Fixed rust-analyser: no implementation for position()

Author: michaelvanstraten

src/tools/rust-analyzer/crates/proc-macro-srv/src/abis/abi_sysroot/ra_server.rs

@@ -20,7 +20,7 @@ use token_stream::TokenStreamBuilder;
 mod symbol;
 pub use symbol::*;
 
-use std::ops::Bound;
+use std::ops::{Bound, Range};
 
 use crate::tt;
 
@@ -298,6 +298,10 @@ impl server::Span for RustAnalyzer {
         // FIXME handle span
         span
     }
+    fn position(&mut self, _span: Self::Span) -> Range<u32> {
+        // FIXME handle span
+        Range { start: 0, end: 0 }
+    }
     fn start(&mut self, _span: Self::Span) -> LineColumn {
         // FIXME handle span
         LineColumn { line: 0, column: 0 }