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private EmitSymbolToken ( |
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| symbol | ||
| syntaxNode | Microsoft.CodeAnalysis.SyntaxNode | |
| Résultat | void | |
internal override TypeSymbol Emit(CodeGenerator cg)
{
Debug.Assert(Access.IsRead || Access.IsNone);
var type = cg.Emit(Operand);
//
if (Access.IsNone)
{
cg.EmitPop(type);
return cg.CoreTypes.Void;
}
// dereference
if (type == cg.CoreTypes.PhpAlias)
{
// <alias>.Value.AsObject()
cg.Emit_PhpAlias_GetValueRef();
type = cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.AsObject);
}
// PhpValue -> object
if (type == cg.CoreTypes.PhpValue)
{
// Template: Operators.AsObject(value) is T
type = cg.EmitCall(ILOpCode.Call, cg.CoreMethods.Operators.AsObject_PhpValue);
}
//
if (AsType.ResolvedType != null)
{
if (type.IsReferenceType && type != cg.CoreTypes.PhpArray && type != cg.CoreTypes.PhpString)
{
// Template: value is T : object
cg.Builder.EmitOpCode(ILOpCode.Isinst);
cg.EmitSymbolToken(AsType.ResolvedType, null);
// object != null
cg.Builder.EmitNullConstant(); // .ldnull
cg.Builder.EmitOpCode(ILOpCode.Cgt_un); // .cgt.un
}
else
{
cg.EmitPop(type); // Operand is never an object instance
// FALSE
cg.Builder.EmitBoolConstant(false);
}
//
return cg.CoreTypes.Boolean;
}
else
{
AsType.EmitLoadTypeInfo(cg, false);
// Template: Operators.IsInstanceOf(value, type);
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.Operators.IsInstanceOf_Object_PhpTypeInfo);
}
throw new NotImplementedException();
}
public TypeSymbol EmitLoad(CodeGenerator cg)
{
Debug.Assert(Access.IsRead);
var type = Field.Type;
// Ensure Object (..->Field->.. =)
if (Access.EnsureObject)
{
if (type == cg.CoreTypes.PhpAlias)
{
EmitOpCode_Load(cg); // PhpAlias
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpAlias.EnsureObject)
.Expect(SpecialType.System_Object);
}
else if (type == cg.CoreTypes.PhpValue)
{
EmitOpCode_LoadAddress(cg); // &PhpValue
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.EnsureObject)
.Expect(SpecialType.System_Object);
}
else
{
if (type.IsReferenceType)
{
// TODO: ensure it is not null
EmitOpCode_Load(cg);
return type;
}
else
{
// return new stdClass(ctx)
throw new NotImplementedException();
}
}
}
// Ensure Array (xxx->Field[] =)
else if (Access.EnsureArray)
{
if (type == cg.CoreTypes.PhpAlias)
{
EmitOpCode_Load(cg);
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpAlias.EnsureArray)
.Expect(cg.CoreTypes.IPhpArray);
}
else if (type == cg.CoreTypes.PhpValue)
{
EmitOpCode_LoadAddress(cg);
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.EnsureArray)
.Expect(cg.CoreTypes.IPhpArray);
}
else if (type.IsOfType(cg.CoreTypes.IPhpArray))
{
EmitOpCode_LoadAddress(cg); // ensure value is not null
if (type == cg.CoreTypes.PhpArray)
{
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.Operators.EnsureArray_PhpArrayRef)
.Expect(cg.CoreTypes.PhpArray);
}
else
{
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.Operators.EnsureArray_IPhpArrayRef)
.Expect(cg.CoreTypes.IPhpArray);
}
}
throw new NotImplementedException();
}
// Ensure Alias (&...->Field)
else if (Access.IsReadRef)
{
if (type == cg.CoreTypes.PhpAlias)
{
// TODO: <place>.AddRef()
EmitOpCode_Load(cg);
return type;
}
else if (type == cg.CoreTypes.PhpValue)
{
// return <place>.EnsureAlias()
EmitOpCode_LoadAddress(cg); // &PhpValue
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.EnsureAlias)
.Expect(cg.CoreTypes.PhpAlias);
}
else
{
Debug.Assert(false, "value cannot be aliased");
// new PhpAlias((PhpValue)<place>, 1)
EmitOpCode_Load(cg);
cg.EmitConvertToPhpValue(type, 0);
return cg.Emit_PhpValue_MakeAlias();
}
}
// Read (...->Field) & Dereference eventually
else
{
if (type == cg.CoreTypes.PhpAlias)
{
EmitOpCode_Load(cg);
if (Access.TargetType != null)
{
// convert PhpValue to target type without loading whole value and storing to temporary variable
switch (Access.TargetType.SpecialType)
{
default:
if (Access.TargetType == cg.CoreTypes.PhpArray)
{
// <PhpAlias>.Value.ToArray()
cg.Builder.EmitOpCode(ILOpCode.Ldflda);
cg.EmitSymbolToken(cg.CoreMethods.PhpAlias.Value, null);
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.ToArray);
}
break;
}
}
return cg.Emit_PhpAlias_GetValue();
}
else if (type == cg.CoreTypes.PhpValue)
{
if (Access.TargetType != null)
{
// convert PhpValue to target type without loading whole value and storing to temporary variable
switch (Access.TargetType.SpecialType)
{
case SpecialType.System_Double:
EmitOpCode_LoadAddress(cg); // &PhpValue.ToDouble()
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.ToDouble);
case SpecialType.System_Int64:
EmitOpCode_LoadAddress(cg); // &PhpValue.ToLong()
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.ToLong);
case SpecialType.System_Boolean:
EmitOpCode_LoadAddress(cg); // &PhpValue.ToBoolean()
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.ToBoolean);
case SpecialType.System_String:
EmitOpCode_LoadAddress(cg); // &PhpValue.ToString(ctx)
cg.EmitLoadContext();
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.ToString_Context);
case SpecialType.System_Object:
EmitOpCode_LoadAddress(cg); // &PhpValue.ToClass()
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.ToClass);
default:
if (Access.TargetType == cg.CoreTypes.PhpArray)
{
EmitOpCode_LoadAddress(cg); // &PhpValue.ToArray()
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.ToArray);
}
break;
}
}
// TODO: dereference if applicable (=> PhpValue.Alias.Value)
EmitOpCode_Load(cg);
return type;
}
else
{
EmitOpCode_Load(cg);
return type;
}
}
}
public TypeSymbol EmitLoad(CodeGenerator cg)
{
Debug.Assert(_access.IsRead);
var type = _place.TypeOpt;
// Ensure Object ($x->.. =)
if (_access.EnsureObject)
{
if (type == cg.CoreTypes.PhpAlias)
{
_place.EmitLoad(cg.Builder);
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpAlias.EnsureObject)
.Expect(SpecialType.System_Object);
}
else if (type == cg.CoreTypes.PhpValue)
{
_place.EmitLoadAddress(cg.Builder);
cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.EnsureObject)
.Expect(SpecialType.System_Object);
if (_thint.IsSingleType && cg.IsClassOnly(_thint))
{
var tref = cg.Routine.TypeRefContext.GetTypes(_thint)[0];
var clrtype = (TypeSymbol)cg.DeclaringCompilation.GetTypeByMetadataName(tref.QualifiedName.ClrName());
if (clrtype != null && !clrtype.IsErrorType() && clrtype != cg.CoreTypes.Object)
{
cg.EmitCastClass(clrtype);
return clrtype;
}
}
return cg.CoreTypes.Object;
}
else if (type.IsOfType(cg.CoreTypes.IPhpArray))
{
// PhpArray -> stdClass
// PhpString -> stdClass (?)
// otherwise keep the instance on stack
throw new NotImplementedException();
}
else
{
if (type.IsReferenceType)
{
if (type == cg.CoreTypes.Object)
{
// Operators.EnsureObject(ref <place>)
_place.EmitLoadAddress(cg.Builder);
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.Operators.EnsureObject_ObjectRef)
.Expect(SpecialType.System_Object);
}
else
{
// <place>
return _place.EmitLoad(cg.Builder);
}
}
else
{
// return new stdClass(ctx)
throw new NotImplementedException();
}
}
}
// Ensure Array ($x[] =)
else if (_access.EnsureArray)
{
if (type == cg.CoreTypes.PhpAlias)
{
// <place>.EnsureArray()
_place.EmitLoad(cg.Builder);
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpAlias.EnsureArray)
.Expect(cg.CoreTypes.IPhpArray);
}
else if (type == cg.CoreTypes.PhpValue)
{
if (cg.IsArrayOnly(_thint))
{
// uses typehint and accesses .Array directly if possible
// <place>.Array
_place.EmitLoadAddress(cg.Builder);
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.get_Array)
.Expect(cg.CoreTypes.PhpArray);
}
else
{
// <place>.EnsureArray()
_place.EmitLoadAddress(cg.Builder);
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.EnsureArray)
.Expect(cg.CoreTypes.IPhpArray);
}
}
else if (type.IsOfType(cg.CoreTypes.IPhpArray))
{
// Operators.EnsureArray(ref <place>)
_place.EmitLoadAddress(cg.Builder);
if (type == cg.CoreTypes.PhpArray)
{
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.Operators.EnsureArray_PhpArrayRef)
.Expect(cg.CoreTypes.PhpArray);
}
else
{
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.Operators.EnsureArray_IPhpArrayRef)
.Expect(cg.CoreTypes.IPhpArray);
}
}
throw new NotImplementedException("EnsureArray(" + type.Name + ")");
}
// Ensure Alias (&$x)
else if (_access.IsReadRef)
{
if (type == cg.CoreTypes.PhpAlias)
{
// TODO: <place>.AddRef()
return _place.EmitLoad(cg.Builder);
}
else if (type == cg.CoreTypes.PhpValue)
{
// return <place>.EnsureAlias()
_place.EmitLoadAddress(cg.Builder);
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.EnsureAlias)
.Expect(cg.CoreTypes.PhpAlias);
}
else if (type == cg.CoreTypes.PhpNumber)
{
throw new NotImplementedException();
}
else
{
Debug.Assert(false, "value cannot be aliased");
// new PhpAlias((PhpValue)<place>, 1)
cg.EmitConvertToPhpValue(_place.EmitLoad(cg.Builder), 0);
return cg.Emit_PhpValue_MakeAlias();
}
}
// Read Value & Dereference eventually
else
{
if (type == cg.CoreTypes.PhpAlias)
{
_place.EmitLoad(cg.Builder);
if (_access.TargetType == cg.CoreTypes.PhpArray)
{
// <place>.Value.ToArray()
cg.Builder.EmitOpCode(ILOpCode.Ldflda);
cg.EmitSymbolToken(cg.CoreMethods.PhpAlias.Value, null);
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.ToArray)
.Expect(cg.CoreTypes.PhpArray);
}
return cg.Emit_PhpAlias_GetValue();
}
else if (type == cg.CoreTypes.PhpValue)
{
if (_access.TargetType == cg.CoreTypes.PhpArray)
{
// <place>.ToArray()
_place.EmitLoadAddress(cg.Builder);
return cg.EmitCall(ILOpCode.Call, cg.CoreMethods.PhpValue.ToArray)
.Expect(cg.CoreTypes.PhpArray);
}
// TODO: dereference if applicable (=> PhpValue.Alias.Value)
return _place.EmitLoad(cg.Builder);
}
else
{
return _place.EmitLoad(cg.Builder);
}
}
}
/// <summary>
/// Emits ldfld, stfld, ldflda, ldsfld, stsfld.
/// </summary>
/// <param name="cg"></param>
/// <param name="code">ld* or st* OP code.</param>
void EmitOpCode(CodeGenerator cg, ILOpCode code)
{
Debug.Assert(Field != null);
cg.Builder.EmitOpCode(code);
cg.EmitSymbolToken(Field, null);
}