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Implements \mathchoice command (#969)

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This PR implements `\mathchoice` function.
I once created PR on the wrong branch. Sorry for the mess.

This is particularly useful when one defines custom macro for "big operators".
For example:

```latex
\newcommand{\infdisj}{%
  \mathop{%
    \mathchoice{% display
      \bigvee\hspace{-2ex}\bigvee%
    }{          % inline
      \bigvee\hspace{-1.75ex}\bigvee%
    }{          % script
      \bigvee\hspace{-1.4ex}\bigvee%
    }{          % scriptscript
      \bigvee\hspace{-1ex}\bigvee%
}}}
```
This commit is contained in:
Hiromi Ishii
2017-11-22 21:34:05 +09:00
committed by Erik Demaine
parent 2d32263998
commit 6f1661f7da
8 changed files with 245 additions and 0 deletions
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2
test/screenshotter/ss_data.yaml
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@@ -144,6 +144,8 @@ LowerAccent: |
\end{matrix}
MathAtom: a\mathrel{\mathop{=}\limits^{\blue ?}}b
MathAtom2: \mathop{\overline{\mathrm{lim}}}\limits_{x\to\infty}f(x)
MathChoice: |
{\displaystyle\mathchoice{D}{T}{S}{SS}} {\textstyle\mathchoice{D}{T}{S}{SS}} {\scriptstyle \mathchoice{D}{T}{S}{SS}} {\scriptscriptstyle\mathchoice{D}{T}{S}{SS}} \displaystyle X_{\mathchoice{D}{T}{S}{SS}_{\mathchoice{D}{T}{S}{SS}}}
MathDefaultFonts: Ax2k\breve{a}\omega\Omega\imath+\KaTeX
MathBb: \mathbb{Ax2k\breve{a}\omega\Omega\imath+\KaTeX}
MathBf: \mathbf{Ax2k\breve{a}\omega\Omega\imath+\KaTeX}