tests/ui/issues/issue-20427.rs

   1 // run-pass
   2 #![allow(dead_code)]
   3 #![allow(unused_variables)]
   4 #![allow(unused_imports)]
   5 #![allow(non_upper_case_globals)]
   6 #![allow(non_camel_case_types)]
   7 #![allow(deprecated, deprecated_in_future)]
   8
   9 // aux-build:i8.rs
  10
  11 extern crate i8;
  12 use std::string as i16;
  13 static i32: i32 = 0;
  14 const i64: i64 = 0;
  15 fn u8(f32: f32) {}
  16 fn f<f64>(f64: f64) {}
  17 enum u32 {}
  18 struct u64;
  19 trait bool {}
  20
  21 mod char {
  22     extern crate i8;
  23     static i32_: i32 = 0;
  24     const i64_: i64 = 0;
  25     fn u8_(f32: f32) {}
  26     fn f_<f64_>(f64: f64_) {}
  27     type u16_ = u16;
  28     enum u32_ {}
  29     struct u64_;
  30     trait bool_ {}
  31     mod char_ {}
  32
  33     mod str {
  34         use super::i8 as i8;
  35         use super::i32_ as i32;
  36         use super::i64_ as i64;
  37         use super::u8_ as u8;
  38         use super::f_ as f64;
  39         use super::u16_ as u16;
  40         use super::u32_ as u32;
  41         use super::u64_ as u64;
  42         use super::bool_ as bool;
  43         use super::{bool_ as str};
  44         use super::char_ as char;
  45     }
  46 }
  47
  48 trait isize_ {
  49     type isize;
  50 }
  51
  52 fn usize<'usize>(usize: &'usize usize) -> &'usize usize { usize }
  53
  54 mod reuse {
  55     use std::mem::size_of;
  56
  57     type u8 = u64;
  58     use std::string::String as i16;
  59
  60     pub fn check<u16>() {
  61         assert_eq!(size_of::<u8>(), 8);
  62         assert_eq!(size_of::<::u64>(), 0);
  63         assert_eq!(size_of::<i16>(), 3 * size_of::<*const ()>());
  64         assert_eq!(size_of::<u16>(), 0);
  65     }
  66 }
  67
  68 mod guard {
  69     pub fn check() {
  70         use std::u8; // bring module u8 in scope
  71         fn f() -> u8 { // OK, resolves to primitive u8, not to std::u8
  72             u8::max_value() // OK, resolves to associated function <u8>::max_value,
  73                             // not to non-existent std::u8::max_value
  74         }
  75         assert_eq!(f(), u8::MAX); // OK, resolves to std::u8::MAX
  76     }
  77 }
  78
  79 fn main() {
  80     let bool = true;
  81     let _ = match bool {
  82         str @ true => if str { i32 as i64 } else { i64 },
  83         false => i64,
  84     };
  85
  86     reuse::check::<u64>();
  87     guard::check();
  88 }