fix(47492): more detailed parseTryStatement error message (#47504)

* more detailed parseTryStatement error message

* move custom error to diagnosticMessages.json

* update error code

Co-authored-by: mickey-stringer <[email protected]>

Author: mickey-stringer

src/compiler/diagnosticMessages.json

@@ -1409,6 +1409,10 @@
         "category": "Error",
         "code": 1471
     },
+    "'catch' or 'finally' expected.": {
+        "category": "Error",
+        "code": 1472
+    },
 
     "The types of '{0}' are incompatible between these types.": {
         "category": "Error",

src/compiler/parser.ts

@@ -6080,7 +6080,7 @@ namespace ts {
             // one out no matter what.
             let finallyBlock: Block | undefined;
             if (!catchClause || token() === SyntaxKind.FinallyKeyword) {
-                parseExpected(SyntaxKind.FinallyKeyword);
+                parseExpected(SyntaxKind.FinallyKeyword, Diagnostics.catch_or_finally_expected);
                 finallyBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
             }
 

tests/baselines/reference/invalidTryStatements.errors.txt

@@ -1,5 +1,5 @@
 tests/cases/conformance/statements/tryStatements/invalidTryStatements.ts(2,5): error TS1005: 'try' expected.
-tests/cases/conformance/statements/tryStatements/invalidTryStatements.ts(6,12): error TS1005: 'finally' expected.
+tests/cases/conformance/statements/tryStatements/invalidTryStatements.ts(6,12): error TS1472: 'catch' or 'finally' expected.
 tests/cases/conformance/statements/tryStatements/invalidTryStatements.ts(10,5): error TS1005: 'try' expected.
 tests/cases/conformance/statements/tryStatements/invalidTryStatements.ts(11,5): error TS1005: 'try' expected.
 tests/cases/conformance/statements/tryStatements/invalidTryStatements.ts(15,5): error TS1005: 'try' expected.
@@ -17,7 +17,7 @@ tests/cases/conformance/statements/tryStatements/invalidTryStatements.ts(19,20):
 
         try { }; // error missing finally
                ~
-!!! error TS1005: 'finally' expected.
+!!! error TS1472: 'catch' or 'finally' expected.
     }
 
     function fn2() {