source: src/SynTree/Statement.h @ 8a1d95af

//
// 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.
//
// Statement.h --
//
// Author           : Richard C. Bilson
// Created On       : Mon May 18 07:44:20 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Fri Jan 10 14:13:24 2020
// Update Count     : 85
//

#pragma once

#include <iosfwd>                  // for ostream
#include <list>                    // for list
#include <memory>                  // for allocator
#include <vector>                                  // for vector

#include "BaseSyntaxNode.h"        // for BaseSyntaxNode
#include "Common/SemanticError.h"  // for SemanticError
#include "Label.h"                 // for Label
#include "Mutator.h"               // for Mutator
#include "Visitor.h"               // for Visitor

class CatchStmt;
class ConstantExpr;
class Declaration;
class Expression;
class FinallyStmt;

class Statement : public BaseSyntaxNode {
  public:
        std::list<Label> labels;

        Statement( const std::list<Label> & labels = {} );
        virtual ~Statement();

        std::list<Label> & get_labels() { return labels; }
        const std::list<Label> & get_labels() const { return labels; }

        virtual Statement * clone() const override = 0;
        virtual void accept( Visitor & v ) override = 0;
        virtual void accept( Visitor & v ) const override = 0;
        virtual Statement * acceptMutator( Mutator & m ) override = 0;
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class CompoundStmt : public Statement {
  public:
        std::list<Statement*> kids;

        CompoundStmt();
        CompoundStmt( std::list<Statement *> stmts );
        CompoundStmt( const CompoundStmt & other );
        virtual ~CompoundStmt();

        std::list<Statement*>& get_kids() { return kids; }
        void push_back( Statement * stmt ) { kids.push_back( stmt ); }
        void push_front( Statement * stmt ) { kids.push_front( stmt ); }

        virtual CompoundStmt * clone() const override { return new CompoundStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual CompoundStmt * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class NullStmt : public Statement {
  public:
        NullStmt( const std::list<Label> & labels = {} );

        virtual NullStmt * clone() const override { return new NullStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual NullStmt * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class ExprStmt : public Statement {
  public:
        Expression * expr;

        ExprStmt( Expression * expr );
        ExprStmt( const ExprStmt & other );
        virtual ~ExprStmt();

        Expression * get_expr() { return expr; }
        void set_expr( Expression * newValue ) { expr = newValue; }

        virtual ExprStmt * clone() const override { return new ExprStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class AsmStmt : public Statement {
  public:
        bool voltile;
        Expression * instruction;
        std::list<Expression *> output, input;
        std::list<ConstantExpr *> clobber;
        std::list<Label> gotolabels;

        AsmStmt( bool voltile, Expression * instruction, std::list<Expression *> output, std::list<Expression *> input, std::list<ConstantExpr *> clobber, std::list<Label> gotolabels );
        AsmStmt( const AsmStmt & other );
        virtual ~AsmStmt();

        bool get_voltile() { return voltile; }
        void set_voltile( bool newValue ) { voltile = newValue; }
        Expression * get_instruction() { return instruction; }
        void set_instruction( Expression * newValue ) { instruction = newValue; }
        std::list<Expression *> & get_output() { return output; }
        void set_output( const std::list<Expression *> & newValue ) { output = newValue; }
        std::list<Expression *> & get_input() { return input; }
        void set_input( const std::list<Expression *> & newValue ) { input = newValue; }
        std::list<ConstantExpr *> & get_clobber() { return clobber; }
        void set_clobber( const std::list<ConstantExpr *> & newValue ) { clobber = newValue; }
        std::list<Label> & get_gotolabels() { return gotolabels; }
        void set_gotolabels( const std::list<Label> & newValue ) { gotolabels = newValue; }

        virtual AsmStmt * clone() const override { return new AsmStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m ) override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class DirectiveStmt : public Statement {
        public:
        std::string directive;

        DirectiveStmt( const std::string & );
        virtual ~DirectiveStmt(){}

        virtual DirectiveStmt * clone() const override { return new DirectiveStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m ) override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class IfStmt : public Statement {
  public:
        Expression * condition;
        Statement * thenPart;
        Statement * elsePart;
        std::list<Statement *> initialization;

        IfStmt( Expression * condition, Statement * thenPart, Statement * elsePart,
                        std::list<Statement *> initialization = std::list<Statement *>() );
        IfStmt( const IfStmt & other );
        virtual ~IfStmt();

        std::list<Statement *> & get_initialization() { return initialization; }
        Expression * get_condition() { return condition; }
        void set_condition( Expression * newValue ) { condition = newValue; }
        Statement * get_thenPart() { return thenPart; }
        void set_thenPart( Statement * newValue ) { thenPart = newValue; }
        Statement * get_elsePart() { return elsePart; }
        void set_elsePart( Statement * newValue ) { elsePart = newValue; }

        virtual IfStmt * clone() const override { return new IfStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class SwitchStmt : public Statement {
  public:
        Expression * condition;
        std::list<Statement *> statements;

        SwitchStmt( Expression * condition, const std::list<Statement *> & statements );
        SwitchStmt( const SwitchStmt & other );
        virtual ~SwitchStmt();

        Expression * get_condition() { return condition; }
        void set_condition( Expression * newValue ) { condition = newValue; }

        std::list<Statement *> & get_statements() { return statements; }

        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }

        virtual SwitchStmt * clone() const override { return new SwitchStmt( *this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;

};

class CaseStmt : public Statement {
  public:
        Expression * condition;
        std::list<Statement *> stmts;

        CaseStmt( Expression * conditions, const std::list<Statement *> & stmts, bool isdef = false ) throw (SemanticErrorException);
        CaseStmt( const CaseStmt & other );
        virtual ~CaseStmt();

        static CaseStmt * makeDefault( const std::list<Label> & labels = {}, std::list<Statement *> stmts = std::list<Statement *>() );

        bool isDefault() const { return _isDefault; }
        void set_default(bool b) { _isDefault = b; }

        Expression * & get_condition() { return condition; }
        void set_condition( Expression * newValue ) { condition = newValue; }

        std::list<Statement *> & get_statements() { return stmts; }
        void set_statements( std::list<Statement *> & newValue ) { stmts = newValue; }

        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }

        virtual CaseStmt * clone() const override { return new CaseStmt( *this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
  private:
        bool _isDefault;
};

class WhileStmt : public Statement {
  public:
        Expression * condition;
        Statement * body;
        std::list<Statement *> initialization;
        bool isDoWhile;

        WhileStmt( Expression * condition, Statement * body, std::list<Statement *> & initialization, bool isDoWhile = false );
        WhileStmt( const WhileStmt & other );
        virtual ~WhileStmt();

        Expression * get_condition() { return condition; }
        void set_condition( Expression * newValue ) { condition = newValue; }
        Statement * get_body() { return body; }
        void set_body( Statement * newValue ) { body = newValue; }
        bool get_isDoWhile() { return isDoWhile; }
        void set_isDoWhile( bool newValue ) { isDoWhile = newValue; }

        virtual WhileStmt * clone() const override { return new WhileStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class ForStmt : public Statement {
  public:
        std::list<Statement *> initialization;
        Expression * condition;
        Expression * increment;
        Statement * body;

        ForStmt( std::list<Statement *> initialization, Expression * condition = nullptr, Expression * increment = nullptr, Statement * body = nullptr );
        ForStmt( const ForStmt & other );
        virtual ~ForStmt();

        std::list<Statement *> & get_initialization() { return initialization; }
        Expression * get_condition() { return condition; }
        void set_condition( Expression * newValue ) { condition = newValue; }
        Expression * get_increment() { return increment; }
        void set_increment( Expression * newValue ) { increment = newValue; }
        Statement * get_body() { return body; }
        void set_body( Statement * newValue ) { body = newValue; }

        virtual ForStmt * clone() const override { return new ForStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class BranchStmt : public Statement {
  public:
        enum Type { Goto = 0, Break, Continue, FallThrough, FallThroughDefault };

        // originalTarget kept for error messages.
        const Label originalTarget;
        Label target;
        Expression * computedTarget;
        Type type;

        BranchStmt( Label target, Type ) throw (SemanticErrorException);
        BranchStmt( Expression * computedTarget, Type ) throw (SemanticErrorException);

        Label get_originalTarget() { return originalTarget; }
        Label get_target() { return target; }
        void set_target( Label newValue ) { target = newValue; }

        Expression * get_computedTarget() { return computedTarget; }
        void set_target( Expression * newValue ) { computedTarget = newValue; }

        Type get_type() { return type; }
        const char * get_typename() { return brType[ type ]; }

        virtual BranchStmt * clone() const override { return new BranchStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
  private:
        static const char * brType[];
};

class ReturnStmt : public Statement {
  public:
        Expression * expr;

        ReturnStmt( Expression * expr );
        ReturnStmt( const ReturnStmt & other );
        virtual ~ReturnStmt();

        Expression * get_expr() { return expr; }
        void set_expr( Expression * newValue ) { expr = newValue; }

        virtual ReturnStmt * clone() const override { return new ReturnStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class ThrowStmt : public Statement {
  public:
        enum Kind { Terminate, Resume };

        const Kind kind;
        Expression * expr;
        Expression * target;

        ThrowStmt( Kind kind, Expression * expr, Expression * target = nullptr );
        ThrowStmt( const ThrowStmt & other );
        virtual ~ThrowStmt();

        Kind get_kind() { return kind; }
        Expression * get_expr() { return expr; }
        void set_expr( Expression * newExpr ) { expr = newExpr; }
        Expression * get_target() { return target; }
        void set_target( Expression * newTarget ) { target = newTarget; }

        virtual ThrowStmt * clone() const override { return new ThrowStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class TryStmt : public Statement {
  public:
        CompoundStmt * block;
        std::list<CatchStmt *> handlers;
        FinallyStmt * finallyBlock;

        TryStmt( CompoundStmt * tryBlock, std::list<CatchStmt *> & handlers, FinallyStmt * finallyBlock = nullptr );
        TryStmt( const TryStmt & other );
        virtual ~TryStmt();

        CompoundStmt * get_block() const { return block; }
        void set_block( CompoundStmt * newValue ) { block = newValue; }
        std::list<CatchStmt *>& get_catchers() { return handlers; }

        FinallyStmt * get_finally() const { return finallyBlock; }
        void set_finally( FinallyStmt * newValue ) { finallyBlock = newValue; }

        virtual TryStmt * clone() const override { return new TryStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class CatchStmt : public Statement {
  public:
        enum Kind { Terminate, Resume };

        const Kind kind;
        Declaration * decl;
        Expression * cond;
        Statement * body;

        CatchStmt( Kind kind, Declaration * decl,
                   Expression * cond, Statement * body );
        CatchStmt( const CatchStmt & other );
        virtual ~CatchStmt();

        Kind get_kind() { return kind; }
        Declaration * get_decl() { return decl; }
        void set_decl( Declaration * newValue ) { decl = newValue; }
        Expression * get_cond() { return cond; }
        void set_cond( Expression * newCond ) { cond = newCond; }
        Statement * get_body() { return body; }
        void set_body( Statement * newValue ) { body = newValue; }

        virtual CatchStmt * clone() const override { return new CatchStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class FinallyStmt : public Statement {
  public:
        CompoundStmt * block;

        FinallyStmt( CompoundStmt * block );
        FinallyStmt( const FinallyStmt & other );
        virtual ~FinallyStmt();

        CompoundStmt * get_block() const { return block; }
        void set_block( CompoundStmt * newValue ) { block = newValue; }

        virtual FinallyStmt * clone() const override { return new FinallyStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class SuspendStmt : public Statement {
  public:
        CompoundStmt * then = nullptr;
        enum Type { None, Coroutine, Generator } type = None;

        SuspendStmt() = default;
        SuspendStmt( const SuspendStmt & );
        virtual ~SuspendStmt();

        virtual SuspendStmt * clone() const override { return new SuspendStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class WaitForStmt : public Statement {
  public:

        struct Target {
                Expression * function;
                std::list<Expression * > arguments;
        };

        struct Clause {
                Target       target;
                Statement  * statement;
                Expression * condition;
        };

        WaitForStmt();
        WaitForStmt( const WaitForStmt & );
        virtual ~WaitForStmt();

        std::vector<Clause> clauses;

        struct {
                Expression * time;
                Statement  * statement;
                Expression * condition;
        } timeout;

        struct {
                Statement  * statement;
                Expression * condition;
        } orelse;

        virtual WaitForStmt * clone() const override { return new WaitForStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;

};

// class WithStmt : public Statement {
// public:
//      std::list< Expression * > exprs;
//      Statement * stmt;

//      WithStmt( const std::list< Expression * > & exprs, Statement * stmt );
//      WithStmt( const WithStmt & other );
//      virtual ~WithStmt();

//      virtual WithStmt * clone() const override { return new WithStmt( *this ); }
//      virtual void accept( Visitor & v ) override { v.visit( this ); }
//      virtual void accept( Visitor & v ) const override { v.visit( this ); }
//      virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
//      virtual void print( std::ostream & os, Indenter indent = {} ) const override;
// };


// represents a declaration that occurs as part of a compound statement
class DeclStmt : public Statement {
  public:
        Declaration * decl;

        DeclStmt( Declaration * decl );
        DeclStmt( const DeclStmt & other );
        virtual ~DeclStmt();

        Declaration * get_decl() const { return decl; }
        void set_decl( Declaration * newValue ) { decl = newValue; }

        virtual DeclStmt * clone() const override { return new DeclStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};


/// represents an implicit application of a constructor or destructor. Qualifiers are replaced immediately before and
/// after the call so that qualified objects can be constructed with the same functions as unqualified objects.
class ImplicitCtorDtorStmt : public Statement {
  public:
        // the constructor/destructor call statement; owned here for a while, eventually transferred elsewhere
        Statement * callStmt;

        ImplicitCtorDtorStmt( Statement * callStmt );
        ImplicitCtorDtorStmt( const ImplicitCtorDtorStmt & other );
        virtual ~ImplicitCtorDtorStmt();

        Statement * get_callStmt() const { return callStmt; }
        void set_callStmt( Statement * newValue ) { callStmt = newValue; }

        virtual ImplicitCtorDtorStmt * clone() const override { return new ImplicitCtorDtorStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

class MutexStmt : public Statement {
  public:
        Statement * stmt;
        std::list<Expression *> mutexObjs; // list of mutex objects to acquire

        MutexStmt( Statement * stmt, std::list<Expression *> mutexObjs );
        MutexStmt( const MutexStmt & other );
        virtual ~MutexStmt();

        virtual MutexStmt * clone() const override { return new MutexStmt( *this ); }
        virtual void accept( Visitor & v ) override { v.visit( this ); }
        virtual void accept( Visitor & v ) const override { v.visit( this ); }
        virtual Statement * acceptMutator( Mutator & m )  override { return m.mutate( this ); }
        virtual void print( std::ostream & os, Indenter indent = {} ) const override;
};

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