fix(parser): report export imports in namespaces (#25086)

## Summary

- report TS(1147) for exported TypeScript import-equals declarations that reference external modules inside namespaces
- inspect the wrapped `TSImportEqualsDeclaration` within `ExportNamedDeclaration`
- update TypeScript parser coverage snapshots for all affected conformance cases

crates/oxc_parser/src/ts/statement.rs

@@ -451,6 +451,16 @@ impl<'a, C: Config> ParserImpl<'a, C> {
             Statement::ExportNamedDeclaration(decl) if decl.source.is_some() => {
                 self.error(diagnostics::export_in_namespace(decl.span));
             }
+            // `export import x = require("...")` is wrapped in an export declaration.
+            Statement::ExportNamedDeclaration(decl)
+                if matches!(
+                    &decl.declaration,
+                    Some(Declaration::TSImportEqualsDeclaration(import_decl))
+                        if import_decl.module_reference.is_external()
+                ) =>
+            {
+                self.error(diagnostics::import_in_namespace(decl.span));
+            }
             Statement::ExportAllDeclaration(decl) => {
                 self.error(diagnostics::export_in_namespace(decl.span));
             }

tasks/coverage/snapshots/parser_typescript.snap

@@ -6772,6 +6772,14 @@ Expect Syntax Error: tasks/coverage/typescript/tests/cases/conformance/types/wit
  32 │     export import M5 = require("M5");
     ╰────
 
+  × TS(1147): Import declarations in a namespace cannot reference a module.
+    ╭─[typescript/tests/cases/compiler/es5ModuleInternalNamedImports.ts:32:5]
+ 31 │     import M4 from "M4";
+ 32 │     export import M5 = require("M5");
+    ·     ─────────────────────────────────
+ 33 │ }
+    ╰────
+
   × TS(1015): A parameter cannot have a question mark and an initializer.
     ╭─[typescript/tests/cases/compiler/es6ClassTest.ts:25:44]
  24 │     constructor();
@@ -10947,6 +10955,22 @@ Expect Syntax Error: tasks/coverage/typescript/tests/cases/conformance/types/wit
  70 │     export var m1_im4_private_v1_public = m1_im4_private.c1;
     ╰────
 
+  × TS(1147): Import declarations in a namespace cannot reference a module.
+    ╭─[typescript/tests/cases/compiler/privacyGloImportParseErrors.ts:81:5]
+ 80 │     export import m1_im2_public = m1_M2_private;
+ 81 │     export import m1_im3_public = require("m1_M3_public");
+    ·     ──────────────────────────────────────────────────────
+ 82 │     export import m1_im4_public = require("m1_M4_private");
+    ╰────
+
+  × TS(1147): Import declarations in a namespace cannot reference a module.
+    ╭─[typescript/tests/cases/compiler/privacyGloImportParseErrors.ts:82:5]
+ 81 │     export import m1_im3_public = require("m1_M3_public");
+ 82 │     export import m1_im4_public = require("m1_M4_private");
+    ·     ───────────────────────────────────────────────────────
+ 83 │ }
+    ╰────
+
   × TS(1147): Import declarations in a namespace cannot reference a module.
      ╭─[typescript/tests/cases/compiler/privacyGloImportParseErrors.ts:121:9]
  120 │     namespace m2 {
@@ -11003,6 +11027,22 @@ Expect Syntax Error: tasks/coverage/typescript/tests/cases/conformance/types/wit
  70 │     export var m1_im4_private_v1_public = m1_im4_private.c1;
     ╰────
 
+  × TS(1147): Import declarations in a namespace cannot reference a module.
+    ╭─[typescript/tests/cases/compiler/privacyImportParseErrors.ts:81:5]
+ 80 │     export import m1_im2_public = m1_M2_private;
+ 81 │     export import m1_im3_public = require("m1_M3_public");
+    ·     ──────────────────────────────────────────────────────
+ 82 │     export import m1_im4_public = require("m1_M4_private");
+    ╰────
+
+  × TS(1147): Import declarations in a namespace cannot reference a module.
+    ╭─[typescript/tests/cases/compiler/privacyImportParseErrors.ts:82:5]
+ 81 │     export import m1_im3_public = require("m1_M3_public");
+ 82 │     export import m1_im4_public = require("m1_M4_private");
+    ·     ───────────────────────────────────────────────────────
+ 83 │ }
+    ╰────
+
   × TS(1147): Import declarations in a namespace cannot reference a module.
      ╭─[typescript/tests/cases/compiler/privacyImportParseErrors.ts:143:5]
  142 │ 
@@ -11019,6 +11059,22 @@ Expect Syntax Error: tasks/coverage/typescript/tests/cases/conformance/types/wit
  154 │     export var m1_im4_private_v1_public = m1_im4_private.c1;
      ╰────
 
+  × TS(1147): Import declarations in a namespace cannot reference a module.
+     ╭─[typescript/tests/cases/compiler/privacyImportParseErrors.ts:166:5]
+ 165 │     export import m1_im2_public = m2_M2_private;
+ 166 │     export import m1_im3_public = require("m2_M3_public");
+     ·     ──────────────────────────────────────────────────────
+ 167 │     export import m1_im4_public = require("m2_M4_private");
+     ╰────
+
+  × TS(1147): Import declarations in a namespace cannot reference a module.
+     ╭─[typescript/tests/cases/compiler/privacyImportParseErrors.ts:167:5]
+ 166 │     export import m1_im3_public = require("m2_M3_public");
+ 167 │     export import m1_im4_public = require("m2_M4_private");
+     ·     ───────────────────────────────────────────────────────
+ 168 │ }
+     ╰────
+
   × TS(1147): Import declarations in a namespace cannot reference a module.
      ╭─[typescript/tests/cases/compiler/privacyImportParseErrors.ts:273:9]
  272 │     namespace m2 {