From 4c2f8d9337c2c45da345e536c1f44157d64a14bd Mon Sep 17 00:00:00 2001
From: Henry Zhu <hi@henryzoo.com>
Date: Thu, 10 Jan 2019 13:57:00 -0500
Subject: [PATCH] @babel/generator: Add emit and builder for TSImportType
 (#9309)

---
 .../babel-generator/src/generators/typescript.js  | 15 +++++++++++++++
 .../typescript/types-import-type/input.js         |  3 +++
 .../typescript/types-import-type/output.js        |  3 +++
 .../babel-types/src/definitions/typescript.js     | 12 +++++++++++-
 4 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 packages/babel-generator/test/fixtures/typescript/types-import-type/input.js
 create mode 100644 packages/babel-generator/test/fixtures/typescript/types-import-type/output.js

diff --git a/packages/babel-generator/src/generators/typescript.js b/packages/babel-generator/src/generators/typescript.js
index 33489ebbb2..83c279c1f1 100644
--- a/packages/babel-generator/src/generators/typescript.js
+++ b/packages/babel-generator/src/generators/typescript.js
@@ -476,6 +476,21 @@ export function TSModuleBlock(node) {
   this.tsPrintBraced(node.body, node);
 }
 
+export function TSImportType(node) {
+  const { argument, qualifier, typeParameters } = node;
+  this.word("import");
+  this.token("(");
+  this.print(argument, node);
+  this.token(")");
+  if (qualifier) {
+    this.token(".");
+    this.print(qualifier, node);
+  }
+  if (typeParameters) {
+    this.print(typeParameters, node);
+  }
+}
+
 export function TSImportEqualsDeclaration(node) {
   const { isExport, id, moduleReference } = node;
   if (isExport) {
diff --git a/packages/babel-generator/test/fixtures/typescript/types-import-type/input.js b/packages/babel-generator/test/fixtures/typescript/types-import-type/input.js
new file mode 100644
index 0000000000..848a461d3c
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/typescript/types-import-type/input.js
@@ -0,0 +1,3 @@
+let x: typeof import('./x');
+let Y: import('./y').Y;
+let z: import("/z").foo.bar<string>;
\ No newline at end of file
diff --git a/packages/babel-generator/test/fixtures/typescript/types-import-type/output.js b/packages/babel-generator/test/fixtures/typescript/types-import-type/output.js
new file mode 100644
index 0000000000..848a461d3c
--- /dev/null
+++ b/packages/babel-generator/test/fixtures/typescript/types-import-type/output.js
@@ -0,0 +1,3 @@
+let x: typeof import('./x');
+let Y: import('./y').Y;
+let z: import("/z").foo.bar<string>;
\ No newline at end of file
diff --git a/packages/babel-types/src/definitions/typescript.js b/packages/babel-types/src/definitions/typescript.js
index 2971853575..4f321adb3b 100644
--- a/packages/babel-types/src/definitions/typescript.js
+++ b/packages/babel-types/src/definitions/typescript.js
@@ -185,7 +185,7 @@ defineType("TSTypeQuery", {
   aliases: ["TSType"],
   visitor: ["exprName"],
   fields: {
-    exprName: validateType("TSEntityName"),
+    exprName: validateType(["TSEntityName", "TSImportType"]),
   },
 });
 
@@ -405,6 +405,16 @@ defineType("TSModuleBlock", {
   },
 });
 
+defineType("TSImportType", {
+  aliases: ["TSType"],
+  visitor: ["argument", "qualifier", "typeParameters"],
+  fields: {
+    argument: validateType("StringLiteral"),
+    qualifier: validateOptionalType("TSEntityName"),
+    typeParameters: validateOptionalType("TSTypeParameterInstantiation"),
+  },
+});
+
 defineType("TSImportEqualsDeclaration", {
   aliases: ["Statement"],
   visitor: ["id", "moduleReference"],