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Support function pointer types in System.Reflection.Emit #119935

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Support function pointer types in System.Reflection.Emit #119935

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16 changes: 16 additions & 0 deletions src/libraries/System.Reflection.Emit/src/System/Reflection/Emit/SignatureHelper.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -223,6 +223,22 @@ private static void WriteSignatureForType(SignatureTypeEncoder signature, Type t
{
signature.GenericTypeParameter(type.GenericParameterPosition);
}
else if (type.IsFunctionPointer)
{
SignatureCallingConvention callConv = SignatureCallingConvention.Default;
// TODO: Support other calling conventions
// TODO: Support custom modifiers

MethodSignatureEncoder sigEncoder = signature.FunctionPointer(callConv);
sigEncoder.Parameters(type.GetFunctionPointerParameterTypes().Length, out ReturnTypeEncoder retTypeEncoder, out ParametersEncoder paramsEncoder);
WriteSignatureForType(retTypeEncoder.Type(), type.GetFunctionPointerReturnType(), module);

foreach (Type paramType in type.GetFunctionPointerParameterTypes())
{
ParameterTypeEncoder paramEncoder = paramsEncoder.AddParameter();
WriteSignatureForType(paramEncoder.Type(), paramType, module);
}
}
else
{
WriteSimpleSignature(signature, type, module);
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