src/test/compile-fail/macro-comma-behavior.rs

   1 // Copyright 2018 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // Companion test to the similarly-named file in run-pass.
  12
  13 // compile-flags: -C debug_assertions=yes
  14 // revisions: std core
  15
  16 #![cfg_attr(core, no_std)]
  17
  18 #[cfg(std)] use std::fmt;
  19 #[cfg(core)] use core::fmt;
  20
  21 // (see documentation of the similarly-named test in run-pass)
  22 fn to_format_or_not_to_format() {
  23     let falsum = || false;
  24
  25     // assert!(true, "{}",); // see run-pass
  26
  27     assert_eq!(1, 1, "{}",);
  28     //[core]~^ ERROR no arguments
  29     //[std]~^^ ERROR no arguments
  30     assert_ne!(1, 2, "{}",);
  31     //[core]~^ ERROR no arguments
  32     //[std]~^^ ERROR no arguments
  33
  34     // debug_assert!(true, "{}",); // see run-pass
  35
  36     debug_assert_eq!(1, 1, "{}",);
  37     //[core]~^ ERROR no arguments
  38     //[std]~^^ ERROR no arguments
  39     debug_assert_ne!(1, 2, "{}",);
  40     //[core]~^ ERROR no arguments
  41     //[std]~^^ ERROR no arguments
  42
  43     #[cfg(std)] {
  44         eprint!("{}",);
  45         //[std]~^ ERROR no arguments
  46     }
  47
  48     #[cfg(std)] {
  49         // FIXME: compile-fail says "expected error not found" even though
  50         //        rustc does emit an error
  51         // eprintln!("{}",);
  52         // <DISABLED> [std]~^ ERROR no arguments
  53     }
  54
  55     #[cfg(std)] {
  56         format!("{}",);
  57         //[std]~^ ERROR no arguments
  58     }
  59
  60     format_args!("{}",);
  61     //[core]~^ ERROR no arguments
  62     //[std]~^^ ERROR no arguments
  63
  64     // if falsum() { panic!("{}",); } // see run-pass
  65
  66     #[cfg(std)] {
  67         print!("{}",);
  68         //[std]~^ ERROR no arguments
  69     }
  70
  71     #[cfg(std)] {
  72         // FIXME: compile-fail says "expected error not found" even though
  73         //        rustc does emit an error
  74         // println!("{}",);
  75         // <DISABLED> [std]~^ ERROR no arguments
  76     }
  77
  78     unimplemented!("{}",);
  79     //[core]~^ ERROR no arguments
  80     //[std]~^^ ERROR no arguments
  81
  82     // if falsum() { unreachable!("{}",); } // see run-pass
  83
  84     struct S;
  85     impl fmt::Display for S {
  86         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  87             write!(f, "{}",)?;
  88             //[core]~^ ERROR no arguments
  89             //[std]~^^ ERROR no arguments
  90
  91             // FIXME: compile-fail says "expected error not found" even though
  92             //        rustc does emit an error
  93             // writeln!(f, "{}",)?;
  94             // <DISABLED> [core]~^ ERROR no arguments
  95             // <DISABLED> [std]~^^ ERROR no arguments
  96             Ok(())
  97         }
  98     }
  99 }
 100
 101 fn main() {}