58 lines
1.4 KiB
JavaScript
58 lines
1.4 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
const fill = require('fill-range');
|
||
|
|
const utils = require('./utils');
|
||
|
|
|
||
|
|
const compile = (ast, options = {}) => {
|
||
|
|
let walk = (node, parent = {}) => {
|
||
|
|
let invalidBlock = utils.isInvalidBrace(parent);
|
||
|
|
let invalidNode = node.invalid === true && options.escapeInvalid === true;
|
||
|
|
let invalid = invalidBlock === true || invalidNode === true;
|
||
|
|
let prefix = options.escapeInvalid === true ? '\\' : '';
|
||
|
|
let output = '';
|
||
|
|
|
||
|
|
if (node.isOpen === true) {
|
||
|
|
return prefix + node.value;
|
||
|
|
}
|
||
|
|
if (node.isClose === true) {
|
||
|
|
return prefix + node.value;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (node.type === 'open') {
|
||
|
|
return invalid ? (prefix + node.value) : '(';
|
||
|
|
}
|
||
|
|
|
||
|
|
if (node.type === 'close') {
|
||
|
|
return invalid ? (prefix + node.value) : ')';
|
||
|
|
}
|
||
|
|
|
||
|
|
if (node.type === 'comma') {
|
||
|
|
return node.prev.type === 'comma' ? '' : (invalid ? node.value : '|');
|
||
|
|
}
|
||
|
|
|
||
|
|
if (node.value) {
|
||
|
|
return node.value;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (node.nodes && node.ranges > 0) {
|
||
|
|
let args = utils.reduce(node.nodes);
|
||
|
|
let range = fill(...args, { ...options, wrap: false, toRegex: true });
|
||
|
|
|
||
|
|
if (range.length !== 0) {
|
||
|
|
return args.length > 1 && range.length > 1 ? `(${range})` : range;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (node.nodes) {
|
||
|
|
for (let child of node.nodes) {
|
||
|
|
output += walk(child, node);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return output;
|
||
|
|
};
|
||
|
|
|
||
|
|
return walk(ast);
|
||
|
|
};
|
||
|
|
|
||
|
|
module.exports = compile;
|