Joseph Frazier
a78d1389f6
* Add comments showing parser arguments Since this is how they are invoked, the comments make it easier to maintain. * Use babylon.parseExpression for JSON See https://github.com/prettier/prettier/issues/2378#issuecomment-314600778 Note that this doesn't yet print comments: echo '{/*comment*/"K":"V"}' | ./bin/prettier.js --parser json * Remove parser-json.js This reduces duplicate code in the built package. See https://github.com/prettier/prettier/pull/2476#pullrequestreview-50181398 * Add test with block comment in JSON * Fix test with block comment in JSON * Add test with line comment in JSON * Don't build now-redundant parser-json.js
66 lines
1.6 KiB
JavaScript
66 lines
1.6 KiB
JavaScript
"use strict";
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const createError = require("./parser-create-error");
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const includeShebang = require("./parser-include-shebang");
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function parse(text /*, parsers, opts*/) {
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const jsx = isProbablyJsx(text);
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let ast;
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try {
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try {
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// Try passing with our best guess first.
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ast = tryParseTypeScript(text, jsx);
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} catch (e) {
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// But if we get it wrong, try the opposite.
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/* istanbul ignore next */
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ast = tryParseTypeScript(text, !jsx);
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}
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} catch (e) /* istanbul ignore next */ {
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if (typeof e.lineNumber === "undefined") {
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throw e;
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}
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throw createError(e.message, {
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start: { line: e.lineNumber, column: e.column + 1 }
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});
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}
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delete ast.tokens;
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includeShebang(text, ast);
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return ast;
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}
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function tryParseTypeScript(text, jsx) {
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// While we are working on typescript, we are putting it in devDependencies
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// so it shouldn't be picked up by static analysis
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const parser = require("typescript-eslint-parser");
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return parser.parse(text, {
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loc: true,
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range: true,
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tokens: true,
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comment: true,
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useJSXTextNode: true,
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ecmaFeatures: { jsx },
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// Override logger function with noop,
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// to avoid unsupported version errors being logged
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loggerFn: () => {}
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});
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}
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/**
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* Use a naive regular expression until we address
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* https://github.com/prettier/prettier/issues/1538
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*/
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function isProbablyJsx(text) {
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return new RegExp(
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[
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"(^[^\"'`]*</)", // Contains "</" when probably not in a string
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"|",
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"(^[^/]{2}.*/>)" // Contains "/>" on line not starting with "//"
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].join(""),
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"m"
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).test(text);
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}
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module.exports = parse;
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