Simplified type helper for JS Refactor example source types

typeHelperExample.js

'use strict';

const signet = require('signet')();


(function () {

    signet.defineDuckType('astPosition', {
        line: 'leftBoundedInt<1>',
        column: 'leftBoundedInt<0>'
    });

    signet.defineDuckType('astCoords', {
        start: 'astPosition',
        end: 'astPosition'
    });

    signet.alias('selectionCoords', 'astCoords');

    signet.defineDuckType('astNode', {
        type: '?string',
        loc: 'astCoords'
    });

    signet.alias('nodeTypes', 'array<string>');

    signet.defineDuckType('traversalOptions', {
        enter: '?function<astNode => undefined>',
        leave: '?function<astNode => undefined>'
    });

})();


function errorBuilder(validationResult, args, signatureTree, functionName) {
    const defaultError = signet.buildInputErrorMessage(validationResult, args, signatureTree, functionName);
    return defaultError + '\n\nJS Refactoring types are defined in the typeHelper file; more info can be found in type definitions.';
}

function enforce(signature, fn) {
    return signet.enforce(signature, fn, {
        inputErrorBuilder: errorBuilder,
        outputErrorBuilder: errorBuilder
    });
}

function typeHelper() {
    return {
        enforce: enforce,
        isTypeOf: signet.isTypeOf
    };
}

module.exports = typeHelper;