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[dcl.attr.grammar] Braces of _balanced-token_ are unaligned #6239

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JohelEGP opened this issue Apr 28, 2023 · 4 comments · Fixed by #6241
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[dcl.attr.grammar] Braces of _balanced-token_ are unaligned #6239

JohelEGP opened this issue Apr 28, 2023 · 4 comments · Fixed by #6241

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@JohelEGP
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1682699200

Could this happen because the braces are escaped in the source?

\nontermdef{balanced-token}\br
    \terminal{(} \opt{balanced-token-seq} \terminal{)}\br
    \terminal{[} \opt{balanced-token-seq} \terminal{]}\br
    \terminal{\{} \opt{balanced-token-seq} \terminal{\}}\br
    \textnormal{any \grammarterm{token} other than a parenthesis, a bracket, or a brace}
@jensmaurer
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jensmaurer commented Apr 28, 2023 •
edited

Hm... Interesting. Maybe "\{" expands to something that kills the alignment.

@tkoeppe
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tkoeppe commented Apr 30, 2023

Very odd, I can't figure out what's going on, either. @godbyk, might you have an idea?

@tkoeppe
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tkoeppe commented Apr 30, 2023

Ah, got it, microtype is causing this.

@tkoeppe
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tkoeppe commented Apr 30, 2023

E.g. see

draft/source/lex.tex

Lines 1034 to 1035 in f52423c

%% Ed. note: character protrusion would misalign various operators.
\microtypesetup{protrusion=false}\obeyspaces

@tkoeppe tkoeppe mentioned this issue Apr 30, 2023
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[lex, expr, dcl.dcl] Disable character protrusion from BNF lines. tkoeppe/draft
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@tkoeppe @JohelEGP @jensmaurer