go/ast: clarify when Ident.Obj is nil

Fixes #48141

Change-Id: Id20b7801d31456ffd74301ed0fd84788b8982fb1
Reviewed-on: https://go-review.googlesource.com/c/go/+/347530
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

diff --git a/src/go/ast/ast.go b/src/go/ast/ast.go
index b0f133056425652958430342ca433dce4b732656..f6abb2d1752f160fba343b6c7356576fad5fe6b0 100644 (file)
--- a/src/go/ast/ast.go
+++ b/src/go/ast/ast.go
@@ -290,7 +290,7 @@ type (
        Ident struct {
                NamePos token.Pos // identifier position
                Name    string    // identifier name
-               Obj     *Object   // denoted object; or nil
+               Obj     *Object   // denoted object; or nil if the referenced declaration is not found in the parsed scope
        }
 
        // An Ellipsis node stands for the "..." type in a