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Merged
merged 6 commits into from
Sep 18, 2018
Merged

Suggest to change numeric literal instead of casting #54273

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1984079
lint to change numeric literal instead of into
csmoe Sep 16, 2018
0ff0669
replace old literal in expr
csmoe Sep 16, 2018
17a28f7
add test for numeric literal cast
csmoe Sep 16, 2018
d31a2a0
trim type numeric literal suffix
csmoe Sep 16, 2018
9d6c4f0
merge into/literal suggestion for DRY
csmoe Sep 17, 2018
2fb6585
add test for float/integer
csmoe Sep 17, 2018
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add test for float/integer
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@csmoe
csmoe committed Sep 17, 2018
commit 2fb6585f33bf1af3b6b5143347eb534cebd257e4
7 changes: 6 additions & 1 deletion src/test/ui/mismatched_types/numeric-literal-cast.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,12 @@
// except according to those terms.

fn foo(_: u16) {}
fn foo1(_: f64) {}
fn foo2(_: i32) {}

fn main() {
foo(8u8);
foo(1u8);
foo1(2f32);
foo2(3i16);
}
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Can you add a test for floats too?


28 changes: 24 additions & 4 deletions src/test/ui/mismatched_types/numeric-literal-cast.stderr
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@@ -1,13 +1,33 @@
error[E0308]: mismatched types
--> $DIR/numeric-literal-cast.rs:13:9
--> $DIR/numeric-literal-cast.rs:16:9
|
LL | foo(8u8);
LL | foo(1u8);
| ^^^ expected u16, found u8
help: change the type of the numeric literal from `u8` to `u16`
|
LL | foo(8u16);
LL | foo(1u16);
| ^^^^

error: aborting due to previous error
error[E0308]: mismatched types
--> $DIR/numeric-literal-cast.rs:17:10
|
LL | foo1(2f32);
| ^^^^ expected f64, found f32
help: change the type of the numeric literal from `f32` to `f64`
|
LL | foo1(2f64);
| ^^^^

error[E0308]: mismatched types
--> $DIR/numeric-literal-cast.rs:18:10
|
LL | foo2(3i16);
| ^^^^ expected i32, found i16
help: change the type of the numeric literal from `i16` to `i32`
|
LL | foo2(3i32);
| ^^^^

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0308`.