src/go/doc: in Examples, check for len of params.List, not nilness

This makes the check the same as the one in the tests vet check.
It's safer to check the number of arguments rather than for a nil
slice.

Change-Id: I8e04e9c612573f334770c1c4245238649656c6e2
Reviewed-on: https://go-review.googlesource.com/c/go/+/211598
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>

diff --git a/src/go/doc/example.go b/src/go/doc/example.go
index 868db8a23fad698a2be5eb0f89645100fb9e9bc6..a010d3a85ab588a324db1dc0b1b6a010b755ee41 100644 (file)
--- a/src/go/doc/example.go
+++ b/src/go/doc/example.go
@@ -62,7 +62,7 @@ func Examples(testFiles ...*ast.File) []*Example {
                        if !ok || f.Recv != nil {
                                continue
                        }
-                       if params := f.Type.Params; params.List != nil {
+                       if params := f.Type.Params; len(params.List) != 0 {
                                continue // function has params; not a valid example
                        }
                        numDecl++