ESTree compatible AST builder for Javascript and Typescript.
All builder code was fully-generated from ESTree spec
npm install estel-estree-builderconst builder = require('estel-estree-builder');
const escodegen = require('escodegen');
const ast = builder.functionDeclaration(
builder.identifier('helloWorld'),
[builder.identifier('name')],
builder.functionBody([
builder.returnStatement(
builder.binaryExpression(
'+',
builder.literal('Hello'),
builder.identifier('name')
)
)
])
)
console.log(escodegen.generate(ast));This example generates the following code:
function helloWorld(name) {
return 'Hello' + name;
}By default, the builder can generate AST with ES2018-features (inclusive ES5/2015/2016/2017 features), but you can choose ES-version:
const es2018builder = require('estel-estree-builder/generated/es2018'); // es5-es2018
const es2015builder = require('estel-estree-builder/generated/es2015'); // es5-es2015
const es5builder = require('estel-estree-builder/generated/es5'); // es5You can also use builder in Typescript:
import es2018builder from 'estel-estree-builder/generated/es2018.ts'; // es5-es2018
import es2015builder from 'estel-estree-builder/generated/es2015.ts'; // es5-es2015
import es5builder from 'estel-estree-builder/generated/es5.ts'; // es5The generator is a script that parses ESTree spec and generates the builder source files (JS or/and TS).
git clone https://github.com/smelukov/estel-estree-builder
cd estel-estree-builder
git submodule init
git submodule update
npm install
npm run generateThis will create generated directory and put a generated builder sources to it.
There are some options for generator:
-t - target source type (default is [js, ts])
jsts
-es - es-features that will be support generated builder (default is [es2018])
es5es2015es2016es2017es2018
-o - output folder (default is generated)
For exmaple, npm run generate -- -es es5 es2015 es2018 -t ts -o types will generate builder typescript-sources in types directory that support all es5+ features.
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