From 205a2e83ace4af595ae7deb071119c95fbb6dfa3 Mon Sep 17 00:00:00 2001
From: Manuel Serret <mserret99@gmail.com>
Date: Tue, 31 Dec 2024 10:15:30 +0100
Subject: [PATCH] feat: support indexed access type

---
 src/handlers.js                                   |  6 ++++++
 test/samples/ts-index-access-type/expected.ts     |  4 ++++
 test/samples/ts-index-access-type/expected.ts.map | 11 +++++++++++
 test/samples/ts-index-access-type/input.ts        |  4 ++++
 4 files changed, 25 insertions(+)
 create mode 100644 test/samples/ts-index-access-type/expected.ts
 create mode 100644 test/samples/ts-index-access-type/expected.ts.map
 create mode 100644 test/samples/ts-index-access-type/input.ts

diff --git a/src/handlers.js b/src/handlers.js
index 66305bf..648db6f 100644
--- a/src/handlers.js
+++ b/src/handlers.js
@@ -556,6 +556,12 @@ function handle_type_annotation(node, state) {
 			state.commands.push(' : ');
 			handle_type_annotation(node.falseType, state);
 			break;
+		case 'TSIndexedAccessType':
+			handle_type_annotation(node.objectType, state);
+			state.commands.push('[');
+			handle_type_annotation(node.indexType, state);
+			state.commands.push(']');
+			break;
 		default:
 			throw new Error(`Not implemented type annotation ${node.type}`);
 	}
diff --git a/test/samples/ts-index-access-type/expected.ts b/test/samples/ts-index-access-type/expected.ts
new file mode 100644
index 0000000..b7e5b35
--- /dev/null
+++ b/test/samples/ts-index-access-type/expected.ts
@@ -0,0 +1,4 @@
+type A = { a: string; b: number };
+type B = A['b'];
+
+const c: A['b'] = 1;
\ No newline at end of file
diff --git a/test/samples/ts-index-access-type/expected.ts.map b/test/samples/ts-index-access-type/expected.ts.map
new file mode 100644
index 0000000..d04c1e6
--- /dev/null
+++ b/test/samples/ts-index-access-type/expected.ts.map
@@ -0,0 +1,11 @@
+{
+  "version": 3,
+  "names": [],
+  "sources": [
+    "input.js"
+  ],
+  "sourcesContent": [
+    "type A = { a: string; b: number };\ntype B = A['b'];\n\nconst c: A['b'] = 1;\n"
+  ],
+  "mappings": "KAAK,CAAC,KAAK,CAAC,UAAU,CAAC;KAClB,CAAC,GAAG,CAAC,CAAC,GAAG;;MAER,CAAS,EAAN,CAAC,CAAC,GAAG,IAAI,CAAC"
+}
\ No newline at end of file
diff --git a/test/samples/ts-index-access-type/input.ts b/test/samples/ts-index-access-type/input.ts
new file mode 100644
index 0000000..2cdf80c
--- /dev/null
+++ b/test/samples/ts-index-access-type/input.ts
@@ -0,0 +1,4 @@
+type A = { a: string; b: number };
+type B = A['b'];
+
+const c: A['b'] = 1;