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jhr |
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% grammar.hva
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%
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% COPYRIGHT (c) 1999 Bell Labs, Lucent Technologies.
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%
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% HeVeA macro definitions to simulate the grammar.sty commands.
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%
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\newboolean{GGanchors} % true means lhs nonterm is anchor
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\newboolean{GGfirstrule}
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\newboolean{GGfirstrhs}
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\newcommand{\GGfirstcell}{
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\@open{TD}{WIDTH="20"}
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\@close{TD}
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}
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\newcommand{\GGsepsymb}{
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\GGfirstcell{}
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\ifthenelse{\boolean{GGfirstrhs}}{
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\@open{TD}{ALIGN=CENTER VALIGN=BOTTOM}
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::=
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\@close{TD}
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\setboolean{GGfirstrhs}{false}
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}{
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\@open{TD}{ALIGN=CENTER VALIGN=BOTTOM}
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\@close{TD}
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}
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}
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\newcommand{\GGRHS}[2][]{
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\@open{TR}{}
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\GGsepsymb{}
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\@open{TD}{NOWRAP VALIGN=BOTTOM}
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#2
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\@close{TD}
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\@open{TD}{ALIGN=RIGHT VALIGN=TOP}
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#1
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\@close{TD}
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\@close{TR}
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}
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\newcommand{\GGCONT}[1]{
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\@open{TR}{}
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\@open{TD}{COLSPAN="2"}
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\@close{TD}
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\@open{TD}{NOWRAP VALIGN=BOTTOM}
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\@print{ }
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#1
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\@close{TD}
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\@close{TR}
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}
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\newcommand{\GGITEM}[1]{%
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\ifthenelse{\boolean{GGfirstrhs}}{\setboolean{GGfirstrhs}{false}}{
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\@print{ | }
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}%
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#1
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}
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%
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% font commands
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\newcommand{\kw}[1]{{\@style{B}{\@style{TT}#1}}}
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\newcommand{\GGnt}[1]{{\@style{I}#1}}
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\newcommand{\nt}[1]{\GGnt{\url{\#nt:#1}{#1}}}
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\newcommand{\term}[1]{{\@style{I}#1}}
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\newcommand{\sym}[1]{\kw{#1}}
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\newenvironment{Grammar}[1][]{%
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\setboolean{GGanchors}{\equal{#1}{anchors}}%
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\setboolean{GGfirstrule}{true}%
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\newcommand{\GRP}[1]{$(\text{##1})$}%
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\newcommand{\OPT}[1]{$\text{\protect{##1}}^{\textit{opt}}$}%
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\newcommand{\OPTGRP}[1]{$(\text{##1})^{\textit{opt}}$}%
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\newcommand{\LIST}[1]{$\text{\protect{##1}}^{*}$}%
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\newcommand{\LISTGRP}[1]{$(\text{##1})^{*}$}%
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\newcommand{\LISTONE}[1]{$\text{\protect{##1}}^{+}$}%
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\newcommand{\LISTONEGRP}[1]{$(\text{##1})^{+}$}%
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\newenvironment{Rules}[1]{%
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\setboolean{GGfirstrhs}{true}%
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\newcommand{\RHS}{\GGRHS}%
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\newcommand{\CONT}{\GGCONT}%
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\ifthenelse{\boolean{GGfirstrule}}{
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\setboolean{GGfirstrule}{false}%
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}{
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\@open{TR}{}
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\@open{TD}{}\@print{ }\@close{TD}
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\@close{TR}
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}
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\@open{TR}{}
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\@open{TD}{ALIGN=LEFT COLSPAN="3"}
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\ifthenelse{\boolean{GGanchors}}{\anchor{nt:##1}}{}
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\GGnt{##1}
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\@close{TD}
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\@close{TR}
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}{%
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}
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\newenvironment{OneOfRule}[1]{%
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\setboolean{GGfirstrhs}{true}%
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\newcommand{\ITEM}{\GGITEM}%
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\ifthenelse{\boolean{GGfirstrule}}{}{
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\@open{TR}{}
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\@open{TD}{}\@print{ }\@close{TD}
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\@close{TR}
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}
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\@open{TR}{}
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\@open{TD}{ALIGN=LEFT COLSPAN="3"}
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\ifthenelse{\boolean{GGanchors}}{\anchor{nt:##1}}{}
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\GGnt{##1}
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\@close{TD}
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\@close{TR}
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\@open{TR}{}
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\GGfirstcell{}
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\@open{TD}{ALIGN=CENTER VALIGN=BOTTOM}
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::=
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\@close{TD}
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\@open{TD}{}
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}{%
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\@close{TD}
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\@close{TR}
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}
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\@open{TABLE}{}
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}{%
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\@close{TABLE}
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}
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