Bug 10648 – std.traits.isMutable is true for struct defined immutable

With dmd 2.064alpha this code runs with no assert errors: import std.traits: isMutable; immutable struct Foo {} void main () { static assert(isMutable!Foo); } Issue found by JS: http://forum.dlang.org/thread/[email protected]

(In reply to comment #0) > With dmd 2.064alpha this code runs with no assert errors: > > > import std.traits: isMutable; > immutable struct Foo {} > void main () { > static assert(isMutable!Foo); > } > > > > Issue found by JS: > http://forum.dlang.org/thread/[email protected] It is not an issue. Because: 1. Qualified struct declaration and its behavior is properly documented. http://dlang.org/struct#ConstStruct 2. The struct name `Foo` always represent 'mutable type Foo'. And, isMutable tests whether the type qualifier is mutable or not.