P0220R1: optional (section 5)

Author: zygoloid

source/tables.tex

@@ -658,3 +658,41 @@
 {
  \end{longlibtab2}
 }
+
+% usage: \begin{lib2dtab}{TITLE}{XREF}{HDR1}{HDR2}
+% produces a table with one heading column followed by 2 data columns.
+% used for 2D requirements tables, such as optional::operator= effects
+% tables.
+\newenvironment{lib2dtab2}[4]
+{
+ %% no lines in the top-left cell, and leave a gap around the headers
+ %% FIXME: I tried to use hhline here, but it doesn't appear to support
+ %% the join between the leftmost top header and the topmost left header,
+ %% so we fake it with an empty row and column.
+ \newcommand{\topline}{\cline{3-4}}
+ \newcommand{\rowsep}{\cline{1-1}\cline{3-4}}
+ \newcommand{\capsep}{
+  \topline
+  \multicolumn{4}{c}{}\\[-0.8\normalbaselineskip]
+  \rowsep
+ }
+ \newcommand{\bottomline}{\rowsep}
+ \newcommand{\hdstyle}[1]{\textbf{##1}}
+ \newcommand{\rowhdr}[1]{\hdstyle{##1}&}
+ \newcommand{\colhdr}[1]{\multicolumn{1}{|>{\centering}m{1.8in}|}{\hdstyle{##1}}}
+ %% FIXME: figure out a way to reuse floattable here
+ \begin{table}[htbp]
+ \caption{\label{#2}#1}
+ \begin{center}
+ \begin{tabular}{|>{\centering}m{1.2in}|@{}p{0.2\normalbaselineskip}@{}|m{1.8in}|m{1.8in}|}
+ %% table header
+ \topline
+ \multicolumn{1}{c}{}&&\colhdr{#3}&\colhdr{#4}\\
+ \capsep
+}
+{
+ \bottomline
+ \end{tabular}
+ \end{center}
+ \end{table}
+}