Re: class MyClass(T) : Base if (ConstraintExpression) {} compilation error

[Maxim Fomin]

On Friday, 24 May 2013 at 14:49:24 UTC, ref2401 wrote:
Version D 2.062
Please explain what is causing the error

class Base
{ }

class Class(T) : Base
if (is(T == int))
{ }

Error: unrecognized declaration
Error: members expected
Error: Declaration expected, not 'if'
Error: { } expected following aggregate declaration

because dmd acts as grammar nazi:

ClassTemplateDeclaration: class Identifier ( 
TemplateParameterList ) Constraintopt BaseClassListopt ClassBody