Merge pull request #63 from eslint/issue54

Fix: Allow let/const in switchcase (fixes #54)

Author: nzakas

espree.js

@@ -3997,7 +3997,7 @@ function parseSwitchCase() {
         if (match("}") || matchKeyword("default") || matchKeyword("case")) {
             break;
         }
-        statement = parseStatement();
+        statement = parseSourceElement();
         consequent.push(statement);
     }
 

tests/fixtures/ecma-features/blockBindings/let-in-switchcase.result.js

@@ -0,0 +1,98 @@
+module.exports = {
+    "type": "Program",
+    "body": [
+        {
+            type: 'SwitchStatement',
+            discriminant: {
+                type: 'Identifier',
+                name: 'answer',
+                range: [8, 14],
+                loc: {
+                    start: { line: 1, column: 8 },
+                    end: { line: 1, column: 14 }
+                }
+            },
+            cases: [{
+                type: 'SwitchCase',
+                test: {
+                    type: 'Literal',
+                    value: 42,
+                    raw: '42',
+                    range: [23, 25],
+                    loc: {
+                        start: { line: 1, column: 23 },
+                        end: { line: 1, column: 25 }
+                    }
+                },
+                consequent: [{
+                    type: 'VariableDeclaration',
+                    declarations: [{
+                        type: 'VariableDeclarator',
+                        id: {
+                            type: 'Identifier',
+                            name: 't',
+                            range: [31, 32],
+                            loc: {
+                                start: { line: 1, column: 31 },
+                                end: { line: 1, column: 32 }
+                            }
+                        },
+                        init: {
+                            type: 'Literal',
+                            value: 42,
+                            raw: '42',
+                            range: [35, 37],
+                            loc: {
+                                start: { line: 1, column: 35 },
+                                end: { line: 1, column: 37 }
+                            }
+                        },
+                        range: [31, 37],
+                        loc: {
+                            start: { line: 1, column: 31 },
+                            end: { line: 1, column: 37 }
+                        }
+                    }],
+                    kind: 'let',
+                    range: [27, 38],
+                    loc: {
+                        start: { line: 1, column: 27 },
+                        end: { line: 1, column: 38 }
+                    }
+                }, {
+                    type: 'BreakStatement',
+                    label: null,
+                    range: [39, 45],
+                    loc: {
+                        start: { line: 1, column: 39 },
+                        end: { line: 1, column: 45 }
+                    }
+                }],
+                range: [18, 45],
+                loc: {
+                    start: { line: 1, column: 18 },
+                    end: { line: 1, column: 45 }
+                }
+            }],
+            range: [0, 47],
+            loc: {
+                start: { line: 1, column: 0 },
+                end: { line: 1, column: 47 }
+            }
+        }
+    ],
+    "range": [
+        0,
+        47
+    ],
+    "loc": {
+        "start": {
+            "line": 1,
+            "column": 0
+        },
+        "end": {
+            "line": 1,
+            "column": 47
+        }
+    }
+};

tests/fixtures/ecma-features/blockBindings/let-in-switchcase.src.js

@@ -0,0 +1 @@
+switch (answer) { case 42: let t = 42; break; }