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Diffstat (limited to 'tools/node_modules/eslint/lib/rules/no-duplicate-case.js')
-rw-r--r-- | tools/node_modules/eslint/lib/rules/no-duplicate-case.js | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/lib/rules/no-duplicate-case.js b/tools/node_modules/eslint/lib/rules/no-duplicate-case.js new file mode 100644 index 0000000000..07823f284c --- /dev/null +++ b/tools/node_modules/eslint/lib/rules/no-duplicate-case.js @@ -0,0 +1,43 @@ +/** + * @fileoverview Rule to disallow a duplicate case label. + * @author Dieter Oberkofler + * @author Burak Yigit Kaya + */ + +"use strict"; + +//------------------------------------------------------------------------------ +// Rule Definition +//------------------------------------------------------------------------------ + +module.exports = { + meta: { + docs: { + description: "disallow duplicate case labels", + category: "Possible Errors", + recommended: true + }, + + schema: [] + }, + + create(context) { + const sourceCode = context.getSourceCode(); + + return { + SwitchStatement(node) { + const mapping = {}; + + node.cases.forEach(switchCase => { + const key = sourceCode.getText(switchCase.test); + + if (mapping[key]) { + context.report({ node: switchCase, message: "Duplicate case label." }); + } else { + mapping[key] = switchCase; + } + }); + } + }; + } +}; |