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POApply different scopes to the same character in a Sublime Text syntax definition file
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copied!<p>I'm trying to create a new <code>.tmLanguage</code> file for Sublime Text 2 that defines special fenced code blocks for <a href="http://yihui.name/knitr/" rel="nofollow noreferrer">knitr</a> and Markdown. These blocks take this form:</p> <pre><code>```{r example_chunk, echo=true} x <- rnorm(100) y <- rnorm(100) plot(y ~ x, pch=20) ``` </code></pre> <p>There are two sections: (1) the parameters (<code>{r ...}</code>) and (2) the actual embedded code (between the closing <code>}</code> and the ``` at the end). There are four scopes that need to be applied to delineate the two sections:</p> <ul> <li><code>punctuation.definition.parameters.begin.knitr</code></li> <li><code>punctuation.definition.parameters.end.knitr</code></li> <li><code>punctuation.section.embedded.begin.knitr</code></li> <li><code>punctuation.section.embedded.end.knitr</code></li> </ul> <p>Using regular expressions to peg these scopes to parts of code is easy enough (partial code available <a href="https://gist.github.com/6302774" rel="nofollow noreferrer">here</a>). However, two of these scopes need to be applied to the same single character: the final <code>}</code> in the parameters section, which ends the parameters and signifies the beginning of the fenced/embedded code.</p> <p><img src="https://i.stack.imgur.com/k3z8C.png" alt="enter image description here"></p> <p>However, it appears to be impossible to assign two scopes to the same character in a .tmLanguage file. It's not possible to end the parameters section and begin the embedded section. The first scope defined takes precedence, thus breaking the syntax highlighting.</p> <p>Is there a way to use a <code>.tmLanguage</code> syntax definition to apply two different scopes to the same character in Sublime Text? If not, is there some way I can peg <code>punctuation.definition.parameters.end.knitr</code> and <code>punctuation.section.embedded.begin.knitr</code> to two different somethings instead of the single <code>{</code>? (Keeping in mind that I can't add additional characters to the code block.)</p>

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