From: Rob Pike <r@golang.org>
Date: Fri, 22 Mar 2013 17:03:55 +0000 (-0700)
Subject: spec: add example showing missing return statement
X-Git-Tag: go1.1rc2~379
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=d02089101c9d8375d991b679c9a1c8432e415cd8;p=gostls13.git

spec: add example showing missing return statement
Will help people find the rules by searching the spec by
having a comment saying "missing return";
"terminating statement" does not evoke the rule to the
uninitiated.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7838044
---

diff --git a/doc/go_spec.html b/doc/go_spec.html
index ebef65916e..2136d8bbe8 100644
--- a/doc/go_spec.html
+++ b/doc/go_spec.html
@@ -1,6 +1,6 @@
 <!--{
 	"Title": "The Go Programming Language Specification",
-	"Subtitle": "Version of March 20, 2013",
+	"Subtitle": "Version of March 22, 2013",
 	"Path": "/ref/spec"
 }-->
 
@@ -1964,6 +1964,17 @@ result parameters, the function body's statement list must end in
 a <a href="#Terminating_statements">terminating statement</a>.
 </p>
 
+<pre>
+func findMarker(c <-chan int) int {
+	for i := range c {
+		if x := <-c; isMarker(x) {
+			return x
+		}
+	}
+	// invalid: missing return statement.
+}
+</pre>
+
 <p>
 A function declaration may omit the body. Such a declaration provides the
 signature for a function implemented outside Go, such as an assembly routine.