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[morph.ai] Fixed PLAYGROUND-PR-3278 -- Add support for TypeScript generics with extends keyword #49

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[morph.ai] Fixed PLAYGROUND-PR-3278 -- Add support for TypeScript generics with extends keyword #49

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17 changes: 17 additions & 0 deletions src/languages/typescript.js
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Original file line number Diff line number Diff line change
Expand Up @@ -74,10 +74,24 @@ export default function(hljs) {
Object.assign(tsLanguage.keywords, KEYWORDS);

tsLanguage.exports.PARAMS_CONTAINS.push(DECORATOR);

const GENERIC_TYPE_PARAMETER = {
className: 'type-parameter',
begin: /</, end: />/,
contains: [{
className: 'type-parameter-name',
begin: IDENT_RE,
keywords: {
keyword: 'extends'
}
}]
};

tsLanguage.contains = tsLanguage.contains.concat([
DECORATOR,
NAMESPACE,
INTERFACE,
GENERIC_TYPE_PARAMETER
]);

// TS gets a simpler shebang rule than JS
Expand All @@ -86,6 +100,9 @@ export default function(hljs) {
swapMode(tsLanguage, "use_strict", USE_STRICT);

const functionDeclaration = tsLanguage.contains.find(m => m.label === "func.def");
if (functionDeclaration && functionDeclaration.contains) {
functionDeclaration.contains.push(GENERIC_TYPE_PARAMETER);
}
functionDeclaration.relevance = 0; // () => {} is more typical in TypeScript

Object.assign(tsLanguage, {
Expand Down