84 lines
2.3 KiB
JavaScript
84 lines
2.3 KiB
JavaScript
/**
|
|
* @fileoverview Rule to check for the position of the * in your generator functions
|
|
* @author Jamund Ferguson
|
|
* @copyright 2014 Jamund Ferguson. All rights reserved.
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
var parse = require('../helpers').parse
|
|
|
|
module.exports = function(context) {
|
|
|
|
var position = context.options[0] || "end";
|
|
|
|
function isAsyncGenerator(node){
|
|
return context.getFirstToken(node, 2).value === '*'
|
|
}
|
|
|
|
/**
|
|
* Check the position of the star compared to the expected position.
|
|
* @param {ASTNode} node - the entire function node
|
|
* @returns {void}
|
|
*/
|
|
function checkStarPosition(node) {
|
|
|
|
var first = context.getFirstToken(node)
|
|
, isAsync = first.value === 'async'
|
|
, starToken;
|
|
|
|
|
|
if (!node.generator || (isAsync && !isAsyncGenerator(node))) {
|
|
return;
|
|
}
|
|
|
|
// Blocked, pending decision to fix or work around in eslint/espree#36
|
|
if (context.getAncestors().pop().method) {
|
|
return;
|
|
}
|
|
|
|
starToken = context.getFirstToken(node, isAsync ? 2 : 1);
|
|
|
|
//console.log(declaration, starToken)
|
|
|
|
// check for function *name() {}
|
|
if (position === "end") {
|
|
if (starToken.range[1] !== context.getTokenAfter(starToken).range[0]) {
|
|
// * starts where the next identifier begins
|
|
context.report(node, "Expected a space before *.");
|
|
}
|
|
}
|
|
|
|
// check for function* name() {}
|
|
if (position === "start") {
|
|
|
|
// * begins where the previous identifier ends
|
|
if (starToken.range[0] !== context.getTokenBefore(starToken).range[1]) {
|
|
context.report(node, "Expected no space before *.");
|
|
}
|
|
}
|
|
|
|
// check for function * name() {}
|
|
if (position === "middle") {
|
|
|
|
// must be a space before and afer the *
|
|
if (starToken.range[0] <= context.getTokenBefore(starToken).range[1] ||
|
|
starToken.range[1] >= context.getTokenAfter(starToken).range[0]) {
|
|
context.report(node, "Expected spaces around *.");
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
return {
|
|
"FunctionDeclaration": checkStarPosition,
|
|
"FunctionExpression": checkStarPosition
|
|
};
|
|
|
|
};
|
|
|
|
module.exports.schema = [
|
|
{
|
|
"enum": ["start", "middle", "end"]
|
|
}
|
|
]; |