36 lines
635 B
JavaScript
36 lines
635 B
JavaScript
// @flow
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import {invariant} from '../utils';
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import type {Type} from '../types';
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import {createNumber, isRepr} from '../types';
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export type Pragma =
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| TypePragma
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;
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export type TypePragma = {
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kind: 'type',
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value: Type,
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};
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const PRAGMA_RE = /^\s*@repr\s+\{\s*(.+?)\s*\}\s*$/gm;
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export function extractPragmas(text: string): Pragma[] {
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const pragmas = [];
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let match;
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while ((match = PRAGMA_RE.exec(text))) {
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const repr = match[1];
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invariant(isRepr(repr));
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pragmas.push({
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kind: 'type',
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value: createNumber(repr),
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});
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}
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return pragmas;
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}
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