ast-redeclare

Hoist and fold variable declarations within scopes, so that each variable has only one declaration per scope. Don’t touch functions. Useful to normalize code before analysis, like data-flow etc.

Usage

npm install ast-redeclare

var parse = require('esprima').parse;
var generate = require('escodegen').generate;
var redeclare = require('ast-redeclare');

var ast = parse(
    'var a = 1, b = 2; if (a > 1) { var c = b; } else {var c = 3;} var d = 4;'
);
ast = redeclare(ast);

generate(ast);
//var a, b, c, d; a = 1; b = 2; if (a > 1) { c = b; } else { c = 3; }; d = 4;

API

redeclare(Node) → Node

Analogs

• ast-hoist
• hoister