source: src/AST/Stmt.hpp @ 204358b

//
// 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.
//
// Stmt.hpp --
//
// Author           : Aaron B. Moss
// Created On       : Wed May  8 13:00:00 2019
// Last Modified By : Andrew Beach
// Last Modified On : Wed May 15 16:01:00 2019
// Update Count     : 2
//

#pragma once

#include <list>
#include <utility>                // for move
#include <vector>

#include "Label.hpp"
#include "Node.hpp"               // for node, ptr
#include "ParseNode.hpp"
#include "Visitor.hpp"
#include "Common/CodeLocation.h"

// Must be included in *all* AST classes; should be #undef'd at the end of the file
#define MUTATE_FRIEND template<typename node_t> friend auto mutate(const node_t * node);

namespace ast {

class Expr;

/// Base statement node
class Stmt : public ParseNode {
public:
        std::vector<Label> labels;

        Stmt( const CodeLocation & loc, std::vector<Label> && labels = {} )
        : ParseNode(loc), labels(std::move(labels)) {}

        Stmt(const Stmt& o) : ParseNode(o), labels(o.labels) {}

        const Stmt * accept( Visitor & v ) const override = 0;
private:
        Stmt * clone() const override = 0;
        MUTATE_FRIEND
};

/// Compound statement `{ ... }`
class CompoundStmt final : public Stmt {
public:
        std::list<ptr<Stmt>> kids;

        CompoundStmt(const CodeLocation & loc, std::list<ptr<Stmt>> && ks = {} )
        : Stmt(loc), kids(std::move(ks)) {}

        CompoundStmt( const CompoundStmt& o );
        CompoundStmt( CompoundStmt&& o ) = default;

        void push_back( Stmt * s ) { kids.emplace_back( s ); }
        void push_front( Stmt * s ) { kids.emplace_front( s ); }

        const CompoundStmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        CompoundStmt * clone() const override { return new CompoundStmt{ *this }; }
        MUTATE_FRIEND
};

/// Empty statment `;`
class NullStmt final : public Stmt {
public:
        NullStmt( const CodeLocation & loc, std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)) {}

        const NullStmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        NullStmt * clone() const override { return new NullStmt{ *this }; }
        MUTATE_FRIEND
};

/// Expression wrapped by statement
class ExprStmt final : public Stmt {
public:
        ptr<Expr> expr;

        ExprStmt( const CodeLocation & loc, const Expr * e ) : Stmt(loc), expr(e) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        ExprStmt * clone() const override { return new ExprStmt{ *this }; }
        MUTATE_FRIEND
};

class AsmStmt final : public Stmt {
public:
        bool isVolatile;
        ptr<Expr> instruction;
        std::vector<ptr<Expr>> output, input;
        std::vector<ptr<ConstantExpr>> clobber;
        std::vector<Label> gotoLabels;

        AsmStmt( const CodeLocation & loc, bool isVolatile, const Expr * instruction,
                std::vector<ptr<Expr>> && output, std::vector<ptr<Expr>> && input,
                std::vector<ptr<ConstantExpr>> && clobber, std::vector<Label> && gotoLabels,
                std::vector<Label> && labels = {})
        : Stmt(loc, std::move(labels)), isVolatile(isVolatile), instruction(instruction),
          output(std::move(output)), input(std::move(input)), clobber(std::move(clobber)),
          gotoLabels(std::move(gotoLabels)) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        AsmStmt * clone() const override { return new AsmStmt{ *this }; }
        MUTATE_FRIEND
};

class DirectiveStmt final : public Stmt {
public:
        std::string directive;

        DirectiveStmt( const CodeLocation & loc, const std::string & directive,
                std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), directive(directive) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        DirectiveStmt * clone() const override { return new DirectiveStmt{ *this }; }
        MUTATE_FRIEND
};

class IfStmt final : public Stmt {
public:
        ptr<Expr> cond;
        ptr<Stmt> thenPart;
        ptr<Stmt> elsePart;
        std::vector<ptr<Stmt>> inits;

        IfStmt( const CodeLocation & loc, const Expr * cond, const Stmt * thenPart,
                Stmt * const elsePart, std::vector<ptr<Stmt>> && inits,
                std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), cond(cond), thenPart(thenPart), elsePart(elsePart),
          inits(std::move(inits)) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        IfStmt * clone() const override { return new IfStmt{ *this }; }
        MUTATE_FRIEND
};

class SwitchStmt final : public Stmt {
public:
        ptr<Expr> cond;
        std::vector<ptr<Stmt>> stmts;

        SwitchStmt( const CodeLocation & loc, const Expr * cond, std::vector<ptr<Stmt>> && stmts,
                std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), cond(cond), stmts(std::move(stmts)) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        SwitchStmt * clone() const override { return new SwitchStmt{ *this }; }
        MUTATE_FRIEND
};

class CaseStmt final : public Stmt {
public:
        ptr<Expr> cond;
        std::vector<ptr<Stmt>> stmts;

        CaseStmt( const CodeLocation & loc, const Expr * cond, std::vector<ptr<Stmt>> && stmts,
                std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), cond(cond), stmts(std::move(stmts)) {}

        bool isDefault() { return !cond; }

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        CaseStmt * clone() const override { return new CaseStmt{ *this }; }
        MUTATE_FRIEND
};

class WhileStmt final : public Stmt {
public:
        ptr<Expr> cond;
        ptr<Stmt> body;
        std::vector<ptr<Stmt>> inits;
        bool isDoWhile;

        WhileStmt( const CodeLocation & loc, const Expr * cond, const Stmt * body,
                std::vector<ptr<Stmt>> && inits, bool isDoWhile = false, std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), cond(cond), body(body), inits(std::move(inits)),
          isDoWhile(isDoWhile) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        WhileStmt * clone() const override { return new WhileStmt{ *this }; }
        MUTATE_FRIEND
};

class ForStmt final : public Stmt {
public:
        std::vector<ptr<Stmt>> inits;
        ptr<Expr> cond;
        ptr<Expr> inc;
        ptr<Stmt> body;

        ForStmt( const CodeLocation & loc, std::vector<ptr<Stmt>> && inits, const Expr * cond,
                const Expr * inc, const Stmt * body, std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), inits(std::move(inits)), cond(cond), inc(inc),
          body(body) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        ForStmt * clone() const override { return new ForStmt{ *this }; }
        MUTATE_FRIEND
};

class BranchStmt final : public Stmt {
public:
        enum Kind { Goto, Break, Continue, FallThrough, FallThroughDefault };
        static constexpr size_t kindEnd = 1 + (size_t)FallThroughDefault;

        const Label originalTarget;
        Label target;
        ptr<Expr> computedTarget;
        Kind kind;

        BranchStmt( const CodeLocation & loc, Kind kind, Label target,
                std::vector<Label> && labels = {} );
        BranchStmt( const CodeLocation & loc, const Expr * computedTarget,
                std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), originalTarget(loc), target(loc),
          computedTarget(computedTarget), kind(Goto) {}

        const char * kindName() { return kindNames[kind]; }

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        BranchStmt * clone() const override { return new BranchStmt{ *this }; }
        MUTATE_FRIEND

        static const char * kindNames[kindEnd];
};

class ReturnStmt final : public Stmt {
public:
        ptr<Expr> expr;

        ReturnStmt( const CodeLocation & loc, const Expr * expr, std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), expr(expr) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        ReturnStmt * clone() const override { return new ReturnStmt{ *this }; }
        MUTATE_FRIEND
};

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

        ptr<Expr> expr;
        ptr<Expr> target;
        Kind kind;

        ThrowStmt( const CodeLocation & loc, Kind kind, const Expr * expr, const Expr * target,
                std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), expr(expr), target(target), kind(kind) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        ThrowStmt * clone() const override { return new ThrowStmt{ *this }; }
        MUTATE_FRIEND
};

class TryStmt final : public Stmt {
public:
        ptr<CompoundStmt> body;
        std::vector<ptr<CatchStmt>> handlers;
        ptr<FinallyStmt> finally;

        TryStmt( const CodeLocation & loc, const CompoundStmt * body,
                std::vector<ptr<CatchStmt>> && handlers, const FinallyStmt * finally,
                std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), body(body), handlers(std::move(handlers)), finally(finally) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        TryStmt * clone() const override { return new TryStmt{ *this }; }
        MUTATE_FRIEND
};

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

        ptr<Decl> decl;
        ptr<Expr> cond;
        ptr<Stmt> body;
        Kind kind;

        CatchStmt( const CodeLocation & loc, Kind kind, const Decl * decl, const Expr * cond,
                const Stmt * body, std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), decl(decl), cond(cond), body(body), kind(kind) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        CatchStmt * clone() const override { return new CatchStmt{ *this }; }
        MUTATE_FRIEND
};

class FinallyStmt final : public Stmt {
public:
        ptr<CompoundStmt> body;

        FinallyStmt( const CodeLocation & loc, const CompoundStmt * body,
                std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), body(body) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        FinallyStmt * clone() const override { return new FinallyStmt{ *this }; }
        MUTATE_FRIEND
};

class WaitForStmt final : public Stmt {
public:
        struct Target {
                ptr<Expr> function;
                std::vector<ptr<Expr>> arguments;
        };

        struct Clause {
                Target target;
                ptr<Stmt> stmt;
                ptr<Expr> cond;
        };

        struct Timeout {
                ptr<Expr> time;
                ptr<Stmt> stmt;
                ptr<Expr> cond;
        };

        struct OrElse {
                ptr<Stmt> stmt;
                ptr<Expr> cond;
        };

        std::vector<Clause> clauses;
        Timeout timeout;
        OrElse orElse;

        WaitForStmt( const CodeLocation & loc, std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        WaitForStmt * clone() const override { return new WaitForStmt{ *this }; }
        MUTATE_FRIEND
};

class WithStmt final : public Stmt {
public:
        std::vector<ptr<Expr>> exprs;
        ptr<Stmt> stmt;

        WithStmt( const CodeLocation & loc, std::vector<ptr<Expr>> && exprs, const Stmt * stmt,
                std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), exprs(std::move(exprs)), stmt(stmt) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        WithStmt * clone() const override { return new WithStmt{ *this }; }
        MUTATE_FRIEND
};

class DeclStmt final : public Stmt {
public:
        ptr<Decl> decl;

        DeclStmt( const CodeLocation & loc, const Decl * decl, std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), decl(decl) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        DeclStmt * clone() const override { return new DeclStmt{ *this }; }
        MUTATE_FRIEND
};

class ImplicitCtorDtorStmt final : public Stmt {
public:
        readonly<Stmt> callStmt;

        ImplicitCtorDtorStmt( const CodeLocation & loc, const Stmt * callStmt,
                std::vector<Label> && labels = {} )
        : Stmt(loc, std::move(labels)), callStmt(callStmt) {}

        const Stmt * accept( Visitor & v ) const override { return v.visit( this ); }
private:
        ImplicitCtorDtorStmt * clone() const override { return new ImplicitCtorDtorStmt{ *this }; }
        MUTATE_FRIEND
};

//=================================================================================================
/// This disgusting and giant piece of boiler-plate is here to solve a cyclic dependency
/// remove only if there is a better solution
/// The problem is that ast::ptr< ... > uses increment/decrement which won't work well with
/// forward declarations
inline void increment( const class Stmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class Stmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class CompoundStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class CompoundStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class ExprStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class ExprStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class AsmStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class AsmStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class DirectiveStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class DirectiveStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class IfStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class IfStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class WhileStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class WhileStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class ForStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class ForStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class SwitchStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class SwitchStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class CaseStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class CaseStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class BranchStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class BranchStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class ReturnStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class ReturnStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class ThrowStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class ThrowStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class TryStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class TryStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class CatchStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class CatchStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class FinallyStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class FinallyStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class WaitForStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class WaitForStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class WithStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class WithStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class DeclStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class DeclStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class NullStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class NullStmt * node, Node::ref_type ref ) { node->decrement( ref ); }
inline void increment( const class ImplicitCtorDtorStmt * node, Node::ref_type ref ) { node->increment( ref ); }
inline void decrement( const class ImplicitCtorDtorStmt * node, Node::ref_type ref ) { node->decrement( ref ); }

}

#undef MUTATE_FRIEND

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