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Suggest casting on numeric type error

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This commit is contained in:
Esteban Küber 2018-01-06 21:10:51 -08:00
parent bb345a0be3
commit aec16237e4
7 changed files with 1946 additions and 4 deletions
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4
src/test/ui/mismatched_types/issue-26480.stderr
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@ -6,6 +6,10 @@ error[E0308]: mismatched types
...
37 | write!(hello);
| -------------- in this macro invocation
help: you can cast an `usize` to `u64`, which will truncate or zero-extend depending on the bit width of `usize`
|
26 | ($arr.len() * size_of($arr[0]) as )u64); //~ ERROR mismatched types
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error[E0605]: non-primitive cast: `{integer}` as `()`
--> $DIR/issue-26480.rs:32:19

17
src/test/ui/suggestions/numeric-cast-2.rs Normal file
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@ -0,0 +1,17 @@
// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
fn foo() -> i32 {
4
}
fn main() {
let x: u32 = foo();
let z: i32 = x + x;
}

22
src/test/ui/suggestions/numeric-cast-2.stderr Normal file
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@ -0,0 +1,22 @@
error[E0308]: mismatched types
--> $DIR/numeric-cast-2.rs:15:18
|
15 | let x: u32 = foo();
| ^^^^^ expected u32, found i32
help: you can cast an `i32` to `u32`, which will sign-extend the source value
|
15 | let x: u32 = foo() as u32;
| ^^^^^^^^^^^^
error[E0308]: mismatched types
--> $DIR/numeric-cast-2.rs:16:18
|
16 | let z: i32 = x + x;
| ^^^^^ expected i32, found u32
help: you can cast an `u32` to `i32`, which will truncate the source value
|
16 | let z: i32 = (x + x as )i32;
| ^^^^^^^^^^^^^^
error: aborting due to 2 previous errors

336
src/test/ui/suggestions/numeric-cast.rs Normal file
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@ -0,0 +1,336 @@
// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
fn foo<N>(_x: N) {}
fn main() {
let x_usize: usize = 1;
let x_u64: u64 = 2;
let x_u32: u32 = 3;
let x_u16: u16 = 4;
let x_u8: u8 = 5;
let x_isize: isize = 6;
let x_i64: i64 = 7;
let x_i32: i32 = 8;
let x_i16: i16 = 9;
let x_i8: i8 = 10;
let x_f64: f64 = 11.0;
let x_f32: f32 = 12.0;
foo::<usize>(x_usize);
foo::<usize>(x_u64);
//~^ ERROR mismatched types
foo::<usize>(x_u32);
//~^ ERROR mismatched types
foo::<usize>(x_u16);
//~^ ERROR mismatched types
foo::<usize>(x_u8);
//~^ ERROR mismatched types
foo::<usize>(x_isize);
//~^ ERROR mismatched types
foo::<usize>(x_i64);
//~^ ERROR mismatched types
foo::<usize>(x_i32);
//~^ ERROR mismatched types
foo::<usize>(x_i16);
//~^ ERROR mismatched types
foo::<usize>(x_i8);
//~^ ERROR mismatched types
foo::<usize>(x_f64);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<usize>(x_f32);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<isize>(x_usize);
//~^ ERROR mismatched types
foo::<isize>(x_u64);
//~^ ERROR mismatched types
foo::<isize>(x_u32);
//~^ ERROR mismatched types
foo::<isize>(x_u16);
//~^ ERROR mismatched types
foo::<isize>(x_u8);
//~^ ERROR mismatched types
foo::<isize>(x_isize);
foo::<isize>(x_i64);
//~^ ERROR mismatched types
foo::<isize>(x_i32);
//~^ ERROR mismatched types
foo::<isize>(x_i16);
//~^ ERROR mismatched types
foo::<isize>(x_i8);
//~^ ERROR mismatched types
foo::<isize>(x_f64);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<isize>(x_f32);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<u64>(x_usize);
//~^ ERROR mismatched types
foo::<u64>(x_u64);
foo::<u64>(x_u32);
//~^ ERROR mismatched types
foo::<u64>(x_u16);
//~^ ERROR mismatched types
foo::<u64>(x_u8);
//~^ ERROR mismatched types
foo::<u64>(x_isize);
//~^ ERROR mismatched types
foo::<u64>(x_i64);
//~^ ERROR mismatched types
foo::<u64>(x_i32);
//~^ ERROR mismatched types
foo::<u64>(x_i16);
//~^ ERROR mismatched types
foo::<u64>(x_i8);
//~^ ERROR mismatched types
foo::<u64>(x_f64);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<u64>(x_f32);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<i64>(x_usize);
//~^ ERROR mismatched types
foo::<i64>(x_u64);
//~^ ERROR mismatched types
foo::<i64>(x_u32);
//~^ ERROR mismatched types
foo::<i64>(x_u16);
//~^ ERROR mismatched types
foo::<i64>(x_u8);
//~^ ERROR mismatched types
foo::<i64>(x_isize);
//~^ ERROR mismatched types
foo::<i64>(x_i64);
foo::<i64>(x_i32);
//~^ ERROR mismatched types
foo::<i64>(x_i16);
//~^ ERROR mismatched types
foo::<i64>(x_i8);
//~^ ERROR mismatched types
foo::<i64>(x_f64);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<i64>(x_f32);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<u32>(x_usize);
//~^ ERROR mismatched types
foo::<u32>(x_u64);
//~^ ERROR mismatched types
foo::<u32>(x_u32);
foo::<u32>(x_u16);
//~^ ERROR mismatched types
foo::<u32>(x_u8);
//~^ ERROR mismatched types
foo::<u32>(x_isize);
//~^ ERROR mismatched types
foo::<u32>(x_i64);
//~^ ERROR mismatched types
foo::<u32>(x_i32);
//~^ ERROR mismatched types
foo::<u32>(x_i16);
//~^ ERROR mismatched types
foo::<u32>(x_i8);
//~^ ERROR mismatched types
foo::<u32>(x_f64);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<u32>(x_f32);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<i32>(x_usize);
//~^ ERROR mismatched types
foo::<i32>(x_u64);
//~^ ERROR mismatched types
foo::<i32>(x_u32);
//~^ ERROR mismatched types
foo::<i32>(x_u16);
//~^ ERROR mismatched types
foo::<i32>(x_u8);
//~^ ERROR mismatched types
foo::<i32>(x_isize);
//~^ ERROR mismatched types
foo::<i32>(x_i64);
//~^ ERROR mismatched types
foo::<i32>(x_i32);
foo::<i32>(x_i16);
//~^ ERROR mismatched types
foo::<i32>(x_i8);
//~^ ERROR mismatched types
foo::<i32>(x_f64);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<i32>(x_f32);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<u16>(x_usize);
//~^ ERROR mismatched types
foo::<u16>(x_u64);
//~^ ERROR mismatched types
foo::<u16>(x_u32);
//~^ ERROR mismatched types
foo::<u16>(x_u16);
foo::<u16>(x_u8);
//~^ ERROR mismatched types
foo::<u16>(x_isize);
//~^ ERROR mismatched types
foo::<u16>(x_i64);
//~^ ERROR mismatched types
foo::<u16>(x_i32);
//~^ ERROR mismatched types
foo::<u16>(x_i16);
//~^ ERROR mismatched types
foo::<u16>(x_i8);
//~^ ERROR mismatched types
foo::<u16>(x_f64);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<u16>(x_f32);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<i16>(x_usize);
//~^ ERROR mismatched types
foo::<i16>(x_u64);
//~^ ERROR mismatched types
foo::<i16>(x_u32);
//~^ ERROR mismatched types
foo::<i16>(x_u16);
//~^ ERROR mismatched types
foo::<i16>(x_u8);
//~^ ERROR mismatched types
foo::<i16>(x_isize);
//~^ ERROR mismatched types
foo::<i16>(x_i64);
//~^ ERROR mismatched types
foo::<i16>(x_i32);
//~^ ERROR mismatched types
foo::<i16>(x_i16);
foo::<i16>(x_i8);
//~^ ERROR mismatched types
foo::<i16>(x_f64);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<i16>(x_f32);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<u8>(x_usize);
//~^ ERROR mismatched types
foo::<u8>(x_u64);
//~^ ERROR mismatched types
foo::<u8>(x_u32);
//~^ ERROR mismatched types
foo::<u8>(x_u16);
//~^ ERROR mismatched types
foo::<u8>(x_u8);
foo::<u8>(x_isize);
//~^ ERROR mismatched types
foo::<u8>(x_i64);
//~^ ERROR mismatched types
foo::<u8>(x_i32);
//~^ ERROR mismatched types
foo::<u8>(x_i16);
//~^ ERROR mismatched types
foo::<u8>(x_i8);
//~^ ERROR mismatched types
foo::<u8>(x_f64);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<u8>(x_f32);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<i8>(x_usize);
//~^ ERROR mismatched types
foo::<i8>(x_u64);
//~^ ERROR mismatched types
foo::<i8>(x_u32);
//~^ ERROR mismatched types
foo::<i8>(x_u16);
//~^ ERROR mismatched types
foo::<i8>(x_u8);
//~^ ERROR mismatched types
foo::<i8>(x_isize);
//~^ ERROR mismatched types
foo::<i8>(x_i64);
//~^ ERROR mismatched types
foo::<i8>(x_i32);
//~^ ERROR mismatched types
foo::<i8>(x_i16);
//~^ ERROR mismatched types
foo::<i8>(x_i8);
foo::<i8>(x_f64);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<i8>(x_f32);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<f64>(x_usize);
//~^ ERROR mismatched types
foo::<f64>(x_u64);
//~^ ERROR mismatched types
foo::<f64>(x_u32);
//~^ ERROR mismatched types
foo::<f64>(x_u16);
//~^ ERROR mismatched types
foo::<f64>(x_u8);
//~^ ERROR mismatched types
foo::<f64>(x_isize);
//~^ ERROR mismatched types
foo::<f64>(x_i64);
//~^ ERROR mismatched types
foo::<f64>(x_i32);
//~^ ERROR mismatched types
foo::<f64>(x_i16);
//~^ ERROR mismatched types
foo::<f64>(x_i8);
//~^ ERROR mismatched types
foo::<f64>(x_f64);
foo::<f64>(x_f32);
//~^ ERROR mismatched types
foo::<f32>(x_usize);
//~^ ERROR mismatched types
foo::<f32>(x_u64);
//~^ ERROR mismatched types
foo::<f32>(x_u32);
//~^ ERROR mismatched types
foo::<f32>(x_u16);
//~^ ERROR mismatched types
foo::<f32>(x_u8);
//~^ ERROR mismatched types
foo::<f32>(x_isize);
//~^ ERROR mismatched types
foo::<f32>(x_i64);
//~^ ERROR mismatched types
foo::<f32>(x_i32);
//~^ ERROR mismatched types
foo::<f32>(x_i16);
//~^ ERROR mismatched types
foo::<f32>(x_i8);
//~^ ERROR mismatched types
foo::<f32>(x_f64);
//~^ ERROR mismatched types
//~| WARN casting here will cause Undefined Behavior
foo::<f32>(x_f32);
}

1364
src/test/ui/suggestions/numeric-cast.stderr Normal file
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