From 83a71d464887f4b6cf9124d2f8c565e6f17f2bd3 Mon Sep 17 00:00:00 2001
From: "Andrew Gallant (Ocelot)" <Andrew.Gallant@tufts.edu>
Date: Tue, 1 May 2012 01:08:03 -0400
Subject: unions, events and errors... oh my

---
 nexgb/xgbgen/go_error.go | 30 ++++++++++++++++++++++++------
 1 file changed, 24 insertions(+), 6 deletions(-)

(limited to 'nexgb/xgbgen/go_error.go')

diff --git a/nexgb/xgbgen/go_error.go b/nexgb/xgbgen/go_error.go
index 0cb77cc..493a8b9 100644
--- a/nexgb/xgbgen/go_error.go
+++ b/nexgb/xgbgen/go_error.go
@@ -22,18 +22,36 @@ func (e *ErrorCopy) Define(c *Context) {
 	c.Putln("")
 	c.Putln("type %s %s", e.ErrType(), e.Old.(*Error).ErrType())
 	c.Putln("")
+
+	// Read defines a function that transforms a byte slice into this
+	// error struct.
+	e.Read(c)
+
+	// Write defines a function that transoforms this error struct into
+	// a byte slice.
+	e.Write(c)
+
+	// Makes sure that this error type is an Error interface.
+	c.Putln("func (err %s) ImplementsError() { }", e.ErrType())
+	c.Putln("")
+
+	// Let's the XGB know how to read this error.
+	c.Putln("func init() {")
+	c.Putln("newErrorFuncs[%d] = New%s", e.Number, e.SrcName())
+	c.Putln("}")
+	c.Putln("")
+}
+
+func (e *ErrorCopy) Read(c *Context) {
 	c.Putln("func New%s(buf []byte) %s {", e.SrcName(), e.ErrType())
 	c.Putln("return (%s)(New%s(buf))", e.ErrType(), e.Old.SrcName())
 	c.Putln("}")
 	c.Putln("")
-	c.Putln("func (err %s) ImplementsError() { }", e.ErrType())
-	c.Putln("")
+}
+
+func (e *ErrorCopy) Write(c *Context) {
 	c.Putln("func (err %s) Bytes() []byte {", e.ErrType())
 	c.Putln("return (%s)(err).Bytes()", e.Old.(*Error).ErrType())
 	c.Putln("}")
 	c.Putln("")
-	c.Putln("func init() {")
-	c.Putln("newErrorFuncs[%d] = New%s", e.Number, e.SrcName())
-	c.Putln("}")
-	c.Putln("")
 }
-- 
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