Bug 1632 – is expression fail to work as expected

import std.stdio; class myid { char[] buf; this(char[] str ) { buf = str; } } struct Lex { static myid myidinst; static void Init() { myidinst = new myid("abc"); } } void main() { Lex.Init; writefln(Lex.myidinst); assert(is (Lex.myidinst:myid)); }

What is the bug you're reporting? That the assert fails? This is correct. For an IsExpression to evaluate to true, what you give it must be a semantically valid _type_. Lex.myidinst isn't a type, it's a struct member.

try assert(is(typeof(Lex.myidinst):myid));

oh , i didn't notice isexpression is for type only