Bug 6679 - Conditional parameter causes compiler to report compilation error
Summary: Conditional parameter causes compiler to report compilation error
Status: RESOLVED FIXED
Alias: None
Product: Compilers
Classification: Mono
Component: C# ()
Version: unspecified
Hardware: Macintosh Mac OS
: --- normal
Target Milestone: ---
Assignee: Marek Safar
URL:
Depends on:
Blocks:
 
Reported: 2012-08-24 09:50 UTC by Dale Ragan
Modified: 2012-09-02 06:31 UTC (History)
2 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Related Links:
Status:
RESOLVED FIXED

Description Dale Ragan 2012-08-24 09:50:22 UTC
Problem:

Receiving compilation errors when compiling a class that uses a method with optional parameter

Bug.cs(10,45): error CS1502: The best overloaded method match for `MonoCompilerBug.Bug.MethodWithOptionalParameter<string>(int, string[])' has some invalid arguments
Bug.cs(20,33): (Location of the symbol related to previous error)
Bug.cs(10,45): error CS1503: Argument `#2' cannot convert `TValue[]' expression to type `string[]'
Compilation failed: 2 error(s), 0 warnings

Code:

using System;

namespace MonoCompilerBug
{
	public class Usage
	{
		public Usage()
		{
			var bug = new Bug();
			string[] tags = bug.MethodWithOptionalParameter<string>(0);
		}
	}

	public class Bug
	{
		public Bug()
		{
		}

		public TValue[] MethodWithOptionalParameter<TValue>(int index, TValue[] defaultValue = null)
		{
			return null;
		}
	}
}

Rerproduce:

dmcs Bug.cs
Comment 1 Dale Ragan 2012-08-24 09:50:52 UTC
This compiles fine under .NET and the CLR.
Comment 2 Marek Safar 2012-09-02 06:31:39 UTC
Fixed in master