rust/tests/compile-fail/no_effect.rs

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2015-10-28 17:50:00 +01:00
#![feature(plugin)]
#![plugin(clippy)]
#![deny(no_effect)]
#![allow(dead_code)]
#![allow(path_statements)]
struct Unit;
struct Tuple(i32);
struct Struct {
field: i32
}
enum Enum {
TupleVariant(i32),
StructVariant { field: i32 },
}
fn get_number() -> i32 { 0 }
fn get_struct() -> Struct { Struct { field: 0 } }
fn main() {
let s = get_struct();
0; //~ERROR statement with no effect
Unit; //~ERROR statement with no effect
Tuple(0); //~ERROR statement with no effect
Struct { field: 0 }; //~ERROR statement with no effect
Struct { ..s }; //~ERROR statement with no effect
Enum::TupleVariant(0); //~ERROR statement with no effect
Enum::StructVariant { field: 0 }; //~ERROR statement with no effect
// Do not warn
get_number();
Tuple(get_number());
Struct { field: get_number() };
Struct { ..get_struct() };
Enum::TupleVariant(get_number());
Enum::StructVariant { field: get_number() };
}