s/MetaVarExpr::Length/MetaVarExpr::Len/

Author: workingjubilee

compiler/rustc_expand/src/mbe/metavar_expr.rs

@@ -23,7 +23,7 @@ pub(crate) enum MetaVarExpr {
 
     /// The length of the repetition at a particular depth, where 0 is the inner-most
     /// repetition. The `usize` is the depth.
-    Length(usize),
+    Len(usize),
 }
 
 impl MetaVarExpr {
@@ -48,13 +48,13 @@ impl MetaVarExpr {
                 MetaVarExpr::Ignore(parse_ident(&mut iter, psess, ident.span)?)
             }
             "index" => MetaVarExpr::Index(parse_depth(&mut iter, psess, ident.span)?),
-            "length" => MetaVarExpr::Length(parse_depth(&mut iter, psess, ident.span)?),
+            "len" => MetaVarExpr::Len(parse_depth(&mut iter, psess, ident.span)?),
             _ => {
                 let err_msg = "unrecognized meta-variable expression";
                 let mut err = psess.dcx.struct_span_err(ident.span, err_msg);
                 err.span_suggestion(
                     ident.span,
-                    "supported expressions are count, ignore, index and length",
+                    "supported expressions are count, ignore, index and len",
                     "",
                     Applicability::MachineApplicable,
                 );
@@ -68,7 +68,7 @@ impl MetaVarExpr {
     pub(crate) fn ident(&self) -> Option<Ident> {
         match *self {
             MetaVarExpr::Count(ident, _) | MetaVarExpr::Ignore(ident) => Some(ident),
-            MetaVarExpr::Index(..) | MetaVarExpr::Length(..) => None,
+            MetaVarExpr::Index(..) | MetaVarExpr::Len(..) => None,
         }
     }
 }
@@ -111,7 +111,7 @@ fn parse_count<'psess>(
     Ok(MetaVarExpr::Count(ident, depth))
 }
 
-/// Parses the depth used by index(depth) and length(depth).
+/// Parses the depth used by index(depth) and len(depth).
 fn parse_depth<'psess>(
     iter: &mut RefTokenTreeCursor<'_>,
     psess: &'psess ParseSess,

compiler/rustc_expand/src/mbe/quoted.rs

@@ -357,7 +357,7 @@ fn parse_sep_and_kleene_op<'a>(
 
 // `$$` or a meta-variable is the lhs of a macro but shouldn't.
 //
-// For example, `macro_rules! foo { ( ${length()} ) => {} }`
+// For example, `macro_rules! foo { ( ${len()} ) => {} }`
 fn span_dollar_dollar_or_metavar_in_the_lhs_err(sess: &Session, token: &Token) {
     sess.dcx()
         .span_err(token.span, format!("unexpected token: {}", pprust::token_to_string(token)));

compiler/rustc_expand/src/mbe/transcribe.rs

@@ -675,14 +675,14 @@ fn transcribe_metavar_expr<'a>(
             }
             None => return Err(out_of_bounds_err(cx, repeats.len(), sp.entire(), "index")),
         },
-        MetaVarExpr::Length(depth) => match repeats.iter().nth_back(depth) {
+        MetaVarExpr::Len(depth) => match repeats.iter().nth_back(depth) {
             Some((_, length)) => {
                 result.push(TokenTree::token_alone(
                     TokenKind::lit(token::Integer, sym::integer(*length), None),
                     visited_span(),
                 ));
             }
-            None => return Err(out_of_bounds_err(cx, repeats.len(), sp.entire(), "length")),
+            None => return Err(out_of_bounds_err(cx, repeats.len(), sp.entire(), "len")),
         },
     }
     Ok(())