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#pragma once
#include "Block.h"
#include "Breakable.h"
#include "WeakCast.h"
namespace storm {
namespace bs {
STORM_PKG(lang.bs);
/**
* The loop in BS. Either:
* do { }
* do { } while (x);
* do { } while (x) { }
* while (x) { }
*/
class Loop : public Breakable {
STORM_CLASS;
public:
STORM_CTOR Loop(SrcPos pos, Block *parent);
// Set the condition.
void STORM_FN cond(Condition *cond);
// Helpers for common tasks.
void STORM_FN condExpr(Expr *expr);
// Get the condition. Throw on failure.
Condition *STORM_FN cond();
// Do content (if any). Will adopt any variables in the block 'e' to make scoping
// correct in 'while', and allow local variables inside the 'do' part of the loop to be
// used in the condition.
void STORM_FN doBody(Expr *e);
// Set the body for the while expression.
void STORM_FN whileBody(Expr *s);
// Get the scope for the wile body.
CondSuccess *STORM_FN whileBlock();
// Result (always void or 'no return').
virtual ExprResult STORM_FN result();
// Code.
virtual void STORM_FN code(CodeGen *state, CodeResult *r);
// Break- and continue management.
virtual void STORM_FN willBreak();
virtual void STORM_FN willContinue();
virtual Breakable::To STORM_FN breakTo();
virtual Breakable::To STORM_FN continueTo();
// Output.
virtual void STORM_FN toS(StrBuf *to) const;
private:
// Condition (if any).
MAYBE(Condition *) condition;
// Do-content.
MAYBE(Expr *) doExpr;
// While content.
MAYBE(CondSuccess *) whileExpr;
// Did we find any break statements.
Bool anyBreak;
// During codegen: where to break and continue to/from.
code::Block breakBlock;
code::Block continueBlock;
code::Label before;
code::Label after;
// Code generation.
void code(CodeGen *outer, CodeGen *inner, CodeResult *r);
};
}
}
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