Enforce at least one case

Author: rattrayalex

src/plugins/lightscript.js

@@ -587,6 +587,10 @@ pp.parseMatch = function (node, isExpression) {
     node.cases.push(matchCase);
   }
 
+  if (!node.cases.length) {
+    this.unexpected(null, tt.bitwiseOR);
+  }
+
   return this.finishNode(node, isExpression ? "MatchExpression" : "MatchStatement");
 };
 

test/fixtures/lightscript/match/illegal-no-cases/actual.js

@@ -0,0 +1 @@
+match x:

test/fixtures/lightscript/match/illegal-no-cases/options.json

@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token, expected | (1:8)"
+}