[Tex/LaTex] Latex symbol for right arrow with circular and diamond shaped tail

Question

I want to create a right arrow with a circle on its tail and a diamond on its tail. How is it possible? Please help.

Answer 1

I understood the question in the way, that one arrow should have a circle and a diamond at its tail.

\documentclass{article}
\usepackage{amsmath}
\usepackage{tikz}
\usetikzlibrary{arrows}
\pgfarrowsdeclarecombine*{ring and diamond}{ring and diamond}{open diamond}{open diamond}{o}{o}
\DeclareMathOperator{\ringdiamondarrow}{\raisebox{0.5ex}{\tikz[baseline]{\draw[ring and diamond->](0,0)--(2em,0);}}}
\begin{document}
\(a\ringdiamondarrow b\)
\end{document}