Revert "Don't remap float tokens to INT_NUMBER"

This reverts commit cb5e8da.

Author: Jonas Schievink

crates/hir-def/src/macro_expansion_tests/proc_macros.rs

@@ -104,7 +104,6 @@ macro_rules! id {
         $($t)*
     };
 }
-
 id! {
     #[proc_macros::identity]
     impl Foo for WrapBj {
@@ -120,7 +119,6 @@ macro_rules! id {
         $($t)*
     };
 }
-
 #[proc_macros::identity] impl Foo for WrapBj {
     async fn foo(&self ) {
         self .0.id().await ;

crates/mbe/src/syntax_bridge.rs

@@ -243,8 +243,6 @@ fn convert_tokens<C: TokenConvertor>(conv: &mut C) -> tt::Subtree {
             let char = match token.to_char(conv) {
                 Some(c) => c,
                 None => {
-                    // FIXME: this isn't really correct, `to_char` yields the *first* char of the token,
-                    // and this is relevant when eg. creating 2 `tt::Punct` from a single `::` token
                     panic!("Token from lexer must be single char: token = {:#?}", token);
                 }
             };

crates/parser/src/grammar.rs

@@ -324,9 +324,7 @@ fn name_ref_or_index(p: &mut Parser) {
     );
     let m = p.start();
     if p.at(FLOAT_NUMBER_PART) || p.at_ts(FLOAT_LITERAL_FIRST) {
-        // Ideally we'd remap this to `INT_NUMBER` instead, but that causes the MBE conversion to
-        // lose track of what's a float and what isn't, causing panics.
-        p.bump_remap(FLOAT_NUMBER_PART);
+        p.bump_remap(INT_NUMBER);
     } else {
         p.bump_any();
     }

crates/parser/test_data/parser/inline/ok/0011_field_expr.rast

@@ -50,7 +50,7 @@ SOURCE_FILE
                       IDENT "x"
               DOT "."
               NAME_REF
-                FLOAT_NUMBER_PART "0"
+                INT_NUMBER "0"
             DOT "."
             WHITESPACE " "
             NAME_REF
@@ -67,10 +67,10 @@ SOURCE_FILE
                       IDENT "x"
               DOT "."
               NAME_REF
-                FLOAT_NUMBER_PART "0"
+                INT_NUMBER "0"
             DOT "."
             NAME_REF
-              FLOAT_NUMBER_PART "1"
+              INT_NUMBER "1"
           SEMICOLON ";"
         WHITESPACE "\n    "
         EXPR_STMT