mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
111 lines
3.0 KiB
111 lines
3.0 KiB
/**
|
|
* @fileoverview A rule to set the maximum depth block can be nested in a function.
|
|
* @author Ian Christian Myers
|
|
* @copyright 2013 Ian Christian Myers. All rights reserved.
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
|
|
module.exports = function(context) {
|
|
|
|
//--------------------------------------------------------------------------
|
|
// Helpers
|
|
//--------------------------------------------------------------------------
|
|
|
|
var functionStack = [],
|
|
maxDepth = context.options[0] || 4;
|
|
|
|
/**
|
|
* When parsing a new function, store it in our function stack
|
|
* @returns {void}
|
|
* @private
|
|
*/
|
|
function startFunction() {
|
|
functionStack.push(0);
|
|
}
|
|
|
|
/**
|
|
* When parsing is done then pop out the reference
|
|
* @returns {void}
|
|
* @private
|
|
*/
|
|
function endFunction() {
|
|
functionStack.pop();
|
|
}
|
|
|
|
/**
|
|
* Save the block and Evaluate the node
|
|
* @param {ASTNode} node node to evaluate
|
|
* @returns {void}
|
|
* @private
|
|
*/
|
|
function pushBlock(node) {
|
|
var len = ++functionStack[functionStack.length - 1];
|
|
|
|
if (len > maxDepth) {
|
|
context.report(node, "Blocks are nested too deeply ({{depth}}).",
|
|
{ depth: len });
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Pop the saved block
|
|
* @returns {void}
|
|
* @private
|
|
*/
|
|
function popBlock() {
|
|
functionStack[functionStack.length - 1]--;
|
|
}
|
|
|
|
//--------------------------------------------------------------------------
|
|
// Public API
|
|
//--------------------------------------------------------------------------
|
|
|
|
return {
|
|
"Program": startFunction,
|
|
"FunctionDeclaration": startFunction,
|
|
"FunctionExpression": startFunction,
|
|
"ArrowFunctionExpression": startFunction,
|
|
|
|
"IfStatement": function(node) {
|
|
if (node.parent.type !== "IfStatement") {
|
|
pushBlock(node);
|
|
}
|
|
},
|
|
"SwitchStatement": pushBlock,
|
|
"TryStatement": pushBlock,
|
|
"DoWhileStatement": pushBlock,
|
|
"WhileStatement": pushBlock,
|
|
"WithStatement": pushBlock,
|
|
"ForStatement": pushBlock,
|
|
"ForInStatement": pushBlock,
|
|
"ForOfStatement": pushBlock,
|
|
|
|
"IfStatement:exit": popBlock,
|
|
"SwitchStatement:exit": popBlock,
|
|
"TryStatement:exit": popBlock,
|
|
"DoWhileStatement:exit": popBlock,
|
|
"WhileStatement:exit": popBlock,
|
|
"WithStatement:exit": popBlock,
|
|
"ForStatement:exit": popBlock,
|
|
"ForInStatement:exit": popBlock,
|
|
"ForOfStatement:exit": popBlock,
|
|
|
|
"FunctionDeclaration:exit": endFunction,
|
|
"FunctionExpression:exit": endFunction,
|
|
"ArrowFunctionExpression:exit": endFunction,
|
|
"Program:exit": endFunction
|
|
};
|
|
|
|
};
|
|
|
|
module.exports.schema = [
|
|
{
|
|
"type": "integer",
|
|
"minimum": 0
|
|
}
|
|
];
|
|
|