//@ run-rustfix #![deny(function_casts_as_integer)] #![allow(unused_variables, dead_code)] // For the rustfix-ed code. fn foo() {} enum MyEnum { Variant(u32), } struct MyStruct(u32); fn main() { let x = foo as usize; //~ ERROR: function_casts_as_integer let x = String::len as usize; //~ ERROR: function_casts_as_integer let x = MyEnum::Variant as usize; //~ ERROR: function_casts_as_integer let x = MyStruct as usize; //~ ERROR: function_casts_as_integer // Ok. let x = foo as fn() as usize; let x = foo as *const () as usize; }