public ISymbolValue Visit(TemplateInstanceExpression tix)
{
var ImplicitlyExecute = this.ImplicitlyExecute;
this.ImplicitlyExecute = true;
return(TryDoCTFEOrGetValueRefs(AmbiguousType.Get(ExpressionTypeEvaluation.GetOverloads(tix, ctxt), tix), tix, ImplicitlyExecute));
}
public AbstractType TryGetDType(IDBacktraceSymbol s)
{
if (!s.HasParent)
{
TryUpdateStackFrameInfo();
if (ctxt == null)
{
return(null);
}
return(AmbiguousType.Get(ExpressionTypeEvaluation.GetOverloads(new IdentifierExpression(s.Name), ctxt, null)));
}
return(null);
}
public AbstractType Visit(PostfixExpression_Slice x)
{
var foreExpression = EvalForeExpression(x);
// myArray[0]; myArray[0..5];
if (foreExpression is MemberSymbol)
{
foreExpression = DResolver.StripMemberSymbols(foreExpression);
}
var udt = foreExpression as UserDefinedType;
if (udt == null)
{
return(foreExpression);
}
AbstractType[] sliceArgs;
if (x.FromExpression == null && x.ToExpression == null)
{
sliceArgs = null;
}
else
{
sliceArgs = new AbstractType[2];
if (x.FromExpression != null)
{
sliceArgs[0] = x.FromExpression.Accept(this);
}
if (x.ToExpression != null)
{
sliceArgs[1] = x.ToExpression.Accept(this);
}
}
ctxt.CurrentContext.IntroduceTemplateParameterTypes(udt);
var overloads = TypeDeclarationResolver.ResolveFurtherTypeIdentifier(OpSliceIdHash, AmbiguousType.TryDissolve(foreExpression), ctxt, x, false);
overloads = TemplateInstanceHandler.DeduceParamsAndFilterOverloads(overloads, sliceArgs, true, ctxt);
ctxt.CurrentContext.RemoveParamTypesFromPreferredLocals(udt);
return(TryPretendMethodExecution(AmbiguousType.Get(overloads, x), x, sliceArgs) ?? foreExpression);
}
/// <summary>
/// Returns either all unfiltered and undeduced overloads of a member of a base type/value (like b from type a if the expression is a.b).
/// if <param name="EvalAndFilterOverloads"></param> is false.
/// If true, all overloads will be deduced, filtered and evaluated, so that (in most cases,) a one-item large array gets returned
/// which stores the return value of the property function b that is executed without arguments.
/// Also handles UFCS - so if filtering is wanted, the function becom
/// </summary>
public static R[] EvalPostfixAccessExpression <R>(ExpressionVisitor <R> vis, ResolutionContext ctxt, PostfixExpression_Access acc,
ISemantic resultBase = null, bool EvalAndFilterOverloads = true, bool ResolveImmediateBaseType = true, AbstractSymbolValueProvider ValueProvider = null)
where R : class, ISemantic
{
if (acc == null)
{
return(null);
}
var baseExpression = resultBase ?? (acc.PostfixForeExpression != null ? acc.PostfixForeExpression.Accept(vis) as ISemantic : null);
if (acc.AccessExpression is NewExpression)
{
/*
* This can be both a normal new-Expression as well as an anonymous class declaration!
*/
//TODO!
return(null);
}
AbstractType[] overloads;
var optBackup = ctxt.CurrentContext.ContextDependentOptions;
if (acc.AccessExpression is TemplateInstanceExpression)
{
if (!ResolveImmediateBaseType)
{
ctxt.CurrentContext.ContextDependentOptions |= ResolutionOptions.DontResolveBaseTypes;
}
var tix = (TemplateInstanceExpression)acc.AccessExpression;
// Do not deduce and filter if superior expression is a method call since call arguments' types also count as template arguments!
overloads = ExpressionTypeEvaluation.GetOverloads(tix, ctxt, new[] { AbstractType.Get(baseExpression) }, EvalAndFilterOverloads);
if (!ResolveImmediateBaseType)
{
ctxt.CurrentContext.ContextDependentOptions = optBackup;
}
}
else if (acc.AccessExpression is IdentifierExpression)
{
var id = acc.AccessExpression as IdentifierExpression;
if (ValueProvider != null && EvalAndFilterOverloads && baseExpression != null)
{
var staticPropResult = StaticProperties.TryEvalPropertyValue(ValueProvider, baseExpression, id.ValueStringHash);
if (staticPropResult != null)
{
return new[] { (R)staticPropResult }
}
;
}
if (!ResolveImmediateBaseType)
{
ctxt.CurrentContext.ContextDependentOptions |= ResolutionOptions.DontResolveBaseTypes;
}
overloads = ExpressionTypeEvaluation.GetOverloads(id, ctxt, AmbiguousType.TryDissolve(AbstractType.Get(baseExpression)), EvalAndFilterOverloads);
if (!ResolveImmediateBaseType)
{
ctxt.CurrentContext.ContextDependentOptions = optBackup;
}
}
else
{ /*
* if (eval){
* EvalError(acc, "Invalid access expression");
* return null;
* }*/
ctxt.LogError(acc, "Invalid post-dot expression");
return(null);
}
// If evaluation active and the access expression is stand-alone, return a single item only.
if (EvalAndFilterOverloads && ValueProvider != null)
{
return new[] { (R) new Evaluation(ValueProvider).TryDoCTFEOrGetValueRefs(AmbiguousType.Get(overloads, acc.AccessExpression), acc.AccessExpression) }
}
;
return(overloads as R[]);
}
ISymbolValue EvalForeExpression(PostfixExpression ex)
{
return(ex.PostfixForeExpression != null?ex.PostfixForeExpression.Accept(this) : null);
}
public static AbstractType EvalMethodCall(AbstractType[] baseExpression, ISymbolValue baseValue, TemplateInstanceExpression tix,
ResolutionContext ctxt,
PostfixExpression_MethodCall call, out List <ISemantic> callArguments, out ISymbolValue delegateValue,
bool returnBaseTypeOnly, AbstractSymbolValueProvider ValueProvider = null)
{
//TODO: Refactor this crap!
delegateValue = null;
callArguments = null;
var methodOverloads = new List <AbstractType>();
#region Search possible methods, opCalls or delegates that could be called
bool requireStaticItems = true; //TODO: What if there's an opCall and a foreign method at the same time? - and then this variable would be bullshit
IEnumerable <AbstractType> scanResults = baseExpression;
var nextResults = new List <AbstractType>();
while (scanResults != null)
{
foreach (var b in scanResults)
{
if (b is AmbiguousType)
{
nextResults.AddRange((b as AmbiguousType).Overloads);
}
else if (b is TemplateParameterSymbol)
{
nextResults.Add((b as TemplateParameterSymbol).Base);
}
else if (b is MemberSymbol)
{
var mr = (MemberSymbol)b;
if (mr.Definition is DMethod)
{
methodOverloads.Add(mr);
continue;
}
else if (mr.Definition is DVariable)
{
// If we've got a variable here, get its base type/value reference
if (ValueProvider != null)
{
var dgVal = ValueProvider[(DVariable)mr.Definition] as DelegateValue;
if (dgVal != null)
{
nextResults.Add(dgVal.Definition);
continue;
}
else
{
ValueProvider.LogError(call, "Variable must be a delegate, not anything else");
return(null);
}
}
else
{
var bt = mr.Base ?? TypeDeclarationResolver.ResolveSingle(mr.Definition.Type, ctxt);
// Must be of type delegate
if (bt is DelegateType)
{
var ret = HandleCallDelegateType(ValueProvider, bt as DelegateType, methodOverloads, returnBaseTypeOnly);
if (ret is ISymbolValue)
{
delegateValue = ret as ISymbolValue;
return(null);
}
else if (ret is AbstractType)
{
return(ret as AbstractType);
}
}
else
{
/*
* If mr.Node is not a method, so e.g. if it's a variable
* pointing to a delegate
*
* class Foo
* {
* string opCall() { return "asdf"; }
* }
*
* Foo f=new Foo();
* f(); -- calls opCall, opCall is not static
*/
nextResults.Add(bt);
requireStaticItems = false;
}
//TODO: Can other types work as function/are callable?
}
}
}
else if (b is DelegateType)
{
var ret = HandleCallDelegateType(ValueProvider, b as DelegateType, methodOverloads, returnBaseTypeOnly);
if (ret is ISymbolValue)
{
delegateValue = ret as ISymbolValue;
return(null);
}
else if (ret is AbstractType)
{
return(ret as AbstractType);
}
}
else if (b is ClassType || b is StructType)
{
var tit = (TemplateIntermediateType)b;
/*
* auto a = MyStruct(); -- opCall-Overloads can be used
*/
var classDef = tit.Definition;
if (classDef == null)
{
continue;
}
foreach (var i in ExpressionTypeEvaluation.GetOpCalls(tit, requireStaticItems))
{
methodOverloads.Add(TypeDeclarationResolver.HandleNodeMatch(i, ctxt, b, call) as MemberSymbol);
}
/*
* Every struct can contain a default ctor:
*
* struct S { int a; bool b; }
*
* auto s = S(1,true); -- ok
* auto s2= new S(2,false); -- error, no constructor found!
*/
if (b is StructType && methodOverloads.Count == 0)
{
//TODO: Deduce parameters
return(b);
}
}
/*
* If the overload is a template, it quite exclusively means that we'll handle a method that is the only
* child inside a template + that is named as the template.
*/
else if (b is TemplateType)
{
methodOverloads.Add(b);
}
else if (b is PrimitiveType) // dmd 2.066: Uniform Construction Syntax. creal(3) is of type creal.
{
methodOverloads.Add(b);
}
}
scanResults = nextResults.Count == 0 ? null : nextResults.ToArray();
nextResults.Clear();
}
#endregion
if (methodOverloads.Count == 0)
{
return(null);
}
// Get all arguments' types
callArguments = new List <ISemantic>();
if (call.Arguments != null)
{
if (ValueProvider != null)
{
foreach (var arg in call.Arguments)
{
callArguments.Add(arg != null ? Evaluation.EvaluateValue(arg, ValueProvider) : null);
}
}
else
{
foreach (var arg in call.Arguments)
{
callArguments.Add(arg != null ? ExpressionTypeEvaluation.EvaluateType(arg, ctxt) : null);
}
}
}
#region If explicit template type args were given, try to associate them with each overload
if (tix != null)
{
var args = TemplateInstanceHandler.PreResolveTemplateArgs(tix, ctxt);
var deducedOverloads = TemplateInstanceHandler.DeduceParamsAndFilterOverloads(methodOverloads, args, true, ctxt);
methodOverloads.Clear();
if (deducedOverloads != null)
{
methodOverloads.AddRange(deducedOverloads);
}
}
#endregion
#region Filter by parameter-argument comparison
var argTypeFilteredOverloads = new List <AbstractType>();
bool hasHandledUfcsResultBefore = false;
AbstractType untemplatedMethodResult = null;
foreach (var ov in methodOverloads)
{
if (ov is MemberSymbol)
{
HandleDMethodOverload(ctxt, ValueProvider != null, baseValue, callArguments, returnBaseTypeOnly, argTypeFilteredOverloads, ref hasHandledUfcsResultBefore,
ov as MemberSymbol, ref untemplatedMethodResult);
}
else if (ov is DelegateType)
{
var dg = ov as DelegateType;
var bt = dg.Base ?? TypeDeclarationResolver.GetMethodReturnType(dg, ctxt);
//TODO: Param-Arg check
if (returnBaseTypeOnly)
{
argTypeFilteredOverloads.Add(bt);
}
else
{
if (dg.Base == null)
{
if (dg.IsFunctionLiteral)
{
dg = new DelegateType(bt, dg.DeclarationOrExpressionBase as FunctionLiteral, dg.Parameters);
}
else
{
dg = new DelegateType(bt, dg.DeclarationOrExpressionBase as DelegateDeclaration, dg.Parameters);
}
}
argTypeFilteredOverloads.Add(new DelegateCallSymbol(dg, call));
}
}
else if (ov is PrimitiveType) // dmd 2.066: Uniform Construction Syntax. creal(3) is of type creal.
{
if (ValueProvider != null)
{
if (callArguments == null || callArguments.Count != 1)
{
ValueProvider.LogError(call, "Uniform construction syntax expects exactly one argument");
}
else
{
var pv = callArguments[0] as PrimitiveValue;
if (pv == null)
{
ValueProvider.LogError(call, "Uniform construction syntax expects one built-in scalar value as first argument");
}
else
{
delegateValue = new PrimitiveValue(pv.Value, ov as PrimitiveType, pv.ImaginaryPart);
}
}
}
argTypeFilteredOverloads.Add(ov);
}
}
// Prefer untemplated methods over templated ones
if (untemplatedMethodResult != null)
{
return(untemplatedMethodResult);
}
#endregion
return(AmbiguousType.Get(argTypeFilteredOverloads, tix));
}
public AbstractType Visit(IdentifierExpression id)
{
if (id.IsIdentifier)
{
return(TryPretendMethodExecution(AmbiguousType.Get(GetOverloads(id, ctxt), id)));
}
byte tt;
switch (id.Format)
{
case Parser.LiteralFormat.CharLiteral:
var tk = id.Subformat == LiteralSubformat.Utf32 ? DTokens.Dchar :
id.Subformat == LiteralSubformat.Utf16 ? DTokens.Wchar :
DTokens.Char;
return(new PrimitiveType(tk, 0, id)
{
NonStaticAccess = true
});
case LiteralFormat.FloatingPoint | LiteralFormat.Scalar:
var im = id.Subformat.HasFlag(LiteralSubformat.Imaginary);
tt = im ? DTokens.Idouble : DTokens.Double;
if (id.Subformat.HasFlag(LiteralSubformat.Float))
{
tt = im ? DTokens.Ifloat : DTokens.Float;
}
else if (id.Subformat.HasFlag(LiteralSubformat.Real))
{
tt = im ? DTokens.Ireal : DTokens.Real;
}
return(new PrimitiveType(tt, 0, id)
{
NonStaticAccess = true
});
case LiteralFormat.Scalar:
var unsigned = id.Subformat.HasFlag(LiteralSubformat.Unsigned);
if (id.Subformat.HasFlag(LiteralSubformat.Long))
{
tt = unsigned ? DTokens.Ulong : DTokens.Long;
}
else
{
tt = unsigned ? DTokens.Uint : DTokens.Int;
}
return(new PrimitiveType(tt, 0, id)
{
NonStaticAccess = true
});
case Parser.LiteralFormat.StringLiteral:
case Parser.LiteralFormat.VerbatimStringLiteral:
var str = GetStringType(id.Subformat);
str.NonStaticAccess = true;
return(str);
default:
return(null);
}
}
public AbstractType Visit(TemplateInstanceExpression tix)
{
return(TryPretendMethodExecution(AmbiguousType.Get(GetOverloads(tix, ctxt), tix)));
}
public AbstractType Visit(PostfixExpression_Index x)
{
var foreExpression = EvalForeExpression(x);
// myArray[0]; myArray[0..5];
// opIndex/opSlice ?
if (foreExpression is MemberSymbol)
{
foreExpression = DResolver.StripMemberSymbols(foreExpression);
}
var udt = foreExpression as UserDefinedType;
if (udt != null)
{
ctxt.CurrentContext.IntroduceTemplateParameterTypes(udt);
var overloads = TypeDeclarationResolver.ResolveFurtherTypeIdentifier(OpIndexIdHash, AmbiguousType.TryDissolve(foreExpression), ctxt, x, false);
if (overloads != null && overloads.Length > 0)
{
var indexArgs = x.Arguments != null ? new AbstractType[x.Arguments.Length] : null;
for (int i = 0; i < indexArgs.Length; i++)
{
if (x.Arguments[i] != null)
{
indexArgs[i] = x.Arguments[i].Accept(this);
}
}
overloads = TemplateInstanceHandler.DeduceParamsAndFilterOverloads(overloads, indexArgs, true, ctxt);
ctxt.CurrentContext.RemoveParamTypesFromPreferredLocals(udt);
return(TryPretendMethodExecution(AmbiguousType.Get(overloads, x), x, indexArgs));
}
ctxt.CurrentContext.RemoveParamTypesFromPreferredLocals(udt);
if (foreExpression is TemplateIntermediateType)
{ //TODO: Proper resolution of alias this declarations
var tit = foreExpression as TemplateIntermediateType;
var ch = tit.Definition[DVariable.AliasThisIdentifierHash];
if (ch != null)
{
foreach (DVariable aliasThis in ch)
{
foreExpression = TypeDeclarationResolver.HandleNodeMatch(aliasThis, ctxt, foreExpression);
if (foreExpression != null)
{
break; // HACK: Just omit other alias this' to have a quick run-through
}
}
}
if (foreExpression == null)
{
return(tit);
}
}
}
foreExpression = DResolver.StripMemberSymbols(foreExpression);
if (foreExpression is AssocArrayType)
{
var ar = foreExpression as AssocArrayType;
/*
* myType_Array[0] -- returns TypeResult myType
* return the value type of a given array result
*/
//TODO: Handle opIndex overloads
if (ar.ValueType != null)
{
ar.ValueType.NonStaticAccess = true;
}
return(new ArrayAccessSymbol(x, ar.ValueType));
}
/*
* int* a = new int[10];
*
* a[0] = 12;
*/
else if (foreExpression is PointerType)
{
var b = (foreExpression as PointerType).Base;
if (b != null)
{
b.NonStaticAccess = true;
}
return(b);
}
//return new ArrayAccessSymbol(x,((PointerType)foreExpression).Base);
else if (foreExpression is DTuple)
{
var tt = foreExpression as DTuple;
if (x.Arguments != null && x.Arguments.Length != 0)
{
var idx = Evaluation.EvaluateValue(x.Arguments[0], ctxt) as PrimitiveValue;
if (tt.Items == null)
{
ctxt.LogError(tt.DeclarationOrExpressionBase, "No items in Type tuple");
}
else if (idx == null || !DTokens.IsBasicType_Integral(idx.BaseTypeToken))
{
ctxt.LogError(x.Arguments[0], "Index expression must evaluate to integer value");
}
else if (idx.Value > (decimal)Int32.MaxValue ||
(int)idx.Value >= tt.Items.Length || idx.Value < 0m)
{
ctxt.LogError(x.Arguments[0], "Index number must be a value between 0 and " + tt.Items.Length);
}
else
{
return(AbstractType.Get(tt.Items[(int)idx.Value]));
}
}
}
ctxt.LogError(x, "No matching base type for indexing operation");
return(null);
}
public AbstractType Visit(PostfixExpression_Access ex)
{
return(TryPretendMethodExecution(AmbiguousType.Get(Evaluation.EvalPostfixAccessExpression(this, ctxt, ex))));
}
public AbstractType Visit(NewExpression nex)
{
// http://www.d-programming-language.org/expression.html#NewExpression
AbstractType[] possibleTypes;
if (nex.Type is IdentifierDeclaration)
{
possibleTypes = TypeDeclarationResolver.Resolve((IdentifierDeclaration)nex.Type, ctxt, filterForTemplateArgs: false);
}
else
{
possibleTypes = TypeDeclarationResolver.Resolve(nex.Type, ctxt);
}
var ctors = new Dictionary <DMethod, TemplateIntermediateType>();
if (possibleTypes == null)
{
return(null);
}
foreach (var t in possibleTypes)
{
var ct = t as TemplateIntermediateType;
if (ct != null &&
!ct.Definition.ContainsAttribute(DTokens.Abstract))
{
foreach (var ctor in GetConstructors(ct))
{
// Omit all ctors that won't return the adequate
if (ct.Modifier != 0)
{
if (!ctor.ContainsAttribute(ct.Modifier, DTokens.Pure))
{
continue;
}
}
else if (ctor.Attributes != null && ctor.Attributes.Count != 0)
{
bool skip = false;
foreach (var attr in ctor.Attributes)
{
var mod = attr as Modifier;
if (mod != null)
{
switch (mod.Token)
{
case DTokens.Const:
case DTokens.Immutable:
case DTokens.Shared:
case DTokens.Nothrow: // ?
// not DTokens.Pure due to some mystical reasons
skip = true;
break;
}
if (skip)
{
break;
}
}
}
if (skip)
{
continue;
}
}
ctors.Add(ctor, ct);
}
}
else if (t is AssocArrayType)
{
t.NonStaticAccess = true;
return(AmbiguousType.Get(possibleTypes));
}
}
if (ctors.Count == 0)
{
return(new UnknownType(nex));
}
// HACK: Return the base types immediately
if (TryReturnMethodReturnType)
{
var ret = ctors.First().Value; // AmbiguousType.Get(ctors.Values);
if (ret != null)
{
ret.NonStaticAccess = true;
}
return(ret);
}
MemberSymbol finalCtor = null;
//TODO: Determine argument types and filter out ctor overloads.
var kvFirst = ctors.First();
finalCtor = new MemberSymbol(kvFirst.Key, kvFirst.Value, nex);
if (finalCtor != null)
{
return(TryPretendMethodExecution(finalCtor, nex));
}
var resolvedCtors = new List <AbstractType>();
foreach (var kv in ctors)
{
resolvedCtors.Add(new MemberSymbol(kv.Key, kv.Value, nex));
}
return(TryPretendMethodExecution(AmbiguousType.Get(resolvedCtors, nex), nex));
}
public static AbstractType ResolveTypeLoosely(IEditorData editor, out NodeResolutionAttempt resolutionAttempt, ResolutionContext ctxt = null)
{
var o = GetScopedCodeObject(editor);
if (ctxt == null)
{
ctxt = ResolutionContext.Create(editor, false);
}
AbstractType ret = null;
NodeResolutionAttempt resAttempt = NodeResolutionAttempt.Normal;
CodeCompletion.DoTimeoutableCompletionTask(null, ctxt, () =>
{
ctxt.Push(editor);
var optionBackup = ctxt.CurrentContext.ContextDependentOptions;
ctxt.CurrentContext.ContextDependentOptions |= ResolutionOptions.ReturnMethodReferencesOnly | ResolutionOptions.DontResolveAliases;
if (o is IExpression)
{
ret = ExpressionTypeEvaluation.EvaluateType((IExpression)o, ctxt, false);
}
else if (o is ITypeDeclaration)
{
ret = TypeDeclarationResolver.ResolveSingle((ITypeDeclaration)o, ctxt);
}
else if (o is INode)
{
ret = TypeDeclarationResolver.HandleNodeMatch(o as INode, ctxt, null, o);
}
else
{
ret = null;
}
if (ret == null)
{
resAttempt = NodeResolutionAttempt.NoParameterOrTemplateDeduction;
if (o is PostfixExpression_MethodCall)
{
o = (o as PostfixExpression_MethodCall).PostfixForeExpression;
}
ctxt.CurrentContext.ContextDependentOptions |= ResolutionOptions.NoTemplateParameterDeduction | ResolutionOptions.DontResolveAliases;
if (o is IdentifierExpression)
{
ret = AmbiguousType.Get(ExpressionTypeEvaluation.GetOverloads(o as IdentifierExpression, ctxt, deduceParameters: false), o);
}
else if (o is ITypeDeclaration)
{
ret = TypeDeclarationResolver.ResolveSingle(o as ITypeDeclaration, ctxt);
}
else if (o is IExpression)
{
ret = ExpressionTypeEvaluation.EvaluateType(o as IExpression, ctxt, false);
}
}
if (ret == null)
{
resAttempt = NodeResolutionAttempt.RawSymbolLookup;
var overloads = TypeDeclarationResolver.HandleNodeMatches(LookupIdRawly(editor, o as ISyntaxRegion), ctxt, null, o);
ret = AmbiguousType.Get(overloads, o);
}
ctxt.CurrentContext.ContextDependentOptions = optionBackup;
});
resolutionAttempt = resAttempt;
if (ret != null)
{
ret.DeclarationOrExpressionBase = o;
}
return(ret);
}
