[Mono-bugs] [Bug 338253] New: MCS compiler error with non-standard formatting and wrong error location

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=338253

           Summary: MCS compiler error with non-standard formatting and
                    wrong error location
           Product: Mono: Compilers
           Version: 1.2
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: C#
        AssignedTo: mono-bugs at ximian.com
        ReportedBy: joe at unity3d.com
         QAContact: mono-bugs at ximian.com
          Found By: ---


error CS0121: The call is ambiguous between the following methods or
properties: `V3.operator true(V3, V3)' and `V2.operator true(V2, V2)'
/Users/joe/compiler_error/Test3.cs(30,26): (Location of the symbol related to
previous error)
Compilation failed: 1 error(s), 0 warnings

Instead it should output:

/Users/joe/compiler_error/Test3.cs(43,26): error CS0121: The call is ambiguous
between the following methods or properties: `V3.operator true(V3, V3)' and
`V2.operator true(V2, V2)'
Compilation failed: 1 error(s), 0 warnings


So basically mcs gives the wrong line number and reports it in a way that makes
it extremely hard to parse for a development tool.


mcs Test.cs

----- Test.cs


public struct V3
{
        public float x, y, z;

        public V3 (float ix, float iy, float iz) {x = ix; y = iy;z = iz;   }

        static public V3 operator - (V3 lhs, V3 rhs)
        {
                return new V3(lhs.x - rhs.x, lhs.y - rhs.y, lhs.z - rhs.z);
        }
}

public struct V2
{
        public float x, y;

        public V2 (float ix, float iy)  {x = ix; y = iy;  }

        public static implicit operator V2(V3 v) {
                return new V2(v.x, v.y);
        }

        public static implicit operator V3(V2 v) {
                return new V3(v.x, v.y, 0);
        }

        static public V2 operator - (V2 lhs, V2 rhs)
        {
                return new V2(lhs.x - rhs.x, lhs.y - rhs.y);
        }
}

internal class Test
{
        static void Main ()
        {
                V2 a = new V2();
                V3 b = new V3();

                V2 s = a - b;           
        }
}


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