Shift Traverse
December 24, 2014 · View on GitHub
About
This module provides traversal functionality similar to estraverse for a Shift format AST.
Installation
npm install shift-traverse
Usage
traverse
// In ES6, but you can use it under ES5 environment.
import {traverse} from "shift-traverse"
traverse(tree, {
enter(node) {
console.log(`entering ${node.type}`);
},
leave(node) {
console.log(`leaving ${node.type}`);
}
});
replace
import parse from 'shift-parser'
import codegen from "shift-codegen";
import { LiteralStringExpression } from "shift-ast";
import { replace, Syntax } from '../'
let code = `
function test() {
console.log("HELLO WORLD");
}
`;
let tree = parse(code);
let transformed = replace(tree, {
enter(node, parent) {
if (node.type === Syntax.LiteralStringExpression) {
return new LiteralStringExpression('ご注文はうさぎですか？');
}
}
});
assert(codegen(transformed) === `function test(){console.log("ご注文はうさぎですか？")}`);
License
Copyright (C) 2012-2014 Yusuke Suzuki (twitter: @Constellation) and other contributors.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
-
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
-
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL