Remove tuple index carve out
This is being proposed to be removed in
<https://github.com/rust-lang/rust/pull/145463> as we never intended for
this to be valid syntax.
Also include an invalid tuple index with underscore example.
diff --git a/src/tokens.md b/src/tokens.md
index 88b4c0b..d182547 100644
--- a/src/tokens.md
+++ b/src/tokens.md
@@ -624,7 +624,7 @@
r[lex.token.literal.int.tuple-field.syntax]
```grammar,lexer
-TUPLE_INDEX -> INTEGER_LITERAL
+TUPLE_INDEX -> DEC_LITERAL | BIN_LITERAL | OCT_LITERAL | HEX_LITERAL
```
r[lex.token.literal.int.tuple-field.intro]
@@ -637,6 +637,8 @@
decimal value. Thus, only decimal values will match, and the value must not
have any extra `0` prefix characters.
+Tuple indices may not include any suffixes (such as `usize`).
+
```rust,compile_fail
let example = ("dog", "cat", "horse");
let dog = example.0;
@@ -644,11 +646,10 @@
// The following examples are invalid.
let cat = example.01; // ERROR no field named `01`
let horse = example.0b10; // ERROR no field named `0b10`
+let unicorn = example.0usize; // ERROR suffixes on a tuple index are invalid
+let underscore = example.0_0; // ERROR no field `0_0` on type `(&str, &str, &str)`
```
-> [!NOTE]
-> Tuple indices may include certain suffixes, but this is not intended to be valid, and may be removed in a future version. See <https://github.com/rust-lang/rust/issues/60210> for more information.
-
r[lex.token.literal.float]
#### Floating-point literals
