fix(parser): [Babel8] Align error codes between Flow and TypeScript (#13294)

* Align error codes between Flow and TypeScript

* Implement compat fallback in makeErrorTemplates

* Add tests

packages/babel-parser/src/plugins/flow/index.js

@@ -99,7 +99,7 @@ const FlowErrors = makeErrorTemplates(
       "`declare module` cannot be used inside another `declare module`.",
     NestedFlowComment:
       "Cannot have a flow comment inside another flow comment.",
-    OptionalBindingPattern:
+    PatternIsOptional:
       "A binding pattern parameter cannot be optional in an implementation signature.",
     SetterMayNotHaveThisParam: "A setter cannot have a `this` parameter.",
     SpreadVariance: "Spread properties cannot have variance.",
@@ -137,6 +137,7 @@ const FlowErrors = makeErrorTemplates(
     UnterminatedFlowComment: "Unterminated flow-comment.",
   },
   /* code */ ErrorCodes.SyntaxError,
+  /* syntaxPlugin */ "flow",
 );
 /* eslint-disable sort-keys */
 
@@ -2532,7 +2533,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
     parseAssignableListItemTypes(param: N.Pattern): N.Pattern {
       if (this.eat(tt.question)) {
         if (param.type !== "Identifier") {
-          this.raise(param.start, FlowErrors.OptionalBindingPattern);
+          this.raise(param.start, FlowErrors.PatternIsOptional);
         }
         if (this.isThisParam(param)) {
           this.raise(param.start, FlowErrors.ThisParamMayNotBeOptional);

packages/babel-parser/src/plugins/jsx/index.js

@@ -40,6 +40,7 @@ const JsxErrors = makeErrorTemplates(
       "Adjacent JSX elements must be wrapped in an enclosing tag. Did you want a JSX fragment <>...</>?",
   },
   /* code */ ErrorCodes.SyntaxError,
+  /* syntaxPlugin */ "jsx",
 );
 /* eslint-disable sort-keys */
 

packages/babel-parser/src/plugins/typescript/index.js

@@ -156,6 +156,7 @@ const TSErrors = makeErrorTemplates(
       "Name in a signature must be an Identifier, ObjectPattern or ArrayPattern, instead got %0.",
   },
   /* code */ ErrorCodes.SyntaxError,
+  /* syntaxPlugin */ "typescript",
 );
 /* eslint-disable sort-keys */