2 \railalias{lbrace}{\ttlbrace}
3 \railalias{rbrace}{\ttrbrace}
4 \railalias{llbrace}{\ttlbrace\ttlbrace}
5 \railalias{rrbrace}{\ttrbrace\ttrbrace}
7 \setlength\railextra{3.6ex}
8 \setlength\railboxleft{0.9ex}
9 \setlength\railboxright{0.9ex}
10 \setlength\railovalspace{1.8ex}
11 \setlength\railframespace{1.8ex}
12 \setlength\railtextleft{0.9ex}
13 \setlength\railtextright{0.9ex}
14 \setlength\railnamesep{0.9ex}
16 \setlength\railboxheight{16pt}
17 \setlength\railboxskip{24pt}
18 \setlength\railtextup{5pt}
19 \setlength\railjoinsize{16pt}
21 \def\rail@termfont{\small\ttfamily\upshape}
22 \def\rail@nontfont{\small\rmfamily\upshape}
23 \def\rail@annofont{\small\rmfamily\itshape}
24 \def\rail@namefont{\small\rmfamily\itshape}
25 \def\rail@indexfont{\small\rmfamily\itshape}
26 \newcommand{\railtoken}[1]{{\texttt{#1}}}
27 \newcommand{\railqtoken}[1]{{\textsl{#1}}}
28 \newcommand{\railnonterm}[1]{{\emph{#1}}}
30 \newcommand\indexoutertoken[1]{\index{#1@\railtoken{#1} (outer syntax)|bold}}
31 \newcommand\indexouternonterm[1]{\index{#1@\railnonterm{#1} (outer syntax)|bold}}