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<a href="../../index.html">All files</a> / <a href="index.html">src/core</a> bool.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/**
* Bool plugin.
* Converts boolean identifiers to i32 constants, handles declarations with
* type "bool".
*
* @flow
*/
import Syntax from 'walt-syntax';
import type { SemanticPlugin } from '../flow/types';
export default function booleanPlugin(): SemanticPlugin {
return {
semantics() {
const declaration = next => ([decl, context]) => {
if (decl.type === 'bool') {
return next([{ ...decl, type: 'i32' }, context]);
}
return next([decl, context]);
};
return {
[Syntax.Identifier]: next => (args, transform) => {
const [id, context] = args;
if (!(id.value === 'true' || id.value === 'false')) {
return next(args);
}
return transform([
{
...id,
Type: Syntax.Constant,
value: id.value === 'true' ? '1' : '0',
type: 'i32',
},
context,
]);
},
[Syntax.FunctionResult]: next => ([result, context]) => {
if (result.type === 'bool') {
return next([{ ...result, type: 'i32' }, context]);
}
return next([result, context]);
},
[Syntax.Declaration]: declaration,
[Syntax.ImmutableDeclaration]: declaration,
};
},
};
}
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Code coverage
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