87 lines
2.4 KiB
JavaScript
87 lines
2.4 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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/*global exports:true*/
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'use strict';
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var util = require('util');
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var Syntax = require('esprima-fb').Syntax;
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var utils = require('jstransform/src/utils');
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var parse = require('./TypeExpressionParser').parse;
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var compile = require('./TypeExpressionParser').compile;
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var normalize = require('./TypeExpressionParser').normalize;
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function parseAndNormalize(source, name, object) {
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if (/\?$/.test(source)) {
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source = '?' + source.substring(0, source.length - 1);
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}
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try {
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var ast = parse(source);
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return compile(normalize(ast));
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} catch (e) {
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var functionName = object.id
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? '`' + object.id.name + '\''
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: '<anonymous>';
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throw new Error(util.format('The type `%s\' specified for %s for ' +
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'the function %s, on line %s, could not be parsed. The error given was: %s',
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source, name, functionName, object.loc.start.line, e.message
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));
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}
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}
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function initializeSettings(state, pragmas) {
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state.g.typechecks = 'typechecks' in pragmas;
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state.g.staticOnly = pragmas.typechecks === 'static-only';
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}
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function shouldTraverseFile(state, pragmas) {
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if (state.g.typechecks === undefined) {
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initializeSettings(state, pragmas);
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}
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return state.g.typechecks;
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}
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function shouldTransformFile(state, pragmas) {
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if (state.g.typechecks === undefined) {
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initializeSettings(state, pragmas);
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}
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return !state.g.staticOnly && state.g.typechecks;
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}
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function shouldTransformFunction(node, state, pragmas, params) {
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if (!shouldTransformFile(state, pragmas)) {
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throw new Error(
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'shouldTransformFunction should not be called if shouldTransformFile ' +
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'fails'
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);
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}
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return (params.params && params.params.length > 0) ||
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params.returns ||
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(node.id && /^[A-Z]/.test(node.id.name));
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}
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function wrapsBody() {
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return true;
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}
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function annotates() {
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return true;
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}
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exports.parseAndNormalize = parseAndNormalize;
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exports.shouldTransformFile = shouldTransformFile;
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exports.shouldTraverseFile = shouldTraverseFile;
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exports.shouldTransformFunction = shouldTransformFunction;
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exports.wrapsBody = wrapsBody;
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exports.annotates = annotates;
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exports.name = 'typechecks';
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