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add sizeof expression #158

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add sizeof expression #158

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12cc751
add `sizeof` expression
ureishi Mar 15, 2024
cc989ce
Update BinderSyntaxVisitor.cs
ureishi Mar 24, 2024
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41 changes: 41 additions & 0 deletions Packages/com.vrchat.UdonSharp/Editor/Compiler/Binder/BinderSyntaxVisitor.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -346,6 +346,47 @@ public override BoundNode VisitTypeOfExpression(TypeOfExpressionSyntax node)

return new BoundConstantExpression(type.UdonType.SystemType, Context.GetTypeSymbol(typeof(Type)));
}

public override BoundNode VisitSizeOfExpression(SizeOfExpressionSyntax node)
{
TypeSymbol type = GetTypeSymbol(node.Type);

if (type.IsEnum)
type = Context.GetTypeSymbol(((INamedTypeSymbol)type.RoslynSymbol).EnumUnderlyingType);

int size;

if (type == Context.GetTypeSymbol(SpecialType.System_SByte))
size = sizeof(sbyte);
else if (type == Context.GetTypeSymbol(SpecialType.System_Byte))
size = sizeof(byte);
else if (type == Context.GetTypeSymbol(SpecialType.System_Int16))
size = sizeof(short);
else if (type == Context.GetTypeSymbol(SpecialType.System_UInt16))
size = sizeof(ushort);
else if (type == Context.GetTypeSymbol(SpecialType.System_Int32))
size = sizeof(int);
else if (type == Context.GetTypeSymbol(SpecialType.System_UInt32))
size = sizeof(uint);
else if (type == Context.GetTypeSymbol(SpecialType.System_Int64))
size = sizeof(long);
else if (type == Context.GetTypeSymbol(SpecialType.System_UInt64))
size = sizeof(ulong);
else if (type == Context.GetTypeSymbol(SpecialType.System_Char))
size = sizeof(char);
else if (type == Context.GetTypeSymbol(SpecialType.System_Single))
size = sizeof(float);
else if (type == Context.GetTypeSymbol(SpecialType.System_Double))
size = sizeof(double);
else if (type == Context.GetTypeSymbol(SpecialType.System_Decimal))
size = sizeof(decimal);
else if (type == Context.GetTypeSymbol(SpecialType.System_Boolean))
size = sizeof(bool);
else
throw new NotSupportedException($"'{type.Name}' does not have a predefined size.", node.GetLocation());

return new BoundConstantExpression(size, Context.GetTypeSymbol(SpecialType.System_Int32));
}

private BoundExpression HandleNameOfExpression(InvocationExpressionSyntax node)
{
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