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 ISymbolValue Visit(TraitsExpression te)
{
switch (te.Keyword)
{
case "":
case null:
return(null);
case "hasMember":
bool ret = false;
var optionsBackup = ctxt.ContextIndependentOptions;
ctxt.ContextIndependentOptions = ResolutionOptions.IgnoreAllProtectionAttributes;
AbstractType t;
var pfa = ExpressionTypeEvaluation.prepareMemberTraitExpression(ctxt, te, out t, ValueProvider);
if (pfa != null && t != null)
{
t.NonStaticAccess = true;
ignoreErrors = true;
var res = ExpressionTypeEvaluation.EvaluateType(pfa, ctxt, false);
ret = res != null;
ignoreErrors = false;
}
ctxt.ContextIndependentOptions = optionsBackup;
return(new PrimitiveValue(ret, te));
case "identifier":
if (te.Arguments != null && te.Arguments.Length == 1)
{
return(new ArrayValue(GetStringType(), te.Arguments[0].ToString()));
}
break;
case "getMember":
pfa = ExpressionTypeEvaluation.prepareMemberTraitExpression(ctxt, te, out t, ValueProvider);
if (pfa == null || t == null)
{
break;
}
var vs = EvalPostfixAccessExpression(this, ctxt, pfa, t, ValueProvider: ValueProvider);
if (vs == null || vs.Length == 0)
{
return(null);
}
return(vs[0]);
case "getOverloads":
optionsBackup = ctxt.ContextIndependentOptions;
ctxt.ContextIndependentOptions = ResolutionOptions.IgnoreAllProtectionAttributes;
pfa = ExpressionTypeEvaluation.prepareMemberTraitExpression(ctxt, te, out t, ValueProvider);
if (pfa != null && t != null)
{
vs = EvalPostfixAccessExpression(this, ctxt, pfa, t);
}
else
{
vs = null;
}
ctxt.ContextIndependentOptions = optionsBackup;
return(new TypeValue(new DTuple(te, vs)));
case "getProtection":
optionsBackup = ctxt.ContextIndependentOptions;
ctxt.ContextIndependentOptions = ResolutionOptions.IgnoreAllProtectionAttributes;
var prot = "public";
if (te.Arguments == null || te.Arguments.Length != 1 || te.Arguments[0] == null)
{
EvalError(te, "First trait argument must be a symbol identifier");
}
else
{
t = ExpressionTypeEvaluation.ResolveTraitArgument(ctxt, te.Arguments[0]);
if (t is DSymbol)
{
var dn = (t as DSymbol).Definition;
if (dn.ContainsAttribute(DTokens.Private))
{
prot = "private";
}
else if (dn.ContainsAttribute(DTokens.Protected))
{
prot = "protected";
}
else if (dn.ContainsAttribute(DTokens.Package))
{
prot = "package";
}
else if (dn.ContainsAttribute(DTokens.Export))
{
prot = "export";
}
}
else
{
EvalError(te, "First argument must evaluate to an existing code symbol");
}
}
ctxt.ContextIndependentOptions = optionsBackup;
return(new ArrayValue(GetStringType(), prot));
case "getVirtualFunctions":
break;
case "getVirtualMethods":
break;
case "parent":
break;
case "classInstanceSize":
break;
case "allMembers":
break;
case "derivedMembers":
break;
case "isSame":
ret = false;
if (te.Arguments == null || te.Arguments.Length < 2)
{
EvalError(te, "isSame requires two arguments to compare");
}
else
{
t = ExpressionTypeEvaluation.ResolveTraitArgument(ctxt, te.Arguments[0]);
if (t != null)
{
var t2 = ExpressionTypeEvaluation.ResolveTraitArgument(ctxt, te.Arguments[1]);
if (t2 != null)
{
ret = Resolver.ResultComparer.IsEqual(t, t2);
}
}
}
return(new PrimitiveValue(ret, te));
case "compiles":
ret = false;
if (te.Arguments != null)
{
foreach (var arg in te.Arguments)
{
ret = arg == null || ExpressionTypeEvaluation.ResolveTraitArgument(ctxt, arg) != null;
if (!ret)
{
break;
}
}
}
return(new PrimitiveValue(ret, te));
}
#region isXYZ-traits
if (te.Keyword.StartsWith("is"))
{
var optionsBackup = ctxt.ContextIndependentOptions;
ctxt.ContextIndependentOptions = ResolutionOptions.IgnoreAllProtectionAttributes;
ctxt.CurrentContext.ContextDependentOptions |= ResolutionOptions.ReturnMethodReferencesOnly;
bool ret = false;
if (te.Arguments != null)
{
foreach (var arg in te.Arguments)
{
var t = ExpressionTypeEvaluation.ResolveTraitArgument(ctxt, arg);
bool tested = true;
switch (te.Keyword)
{
case "isVirtualFunction":
case "isVirtualMethod":
var ms = t as MemberSymbol;
if (ms == null || !(ms.Definition is DMethod))
{
break;
}
var dm = ms.Definition as DMethod;
var dc = dm.Parent as DClassLike;
if (dc != null && dc.ClassType != DTokens.Struct)
{
bool includeFinalNonOverridingMethods = te.Keyword == "isVirtualFunction";
ret = !dm.ContainsAttribute(includeFinalNonOverridingMethods ? (byte)0 : DTokens.Final, DTokens.Static);
}
break;
case "isAbstractFunction":
ms = t as MemberSymbol;
ret = ms != null &&
ms.Definition is DMethod &&
ms.Definition.ContainsAttribute(DTokens.Abstract);
break;
case "isFinalFunction":
ms = t as MemberSymbol;
if (ms != null && ms.Definition is DMethod)
{
ret = ms.Definition.ContainsAttribute(DTokens.Abstract) ||
(ms.Definition.Parent is DClassLike && (ms.Definition.Parent as DClassLike).ContainsAttribute(DTokens.Final));
}
break;
case "isStaticFunction":
ms = t as MemberSymbol;
ret = ms != null && ms.Definition is DMethod && ms.Definition.IsStatic;
break;
case "isRef":
ret = t is MemberSymbol && (t as MemberSymbol).Definition.ContainsAttribute(DTokens.Ref);
break;
case "isOut":
ret = t is MemberSymbol && (t as MemberSymbol).Definition.ContainsAttribute(DTokens.Out);
break;
case "isLazy":
ret = t is MemberSymbol && (t as MemberSymbol).Definition.ContainsAttribute(DTokens.Lazy);
break;
default:
tested = false;
break;
}
t = DResolver.StripMemberSymbols(t);
if (!tested)
{
switch (te.Keyword)
{
case "isArithmetic":
var pt = t as PrimitiveType;
ret = pt != null && (
DTokens.IsBasicType_Integral(pt.TypeToken) ||
DTokens.IsBasicType_FloatingPoint(pt.TypeToken));
break;
case "isFloating":
pt = t as PrimitiveType;
ret = pt != null && DTokens.IsBasicType_FloatingPoint(pt.TypeToken);
break;
case "isIntegral":
pt = t as PrimitiveType;
ret = pt != null && DTokens.IsBasicType_Integral(pt.TypeToken);
break;
case "isScalar":
pt = t as PrimitiveType;
ret = pt != null && DTokens.IsBasicType(pt.TypeToken);
break;
case "isUnsigned":
pt = t as PrimitiveType;
ret = pt != null && DTokens.IsBasicType_Unsigned(pt.TypeToken);
break;
case "isAbstractClass":
ret = t is ClassType && (t as ClassType).Definition.ContainsAttribute(DTokens.Abstract);
break;
case "isFinalClass":
ret = t is ClassType && (t as ClassType).Definition.ContainsAttribute(DTokens.Final);
break;
case "isAssociativeArray":
ret = t is AssocArrayType && !(t is ArrayType);
break;
case "isStaticArray":
ret = t is ArrayType && (t as ArrayType).IsStaticArray;
break;
}
}
if (!ret)
{
break;
}
}
}
ctxt.ContextIndependentOptions = optionsBackup;
return(new PrimitiveValue(ret, te));
}
else
{
EvalError(te, "Illegal trait token");
return(null);
}
#endregion
}
public ISymbolValue Visit(NewExpression nex)
{
//TODO: Create virtual object and call the appropriate ctor, then return the object
return(TryDoCTFEOrGetValueRefs(ExpressionTypeEvaluation.EvaluateType(nex, ctxt, false), nex));
}
public ISymbolValue Visit(IdentifierExpression id)
{
var ImplicitlyExecute = this.ImplicitlyExecute;
this.ImplicitlyExecute = true;
if (id.IsIdentifier)
{
var o = ExpressionTypeEvaluation.EvaluateType(id, ctxt, false);
if (o == null)
{
EvalError(id, "Symbol could not be found");
return(null);
}
return(TryDoCTFEOrGetValueRefs(o, id, ImplicitlyExecute));
}
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 PrimitiveValue(tk, Convert.ToDecimal((int)(char)id.Value), id));
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;
}
var v = Convert.ToDecimal(id.Value);
return(new PrimitiveValue(tt, im ? 0 : v, id, im ? v : 0));
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 PrimitiveValue(tt, Convert.ToDecimal(id.Value), id));
case Parser.LiteralFormat.StringLiteral:
case Parser.LiteralFormat.VerbatimStringLiteral:
return(new ArrayValue(GetStringType(id.Subformat), id));
default:
return(null);
}
}