public void EmitExtract(IBlockContext context, List <IBlockVariable> targetVariables)
{
IBlockVariable target = targetVariables[0];
Type generatedType = optionType.GeneratedType(context.ModuleContext);
context.IL.Emit(OpCodes.Dup);
context.IL.Emit(OpCodes.Ldfld, generatedType.GetField("defined"));
if (target == null)
{
context.IL.Emit(OpCodes.Pop);
}
else
{
LabelRef onUndefined = context.IL.DefineLabel(true);
LabelRef end = context.IL.DefineLabel(true);
context.IL.Emit(OpCodes.Brfalse_S, onUndefined);
context.IL.Emit(OpCodes.Ldfld, generatedType.GetField("value"));
target.EmitStore(context);
context.IL.Emit(OpCodes.Ldc_I4_1);
context.IL.Emit(OpCodes.Br_S, end);
context.IL.MarkLabel(onUndefined);
context.IL.Emit(OpCodes.Pop);
context.IL.Emit(OpCodes.Ldc_I4_0);
context.IL.MarkLabel(end);
}
}
public void EmitExtract(IBlockContext context, List <IBlockVariable> targetVariables)
{
IBlockVariable target = targetVariables[0];
Type generatedType = resultType.GeneratedType(context.ModuleContext);
context.IL.Emit(OpCodes.Dup);
context.IL.Emit(OpCodes.Ldfld, generatedType.GetField("success"));
if (target == null)
{
context.IL.Emit(OpCodes.Ldc_I4_0);
context.IL.Emit(OpCodes.Ceq);
context.IL.Emit(OpCodes.Pop);
}
else
{
LabelRef onOk = context.IL.DefineLabel(true);
LabelRef end = context.IL.DefineLabel(true);
context.IL.Emit(OpCodes.Brtrue_S, onOk);
context.IL.Emit(OpCodes.Ldfld, generatedType.GetField("error"));
target.EmitStore(context);
context.IL.Emit(OpCodes.Ldc_I4_1);
context.IL.Emit(OpCodes.Br_S, end);
context.IL.MarkLabel(onOk);
context.IL.Emit(OpCodes.Pop);
context.IL.Emit(OpCodes.Ldc_I4_0);
context.IL.MarkLabel(end);
}
}
public override void EmitInitialize(IBlockContext context, IBlockVariable variable)
{
if (runtimeType.IsValueType)
{
return;
}
context.IL.EmitNew(OpCodes.Newobj, constructor, 0, 1);
variable.EmitStore(context);
}
public void EmitAssign(IBlockContext context, IBlockVariable variable, Expression expression,
bool dropResult)
{
expression.EmitCode(context, false);
context.IL.Emit(OpCodes.Conv_R8);
if (!dropResult)
{
context.IL.Emit(OpCodes.Dup);
}
variable.EmitStore(context);
}
/// <summary>
/// Variant of Emit when the result of the expression should be directly stored to a local variable.
/// </summary>
public virtual void EmitStore(IBlockContext context, IBlockVariable variable, bool dropResult)
{
EmitCode(context, false);
if (context.HasErrors)
{
return;
}
if (!dropResult)
{
context.IL.Emit(OpCodes.Dup);
}
variable.EmitStore(context);
}
private ILCount EstimateLoop(IBlockContext context, IForInSource source)
{
IBlockContext prepContext = context.CloneCountingContext();
sourceExpression.EmitCode(prepContext, false);
source.EmitInitialize(prepContext);
IBlockContext countingContext = prepContext.CloneCountingContext()
.CreateLoopContext(context.IL.DefineLabel(false), context.IL.DefineLabel(false));
IBlockVariable loopVariable = countingContext.DeclaredVariable(variableName, true, source.ElementType);
LabelRef loop = countingContext.IL.DefineLabel(false);
source.EmitNext(countingContext);
loopVariable.EmitStore(countingContext);
loopExpression.EmitCode(countingContext, true);
source.EmitCheckDone(countingContext, loop);
return(new ILCount {
opCodes = countingContext.IL.ILSize,
stack = countingContext.IL.StackCount
});
}
public void EmitAssign(IBlockContext context, IBlockVariable variable, Node target)
{
EmitCode(context, target);
variable.Type.AssignFrom(context.ModuleContext, ResultType).EmitConvert(context);
variable.EmitStore(context);
}
public override void EmitCode(IBlockContext context, bool dropResult)
{
RealizedType sourceType = sourceExpression.ResultType(context).UnderlyingType(context.ModuleContext);
IForInSource source = sourceType.ForInSource(context.ModuleContext, variableType);
if (source == null)
{
context.AddError(
new StructuralError(
StructuralError.ErrorType.InvalidType,
$"{sourceType} cannot be use as for ... in source",
Start,
End
)
);
}
if (context.FindVariable(variableName) != null)
{
context.AddError(new StructuralError(
StructuralError.ErrorType.DuplicateVariableName,
$"Variable '{variableName}' already declared in this scope",
Start,
End
));
}
if (source != null && variableType != null &&
!variableType.IsAssignableFrom(context.ModuleContext, source.ElementType))
{
context.AddError(
new StructuralError(
StructuralError.ErrorType.InvalidType,
$"{sourceType} has elements of type {source.ElementType}, expected {variableType}",
Start,
End
)
);
}
if (context.HasErrors)
{
return;
}
using ITempLocalRef loopCounter = context.IL.TempLocal(typeof(int));
ILCount loopSize = EstimateLoop(context, source);
LabelRef start = context.IL.DefineLabel(loopSize.opCodes < 110);
LabelRef end = context.IL.DefineLabel(loopSize.opCodes < 110);
LabelRef loop = context.IL.DefineLabel(loopSize.opCodes < 100);
IBlockContext loopContext = context.CreateLoopContext(start, end);
IBlockVariable loopVariable = loopContext.DeclaredVariable(variableName, true, source !.ElementType);
sourceExpression.EmitCode(context, false);
if (context.HasErrors)
{
return;
}
source.EmitInitialize(loopContext);
loopContext.IL.Emit(start.isShort ? OpCodes.Br_S : OpCodes.Br, start);
loopContext.IL.MarkLabel(loop);
// Timeout check
LabelRef skipCheck = context.IL.DefineLabel(true);
loopCounter.EmitLoad(loopContext);
loopContext.IL.Emit(OpCodes.Ldc_I4_1);
loopContext.IL.Emit(OpCodes.Add);
loopContext.IL.Emit(OpCodes.Dup);
loopCounter.EmitStore(loopContext);
loopContext.IL.Emit(OpCodes.Ldc_I4, 10000);
loopContext.IL.Emit(OpCodes.Cgt);
loopContext.IL.Emit(OpCodes.Brfalse, skipCheck);
loopContext.IL.Emit(OpCodes.Ldc_I4_0);
loopCounter.EmitStore(loopContext);
context.IL.EmitCall(OpCodes.Call, typeof(Runtime.ContextHolder).GetMethod("CheckTimeout"), 0);
loopContext.IL.MarkLabel(skipCheck);
source.EmitNext(loopContext);
loopVariable.EmitStore(loopContext);
loopExpression.EmitCode(loopContext, true);
loopContext.IL.MarkLabel(start);
source.EmitCheckDone(loopContext, loop);
loopContext.IL.MarkLabel(end);
if (!dropResult)
{
context.IL.Emit(OpCodes.Ldnull);
}
}