From 426593162ee4b22443dfca428083047ca1e39ac7 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <e.dolstra@tudelft.nl>
Date: Sun, 8 May 2005 10:28:19 +0000
Subject: * ATermMap needs an assignment operator, otherwise we are screwed.

---
 src/libexpr/nixexpr.cc | 37 +++++++++++++++++++++++++++++++------
 1 file changed, 31 insertions(+), 6 deletions(-)

(limited to 'src/libexpr/nixexpr.cc')

diff --git a/src/libexpr/nixexpr.cc b/src/libexpr/nixexpr.cc
index 2c49ecd05100..5c67b74ca6c6 100644
--- a/src/libexpr/nixexpr.cc
+++ b/src/libexpr/nixexpr.cc
@@ -7,6 +7,7 @@
 
 
 ATermMap::ATermMap(unsigned int initialSize, unsigned int maxLoadPct)
+    : table(0)
 {
     this->maxLoadPct = maxLoadPct;
     table = ATtableCreate(initialSize, maxLoadPct);
@@ -16,6 +17,36 @@ ATermMap::ATermMap(unsigned int initialSize, unsigned int maxLoadPct)
 
 ATermMap::ATermMap(const ATermMap & map)
     : table(0)
+{
+    copy(map);
+}
+
+
+ATermMap::~ATermMap()
+{
+    free();
+}
+
+
+ATermMap & ATermMap::operator = (const ATermMap & map)
+{
+    if (this == &map) return *this;
+    free();
+    copy(map);
+    return *this;
+}
+
+
+void ATermMap::free()
+{
+    if (table) {
+        ATtableDestroy(table);
+        table = 0;
+    }
+}
+
+
+void ATermMap::copy(const ATermMap & map)
 {
     ATermList keys = map.keys();
 
@@ -28,12 +59,6 @@ ATermMap::ATermMap(const ATermMap & map)
 }
 
 
-ATermMap::~ATermMap()
-{
-    if (table) ATtableDestroy(table);
-}
-
-
 void ATermMap::set(ATerm key, ATerm value)
 {
     return ATtablePut(table, key, value);
-- 
cgit 1.4.1