Move inclusive range check to validation

crates/ra_syntax/src/syntax_error.rs

@@ -83,6 +83,7 @@ pub enum SyntaxErrorKind {
     InvalidMatchInnerAttr,
     InvalidTupleIndexFormat,
     VisibilityNotAllowed,
+    InclusiveRangeMissingEnd,
 }
 
 impl fmt::Display for SyntaxErrorKind {
@@ -103,6 +104,9 @@ impl fmt::Display for SyntaxErrorKind {
             VisibilityNotAllowed => {
                 write!(f, "unnecessary visibility qualifier")
             }
+            InclusiveRangeMissingEnd => {
+                write!(f, "An inclusive range must have an end expression")
+            }
         }
     }
 }