up n_m

node_modules/@mdx-js/mdx/lib/util/estree-util-declaration-to-expression.js

@@ -0,0 +1,31 @@
+/**
+ * @typedef {import('estree-jsx').Declaration} Declaration
+ * @typedef {import('estree-jsx').Expression} Expression
+ * @typedef {import('estree-jsx').MaybeNamedClassDeclaration} MaybeNamedClassDeclaration
+ * @typedef {import('estree-jsx').MaybeNamedFunctionDeclaration} MaybeNamedFunctionDeclaration
+ */
+
+import {ok as assert} from 'devlop'
+
+/**
+ * Turn a declaration into an expression.
+ *
+ * Doesn’t work for variable declarations, but that’s fine for our use case
+ * because currently we’re using this utility for export default declarations,
+ * which can’t contain variable declarations.
+ *
+ * @param {Readonly<Declaration | MaybeNamedClassDeclaration | MaybeNamedFunctionDeclaration>} declaration
+ *   Declaration.
+ * @returns {Expression}
+ *   Expression.
+ */
+export function declarationToExpression(declaration) {
+  if (declaration.type === 'FunctionDeclaration') {
+    return {...declaration, type: 'FunctionExpression'}
+  }
+
+  // This is currently an internal utility so the next shouldn’t happen or a
+  // maintainer is making a mistake.
+  assert(declaration.type === 'ClassDeclaration', 'unexpected node type')
+  return {...declaration, type: 'ClassExpression'}
+}