source: translator/ControlStruct/ChooseMutator.cc @ 17cd4eb

#include <list>

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

namespace ControlStruct {
    Statement *ChooseMutator::mutate( ChooseStmt *chooseStmt) {
        bool enclosingChoose = insideChoose;
        insideChoose = true;
        mutateAll( chooseStmt->get_branches(), *this );
        insideChoose = enclosingChoose;
        return new SwitchStmt( chooseStmt->get_labels(),  chooseStmt->get_condition(), chooseStmt->get_branches() );
    }

    Statement *ChooseMutator::mutate( SwitchStmt *switchStmt ) {
        bool enclosingChoose = insideChoose;
        insideChoose = false;
        mutateAll( switchStmt->get_branches(), *this );
        insideChoose = enclosingChoose;
        return switchStmt;
    }

    Statement *ChooseMutator::mutate( FallthruStmt *fallthruStmt ) {
        delete fallthruStmt;
        return new NullStmt();
    }

    Statement* ChooseMutator::mutate(CaseStmt *caseStmt) {
        std::list< Statement * > &stmts = caseStmt->get_statements();

        if ( insideChoose ) {
            BranchStmt *posBrk;
            if ( (( posBrk = dynamic_cast< BranchStmt * > ( stmts.back() ) ) && 
                  ( posBrk->get_type() == BranchStmt::Break ))  // last statement in the list is a (superfluous) 'break' 
                 || dynamic_cast< FallthruStmt * > ( stmts.back() ) )
                ; 
            else {
                stmts.push_back( new BranchStmt( std::list< Label >(), "", BranchStmt::Break ) );
            } // if
        } // if

        mutateAll ( stmts, *this );
        return caseStmt;
    }
} // namespace ControlStruct