Rollup merge of rust-lang#73194 - lzutao:INT-patterns, r=dtolnay

Prefer the associated constants for pattern matching error

Resolved this comment: rust-lang#68490 (comment)

Author: Dylan-DPC

src/librustc_middle/ty/print/pretty.rs

@@ -986,7 +986,7 @@ pub trait PrettyPrinter<'tcx>:
 
                 let ui_str = ui.name_str();
                 if data == max {
-                    p!(write("std::{}::MAX", ui_str))
+                    p!(write("{}::MAX", ui_str))
                 } else {
                     if print_ty { p!(write("{}{}", data, ui_str)) } else { p!(write("{}", data)) }
                 };
@@ -999,8 +999,8 @@ pub trait PrettyPrinter<'tcx>:
 
                 let i_str = i.name_str();
                 match data {
-                    d if d == min => p!(write("std::{}::MIN", i_str)),
-                    d if d == max => p!(write("std::{}::MAX", i_str)),
+                    d if d == min => p!(write("{}::MIN", i_str)),
+                    d if d == max => p!(write("{}::MAX", i_str)),
                     _ => {
                         let data = sign_extend(data, size) as i128;
                         if print_ty {

src/test/mir-opt/const_prop/bad_op_div_by_zero/rustc.main.ConstProp.diff

@@ -59,7 +59,7 @@
                                            // mir::Constant
                                            // + span: $DIR/bad_op_div_by_zero.rs:5:14: 5:19
 -                                          // + literal: Const { ty: i32, val: Value(Scalar(0xffffffff)) }
--         _6 = Eq(const 1i32, const std::i32::MIN); // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
+-         _6 = Eq(const 1i32, const i32::MIN); // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
 +                                          // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
 +         _6 = const false;                // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
                                            // ty::Const

src/test/mir-opt/const_prop/bad_op_mod_by_zero/rustc.main.ConstProp.diff

@@ -59,7 +59,7 @@
                                            // mir::Constant
                                            // + span: $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
 -                                          // + literal: Const { ty: i32, val: Value(Scalar(0xffffffff)) }
--         _6 = Eq(const 1i32, const std::i32::MIN); // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
+-         _6 = Eq(const 1i32, const i32::MIN); // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
 +                                          // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
 +         _6 = const false;                // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
                                            // ty::Const

src/test/ui/consts/const-match-check.eval1.stderr

@@ -1,8 +1,8 @@
-error[E0005]: refutable pattern in local binding: `std::i32::MIN..=-1i32` and `1i32..=std::i32::MAX` not covered
+error[E0005]: refutable pattern in local binding: `i32::MIN..=-1i32` and `1i32..=i32::MAX` not covered
   --> $DIR/const-match-check.rs:25:15
    |
 LL |     A = { let 0 = 0; 0 },
-   |               ^ patterns `std::i32::MIN..=-1i32` and `1i32..=std::i32::MAX` not covered
+   |               ^ patterns `i32::MIN..=-1i32` and `1i32..=i32::MAX` not covered
    |
    = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
    = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html

src/test/ui/consts/const-match-check.eval2.stderr

@@ -1,8 +1,8 @@
-error[E0005]: refutable pattern in local binding: `std::i32::MIN..=-1i32` and `1i32..=std::i32::MAX` not covered
+error[E0005]: refutable pattern in local binding: `i32::MIN..=-1i32` and `1i32..=i32::MAX` not covered
   --> $DIR/const-match-check.rs:31:24
    |
 LL |     let x: [i32; { let 0 = 0; 0 }] = [];
-   |                        ^ patterns `std::i32::MIN..=-1i32` and `1i32..=std::i32::MAX` not covered
+   |                        ^ patterns `i32::MIN..=-1i32` and `1i32..=i32::MAX` not covered
    |
    = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
    = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html

src/test/ui/consts/const-match-check.matchck.stderr

@@ -1,8 +1,8 @@
-error[E0005]: refutable pattern in local binding: `std::i32::MIN..=-1i32` and `1i32..=std::i32::MAX` not covered
+error[E0005]: refutable pattern in local binding: `i32::MIN..=-1i32` and `1i32..=i32::MAX` not covered
   --> $DIR/const-match-check.rs:4:22
    |
 LL | const X: i32 = { let 0 = 0; 0 };
-   |                      ^ patterns `std::i32::MIN..=-1i32` and `1i32..=std::i32::MAX` not covered
+   |                      ^ patterns `i32::MIN..=-1i32` and `1i32..=i32::MAX` not covered
    |
    = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
    = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
@@ -12,11 +12,11 @@ help: you might want to use `if let` to ignore the variant that isn't matched
 LL | const X: i32 = { if let 0 = 0 { /* */ } 0 };
    |                  ^^^^^^^^^^^^^^^^^^^^^^
 
-error[E0005]: refutable pattern in local binding: `std::i32::MIN..=-1i32` and `1i32..=std::i32::MAX` not covered
+error[E0005]: refutable pattern in local binding: `i32::MIN..=-1i32` and `1i32..=i32::MAX` not covered
   --> $DIR/const-match-check.rs:8:23
    |
 LL | static Y: i32 = { let 0 = 0; 0 };
-   |                       ^ patterns `std::i32::MIN..=-1i32` and `1i32..=std::i32::MAX` not covered
+   |                       ^ patterns `i32::MIN..=-1i32` and `1i32..=i32::MAX` not covered
    |
    = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
    = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
@@ -26,11 +26,11 @@ help: you might want to use `if let` to ignore the variant that isn't matched
 LL | static Y: i32 = { if let 0 = 0 { /* */ } 0 };
    |                   ^^^^^^^^^^^^^^^^^^^^^^
 
-error[E0005]: refutable pattern in local binding: `std::i32::MIN..=-1i32` and `1i32..=std::i32::MAX` not covered
+error[E0005]: refutable pattern in local binding: `i32::MIN..=-1i32` and `1i32..=i32::MAX` not covered
   --> $DIR/const-match-check.rs:13:26
    |
 LL |     const X: i32 = { let 0 = 0; 0 };
-   |                          ^ patterns `std::i32::MIN..=-1i32` and `1i32..=std::i32::MAX` not covered
+   |                          ^ patterns `i32::MIN..=-1i32` and `1i32..=i32::MAX` not covered
    |
    = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
    = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
@@ -40,11 +40,11 @@ help: you might want to use `if let` to ignore the variant that isn't matched
 LL |     const X: i32 = { if let 0 = 0 { /* */ } 0 };
    |                      ^^^^^^^^^^^^^^^^^^^^^^
 
-error[E0005]: refutable pattern in local binding: `std::i32::MIN..=-1i32` and `1i32..=std::i32::MAX` not covered
+error[E0005]: refutable pattern in local binding: `i32::MIN..=-1i32` and `1i32..=i32::MAX` not covered
   --> $DIR/const-match-check.rs:19:26
    |
 LL |     const X: i32 = { let 0 = 0; 0 };
-   |                          ^ patterns `std::i32::MIN..=-1i32` and `1i32..=std::i32::MAX` not covered
+   |                          ^ patterns `i32::MIN..=-1i32` and `1i32..=i32::MAX` not covered
    |
    = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
    = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html

src/test/ui/consts/const-pattern-irrefutable.rs

@@ -9,8 +9,8 @@ use foo::d;
 const a: u8 = 2;
 
 fn main() {
-    let a = 4; //~ ERROR refutable pattern in local binding: `0u8..=1u8` and `3u8..=std::u8::MAX
-    let c = 4; //~ ERROR refutable pattern in local binding: `0u8..=1u8` and `3u8..=std::u8::MAX
-    let d = 4; //~ ERROR refutable pattern in local binding: `0u8..=1u8` and `3u8..=std::u8::MAX
+    let a = 4; //~ ERROR refutable pattern in local binding: `0u8..=1u8` and `3u8..=u8::MAX
+    let c = 4; //~ ERROR refutable pattern in local binding: `0u8..=1u8` and `3u8..=u8::MAX
+    let d = 4; //~ ERROR refutable pattern in local binding: `0u8..=1u8` and `3u8..=u8::MAX
     fn f() {} // Check that the `NOTE`s still work with an item here (cf. issue #35115).
 }

src/test/ui/consts/const-pattern-irrefutable.stderr

@@ -1,4 +1,4 @@
-error[E0005]: refutable pattern in local binding: `0u8..=1u8` and `3u8..=std::u8::MAX` not covered
+error[E0005]: refutable pattern in local binding: `0u8..=1u8` and `3u8..=u8::MAX` not covered
   --> $DIR/const-pattern-irrefutable.rs:12:9
    |
 LL | const a: u8 = 2;
@@ -12,7 +12,7 @@ LL |     let a = 4;
    |
    = note: the matched value is of type `u8`
 
-error[E0005]: refutable pattern in local binding: `0u8..=1u8` and `3u8..=std::u8::MAX` not covered
+error[E0005]: refutable pattern in local binding: `0u8..=1u8` and `3u8..=u8::MAX` not covered
   --> $DIR/const-pattern-irrefutable.rs:13:9
    |
 LL |     pub const b: u8 = 2;
@@ -26,7 +26,7 @@ LL |     let c = 4;
    |
    = note: the matched value is of type `u8`
 
-error[E0005]: refutable pattern in local binding: `0u8..=1u8` and `3u8..=std::u8::MAX` not covered
+error[E0005]: refutable pattern in local binding: `0u8..=1u8` and `3u8..=u8::MAX` not covered
   --> $DIR/const-pattern-irrefutable.rs:14:9
    |
 LL |     pub const d: u8 = 2;

src/test/ui/for/for-loop-refutable-pattern-error-message.stderr

@@ -1,8 +1,8 @@
-error[E0005]: refutable pattern in `for` loop binding: `&std::i32::MIN..=0i32` and `&2i32..=std::i32::MAX` not covered
+error[E0005]: refutable pattern in `for` loop binding: `&i32::MIN..=0i32` and `&2i32..=i32::MAX` not covered
   --> $DIR/for-loop-refutable-pattern-error-message.rs:2:9
    |
 LL |     for &1 in [1].iter() {}
-   |         ^^ patterns `&std::i32::MIN..=0i32` and `&2i32..=std::i32::MAX` not covered
+   |         ^^ patterns `&i32::MIN..=0i32` and `&2i32..=i32::MAX` not covered
    |
    = note: the matched value is of type `&i32`