blob: 89de7174fcb8c016535a6c86c522a0e618e5c730 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/**
* @fileoverview Rule to disallow a duplicate case label.
* @author Dieter Oberkofler
* @copyright 2015 Dieter Oberkofler. All rights reserved.
*/
"use strict";
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = function(context) {
/**
* Get a hash value for the node
* @param {ASTNode} node The node.
* @returns {string} A hash value for the node.
* @private
*/
function getHash(node) {
if (node.type === "Literal") {
return node.type + typeof node.value + node.value;
} else if (node.type === "Identifier") {
return node.type + typeof node.name + node.name;
} else if (node.type === "MemberExpression") {
return node.type + getHash(node.object) + getHash(node.property);
}
}
var switchStatement = [];
return {
"SwitchStatement": function(/*node*/) {
switchStatement.push({});
},
"SwitchStatement:exit": function(/*node*/) {
switchStatement.pop();
},
"SwitchCase": function(node) {
var currentSwitch = switchStatement[switchStatement.length - 1],
hashValue;
if (node.test) {
hashValue = getHash(node.test);
if (typeof hashValue !== "undefined" && currentSwitch.hasOwnProperty(hashValue)) {
context.report(node, "Duplicate case label.");
} else {
currentSwitch[hashValue] = true;
}
}
}
};
};
|
