func (set *bindingSet) getNode(val *ast.ValueMap) *bindingSetNode {
hashCode := val.Hash()
for entry := set.table[hashCode]; entry != nil; entry = entry.next {
if entry.val.Equal(val) {
return entry
}
}
return nil
}
func (set *bindingSet) Add(val *ast.ValueMap) {
node := set.getNode(val)
if node != nil {
return
}
hashCode := val.Hash()
head := set.table[hashCode]
set.table[hashCode] = &bindingSetNode{val, head}
}