panic when an extension request is issued before an extension has been initialized. but give a nice error message for the happy people.

1 files changed, 11 insertions, 5 deletions

diff --git a/nexgb/bigreq/bigreq.go b/nexgb/bigreq/bigreq.go
index 32dacba..43a15a4 100644
--- a/nexgb/bigreq/bigreq.go
+++ b/nexgb/bigreq/bigreq.go
@@ -2,7 +2,7 @@
 package bigreq
 
 /*
-	This file was generated by bigreq.xml on May 11 2012 1:58:35am EDT.
+	This file was generated by bigreq.xml on May 11 2012 11:57:18pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,6 +40,10 @@ func init() {
 	xgb.NewExtErrorFuncs["BIG-REQUESTS"] = make(map[int]xgb.NewErrorFun)
 }
 
+// Skipping definition for base type 'Bool'
+
+// Skipping definition for base type 'Float'
+
 // Skipping definition for base type 'Card8'
 
 // Skipping definition for base type 'Int16'
@@ -60,10 +64,6 @@ func init() {
 
 // Skipping definition for base type 'Double'
 
-// Skipping definition for base type 'Bool'
-
-// Skipping definition for base type 'Float'
-
 // EnableCookie is a cookie used only for Enable requests.
 type EnableCookie struct {
 	*xgb.Cookie
@@ -72,6 +72,9 @@ type EnableCookie struct {
 // Enable sends a checked request.
 // If an error occurs, it will be returned with the reply by calling EnableCookie.Reply()
 func Enable(c *xgb.Conn) EnableCookie {
+	if _, ok := c.Extensions["BIG-REQUESTS"]; !ok {
+		panic("Cannot issue request 'Enable' using the uninitialized extension 'BIG-REQUESTS'. bigreq.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(enableRequest(c), cookie)
 	return EnableCookie{cookie}
@@ -80,6 +83,9 @@ func Enable(c *xgb.Conn) EnableCookie {
 // EnableUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func EnableUnchecked(c *xgb.Conn) EnableCookie {
+	if _, ok := c.Extensions["BIG-REQUESTS"]; !ok {
+		panic("Cannot issue request 'Enable' using the uninitialized extension 'BIG-REQUESTS'. bigreq.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(enableRequest(c), cookie)
 	return EnableCookie{cookie}