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13 lines
496 B
TeX
13 lines
496 B
TeX
\newenvironment{grammar}
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{\begingroup
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\def\orbar{\hbox to 2em{\hfil}$\vert$\hbox to .75em{\hfil}}
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\def\nobar{\hbox to 2em{\hfil}\phantom{$\vert$}\hbox to .75em{\hfil}}
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\def\longis{ $\longrightarrow$\hbox to .75em{\hfil}}
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\penalty-100\vskip 6pt plus 1pt\parindent=0pt\interlinepenalty=5000}
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{\penalty-200\vskip6pt plus 1pt\endgroup}
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\def\bar{$\vert$}
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\def\ang#1{$\langle${\small\rm{}#1}$\rangle$}
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\def\kstar{\raise.5ex\hbox{\scheme{*}}}
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\def\kplus{\raise.5ex\hbox{\scheme{+}}}
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