Re: YAML block to carry LaTeX font details -- how do I preserve '{' and ‘}‘ ?

[John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org>]

See BP Johnson's suggestions (recently in this list) about
using a dummy latex macro to protect text from being
interpreted as Markdown.

+++ kurt.pfeifle via pandoc-discuss [Apr 09 16 15:34 ]:
>   I am starting to experience with YAML blocks, so that I store as many
>   as possible source-specific Pandoc command line options and variables
>   within the Markdown source file for easier reproducability at a later
>   stage.
>
>   Most things which I currently use work file, except one (which is:
>   successfully passing some font features into the LaTeX output).
>
>   Here is my complete YAML block:
>---
>title: Some Document
>subtitle:
>    - This is a test for using YAML for metadata.
>author:
>    - name: Some Name
>      affiliation: University of Somewhere
>    - name: Some Other Name
>      affiliation: University of Nowhere
>date: 2016-04-10
>toc: yes
>numbersections: yes
>toc-depth: 3
>geometry:
>    - paperwidth=595pt
>    - paperheight=842pt
>    - showframe=false
>    - showcrop=false
>    - hmargin=72pt
>    - headsep=54pt
>    - top=66pt
>    - bottom=78pt
>author-meta:  "Some Name, Some GmbH"
>subject-meta:  "Knowledge-Based Information Extraction"
>title-meta:  "Some Phantasy Title"
>pdfstartpage: 2
>keywords:  "Essay, Important, Difficult"
>fontsize: 12pt
>lang: de
>mainfont: WeidemannBook
>mainfontoptions:  BoldFont=WeidemannStd-Bold.otf, ItalicFont=WeidemannBookItalic
>.otf, BoldItalicFont=WeidemannStd-BoldItalic.otf, ItalicFeatures=Colour=AA0000,
>BoldFeatures={Colour=0000AA}, BoldItalicFeatures={Colour=AA00AA}
>monofont:  Letter Gothic Std
>monofontoptions: [ Scale=0.8, Colour=AA0000, Numbers=Lining, Numbers=SlashedZero
>, ]
>documentclass: scrartcl
>header-includes:
>...
>
>   My problem is with this line:
>mainfontoptions:  BoldFont=WeidemannStd-Bold.otf, ItalicFont=WeidemannBookItalic
>.otf, BoldItalicFont=WeidemannStd-BoldItalic.otf, ItalicFeatures=Colour=AA0000,
>BoldFeatures={Colour=0000AA}, BoldItalicFeatures={Colour=AA00AA}
>
>   In LaTeX the output becomes:
>\setmainfont[BoldFont=WeidemannStd-Bold.otf,
>  ItalicFont=WeidemannBookItalic.otf,
>  BoldItalicFont=WeidemannStd-BoldItalic.otf,
>  ItalicFeatures=\{Colour=AA0000\},
>  BoldFeatures=\{Colour=0000AA\},
>  BoldItalicFeatures=\{Colour=AA00AA\}]{WeidemannBook}
>
>   This does not compile to PDF and gives this error:
>! LaTeX error: "kernel/misplaced-equals-sign"
>....
>LaTeX is attempting to parse some key-value input but found two equals signs not
> separated by a comma.
>
>   If I remove the backslashes which escape the curly braces, like so:
>\setmainfont[BoldFont=WeidemannStd-Bold.otf,
>  ItalicFont=WeidemannBookItalic.otf,
>  BoldItalicFont=WeidemannStd-BoldItalic.otf,
>  ItalicFeatures={Colour=AA0000},
>  BoldFeatures={Colour=0000AA},
>  BoldItalicFeatures={Colour=AA00AA}]{WeidemannBook}
>
>   then the code compiles and works as expected — I get different colors
>   for bold, italic and bold-italic text:
>
>   [1][1.png]
>
>   How can I get the required curly braces into the LaTeX output
>   un-escaped from setting it up in the YAML block?
>
>   Or is there an alternative way to get my wanted main font `*Features`
>   to work?
>
>   Thanks, Kurt
>   ​
>
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