source: src/Parser/StatementNode.cc@ dfee306

//
// 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.
//
// StatementNode.cc -- 
//
// Author           : Rodolfo G. Esteves
// Created On       : Sat May 16 14:59:41 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Sat Jun  6 23:25:41 2015
// Update Count     : 19
//

#include <list>
#include <algorithm>
#include <cassert>

#include "ParseNode.h"
#include "SynTree/Statement.h"
#include "SynTree/Expression.h"
#include "parseutility.h"
#include "utility.h"

using namespace std;

const char *StatementNode::StType[] = {
        "Exp",   "If",       "Switch", "Case",    "Default",  "Choose",   "Fallthru", 
        "While", "Do",       "For", 
        "Goto",  "Continue", "Break",  "Return",  "Throw",
        "Try",   "Catch",    "Finally", "Asm",
        "Decl"
};

StatementNode::StatementNode() : ParseNode(), control( 0 ), block( 0 ), labels( 0 ), target( 0 ), decl( 0 ), isCatchRest ( false ) {}

StatementNode::StatementNode( const string *name_ ) : ParseNode( name_ ), control( 0 ), block( 0 ), labels( 0 ), target( 0 ), decl( 0 ), isCatchRest ( false ) {}

StatementNode::StatementNode( DeclarationNode *decl ) : type( Decl ), control( 0 ), block( 0 ), labels( 0 ), target( 0 ), isCatchRest ( false ) {
        if ( decl ) {
                if ( DeclarationNode *agg = decl->extractAggregate() ) {
                        this->decl = agg;
                        StatementNode *nextStmt = new StatementNode;
                        nextStmt->type = Decl;
                        nextStmt->decl = decl;
                        next = nextStmt;
                        if ( decl->get_link() ) {
                                next->set_next( new StatementNode( dynamic_cast< DeclarationNode* >( decl->get_link() ) ) );
                                decl->set_next( 0 );
                        } // if
                } else {
                        if ( decl->get_link() ) {
                                next = new StatementNode( dynamic_cast< DeclarationNode* >( decl->get_link() ) );
                                decl->set_next( 0 );
                        } // if
                        this->decl = decl;
                } // if
        } // if
}

StatementNode::StatementNode( Type t, ExpressionNode *ctrl_label, StatementNode *block_ ) :
                type( t ), control( ctrl_label ), block( block_), labels( 0 ), target( 0 ), decl( 0 ), isCatchRest ( false ) {
        if ( t == Default )
                control = 0;
} 

StatementNode::StatementNode( Type t, string *_target ) :
                type( t ), control( 0 ), block( 0 ), labels( 0 ), target(_target ), decl( 0 ), isCatchRest ( false ) {}

StatementNode::~StatementNode() {
        delete control;
        delete block;
        delete labels;
        delete target;
        delete decl;
}

StatementNode * StatementNode::newCatchStmt( DeclarationNode *d, StatementNode *s, bool catchRestP ) {
        StatementNode *ret = new StatementNode( StatementNode::Catch, 0, s ); 
        ret->addDeclaration( d );
        ret->setCatchRest( catchRestP );

        return ret;
}

std::string StatementNode::get_target() const{
        if ( target )
                return *target;

        return string("");
}

StatementNode * StatementNode::clone() const {
        StatementNode *newnode = new StatementNode( type, maybeClone( control ), maybeClone( block ) );
        if ( target ) {
                newnode->target = new string( *target );
        } else {
                newnode->target = 0;
        } // if
        newnode->decl = maybeClone( decl );
        return newnode;
}

void StatementNode::set_control( ExpressionNode *c ) {
        control = c;
}

StatementNode * StatementNode::set_block( StatementNode *b ) {
        block = b;

        return this;
}

ExpressionNode *StatementNode::get_control() const {
        return control;
}

StatementNode *StatementNode::get_block() const {
        return block;
}

StatementNode::Type StatementNode::get_type() const {
        return type;
}

StatementNode *StatementNode::add_label( const std::string *l ) {
        if ( l != 0 ) {
                if ( labels == 0 )
                        labels = new std::list<std::string>();

                labels->push_front(*l ); 
                delete l;
        } // if
        return this;
}

std::list<std::string> *StatementNode::get_labels() const { return labels; }

StatementNode *StatementNode::add_controlexp( ExpressionNode *e ) {
        if ( control && e )
                control->add_to_list( e ); // xxx - check this

        return this;
}

StatementNode *StatementNode::append_block( StatementNode *stmt ) {
        if ( stmt != 0 ) {
                if ( block == 0 )
                        block = stmt;
                else
                        block->set_link( stmt );
        } // if
        return this;
}

StatementNode *StatementNode::append_last_case( StatementNode *stmt ) {
        if ( stmt != 0 ) {
                StatementNode *next = ( StatementNode *)get_link();
                if ( next && ( next->get_type() == StatementNode::Case || next->get_type() == StatementNode::Default ) )
                        next->append_last_case ( stmt );
                else
                        if ( block == 0 )
                                block = stmt;
                        else
                                block->set_link( stmt );
        } // if
        return this;
}

void StatementNode::print( std::ostream &os, int indent ) const {
        if ( labels != 0 ) {
                if ( ! labels->empty()) {
                        std::list<std::string>::const_iterator i;

                        os << string( indent, ' ' );
                        for ( i = labels->begin(); i != labels->end(); i++ )
                                os << *i << ":";
                        os << endl;
                } // if
        } // if

        switch ( type ) {
          case Decl:
                decl->print( os, indent );
                break;
          case Exp:
                if ( control ) {
                        os << string( indent, ' ' );
                        control->print( os, indent );
                        os << endl;
                } else 
                        os << string( indent, ' ' ) << "Null Statement" << endl;
                break;
          default:
                os << string( indent, ' ' ) << StatementNode::StType[type] << endl;
                if ( type == Catch ) {
                        if ( decl ) {
                                os << string( indent + ParseNode::indent_by, ' ' ) << "Declaration: " << endl;
                                decl->print( os, indent + 2*ParseNode::indent_by );
                        } else if ( isCatchRest ) {
                                os << string( indent + ParseNode::indent_by, ' ' ) << "Catches the rest " << endl;
                        } else {
                                ; // should never reach here
                        } // if
                } // if
                if ( control ) {
                        os << string( indent + ParseNode::indent_by, ' ' ) << "Expression: " << endl;
                        control->printList( os, indent + 2*ParseNode::indent_by );
                } // if
                if ( block ) {
                        os << string( indent + ParseNode::indent_by, ' ' ) << "Branches of execution: " << endl;
                        block->printList( os, indent + 2*ParseNode::indent_by );  
                } // if
                if ( target ) {
                        os << string( indent + ParseNode::indent_by, ' ' ) << "Target: " << get_target() << endl;
                } // if
                break;
        } // switch
}

Statement *StatementNode::build() const {
        std::list<Statement *> branches;
        std::list<Expression *> exps;
        std::list<Label> labs;

        if ( labels != 0 ) {
                std::back_insert_iterator< std::list<Label> > lab_it( labs );
                copy( labels->begin(), labels->end(), lab_it );
        } // if

        // try {
        buildList<Statement, StatementNode>( get_block(), branches );

        switch ( type ) {
          case Decl:
                return new DeclStmt( labs, maybeBuild< Declaration >( decl ) );
          case Exp:
                {
                        Expression *e = maybeBuild< Expression >( get_control() );

                        if ( e )
                                return new ExprStmt( labs, e );
                        else
                                return new NullStmt( labs );
                }
          case If:
                {
                        Statement *thenb = 0, *elseb = 0;
                        assert( branches.size() >= 1 );

                        thenb = branches.front();
                        branches.pop_front();
                        if ( ! branches.empty() ) {
                                elseb = branches.front();
                                branches.pop_front();
                        } // if
                        return new IfStmt( labs, notZeroExpr( get_control()->build() ), thenb, elseb );
                }
          case While:
                assert( branches.size() == 1 );
                return new WhileStmt( labs, notZeroExpr( get_control()->build() ), branches.front() );
          case Do:
                assert( branches.size() == 1 );
                return new WhileStmt( labs, notZeroExpr( get_control()->build() ), branches.front(), true );
          case For:
                {
                        assert( branches.size() == 1 );

                        ForCtlExprNode *ctl = dynamic_cast<ForCtlExprNode *>( get_control() );
                        assert( ctl != 0 );

                        Statement *stmt = 0;
                        if ( ctl->get_init() != 0 )
                                stmt = ctl->get_init()->build();

                        Expression *cond = 0;
                        if ( ctl->get_condition() != 0 )
                                cond = notZeroExpr( ctl->get_condition()->build() );

                        Expression *incr = 0;
                        if ( ctl->get_change() != 0 )
                                incr = ctl->get_change()->build();

                        return new ForStmt( labs, stmt, cond, incr, branches.front() );
                }
          case Switch:
                return new SwitchStmt( labs, get_control()->build(), branches );
          case Choose:
                return new ChooseStmt( labs, get_control()->build(), branches );
          case Fallthru:
                return new FallthruStmt( labs );
          case Case: 
                return new CaseStmt( labs, get_control()->build(), branches );
          case Default:
                return new CaseStmt( labs, 0, branches, true );
          case Goto:
                {
                        if ( get_target() == "" ) {                                     // computed goto
                                assert( get_control() != 0 );
                                return new BranchStmt( labs, get_control()->build(), BranchStmt::Goto );
                        } // if

                        return new BranchStmt( labs, get_target(), BranchStmt::Goto );
                }
          case Break:
                return new BranchStmt( labs, get_target(), BranchStmt::Break );
          case Continue:
                return new BranchStmt( labs, get_target(), BranchStmt::Continue );
          case Return:
          case Throw :
                buildList( get_control(), exps );
                if ( exps.size() ==0 )
                        return new ReturnStmt( labs, 0, type == Throw );
                if ( exps.size() > 0 )
                        return new ReturnStmt( labs, exps.back(), type == Throw );
          case Try:
                {
                        assert( branches.size() >= 0 );
                        CompoundStmt *tryBlock = dynamic_cast<CompoundStmt *>( branches.front());
                        branches.pop_front();
                        FinallyStmt *finallyBlock = 0;
                        if ( ( finallyBlock = dynamic_cast<FinallyStmt *>( branches.back())) ) {
                                branches.pop_back();
                        } // if
                        return new TryStmt( labs, tryBlock, branches, finallyBlock );
                }
          case Catch:
                {
                        assert( branches.size() == 1 );

                        return new CatchStmt( labs, maybeBuild< Declaration >( decl ), branches.front(), isCatchRest );
                }
          case Finally:
                {
                        assert( branches.size() == 1 );
                        CompoundStmt *block = dynamic_cast<CompoundStmt *>( branches.front() );
                        assert( block != 0 );

                        return new FinallyStmt( labs, block );
                }
          default:
                // shouldn't be here
                return 0;
        } // switch
}

CompoundStmtNode::CompoundStmtNode() : first( 0 ), last( 0 ) {}

CompoundStmtNode::CompoundStmtNode( const string *name_ ) : StatementNode( name_ ), first( 0 ), last( 0 ) {}

CompoundStmtNode::CompoundStmtNode( StatementNode *stmt ) : first( stmt ) {
        if ( first ) {
                last = ( StatementNode *)( stmt->get_last());
        } else {
                last = 0;
        } // if
}

CompoundStmtNode::~CompoundStmtNode() {
        delete first;
}

void CompoundStmtNode::add_statement( StatementNode *stmt ) {
        if ( stmt != 0 ) {
                last->set_link( stmt );
                last = ( StatementNode *)( stmt->get_link());
        } // if
}

void CompoundStmtNode::print( ostream &os, int indent ) const {
        if ( first ) {
                first->printList( os, indent+2 );
        } // if
}

Statement *CompoundStmtNode::build() const {
        std::list<Label> labs;
        std::list<std::string> *labels = get_labels();

        if ( labels != 0 ) {
                std::back_insert_iterator< std::list<Label> > lab_it( labs );
                copy( labels->begin(), labels->end(), lab_it );
        } // if

        CompoundStmt *cs = new CompoundStmt( labs );
        buildList( first, cs->get_kids() );
        return cs;
}

void NullStmtNode::print( ostream &os, int indent ) const {
        os << string( indent, ' ' ) << "Null Statement:" << endl;
}

Statement *NullStmtNode::build() const { 
        return new NullStmt;
}

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