScope();
                return compound;
        }

        void DeclMutator::mutateStatementList( std::list< Statement* > &stmts ) {
                doBeginScope();

                
                for ( std::list< Statement* >::iterator stmt = stmts.begin(); ; ++stmt ) {
                        // add any new declarations after the previous statement
                        for ( std::list< Declaration* >::iterator decl = declsToAddAfter.back().begin(); decl != declsToAddAfter.back().end(); ++decl ) {
                                DeclStmt *declStmt = new DeclStmt( noLabels, *decl );
                                stmts.insert( stmt, declStmt );
                        }
                        declsToAddAfter.back().clear();

                        if ( stmt == stmts.end() ) break;
                        
                        // run mutator on statement
                        *stmt = maybeMutate( *stmt, *this );

                        // add any new declarations before the statement
                        for ( std::list< Declaration* >::iterator decl = declsToAdd.back().begin(); decl != declsToAdd.back().end(); ++decl ) {
                                DeclStmt *declStmt = new DeclStmt( noLabels, *decl );
                                stmts.insert( stmt, declStmt );
                        }
                        declsToAdd.back().clear();
                }
                
                doEndScope();
        }

        void DeclMutator::addDeclaration( Declaration *decl ) {
                declsToAdd.back().push_back( decl );
        }

        void DeclMutator::addDeclarationAfter( Declaration *decl ) {
                declsToAddAfter.back().push_back( decl );
        }

        CompoundStmt* DeclMutator::mutate(CompoundStmt *compoundStmt) {
                mutateStatementList( compoundStmt->get_kids() );
                return compoundStmt;
        }
        
        Statement* DeclMutator::mutate(IfStmt *ifStmt) {
                ifStmt->set_condition( maybeMutate( ifStmt->get_condition(), *this ) );
                ifStmt->set_thenPart( mutateStatement( ifStmt->get_thenPart() ) );
                ifStmt->set_elsePart( mutateStatement( ifStmt->get_elsePart() ) );
                return ifStmt;
        }
        
        Statement* DeclMutator::mutate(WhileStmt *whileStmt) {
                whileStmt->set_condition( maybeMutate( whileStmt->get_condition(), *this ) );
                whileStmt->set_body(  mutateStatement( whileStmt->get_body() ) );
                return whileStmt;
        }
        
        Statement* DeclMutator::mutate(ForStmt *forStmt) {
                mutateAll( forStmt->get_initialization(), *this );
                forStmt->set_condition(  maybeMutate( forStmt->get_condition(), *this ) );
                forStmt->set_increment(  maybeMutate( forStmt->get_increment(), *this ) );
                forStmt->set_body(  mutateStatement( forStmt->get_body() ) );
                return forStmt;
        }
        
        Statement* DeclMutator::mutate(SwitchStmt *switchStmt) {
                switchStmt->set_condition( maybeMutate( switchStmt->get_condition(), *this ) );
                mutateAll( switchStmt->get_statements(), *this );
                return switchStmt;
        }
        
        Statement* DeclMutator::mutate(CaseStmt *caseStmt) {
                caseStmt->set_condition( maybeMutate( caseStmt->get_condition(), *this ) );
                mutateAll( caseStmt->get_statements(), *this );
                return caseStmt;
        }
        
        Statement* DeclMutator::mutate(TryStmt *tryStmt) {
                tryStmt->set_block( maybeMutate( tryStmt->get_block(), *this ) );
                mutateAll( tryStmt->get_catchers(), *this );
                tryStmt->set_finally( maybeMutate( tryStmt->get_finally(), *this ) );
                return tryStmt;
        }
        
        Statement* DeclMutator::mutate(CatchStmt *catchStmt) {
                catchStmt->set_decl( maybeMutate( catchStmt->get_decl(), *this ) );
                catchStmt->set_body( mutateStatement( catchStmt->get_body() ) );
                return catchStmt;
        }
}  // namespace GenPoly

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