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Add \iff, \implies, \impliedby support. Fix #190.

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* Based on @ronkok's code, but without \mathrel as it's absent
  from amstex.sty.
* Add toBuild tests to ensure these operators expand.
This commit is contained in:
Erik Demaine
2017-05-11 16:03:37 -04:00
parent e4b93379fb
commit 46f34181e3
2 changed files with 16 additions and 1 deletions
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9
src/macros.js
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@@ -21,3 +21,12 @@ defineMacro("\\endgroup", "}");
// \def\overset#1#2{\binrel@{#2}\binrel@@{\mathop{\kern\z@#2}\limits^{#1}}}
defineMacro("\\overset", "\\mathop{#2}\\limits^{#1}");
defineMacro("\\underset", "\\mathop{#2}\\limits_{#1}");
//TODO: When implementing \dots, should ideally add the \DOTSB indicator
// into the macro, to indicate these are binary operators.
// \def\iff{\DOTSB\;\Longleftrightarrow\;}
// \def\implies{\DOTSB\;\Longrightarrow\;}
// \def\impliedby{\DOTSB\;\Longleftarrow\;}
defineMacro("\\iff", "\\;\\Longleftrightarrow\\;");
defineMacro("\\implies", "\\;\\Longrightarrow\\;");
defineMacro("\\impliedby", "\\;\\Longleftarrow\\;");