Rollup merge of rust-lang#55632 - ollie27:deny_overflowing_literals, r=Centril

Deny the `overflowing_literals` lint for all editions

The `overflowing_literals` was made deny by default for the 2018 edition by rust-lang#54507, however I'm not aware of any reason it can't be made deny by default for the 2015 edition as well.

Author: Centril

src/doc/rustc/src/lints/listing/deny-by-default.md

@@ -149,6 +149,26 @@ error: const items should never be #[no_mangle]
   |
 ```
 
+## overflowing-literals
+
+This lint detects literal out of range for its type. Some
+example code that triggers this lint:
+
+```rust,compile_fail
+let x: u8 = 1000;
+```
+
+This will produce:
+
+```text
+error: literal out of range for u8
+ --> src/main.rs:2:17
+  |
+2 |     let x: u8 = 1000;
+  |                 ^^^^
+  |
+```
+
 ## parenthesized-params-in-types-and-modules
 
 This lint detects incorrect parentheses. Some example code that triggers this

src/doc/rustc/src/lints/listing/warn-by-default.md

@@ -285,26 +285,6 @@ warning: functions generic over types must be mangled
   |
 ```
 
-## overflowing-literals
-
-This lint detects literal out of range for its type. Some
-example code that triggers this lint:
-
-```rust
-let x: u8 = 1000;
-```
-
-This will produce:
-
-```text
-warning: literal out of range for u8
- --> src/main.rs:2:17
-  |
-2 |     let x: u8 = 1000;
-  |                 ^^^^
-  |
-```
-
 ## path-statements
 
 This lint detects path statements with no effect. Some example code that

src/librustc_lint/types.rs

@@ -16,7 +16,6 @@ use std::{i8, i16, i32, i64, u8, u16, u32, u64, f32, f64};
 use syntax::{ast, attr};
 use syntax::errors::Applicability;
 use rustc_target::spec::abi::Abi;
-use syntax::edition::Edition;
 use syntax_pos::Span;
 use syntax::source_map;
 
@@ -34,9 +33,8 @@ declare_lint! {
 
 declare_lint! {
     OVERFLOWING_LITERALS,
-    Warn,
-    "literal out of range for its type",
-    Edition::Edition2018 => Deny
+    Deny,
+    "literal out of range for its type"
 }
 
 declare_lint! {

src/librustc_typeck/diagnostics.rs

@@ -2873,8 +2873,8 @@ E0370: r##"
 The maximum value of an enum was reached, so it cannot be automatically
 set in the next enum value. Erroneous code example:
 
-```compile_fail
-#[deny(overflowing_literals)]
+```compile_fail,E0370
+#[repr(i64)]
 enum Foo {
     X = 0x7fffffffffffffff,
     Y, // error: enum discriminant overflowed on value after
@@ -2887,6 +2887,7 @@ To fix this, please set manually the next enum value or put the enum variant
 with the maximum value at the end of the enum. Examples:
 
 ```
+#[repr(i64)]
 enum Foo {
     X = 0x7fffffffffffffff,
     Y = 0, // ok!
@@ -2896,6 +2897,7 @@ enum Foo {
 Or:
 
 ```
+#[repr(i64)]
 enum Foo {
     Y = 0, // ok!
     X = 0x7fffffffffffffff,

src/test/ui/editions/edition-deny-overflowing-literals-2018.rs renamed to src/test/ui/lint/deny-overflowing-literals.rs

@@ -1,5 +1,3 @@
-// edition:2018
-
 fn main() {
     let x: u8 = 256;
     //~^ error: literal out of range for u8

src/test/ui/editions/edition-deny-overflowing-literals-2018.stderr renamed to src/test/ui/lint/deny-overflowing-literals.stderr

@@ -1,5 +1,5 @@
 error: literal out of range for u8
-  --> $DIR/edition-deny-overflowing-literals-2018.rs:4:17
+  --> $DIR/deny-overflowing-literals.rs:2:17
    |
 LL |     let x: u8 = 256;
    |                 ^^^

src/test/ui/lint/lint-type-limits2.rs

@@ -1,4 +1,5 @@
 #![allow(dead_code)]
+#![warn(overflowing_literals)]
 
 // compile-flags: -D unused-comparisons
 fn main() { }

src/test/ui/lint/lint-type-limits2.stderr

@@ -1,18 +1,22 @@
 error: comparison is useless due to type limits
-  --> $DIR/lint-type-limits2.rs:12:5
+  --> $DIR/lint-type-limits2.rs:13:5
    |
 LL |     128 > bar() //~ ERROR comparison is useless due to type limits
    |     ^^^^^^^^^^^
    |
    = note: requested on the command line with `-D unused-comparisons`
 
 warning: literal out of range for i8
-  --> $DIR/lint-type-limits2.rs:12:5
+  --> $DIR/lint-type-limits2.rs:13:5
    |
 LL |     128 > bar() //~ ERROR comparison is useless due to type limits
    |     ^^^
    |
-   = note: #[warn(overflowing_literals)] on by default
+note: lint level defined here
+  --> $DIR/lint-type-limits2.rs:2:9
+   |
+LL | #![warn(overflowing_literals)]
+   |         ^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to previous error
 

src/test/ui/lint/lint-type-limits3.rs

@@ -1,4 +1,5 @@
 #![allow(dead_code)]
+#![warn(overflowing_literals)]
 
 // compile-flags: -D unused-comparisons
 fn main() { }

src/test/ui/lint/lint-type-limits3.stderr

@@ -1,18 +1,22 @@
 error: comparison is useless due to type limits
-  --> $DIR/lint-type-limits3.rs:8:11
+  --> $DIR/lint-type-limits3.rs:9:11
    |
 LL |     while 200 != i { //~ ERROR comparison is useless due to type limits
    |           ^^^^^^^^
    |
    = note: requested on the command line with `-D unused-comparisons`
 
 warning: literal out of range for i8
-  --> $DIR/lint-type-limits3.rs:8:11
+  --> $DIR/lint-type-limits3.rs:9:11
    |
 LL |     while 200 != i { //~ ERROR comparison is useless due to type limits
    |           ^^^
    |
-   = note: #[warn(overflowing_literals)] on by default
+note: lint level defined here
+  --> $DIR/lint-type-limits3.rs:2:9
+   |
+LL | #![warn(overflowing_literals)]
+   |         ^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to previous error