[macros,numerics] Add and use numbered 'formula' environment

Fixes ISO/CS comment (C++23 proof)

Author: jensmaurer

source/macros.tex

@@ -614,6 +614,17 @@
 \newcommand{\atsign}{@}
 \makeatother
 
+%%--------------------------------------------------
+%% Formulae
+%%--------------------------------------------------
+
+% usage: \begin{formula}{XREF}
+\newenvironment{formula}[1]
+{\begin{equation}\label{eq:#1}}
+{\end{equation}}
+
+\renewcommand{\eqref}[1]{Formula \nolinebreak[3] \hyperref[eq:#1]{\ref*{eq:#1}}}
+
 %%--------------------------------------------------
 %% Indented text
 %%--------------------------------------------------