constant-folding
Small utility, applies constant-folding in source (javascript) code, using AST modification.
Installation
npm install @alu0101051420/constant-folding
Usage from code:
const constantFolding = require('constant-folding');
const example_code = "a = 3+2;"
console.log("Original Code: \n", example_code);
console.log("Code with constant folding: \n", constantFolding(example_code));The documentation of the function.
Usage as executable:
An input file must be specified. You also may or may not specify an output file. If not given, it will default to "output.js".
npx cf input_file --o output_file
Examples
constantFolding(`['a', 'b', 'c'].concat(['d', 'e'], 'f', 'g', ['h']); `); // ['a','b','c','d','e','f','g','h']
constantFolding(`["a", "b", "c"].join(); `); // a,b,c
constantFolding(`["a", "b", "c"].join('&'); `); // a&b&c
constantFolding(`[1, 2, 3].length; `); // 3
constantFolding(`[1, 2, 3][2 - 1]; `); // 2
constantFolding(`[1, 2, 3].shift(); `); // 1
constantFolding(`[1, 2, 3].slice(0, 1 + 1); `); // [1, 2]
constantFolding(`['a', 'b', 'c'].pop(); `); // c
constantFolding(`['a', 'b', 'c'].reverse(); `); // ['c','b','a']Author
alu0101051420 (Nicolás Cabrera) - GitHub Profile
Tests
npm run test
Version History
1.0.0 Initial Release
1.1.0 Added npx executable
1.1.1 Minor documentation fixes
1.2.0 Added constant folding for array functions