| public static Box ( Expression expression ) : Expression | ||
| expression | Expression | |
| Результат | Expression | |
// see Ruby Language.doc/Runtime/Control Flow Implementation/Next
internal override MSA.Expression /*!*/ Transform(AstGenerator /*!*/ gen)
{
MSA.Expression transformedReturnValue = TransformReturnValue(gen);
// eval:
if (gen.CompilerOptions.IsEval)
{
return(Methods.EvalNext.OpCall(gen.CurrentScopeVariable, AstUtils.Box(transformedReturnValue)));
}
// loop:
if (gen.CurrentLoop != null)
{
return(Ast.Block(
transformedReturnValue, // evaluate for side-effects
Ast.Continue(gen.CurrentLoop.ContinueLabel),
AstUtils.Empty()
));
}
// block:
if (gen.CurrentBlock != null)
{
return(gen.Return(transformedReturnValue));
}
// method:
return(Methods.MethodNext.OpCall(gen.CurrentScopeVariable, AstUtils.Box(transformedReturnValue)));
}
internal override MSA.Expression /*!*/ TransformRead(AstGenerator /*!*/ gen)
{
if (_value != null)
{
return(Ast.Block(
AstUtils.IfThen(
_condition.TransformReadBoolean(gen, !_negateCondition),
_jumpStatement.Transform(gen)
),
_value.TransformRead(gen)
));
}
else
{
MSA.Expression tmpVariable = gen.CurrentScope.DefineHiddenVariable("#tmp_cond", typeof(object));
return(Ast.Block(
Ast.Assign(tmpVariable, AstUtils.Box(_condition.TransformRead(gen))),
AstUtils.IfThen(
(_negateCondition ? Methods.IsFalse : Methods.IsTrue).OpCall(tmpVariable),
_jumpStatement.Transform(gen)
),
tmpVariable
));
}
}
// see Ruby Language.doc/Runtime/Control Flow Implementation/Break
internal override MSA.Expression /*!*/ Transform(AstGenerator /*!*/ gen)
{
MSA.Expression transformedReturnValue = TransformReturnValue(gen);
// eval:
if (gen.CompilerOptions.IsEval)
{
return(Methods.EvalBreak.OpCall(gen.CurrentScopeVariable, AstUtils.Box(transformedReturnValue)));
}
// loop:
if (gen.CurrentLoop != null)
{
return(Ast.Block(
Ast.Assign(
gen.CurrentLoop.ResultVariable,
Ast.Convert(transformedReturnValue, gen.CurrentLoop.ResultVariable.Type)
),
Ast.Break(gen.CurrentLoop.BreakLabel),
AstUtils.Empty()
));
}
// block:
if (gen.CurrentBlock != null)
{
return(gen.Return(Methods.BlockBreak.OpCall(gen.CurrentBlock.BfcVariable, AstUtils.Box(transformedReturnValue))));
}
// primary frame:
return(Methods.MethodBreak.OpCall(AstUtils.Box(transformedReturnValue)));
}
private MSA.Expression /*!*/ MakeExpressionQualifiedRead(AstGenerator /*!*/ gen, int opKind, string /*!*/[] /*!*/ names)
{
Debug.Assert(_qualifier != null && !(_qualifier is ConstantVariable));
object siteCache;
MethodInfo op;
if (opKind == OpIsDefined)
{
siteCache = new ExpressionQualifiedIsDefinedConstantSiteCache();
op = Methods.IsDefinedExpressionQualifiedConstant;
}
else
{
siteCache = new ExpressionQualifiedConstantSiteCache();
op = Methods.GetExpressionQualifiedConstant;
}
var result = op.OpCall(
AstUtils.Box(_qualifier.TransformRead(gen)),
gen.CurrentScopeVariable,
Ast.Constant(siteCache),
Ast.Constant(names)
);
return(opKind == OpIsDefined?Ast.TryCatch(result, Ast.Catch(typeof(Exception), AstFactory.False)) : result);
}
// when [<expr>, ...] *<array>
private static MSA.Expression /*!*/ MakeArrayTest(AstGenerator /*!*/ gen, MSA.Expression /*!*/ array, MSA.Expression value)
{
return(Methods.ExistsUnsplat.OpCall(
Ast.Constant(CallSite <Func <CallSite, object, object, object> > .Create(
RubyCallAction.Make(gen.Context, "===", RubyCallSignature.WithImplicitSelf(2))
)),
AstUtils.LightDynamic(ConvertToArraySplatAction.Make(gen.Context), array),
AstUtils.Box(value)
));
}
public static MSA.Expression /*!*/ IsFalse(MSA.Expression /*!*/ expression)
{
if (expression.Type == typeof(bool))
{
return(Ast.Not(expression));
}
else
{
return(Methods.IsFalse.OpCall(AstUtils.Box(expression)));
}
}
internal override MSA.Expression /*!*/ TransformWriteVariable(AstGenerator /*!*/ gen, MSA.Expression /*!*/ rightValue)
{
if (_definitionLexicalDepth >= 0)
{
// static lookup:
return(Ast.Assign(gen.CurrentScope.GetVariableAccessor(_definitionLexicalDepth, _closureIndex), AstUtils.Box(rightValue)));
}
else
{
// dynamic lookup:
return(Methods.SetLocalVariable.OpCall(AstUtils.Box(rightValue), gen.CurrentScopeVariable, AstUtils.Constant(Name)));
}
}
internal static MSA.Expression /*!*/ TransformRead(AstGenerator /*!*/ gen, MSA.Expression /*!*/ left, MSA.Expression /*!*/ right)
{
MSA.ParameterExpression temp;
MSA.Expression result = AstUtils.CoalesceTrue(
AstUtils.Box(left),
AstUtils.Box(right),
Methods.IsTrue,
out temp
);
gen.CurrentScope.AddHidden(temp);
return(result);
}
private static RuleGenerator /*!*/ CreateSetter(int index)
{
return(delegate(MetaObjectBuilder /*!*/ metaBuilder, CallArguments /*!*/ args, string /*!*/ name) {
var actualArgs = RubyOverloadResolver.NormalizeArguments(metaBuilder, args, 1, 1);
if (!metaBuilder.Error)
{
metaBuilder.Result = Methods.RubyStruct_SetValue.OpCall(
Ast.Convert(args.TargetExpression, typeof(RubyStruct)),
AstUtils.Constant(index),
AstUtils.Box(actualArgs[0].Expression)
);
}
});
}
internal static void BuildConversion(MetaObjectBuilder /*!*/ metaBuilder, CallArguments /*!*/ args)
{
const string ToS = "to_s";
if (TryImplicitConversion(metaBuilder, args))
{
metaBuilder.AddTypeRestriction(args.Target.GetType(), args.TargetExpression);
return;
}
RubyMemberInfo conversionMethod, methodMissing = null;
RubyClass targetClass = args.RubyContext.GetImmediateClassOf(args.Target);
using (targetClass.Context.ClassHierarchyLocker()) {
metaBuilder.AddTargetTypeTest(args.Target, targetClass, args.TargetExpression, args.MetaContext,
new[] { ToS, Symbols.MethodMissing }
);
conversionMethod = targetClass.ResolveMethodForSiteNoLock(ToS, VisibilityContext.AllVisible).Info;
// find method_missing - we need to add "to_s" method to the missing methods table:
if (conversionMethod == null)
{
methodMissing = targetClass.ResolveMethodMissingForSite(ToS, RubyMethodVisibility.None);
}
}
// invoke target.to_s and if successful convert the result to string unless it is already:
if (conversionMethod != null)
{
conversionMethod.BuildCall(metaBuilder, args, ToS);
}
else
{
RubyCallAction.BuildMethodMissingCall(metaBuilder, args, ToS, methodMissing, RubyMethodVisibility.None, false, true);
}
if (metaBuilder.Error)
{
return;
}
metaBuilder.Result = Methods.ToSDefaultConversion.OpCall(
AstUtils.Convert(args.MetaContext.Expression, typeof(RubyContext)),
AstUtils.Box(args.TargetExpression),
AstUtils.Box(metaBuilder.Result)
);
}
internal static MSA.Expression /*!*/ YieldExpression(
RubyContext /*!*/ context,
ICollection <MSA.Expression> /*!*/ arguments,
MSA.Expression splattedArgument,
MSA.Expression rhsArgument,
MSA.Expression blockArgument,
MSA.Expression /*!*/ bfcVariable,
MSA.Expression /*!*/ selfArgument)
{
Assert.NotNull(arguments, bfcVariable, selfArgument);
bool hasArgumentArray;
var opMethod = Methods.Yield(arguments.Count, splattedArgument != null, rhsArgument != null, out hasArgumentArray);
var args = new AstExpressions();
foreach (var arg in arguments)
{
args.Add(AstUtils.Box(arg));
}
if (hasArgumentArray)
{
args = new AstExpressions {
Ast.NewArrayInit(typeof(object), args)
};
}
if (splattedArgument != null)
{
args.Add(AstUtils.LightDynamic(ExplicitSplatAction.Make(context), typeof(IList), splattedArgument));
}
if (rhsArgument != null)
{
args.Add(AstUtils.Box(rhsArgument));
}
args.Add(blockArgument != null ? AstUtils.Convert(blockArgument, typeof(Proc)) : AstFactory.NullOfProc);
args.Add(AstUtils.Box(selfArgument));
args.Add(bfcVariable);
return(Ast.Call(opMethod, args));
}
internal override MSA.Expression /*!*/ TransformWriteVariable(AstGenerator /*!*/ gen, MSA.Expression /*!*/ rightValue)
{
MSA.Expression transformedName = TransformName(gen);
MSA.Expression transformedQualifier;
switch (TransformQualifier(gen, out transformedQualifier))
{
case StaticScopeKind.Global:
return(Methods.SetGlobalConstant.OpCall(AstUtils.Box(rightValue), gen.CurrentScopeVariable, transformedName));
case StaticScopeKind.EnclosingModule:
return(Methods.SetUnqualifiedConstant.OpCall(AstUtils.Box(rightValue), gen.CurrentScopeVariable, transformedName));
case StaticScopeKind.Explicit:
return(Methods.SetQualifiedConstant.OpCall(AstUtils.Box(rightValue), transformedQualifier, gen.CurrentScopeVariable, transformedName));
}
throw Assert.Unreachable;
}
/// <code>
/// End-exclusive range:
/// if state
/// state = IsFalse({end})
/// true
/// else
/// state = IsTrue({begin})
/// end
///
/// End-inclusive range:
/// if state || IsTrue({begin})
/// state = IsFalse({end})
/// true
/// else
/// false
/// end
/// </code>
internal override MSA.Expression /*!*/ TransformRead(AstGenerator /*!*/ gen)
{
var begin = AstUtils.Box(_range.Begin.TransformRead(gen));
var end = AstUtils.Box(_range.End.TransformRead(gen));
// state:
// false <=> null
// true <=> non-null
if (_range.IsExclusive)
{
return(Ast.Condition(
Ast.ReferenceNotEqual(
_stateVariable.TransformReadVariable(gen, false),
AstUtils.Constant(null)
),
Ast.Block(
_stateVariable.TransformWriteVariable(gen, Methods.NullIfTrue.OpCall(end)),
AstUtils.Constant(true)
),
Ast.ReferenceNotEqual(
_stateVariable.TransformWriteVariable(gen, Methods.NullIfFalse.OpCall(begin)),
AstUtils.Constant(null)
)
));
}
else
{
return(Ast.Condition(
Ast.OrElse(
Ast.ReferenceNotEqual(
_stateVariable.TransformReadVariable(gen, false),
AstUtils.Constant(null)
),
Methods.IsTrue.OpCall(begin)
),
Ast.Block(
_stateVariable.TransformWriteVariable(gen, Methods.NullIfTrue.OpCall(end)),
AstUtils.Constant(true)
),
AstUtils.Constant(false)
));
}
}
internal override MSA.Expression /*!*/ TransformRead(AstGenerator /*!*/ gen)
{
int intBegin, intEnd;
if (IsIntegerRange(out intBegin, out intEnd))
{
return((_isExclusive ? Methods.CreateExclusiveIntegerRange : Methods.CreateInclusiveIntegerRange).OpCall(
AstUtils.Constant(intBegin), AstUtils.Constant(intEnd)
));
}
else
{
return((_isExclusive ? Methods.CreateExclusiveRange : Methods.CreateInclusiveRange).OpCall(
AstUtils.Box(_begin.TransformRead(gen)),
AstUtils.Box(_end.TransformRead(gen)),
gen.CurrentScopeVariable,
AstUtils.Constant(new BinaryOpStorage(gen.Context))
));
}
}
internal override MSA.Expression /*!*/ MakeDefinitionExpression(AstGenerator /*!*/ gen)
{
MSA.Expression transformedQualifier;
MSA.Expression name = QualifiedName.TransformName(gen);
MSA.Expression transformedSuper = (_superClass != null) ? AstUtils.Box(_superClass.TransformRead(gen)) : AstUtils.Constant(null);
switch (QualifiedName.TransformQualifier(gen, out transformedQualifier))
{
case StaticScopeKind.Global:
return(Methods.DefineGlobalClass.OpCall(gen.CurrentScopeVariable, name, transformedSuper));
case StaticScopeKind.EnclosingModule:
return(Methods.DefineNestedClass.OpCall(gen.CurrentScopeVariable, name, transformedSuper));
case StaticScopeKind.Explicit:
return(Methods.DefineClass.OpCall(gen.CurrentScopeVariable, transformedQualifier, name, transformedSuper));
}
throw Assert.Unreachable;
}
internal override void BuildCallNoFlow(MetaObjectBuilder /*!*/ metaBuilder, CallArguments /*!*/ args, string /*!*/ name)
{
Assert.NotNull(metaBuilder, args, name);
// 2 implicit args: self, block
var argsBuilder = new ArgsBuilder(2, Parameters.Mandatory.Length, Parameters.LeadingMandatoryCount, Parameters.Optional.Length, Parameters.Unsplat != null);
argsBuilder.SetImplicit(0, AstUtils.Box(args.TargetExpression));
argsBuilder.SetImplicit(1, args.Signature.HasBlock ? AstUtils.Convert(args.GetBlockExpression(), typeof(Proc)) : AstFactory.NullOfProc);
argsBuilder.AddCallArguments(metaBuilder, args);
if (metaBuilder.Error)
{
return;
}
// box explicit arguments:
var boxedArguments = argsBuilder.GetArguments();
for (int i = 2; i < boxedArguments.Length; i++)
{
boxedArguments[i] = AstUtils.Box(boxedArguments[i]);
}
var method = GetDelegate();
if (method.GetType() == ParamsArrayDelegateType)
{
// Func<object, Proc, object[], object>
metaBuilder.Result = AstFactory.CallDelegate(method, new[] {
boxedArguments[0],
boxedArguments[1],
Ast.NewArrayInit(typeof(object), ArrayUtils.ShiftLeft(boxedArguments, 2))
});
}
else
{
metaBuilder.Result = AstFactory.CallDelegate(method, boxedArguments);
}
}
// when <expr>
// generates into:
// RubyOps.IsTrue(<expr>) if the case has no value, otherise:
// RubyOps.IsTrue(Call("===", <expr>, <value>))
private static MSA.Expression /*!*/ MakeTest(AstGenerator /*!*/ gen, Expression /*!*/ expr, MSA.Expression value)
{
MSA.Expression transformedExpr = expr.TransformRead(gen);
if (expr is SplattedArgument)
{
if (value != null)
{
return(Methods.ExistsUnsplatCompare.OpCall(
Ast.Constant(CallSite <Func <CallSite, object, object, object> > .Create(
RubyCallAction.Make(gen.Context, "===", RubyCallSignature.WithImplicitSelf(2))
)),
AstUtils.LightDynamic(ExplicitTrySplatAction.Make(gen.Context), transformedExpr),
AstUtils.Box(value)
));
}
else
{
return(Methods.ExistsUnsplat.OpCall(
AstUtils.LightDynamic(ExplicitTrySplatAction.Make(gen.Context), transformedExpr)
));
}
}
else
{
if (value != null)
{
return(AstFactory.IsTrue(
CallSiteBuilder.InvokeMethod(gen.Context, "===", RubyCallSignature.WithScope(1),
gen.CurrentScopeVariable,
transformedExpr,
value
)
));
}
else
{
return(AstFactory.IsTrue(transformedExpr));
}
}
}
internal MSA.Expression UnsplatArguments(AstGenerator /*!*/ gen, int start)
{
// [*array] == array, [*item] = [item]
if (start == _expressions.Length - 1)
{
return(Methods.Unsplat.OpCall(AstUtils.Box(_expressions[start].TransformRead(gen))));
}
MSA.Expression array = Methods.MakeArray0.OpCall();
for (int i = start; i < _expressions.Length; i++)
{
if (_expressions[i] is SplattedArgument)
{
array = Methods.AddRange.OpCall(array, _expressions[i].TransformRead(gen));
}
else
{
array = Methods.AddItem.OpCall(array, AstUtils.Box(_expressions[i].TransformRead(gen)));
}
}
return(array);
}
public static MSA.Expression /*!*/ Condition(MSA.Expression /*!*/ test, MSA.Expression /*!*/ ifTrue, MSA.Expression /*!*/ ifFalse)
{
Assert.NotNull(test, ifTrue, ifFalse);
Debug.Assert(test.Type == typeof(bool));
if (ifTrue.Type != ifFalse.Type)
{
if (ifTrue.Type.IsAssignableFrom(ifFalse.Type))
{
ifFalse = Ast.Convert(ifFalse, ifTrue.Type);
}
else if (ifFalse.Type.IsAssignableFrom(ifTrue.Type))
{
ifTrue = Ast.Convert(ifTrue, ifFalse.Type);
}
else
{
ifTrue = AstUtils.Box(ifTrue);
ifFalse = AstUtils.Box(ifFalse);
}
}
return(Ast.Condition(test, ifTrue, ifFalse));
}
private MSA.Expression /*!*/ MakeCompareException(AstGenerator /*!*/ gen, MSA.Expression /*!*/ comparisonSiteStorage, MSA.Expression /*!*/ expression, bool isSplatted)
{
if (isSplatted)
{
return(Methods.CompareSplattedExceptions.OpCall(comparisonSiteStorage, gen.CurrentScopeVariable, expression));
}
else
{
return(Methods.CompareException.OpCall(comparisonSiteStorage, gen.CurrentScopeVariable, AstUtils.Box(expression)));
}
}
private MSA.Expression /*!*/ MakeCompareException(AstGenerator /*!*/ gen, MSA.Expression /*!*/ comparisonSiteStorage, MSA.Expression /*!*/ expression)
{
return(Methods.CompareException.OpCall(comparisonSiteStorage, gen.CurrentScopeVariable, AstUtils.Box(expression)));
}
public void AddCallArguments(MetaObjectBuilder /*!*/ metaBuilder, CallArguments /*!*/ args)
{
_callArguments = args;
// calculate actual argument count:
_actualArgumentCount = args.SimpleArgumentCount;
if (args.Signature.HasSplattedArgument)
{
var splattedArg = args.GetSplattedMetaArgument();
metaBuilder.AddSplattedArgumentTest((IList)splattedArg.Value, splattedArg.Expression, out _listLength, out _listVariable);
_actualArgumentCount += _listLength;
}
if (args.Signature.HasRhsArgument)
{
_actualArgumentCount++;
}
// check:
if (HasTooFewArguments)
{
metaBuilder.SetWrongNumberOfArgumentsError(_actualArgumentCount, _mandatoryParamCount);
return;
}
if (HasTooManyArguments)
{
metaBuilder.SetWrongNumberOfArgumentsError(_actualArgumentCount, _mandatoryParamCount);
return;
}
bool isSplatted;
// leading mandatory:
for (int i = 0; i < _leadingMandatoryParamCount; i++)
{
_arguments[LeadingMandatoryIndex + i] = GetArgument(i, out isSplatted);
}
// trailing mandatory:
for (int i = 0; i < TrailingMandatoryCount; i++)
{
_arguments[TrailingMandatoryIndex + i] = GetArgument(_actualArgumentCount - TrailingMandatoryCount + i, out isSplatted);
}
int start = _leadingMandatoryParamCount;
int end = _actualArgumentCount - TrailingMandatoryCount;
// optional:
for (int i = 0; i < _optionalParamCount; i++)
{
_arguments[OptionalParameterIndex + i] = (start < end) ? GetArgument(start++, out isSplatted) : Ast.Field(null, Fields.DefaultArgument);
}
// unsplat:
if (_hasUnsplatParameter)
{
Expression array;
if (args.Signature.HasSplattedArgument)
{
// simple:
var argsToUnsplat = new List <Expression>();
while (start < end)
{
var arg = GetArgument(start, out isSplatted);
if (isSplatted)
{
break;
}
argsToUnsplat.Add(AstUtils.Box(arg));
start++;
}
array = Methods.MakeArrayOpCall(argsToUnsplat);
int rangeStart = start - args.SimpleArgumentCount;
int rangeLength = Math.Min(end - start, _listLength - rangeStart);
// splatted:
if (rangeLength > 0)
{
array = Methods.AddSubRange.OpCall(array, _listVariable, Ast.Constant(rangeStart), Ast.Constant(rangeLength));
start += rangeLength;
}
// rhs:
while (start < end)
{
array = Methods.AddItem.OpCall(array, AstUtils.Box(GetArgument(start, out isSplatted)));
start++;
}
}
else
{
var argsToUnsplat = new List <Expression>(end - start);
while (start < end)
{
argsToUnsplat.Add(AstUtils.Box(GetArgument(start++, out isSplatted)));
}
array = Methods.MakeArrayOpCall(argsToUnsplat);
}
_arguments[UnsplatParameterIndex] = array;
}
_callArguments = null;
_listVariable = null;
Debug.Assert(CollectionUtils.TrueForAll(_arguments, (e) => e != null));
}
/// <summary>
/// Transform as expression whose value is read as Boolean.
/// </summary>
internal virtual MSA.Expression /*!*/ TransformReadBoolean(AstGenerator /*!*/ gen, bool positive)
{
return((positive ? Methods.IsTrue : Methods.IsFalse).OpCall(AstUtils.Box(TransformRead(gen))));
}
internal override MSA.Expression /*!*/ TransformWriteVariable(AstGenerator /*!*/ gen, MSA.Expression /*!*/ rightValue)
{
return(Methods.SetInstanceVariable.OpCall(gen.CurrentSelfVariable, AstUtils.Box(rightValue), gen.CurrentScopeVariable, AstUtils.Constant(Name)));
}
