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#pragma once
#include "Block.h"
namespace storm {
namespace bs {
STORM_PKG(lang.bs);
/**
* A block we can run break- and continue- statements inside, such as loops.
*/
class Breakable : public Block {
STORM_ABSTRACT_CLASS;
public:
STORM_CTOR Breakable(SrcPos pos, Scope scope);
STORM_CTOR Breakable(SrcPos pos, Block *parent);
// Call to notify this block that we will perform a 'break' at some point.
virtual void STORM_FN willBreak() ABSTRACT;
// Call to notify this block that we will perform a 'continue' at some point.
virtual void STORM_FN willContinue() ABSTRACT;
// State describing where to jump to on break- and continue statements.
class To {
STORM_VALUE;
public:
To(code::Label lbl, code::Block block);
code::Label label;
code::Block block;
};
// Get where to jump on a 'break'. Call during codegen.
virtual To STORM_FN breakTo() ABSTRACT;
// Get where to jump on a 'continue'. Call during codegen.
virtual To STORM_FN continueTo() ABSTRACT;
};
/**
* Break expression.
*/
class Break : public Expr {
STORM_CLASS;
public:
STORM_CTOR Break(SrcPos pos, Block *parent);
// Result.
virtual ExprResult STORM_FN result();
// Generate code.
virtual void STORM_FN code(CodeGen *state, CodeResult *r);
// Don't need to isolate this statement.
virtual Bool STORM_FN isolate();
// To string.
virtual void STORM_FN toS(StrBuf *to) const;
private:
// Block we will break out of.
Breakable *breakFrom;
};
/**
* Continue expression.
*/
class Continue : public Expr {
STORM_CLASS;
public:
STORM_CTOR Continue(SrcPos pos, Block *parent);
// Result.
virtual ExprResult STORM_FN result();
// Generate code.
virtual void STORM_FN code(CodeGen *state, CodeResult *r);
// Don't need to isolate this statement.
virtual Bool STORM_FN isolate();
// To string.
virtual void STORM_FN toS(StrBuf *to) const;
private:
// Block we will continue in.
Breakable *continueIn;
};
}
}
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