feat: improve error location

packages/ast-spec/src/declaration/TSEnumDeclaration/fixtures/_error_/decorator/snapshots/1-TSESTree-Error.shot

@@ -3,6 +3,6 @@
 exports[`AST Fixtures declaration TSEnumDeclaration _error_ decorator TSESTree - Error 1`] = `
 "TSError
 > 1 | @decl enum Test {}
-    | ^^^^^^^^^^^^^^^^^^ Decorators are not valid here.
+    | ^^^^^ Decorators are not valid here.
   2 |"
 `;

packages/ast-spec/src/declaration/TSInterfaceDeclaration/fixtures/_error_/decorator/snapshots/1-TSESTree-Error.shot

@@ -3,6 +3,6 @@
 exports[`AST Fixtures declaration TSInterfaceDeclaration _error_ decorator TSESTree - Error 1`] = `
 "TSError
 > 1 | @decl interface Test {}
-    | ^^^^^^^^^^^^^^^^^^^^^^^ Decorators are not valid here.
+    | ^^^^^ Decorators are not valid here.
   2 |"
 `;

packages/ast-spec/src/declaration/TSTypeAliasDeclaration/fixtures/_error_/decorator/snapshots/1-TSESTree-Error.shot

@@ -3,6 +3,6 @@
 exports[`AST Fixtures declaration TSTypeAliasDeclaration _error_ decorator TSESTree - Error 1`] = `
 "TSError
 > 1 | @decl type Test = {};
-    | ^^^^^^^^^^^^^^^^^^^^^ Decorators are not valid here.
+    | ^^^^^ Decorators are not valid here.
   2 |"
 `;

packages/ast-spec/src/declaration/VariableDeclaration/fixtures/_error_/decorator/snapshots/1-TSESTree-Error.shot

@@ -3,6 +3,6 @@
 exports[`AST Fixtures declaration VariableDeclaration _error_ decorator TSESTree - Error 1`] = `
 "TSError
 > 1 | @decl type Test = {};
-    | ^^^^^^^^^^^^^^^^^^^^^ Decorators are not valid here.
+    | ^^^^^ Decorators are not valid here.
   2 |"
 `;

packages/ast-spec/src/legacy-fixtures/errorRecovery/fixtures/_error_/decorator-on-enum-declaration/snapshots/1-TSESTree-Error.shot

@@ -5,5 +5,5 @@ exports[`AST Fixtures legacy-fixtures errorRecovery _error_ decorator-on-enum-de
   1 | // TODO: This fixture might be too large, and if so should be split up.
   2 |
 > 3 | @dec enum E {}
-    | ^^^^^^^^^^^^^^ Decorators are not valid here."
+    | ^^^^ Decorators are not valid here."
 `;

packages/ast-spec/src/legacy-fixtures/errorRecovery/fixtures/_error_/decorator-on-interface-declaration/snapshots/1-TSESTree-Error.shot

@@ -5,7 +5,6 @@ exports[`AST Fixtures legacy-fixtures errorRecovery _error_ decorator-on-interfa
   1 | // TODO: This fixture might be too large, and if so should be split up.
   2 |
 > 3 | @deco()
-    | ^^^^^^^
-> 4 | interface M {}
-    | ^^^^^^^^^^^^^^^ Decorators are not valid here."
+    | ^^^^^^^ Decorators are not valid here.
+  4 | interface M {}"
 `;

packages/ast-spec/src/legacy-fixtures/errorRecovery/fixtures/_error_/decorator-on-variable/snapshots/1-TSESTree-Error.shot

@@ -5,8 +5,7 @@ exports[`AST Fixtures legacy-fixtures errorRecovery _error_ decorator-on-variabl
   1 | // TODO: This fixture might be too large, and if so should be split up.
   2 |
 > 3 | @deco()
-    | ^^^^^^^
-> 4 | const a = 1
-    | ^^^^^^^^^^^^ Decorators are not valid here.
+    | ^^^^^^^ Decorators are not valid here.
+  4 | const a = 1
   5 |"
 `;

packages/typescript-estree/src/convert.ts

@@ -3033,8 +3033,8 @@ export class Converter {
   #checkIllegalDecorators(node: ts.Node): void {
     if (nodeHasIllegalDecorators(node)) {
       this.#throwUnlessAllowInvalidAST(
-        // eslint-disable-next-line deprecation/deprecation
-        node.decorators?.[0] ?? node,
+        // @ts-expect-error -- this is safe as it's guarded
+        node.illegalDecorators?.[0] ?? node,
         'Decorators are not valid here.',
       );
     }