1 files changed, 77 insertions, 0 deletions
diff --git a/tests/ui/numeric/uppercase-base-prefix.rs b/tests/ui/numeric/uppercase-base-prefix.rs
new file mode 100644
index 00000000000..233d553da65
--- /dev/null
+++ b/tests/ui/numeric/uppercase-base-prefix.rs
@@ -0,0 +1,77 @@
+// run-rustfix
+// Checks that integers with an uppercase base prefix (0B, 0X, 0O) have a nice error
+#![allow(unused_variables)]
+
+fn main() {
+    let a = 0XABCDEF;
+    //~^ ERROR invalid base prefix for number literal
+    //~| NOTE base prefixes (`0xff`, `0b1010`, `0o755`) are lowercase
+    //~| HELP try making the prefix lowercase
+    //~| SUGGESTION 0xABCDEF
+
+    let b = 0O755;
+    //~^ ERROR invalid base prefix for number literal
+    //~| NOTE base prefixes (`0xff`, `0b1010`, `0o755`) are lowercase
+    //~| HELP try making the prefix lowercase
+    //~| SUGGESTION 0o755
+
+    let c = 0B10101010;
+    //~^ ERROR invalid base prefix for number literal
+    //~| NOTE base prefixes (`0xff`, `0b1010`, `0o755`) are lowercase
+    //~| HELP try making the prefix lowercase
+    //~| SUGGESTION 0b10101010
+
+    let d = 0XABC_DEF;
+    //~^ ERROR invalid base prefix for number literal
+    //~| NOTE base prefixes (`0xff`, `0b1010`, `0o755`) are lowercase
+    //~| HELP try making the prefix lowercase
+    //~| SUGGESTION 0xABC_DEF
+
+    let e = 0O7_55;
+    //~^ ERROR invalid base prefix for number literal
+    //~| NOTE base prefixes (`0xff`, `0b1010`, `0o755`) are lowercase
+    //~| HELP try making the prefix lowercase
+    //~| SUGGESTION 0o7_55
+
+    let f = 0B1010_1010;
+    //~^ ERROR invalid base prefix for number literal
+    //~| NOTE base prefixes (`0xff`, `0b1010`, `0o755`) are lowercase
+    //~| HELP try making the prefix lowercase
+    //~| SUGGESTION 0b1010_1010
+
+    let g = 0XABC_DEF_u64;
+    //~^ ERROR invalid base prefix for number literal
+    //~| NOTE base prefixes (`0xff`, `0b1010`, `0o755`) are lowercase
+    //~| HELP try making the prefix lowercase
+    //~| SUGGESTION 0xABC_DEF_u64
+
+    let h = 0O7_55_u32;
+    //~^ ERROR invalid base prefix for number literal
+    //~| NOTE base prefixes (`0xff`, `0b1010`, `0o755`) are lowercase
+    //~| HELP try making the prefix lowercase
+    //~| SUGGESTION 0o7_55_u32
+
+    let i = 0B1010_1010_u8;
+    //~^ ERROR invalid base prefix for number literal
+    //~| NOTE base prefixes (`0xff`, `0b1010`, `0o755`) are lowercase
+    //~| HELP try making the prefix lowercase
+    //~| SUGGESTION 0b1010_1010_u8
+    //
+    let j = 0XABCDEFu64;
+    //~^ ERROR invalid base prefix for number literal
+    //~| NOTE base prefixes (`0xff`, `0b1010`, `0o755`) are lowercase
+    //~| HELP try making the prefix lowercase
+    //~| SUGGESTION 0xABCDEFu64
+
+    let k = 0O755u32;
+    //~^ ERROR invalid base prefix for number literal
+    //~| NOTE base prefixes (`0xff`, `0b1010`, `0o755`) are lowercase
+    //~| HELP try making the prefix lowercase
+    //~| SUGGESTION 0o755u32
+
+    let l = 0B10101010u8;
+    //~^ ERROR invalid base prefix for number literal
+    //~| NOTE base prefixes (`0xff`, `0b1010`, `0o755`) are lowercase
+    //~| HELP try making the prefix lowercase
+    //~| SUGGESTION 0b10101010u8
+}