From 15df9abf812e11cbebff5a92665d4d7ee3feb3d3 Mon Sep 17 00:00:00 2001
From: Danny Arnold <despair.blue@gmail.com>
Date: Sun, 23 Apr 2017 17:25:25 +0200
Subject: [PATCH] add TSTypeOperator (#1396)

---
 src/printer.js                                            | 5 +++++
 .../types/typeOperator/__snapshots__/jsfmt.spec.js.snap   | 8 ++++++++
 .../conformance/types/typeOperator/jsfmt.spec.js          | 1 +
 .../conformance/types/typeOperator/typeOperator.ts        | 1 +
 4 files changed, 15 insertions(+)
 create mode 100644 tests/typescript/conformance/types/typeOperator/__snapshots__/jsfmt.spec.js.snap
 create mode 100644 tests/typescript/conformance/types/typeOperator/jsfmt.spec.js
 create mode 100644 tests/typescript/conformance/types/typeOperator/typeOperator.ts

diff --git a/src/printer.js b/src/printer.js
index d440df1d..71e96ec6 100644
--- a/src/printer.js
+++ b/src/printer.js
@@ -1974,6 +1974,11 @@ function genericPrintNoParens(path, options, print, args) {
         ") => ",
         path.call(print, "typeAnnotation"),
       ])
+    case "TSTypeOperator":
+      return concat([
+        "keyof ",
+        path.call(print, "typeAnnotation")
+      ])
     // TODO
     case "ClassHeritage":
     // TODO
diff --git a/tests/typescript/conformance/types/typeOperator/__snapshots__/jsfmt.spec.js.snap b/tests/typescript/conformance/types/typeOperator/__snapshots__/jsfmt.spec.js.snap
new file mode 100644
index 00000000..c5004ade
--- /dev/null
+++ b/tests/typescript/conformance/types/typeOperator/__snapshots__/jsfmt.spec.js.snap
@@ -0,0 +1,8 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`typeOperator.ts 1`] = `
+let a: (keyof T)[] = ["a", "b"];
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+let a: (keyof T)[] = ["a", "b"];
+
+`;
diff --git a/tests/typescript/conformance/types/typeOperator/jsfmt.spec.js b/tests/typescript/conformance/types/typeOperator/jsfmt.spec.js
new file mode 100644
index 00000000..bc085c48
--- /dev/null
+++ b/tests/typescript/conformance/types/typeOperator/jsfmt.spec.js
@@ -0,0 +1 @@
+run_spec(__dirname, { parser: "typescript" });
diff --git a/tests/typescript/conformance/types/typeOperator/typeOperator.ts b/tests/typescript/conformance/types/typeOperator/typeOperator.ts
new file mode 100644
index 00000000..36813dc2
--- /dev/null
+++ b/tests/typescript/conformance/types/typeOperator/typeOperator.ts
@@ -0,0 +1 @@
+let a: (keyof T)[] = ["a", "b"];