protected override void DoEmit(EmitContext ec)
{
ec.BeginBlock(InitBlock);
foreach (var s in InitBlock.InitStatements)
{
s.Emit(ec);
}
foreach (var s in InitBlock.Statements)
{
s.Emit(ec);
}
var endLabel = ec.DefineLabel();
var contLabel = ec.DefineLabel();
ec.EmitLabel(contLabel);
ContinueExpression.Emit(ec);
ec.EmitCastToBoolean(ContinueExpression.GetEvaluatedCType(ec));
ec.Emit(OpCode.BranchIfFalse, endLabel);
LoopBody.Emit(ec);
if (NextExpression != null)
{
NextExpression.Emit(ec);
ec.Emit(OpCode.Pop);
}
ec.Emit(OpCode.Jump, contLabel);
ec.EmitLabel(endLabel);
ec.EndBlock();
}
protected override void DoEmit(EmitContext initialContext)
{
initialContext.BeginBlock(InitBlock);
foreach (var s in InitBlock.InitStatements)
{
s.Emit(initialContext);
}
foreach (var s in InitBlock.Statements)
{
s.Emit(initialContext);
}
var nextLabel = initialContext.DefineLabel();
var endLabel = initialContext.DefineLabel();
var ec = initialContext.PushLoop(breakLabel: endLabel, continueLabel: nextLabel);
//
// Test the condition:
// If succeeded then execute the loop body
// If failed, goto END
//
var conditionLabel = ec.DefineLabel();
ec.EmitLabel(conditionLabel);
ContinueExpression.Emit(ec);
ec.EmitCastToBoolean(ContinueExpression.GetEvaluatedCType(ec));
ec.Emit(OpCode.BranchIfFalse, endLabel);
//
// Fall through to the loop body
//
LoopBody.Emit(ec);
//
// Fall through to the NEXT label
// Run the incrementer
// Loop back to the condition
//
ec.EmitLabel(nextLabel);
if (NextExpression != null)
{
NextExpression.Emit(ec);
ec.Emit(OpCode.Pop);
}
ec.Emit(OpCode.Jump, conditionLabel);
//
// Arrive here when the condition fails
//
ec.EmitLabel(endLabel);
ec.EndBlock();
}
protected override void DoEmit(EmitContext ec)
{
InitBlock.Emit(ec);
var endLabel = ec.DefineLabel();
var contLabel = ec.DefineLabel();
ec.EmitLabel(contLabel);
ContinueExpression.Emit(ec);
ec.EmitCastToBoolean(ContinueExpression.GetEvaluatedCType(ec));
ec.Emit(OpCode.BranchIfFalse, endLabel);
LoopBody.Emit(ec);
NextExpression.Emit(ec);
ec.Emit(OpCode.Pop);
ec.Emit(OpCode.Jump, contLabel);
ec.EmitLabel(endLabel);
}
public virtual bool VisitNextExpression(NextExpression expression)
{
VisitExpression(expression);
return(true);
}
