Enum items not expanded when being used as arguments to constructor in default argument

[trungnt2910]

Brief Description

OS: Windows / OS X / Linux (Ubuntu 23.04)

Used headers

SeparatorView.h from Haiku: https://github.com/haiku/haiku/blob/master/headers/os/interface/SeparatorView.h

with this declaration:

	BSeparatorView(BView* labelView,
		orientation orientation = B_HORIZONTAL,
		border_style border = B_FANCY_BORDER,
		const BAlignment& alignment
			= BAlignment(B_ALIGN_HORIZONTAL_CENTER,
				B_ALIGN_VERTICAL_CENTER));

Used settings

Target: MSVC/GCC/Clang

Other settings

Stack trace or incompilable generated code

Generated code:

        public BSeparatorView(string name, string label, global::Haiku.Interface.Orientation orientation = global::Haiku.Interface.Orientation.Horizontal, global::Haiku.Interface.BorderStyle border = global::Haiku.Interface.BorderStyle.FancyBorder) : this(name, label, orientation, border, new global::Haiku.Interface.BAlignment(B_ALIGN_HORIZONTAL_CENTER, B_ALIGN_VERTICAL_CENTER))
        {
        }

Interesting part:

new global::Haiku.Interface.BAlignment(B_ALIGN_HORIZONTAL_CENTER, B_ALIGN_VERTICAL_CENTER)

Compile error:

/home/trung/cppsharp/generated/Interface.cs(80086,330): error CS0103: The name 'B_ALIGN_HORIZONTAL_CENTER' does not exist in the current context [/home/trung/cppsharp/HaikuApiGenerator.csproj]

Probable cause:

CppSharp/src/Generator/Generators/CSharp/CSharpExpressionPrinter.cs

Lines 70 to 72 in 9071cd2

	if (constructorExpr.Arguments.Count == 1 &&
	constructorExpr.Arguments[0].Class != StatementClass.Any)
	return VisitExpression(constructorExpr.Arguments[0]);

The C# generator only expands into constructors and resolve enums when the constructor contains only one argument.