const builtin = @import("builtin"); const expect = @import("std").testing.expect; fn get_foo() fn (*u8) usize { comptime { return struct { fn func(ptr: *u8) usize { return @intFromPtr(ptr); } }.func; } } test "define a function in an anonymous struct in comptime" { if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest; const foo = get_foo(); try expect(foo(@as(*u8, @ptrFromInt(12345))) == 12345); }