ember-legacy-class-transform/.node_modules.ember-try/@glimmer/syntax/dist/commonjs/es2017/lib/utils.js

The default blueprint for ember-cli addons.

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.parseElementBlockParams = parseElementBlockParams;
exports.childrenFor = childrenFor;
exports.appendChild = appendChild;
exports.isLiteral = isLiteral;
exports.printLiteral = printLiteral;

var _syntaxError = require('./errors/syntax-error');

var _syntaxError2 = _interopRequireDefault(_syntaxError);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

// Regex to validate the identifier for block parameters.
// Based on the ID validation regex in Handlebars.
let ID_INVERSE_PATTERN = /[!"#%-,\.\/;->@\[-\^`\{-~]/;
// Checks the element's attributes to see if it uses block params.
// If it does, registers the block params with the program and
// removes the corresponding attributes from the element.
function parseElementBlockParams(element) {
    let params = parseBlockParams(element);
    if (params) element.blockParams = params;
}
function parseBlockParams(element) {
    let l = element.attributes.length;
    let attrNames = [];
    for (let i = 0; i < l; i++) {
        attrNames.push(element.attributes[i].name);
    }
    let asIndex = attrNames.indexOf('as');
    if (asIndex !== -1 && l > asIndex && attrNames[asIndex + 1].charAt(0) === '|') {
        // Some basic validation, since we're doing the parsing ourselves
        let paramsString = attrNames.slice(asIndex).join(' ');
        if (paramsString.charAt(paramsString.length - 1) !== '|' || paramsString.match(/\|/g).length !== 2) {
            throw new _syntaxError2.default('Invalid block parameters syntax: \'' + paramsString + '\'', element.loc);
        }
        let params = [];
        for (let i = asIndex + 1; i < l; i++) {
            let param = attrNames[i].replace(/\|/g, '');
            if (param !== '') {
                if (ID_INVERSE_PATTERN.test(param)) {
                    throw new _syntaxError2.default('Invalid identifier for block parameters: \'' + param + '\' in \'' + paramsString + '\'', element.loc);
                }
                params.push(param);
            }
        }
        if (params.length === 0) {
            throw new _syntaxError2.default('Cannot use zero block parameters: \'' + paramsString + '\'', element.loc);
        }
        element.attributes = element.attributes.slice(0, asIndex);
        return params;
    }
    return null;
}
function childrenFor(node) {
    switch (node.type) {
        case 'Program':
            return node.body;
        case 'ElementNode':
            return node.children;
    }
}
function appendChild(parent, node) {
    childrenFor(parent).push(node);
}
function isLiteral(path) {
    return path.type === 'StringLiteral' || path.type === 'BooleanLiteral' || path.type === 'NumberLiteral' || path.type === 'NullLiteral' || path.type === 'UndefinedLiteral';
}
function printLiteral(literal) {
    if (literal.type === 'UndefinedLiteral') {
        return 'undefined';
    } else {
        return JSON.stringify(literal.value);
    }
}
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