X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fex.cpp;h=412f8c95509fb3af03367b5a4a9de4d90474e44d;hp=a390d71475f58d4dc71cc26783ca547ef18563a0;hb=68381b57513bb09d41cef9522afae60a40c2c3d7;hpb=6117b4f8f835a737ce6178617a22855016ceaf27

diff --git a/ginac/ex.cpp b/ginac/ex.cpp
index a390d714..412f8c95 100644
--- a/ginac/ex.cpp
+++ b/ginac/ex.cpp
@@ -28,6 +28,7 @@
 #include "ncmul.h"
 #include "numeric.h"
 #include "power.h"
+#include "relational.h"
 #include "debugmsg.h"
 #include "utils.h"
 
@@ -427,6 +428,7 @@ ex ex::operator[](int i) const
     return (*bp)[i];
 }
 
+/** Return operand/member at position i. */
 ex ex::op(int i) const
 {
     debugmsg("ex op()",LOGLEVEL_MEMBER_FUNCTION);
@@ -434,6 +436,7 @@ ex ex::op(int i) const
     return bp->op(i);
 }
 
+/** Return modifyable operand/member at position i. */
 ex & ex::let_op(int i)
 {
     debugmsg("ex let_op()",LOGLEVEL_MEMBER_FUNCTION);
@@ -442,6 +445,22 @@ ex & ex::let_op(int i)
     return bp->let_op(i);
 }
 
+/** Left hand side of relational expression. */
+ex ex::lhs(void) const
+{
+    debugmsg("ex lhs()",LOGLEVEL_MEMBER_FUNCTION);
+    GINAC_ASSERT(is_ex_of_type(*this,relational));
+    return (*static_cast<relational *>(bp)).lhs();
+}
+
+/** Right hand side of relational expression. */
+ex ex::rhs(void) const
+{
+    debugmsg("ex rhs()",LOGLEVEL_MEMBER_FUNCTION);
+    GINAC_ASSERT(is_ex_of_type(*this,relational));
+    return (*static_cast<relational *>(bp)).rhs();
+}
+
 #ifndef INLINE_EX_CONSTRUCTORS
 int ex::compare(const ex & other) const
 {