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private MakeMethodBlockParameterRead ( ) : |
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| Результат | ||
// see Ruby Language.doc/Runtime/Control Flow Implementation/Yield
internal override MSA.Expression/*!*/ TransformRead(AstGenerator/*!*/ gen) {
MSA.Expression bfcVariable = gen.CurrentScope.DefineHiddenVariable("#yielded-bfc", typeof(BlockParam));
MSA.Expression resultVariable = gen.CurrentScope.DefineHiddenVariable("#result", typeof(object));
MSA.Expression evalUnwinder = gen.CurrentScope.DefineHiddenVariable("#unwinder", typeof(EvalUnwinder));
MSA.Expression postYield;
if (gen.CompilerOptions.IsEval) {
// eval:
postYield = Methods.EvalYield.OpCall(gen.CurrentRfcVariable, bfcVariable, resultVariable);
} else if (gen.CurrentBlock != null) {
// block:
postYield = Methods.BlockYield.OpCall(gen.CurrentRfcVariable, gen.CurrentBlock.BfcVariable, bfcVariable, resultVariable);
} else {
// method:
postYield = Methods.MethodYield.OpCall(gen.CurrentRfcVariable, bfcVariable, resultVariable);
}
return AstFactory.Block(
gen.DebugMarker("#RB: yield begin"),
Ast.Assign(bfcVariable, Methods.CreateBfcForYield.OpCall(gen.MakeMethodBlockParameterRead())),
Ast.Assign(resultVariable, (Arguments ?? Arguments.Empty).TransformToYield(gen, bfcVariable,
Ast.Property(AstUtils.Convert(gen.MakeMethodBlockParameterRead(), typeof(Proc)), Proc.SelfProperty)
)),
AstUtils.IfThen(postYield, gen.Return(resultVariable)),
gen.DebugMarker("#RB: yield end"),
resultVariable
);
}
internal static MSA.Expression /*!*/ TransformRetry(AstGenerator /*!*/ gen)
{
// eval:
if (gen.CompilerOptions.IsEval)
{
return(Methods.EvalRetry.OpCall(gen.CurrentRfcVariable));
}
// rescue clause:
if (gen.CurrentRescue != null)
{
return(Ast.Block(
Ast.Assign(gen.CurrentRescue.RetryingVariable, Ast.Constant(true)),
Ast.Continue(gen.CurrentRescue.ContinueLabel),
Ast.Empty()
));
}
// block:
if (gen.CurrentBlock != null)
{
return(gen.Return(Methods.BlockRetry.OpCall(gen.CurrentBlock.BfcVariable)));
}
// primary frame:
return(gen.Return(Methods.MethodRetry.OpCall(gen.CurrentRfcVariable, gen.MakeMethodBlockParameterRead())));
}
internal override MSA.Expression /*!*/ TransformRead(AstGenerator /*!*/ gen)
{
if (gen.CurrentMethod.IsTopLevelCode && gen.CurrentBlock == null && !gen.CompilerOptions.IsEval)
{
return(Ast.Throw(Methods.MakeTopLevelSuperException.OpCall()));
}
// invoke super member action:
CallBuilder callBuilder = new CallBuilder(gen);
// self:
callBuilder.Instance = gen.CurrentSelfVariable;
// arguments:
if (Arguments != null)
{
Arguments.TransformToCall(gen, callBuilder);
}
else
{
// copy parameters from the method:
// TODO: parameters in top-level eval
LexicalScope.TransformParametersToSuperCall(gen, callBuilder, gen.CurrentMethod.Parameters);
}
// block:
MSA.Expression transformedBlock;
if (Block != null)
{
transformedBlock = Block.Transform(gen);
}
else
{
transformedBlock = gen.MakeMethodBlockParameterRead();
}
// variable assigned to the transformed block in MakeCallWithBlockRetryable:
MSA.Expression blockArgVariable = gen.CurrentScope.DefineHiddenVariable("#super-call-block", typeof(Proc));
callBuilder.Block = blockArgVariable;
// TODO: this could be improved, currently the right method name and declaring module is always searched for at run-time (at the site):
return(gen.DebugMark(
MethodCall.MakeCallWithBlockRetryable(gen,
callBuilder.MakeSuperCallAction(gen.CurrentFrame.UniqueId),
blockArgVariable,
transformedBlock,
Block != null && Block.IsDefinition
),
"#RB: super call ('" + gen.CurrentMethod.MethodName + "')"
));
}
internal static MSA.Expression /*!*/ MakeCallWithBlockRetryable(AstGenerator /*!*/ gen, MSA.Expression /*!*/ invoke,
MSA.Expression blockArgVariable, MSA.Expression transformedBlock, bool isBlockDefinition)
{
Assert.NotNull(invoke);
Debug.Assert((blockArgVariable == null) == (transformedBlock == null));
// see Ruby Language.doc/Control Flow Implementation/Method Call With a Block
MSA.Expression resultVariable = gen.CurrentScope.DefineHiddenVariable("#method-result", typeof(object));
MSA.ParameterExpression evalUnwinder;
MSA.LabelTarget retryLabel = Ast.Label("retry");
var result = new AstBlock {
Ast.Assign(blockArgVariable, Ast.Convert(transformedBlock, blockArgVariable.Type)),
Ast.Label(retryLabel),
(isBlockDefinition) ? Methods.InitializeBlock.OpCall(blockArgVariable) : null,
AstUtils.Try(
Ast.Assign(resultVariable, invoke)
).Catch(evalUnwinder = Ast.Parameter(typeof(EvalUnwinder), "#u"),
Ast.Assign(
resultVariable,
Ast.Field(evalUnwinder, EvalUnwinder.ReturnValueField)
)
),
Ast.IfThen(Ast.TypeEqual(resultVariable, typeof(BlockReturnResult)),
Ast.IfThenElse(Methods.IsRetrySingleton.OpCall(resultVariable),
// retry:
AstUtils.IfThenElse(Ast.Equal(gen.MakeMethodBlockParameterRead(), blockArgVariable),
RetryStatement.TransformRetry(gen),
Ast.Goto(retryLabel)
),
// return:
gen.Return(ReturnStatement.Propagate(gen, resultVariable))
)
),
resultVariable
};
return(result);
}
internal override MSA.Expression/*!*/ TransformRead(AstGenerator/*!*/ gen) {
if (gen.CurrentMethod.IsTopLevelCode && gen.CurrentBlock == null && !gen.CompilerOptions.IsEval) {
return Ast.Throw(Methods.MakeTopLevelSuperException.OpCall());
}
// invoke super member action:
CallBuilder callBuilder = new CallBuilder(gen);
// self:
callBuilder.Instance = gen.CurrentSelfVariable;
// arguments:
if (Arguments != null) {
Arguments.TransformToCall(gen, callBuilder);
} else {
// copy parameters from the method:
// TODO: parameters in top-level eval
LexicalScope.TransformParametersToSuperCall(gen, callBuilder, gen.CurrentMethod.Parameters);
}
// block:
MSA.Expression transformedBlock;
if (Block != null) {
transformedBlock = Block.Transform(gen);
} else {
transformedBlock = gen.MakeMethodBlockParameterRead();
}
// variable assigned to the transformed block in MakeCallWithBlockRetryable:
MSA.Expression blockArgVariable = gen.CurrentScope.DefineHiddenVariable("#super-call-block", typeof(Proc));
callBuilder.Block = blockArgVariable;
// TODO: this could be improved, currently the right method name and declaring module is always searched for at run-time (at the site):
return gen.DebugMark(
MethodCall.MakeCallWithBlockRetryable(gen,
callBuilder.MakeSuperCallAction(gen.CurrentFrame.UniqueId),
blockArgVariable,
transformedBlock,
Block != null && Block.IsDefinition
),
"#RB: super call ('" + gen.CurrentMethod.MethodName + "')"
);
}
internal static MSA.Expression/*!*/ Propagate(AstGenerator/*!*/ gen, MSA.Expression/*!*/ resultVariable) {
// eval:
if (gen.CompilerOptions.IsEval) {
return Methods.EvalPropagateReturn.OpCall(resultVariable);
}
// block:
if (gen.CurrentBlock != null) {
return Methods.BlockPropagateReturn.OpCall(
gen.CurrentBlock.BfcVariable,
resultVariable
);
}
// method:
return Methods.MethodPropagateReturn.OpCall(
gen.CurrentScopeVariable,
gen.MakeMethodBlockParameterRead(),
Ast.Convert(resultVariable, typeof(BlockReturnResult))
);
}
// see Ruby Language.doc/Runtime/Control Flow Implementation/Yield
internal override MSA.Expression /*!*/ TransformRead(AstGenerator /*!*/ gen)
{
MSA.Expression bfcVariable = gen.CurrentScope.DefineHiddenVariable("#yielded-bfc", typeof(BlockParam));
MSA.Expression resultVariable = gen.CurrentScope.DefineHiddenVariable("#result", typeof(object));
MSA.Expression evalUnwinder = gen.CurrentScope.DefineHiddenVariable("#unwinder", typeof(EvalUnwinder));
MSA.Expression postYield;
if (gen.CompilerOptions.IsEval)
{
// eval:
postYield = Methods.EvalYield.OpCall(gen.CurrentRfcVariable, bfcVariable, resultVariable);
}
else if (gen.CurrentBlock != null)
{
// block:
postYield = Methods.BlockYield.OpCall(gen.CurrentRfcVariable, gen.CurrentBlock.BfcVariable, bfcVariable, resultVariable);
}
else
{
// method:
postYield = Methods.MethodYield.OpCall(gen.CurrentRfcVariable, bfcVariable, resultVariable);
}
return(AstFactory.Block(
gen.DebugMarker("#RB: yield begin"),
Ast.Assign(bfcVariable, Methods.CreateBfcForYield.OpCall(gen.MakeMethodBlockParameterRead())),
Ast.Assign(resultVariable, (Arguments ?? Arguments.Empty).TransformToYield(gen, bfcVariable,
Ast.Property(AstUtils.Convert(gen.MakeMethodBlockParameterRead(), typeof(Proc)), Proc.SelfProperty)
)),
AstUtils.IfThen(postYield, gen.Return(resultVariable)),
gen.DebugMarker("#RB: yield end"),
resultVariable
));
}
internal static MSA.Expression/*!*/ TransformRetry(AstGenerator/*!*/ gen) {
// eval:
if (gen.CompilerOptions.IsEval) {
return Methods.EvalRetry.OpCall(gen.CurrentScopeVariable);
}
// rescue clause:
if (gen.CurrentRescue != null) {
return Ast.Block(
Ast.Assign(gen.CurrentRescue.RetryingVariable, AstUtils.Constant(true)),
Ast.Goto(gen.CurrentRescue.RetryLabel, typeof(void))
);
}
// block:
if (gen.CurrentBlock != null) {
return gen.Return(Methods.BlockRetry.OpCall(gen.CurrentBlock.BfcVariable));
}
// primary frame:
return gen.Return(Methods.MethodRetry.OpCall(gen.CurrentScopeVariable, gen.MakeMethodBlockParameterRead()));
}
internal static MSA.Expression /*!*/ MakeCallWithBlockRetryable(AstGenerator /*!*/ gen, MSA.Expression /*!*/ invoke,
MSA.Expression blockArgVariable, MSA.Expression transformedBlock, bool isBlockDefinition)
{
Assert.NotNull(invoke);
Debug.Assert((blockArgVariable == null) == (transformedBlock == null));
// see Ruby Language.doc/Control Flow Implementation/Method Call With a Block
MSA.Expression resultVariable = gen.CurrentScope.DefineHiddenVariable("#method-result", typeof(object));
MSA.ParameterExpression evalUnwinder = gen.CurrentScope.DefineHiddenVariable("#unwinder", typeof(EvalUnwinder));
MSA.LabelTarget label = Ast.Label();
return(AstFactory.Block(
Ast.Assign(blockArgVariable, Ast.Convert(transformedBlock, blockArgVariable.Type)),
AstFactory.Infinite(label, null,
(!isBlockDefinition) ?
(MSA.Expression)Ast.Empty() :
(MSA.Expression)Methods.InitializeBlock.OpCall(blockArgVariable),
AstUtils.Try(
Ast.Assign(resultVariable, invoke)
).Catch(evalUnwinder,
Ast.Assign(
resultVariable,
Ast.Field(evalUnwinder, EvalUnwinder.ReturnValueField)
)
),
// if result != RetrySingleton then break end
AstUtils.Unless(Methods.IsRetrySingleton.OpCall(AstFactory.Box(resultVariable)), Ast.Break(label)),
// if blockParam == #block then retry end
(gen.CurrentMethod.IsTopLevelCode) ? Ast.Empty() :
AstUtils.IfThen(Ast.Equal(gen.MakeMethodBlockParameterRead(), blockArgVariable), RetryStatement.TransformRetry(gen))
),
resultVariable
));
}
internal static MSA.Expression /*!*/ Propagate(AstGenerator /*!*/ gen, MSA.Expression /*!*/ resultVariable)
{
// eval:
if (gen.CompilerOptions.IsEval)
{
return(Methods.EvalPropagateReturn.OpCall(resultVariable));
}
// block:
if (gen.CurrentBlock != null)
{
return(Methods.BlockPropagateReturn.OpCall(
gen.CurrentBlock.BfcVariable,
resultVariable
));
}
// method:
return(Methods.MethodPropagateReturn.OpCall(
gen.CurrentScopeVariable,
gen.MakeMethodBlockParameterRead(),
Ast.Convert(resultVariable, typeof(BlockReturnResult))
));
}
internal static MSA.Expression/*!*/ MakeCallWithBlockRetryable(AstGenerator/*!*/ gen, MSA.Expression/*!*/ invoke,
MSA.Expression blockArgVariable, MSA.Expression transformedBlock, bool isBlockDefinition) {
Assert.NotNull(invoke);
Debug.Assert((blockArgVariable == null) == (transformedBlock == null));
// see Ruby Language.doc/Control Flow Implementation/Method Call With a Block
MSA.Expression resultVariable = gen.CurrentScope.DefineHiddenVariable("#method-result", typeof(object));
MSA.ParameterExpression evalUnwinder;
MSA.LabelTarget retryLabel = Ast.Label("retry");
var result = new AstBlock {
Ast.Assign(blockArgVariable, Ast.Convert(transformedBlock, blockArgVariable.Type)),
Ast.Label(retryLabel),
(isBlockDefinition) ? Methods.InitializeBlock.OpCall(blockArgVariable) : null,
AstUtils.Try(
Ast.Assign(resultVariable, invoke)
).Catch(evalUnwinder = Ast.Parameter(typeof(EvalUnwinder), "#u"),
Ast.Assign(
resultVariable,
Ast.Field(evalUnwinder, EvalUnwinder.ReturnValueField)
)
),
Ast.IfThen(Ast.TypeEqual(resultVariable, typeof(BlockReturnResult)),
Ast.IfThenElse(Methods.IsRetrySingleton.OpCall(resultVariable),
// retry:
AstUtils.IfThenElse(Ast.Equal(gen.MakeMethodBlockParameterRead(), blockArgVariable),
RetryStatement.TransformRetry(gen),
Ast.Goto(retryLabel)
),
// return:
gen.Return(ReturnStatement.Propagate(gen, resultVariable))
)
),
resultVariable
};
return result;
}
internal override MSA.Expression TransformDefinedCondition(AstGenerator /*!*/ gen)
{
// block_given semantics:
return(Ast.NotEqual(gen.MakeMethodBlockParameterRead(), Ast.Constant(null)));
}
internal override MSA.Expression/*!*/ TransformRead(AstGenerator/*!*/ gen) {
// variable assigned to the transformed block in MakeCallWithBlockRetryable:
MSA.Expression blockArgVariable = gen.CurrentScope.DefineHiddenVariable("#super-call-block", typeof(Proc));
// invoke super member action:
var siteBuilder = new CallSiteBuilder(gen, gen.CurrentSelfVariable, blockArgVariable);
// arguments:
if (HasImplicitArguments) {
// MRI 1.8: If a block is called via define_method stub its parameters are used here.
// MRI 1.9: This scenario is not supported.
// We don't support this either. Otherwise we would need to emit super call with dynamic parameters if gen.CurrentBlock != null.
if (gen.CurrentMethod.Parameters != null) {
gen.CurrentMethod.Parameters.TransformForSuperCall(gen, siteBuilder);
} else if (gen.CompilerOptions.TopLevelParameterNames != null) {
bool hasUnsplat = gen.CompilerOptions.TopLevelHasUnsplatParameter;
string[] names = gen.CompilerOptions.TopLevelParameterNames;
// dynamic lookup:
for (int i = 0; i < names.Length - (hasUnsplat ? 1 : 0); i++) {
siteBuilder.Add(Methods.GetLocalVariable.OpCall(gen.CurrentScopeVariable, AstUtils.Constant(names[i])));
}
if (hasUnsplat) {
siteBuilder.SplattedArgument =
Methods.GetLocalVariable.OpCall(gen.CurrentScopeVariable, AstUtils.Constant(names[names.Length - 1]));
}
} else {
// this means we are not inside any method scope -> an exception will be thrown at the call site
}
} else {
Arguments.TransformToCall(gen, siteBuilder);
}
// block:
MSA.Expression transformedBlock;
if (Block != null) {
transformedBlock = Block.Transform(gen);
} else {
transformedBlock = gen.MakeMethodBlockParameterRead();
}
return gen.DebugMark(
MethodCall.MakeCallWithBlockRetryable(gen,
siteBuilder.MakeSuperCallAction(gen.CurrentFrame.UniqueId, HasImplicitArguments),
blockArgVariable,
transformedBlock,
Block != null && Block.IsDefinition
),
"#RB: super call ('" + gen.CurrentMethod.MethodName + "')"
);
}
internal override MSA.Expression TransformDefinedCondition(AstGenerator/*!*/ gen) {
// block_given semantics:
return Ast.NotEqual(gen.MakeMethodBlockParameterRead(), AstUtils.Constant(null));
}
internal override MSA.Expression /*!*/ TransformRead(AstGenerator /*!*/ gen)
{
// variable assigned to the transformed block in MakeCallWithBlockRetryable:
MSA.Expression blockArgVariable = gen.CurrentScope.DefineHiddenVariable("#super-call-block", typeof(Proc));
// invoke super member action:
var siteBuilder = new CallSiteBuilder(gen, gen.CurrentSelfVariable, blockArgVariable);
// arguments:
if (HasImplicitArguments)
{
// MRI 1.8: If a block is called via define_method stub its parameters are used here.
// MRI 1.9: This scenario is not supported.
// We don't support this either. Otherwise we would need to emit super call with dynamic parameters if gen.CurrentBlock != null.
if (gen.CurrentMethod.Parameters != null)
{
gen.CurrentMethod.Parameters.TransformForSuperCall(gen, siteBuilder);
}
else if (gen.CompilerOptions.TopLevelParameterNames != null)
{
bool hasUnsplat = gen.CompilerOptions.TopLevelHasUnsplatParameter;
string[] names = gen.CompilerOptions.TopLevelParameterNames;
// dynamic lookup:
for (int i = 0; i < names.Length - (hasUnsplat ? 1 : 0); i++)
{
siteBuilder.Add(Methods.GetLocalVariable.OpCall(gen.CurrentScopeVariable, AstUtils.Constant(names[i])));
}
if (hasUnsplat)
{
siteBuilder.SplattedArgument =
Methods.GetLocalVariable.OpCall(gen.CurrentScopeVariable, AstUtils.Constant(names[names.Length - 1]));
}
}
else
{
// this means we are not inside any method scope -> an exception will be thrown at the call site
}
}
else
{
Arguments.TransformToCall(gen, siteBuilder);
}
// block:
MSA.Expression transformedBlock;
if (Block != null)
{
transformedBlock = Block.Transform(gen);
}
else
{
transformedBlock = gen.MakeMethodBlockParameterRead();
}
return(gen.DebugMark(
MethodCall.MakeCallWithBlockRetryable(gen,
siteBuilder.MakeSuperCallAction(gen.CurrentFrame.UniqueId, HasImplicitArguments),
blockArgVariable,
transformedBlock,
Block != null && Block.IsDefinition
),
"#RB: super call ('" + gen.CurrentMethod.MethodName + "')"
));
}
internal static MSA.Expression/*!*/ MakeCallWithBlockRetryable(AstGenerator/*!*/ gen, MSA.Expression/*!*/ invoke,
MSA.Expression blockArgVariable, MSA.Expression transformedBlock, bool isBlockDefinition) {
Assert.NotNull(invoke);
Debug.Assert((blockArgVariable == null) == (transformedBlock == null));
// see Ruby Language.doc/Control Flow Implementation/Method Call With a Block
MSA.Expression resultVariable = gen.CurrentScope.DefineHiddenVariable("#method-result", typeof(object));
MSA.ParameterExpression evalUnwinder = gen.CurrentScope.DefineHiddenVariable("#unwinder", typeof(EvalUnwinder));
MSA.LabelTarget label = Ast.Label();
return AstFactory.Block(
Ast.Assign(blockArgVariable, Ast.Convert(transformedBlock, blockArgVariable.Type)),
AstFactory.Infinite(label, null,
(!isBlockDefinition) ?
(MSA.Expression)Ast.Empty() :
(MSA.Expression)Methods.InitializeBlock.OpCall(blockArgVariable),
AstUtils.Try(
Ast.Assign(resultVariable, invoke)
).Catch(evalUnwinder,
Ast.Assign(
resultVariable,
Ast.Field(evalUnwinder, EvalUnwinder.ReturnValueField)
)
),
// if result != RetrySingleton then break end
AstUtils.Unless(Methods.IsRetrySingleton.OpCall(AstFactory.Box(resultVariable)), Ast.Break(label)),
// if blockParam == #block then retry end
(gen.CurrentMethod.IsTopLevelCode) ? Ast.Empty() :
AstUtils.IfThen(Ast.Equal(gen.MakeMethodBlockParameterRead(), blockArgVariable), RetryStatement.TransformRetry(gen))
),
resultVariable
);
}