Add ls

Change-Id: I86f799ff9577940c7df8e01cda6c6b7867de8e7e
diff --git a/src/ast_commands.cpp b/src/ast_commands.cpp
index 9ef9044..89e2f74 100644
--- a/src/ast_commands.cpp
+++ b/src/ast_commands.cpp
@@ -24,6 +24,11 @@
     return this->m_path == b.m_path;
 }
 
+bool ls_::operator==(const ls_& b) const
+{
+    return this->m_path == b.m_path;
+}
+
 bool enum_::operator==(const enum_& b) const
 {
     return this->m_value == b.m_value;