From 173b249d9a91d8fee7c3cc18946e8fda188295c2 Mon Sep 17 00:00:00 2001
From: Akshay Nair <phenax5@gmail.com>
Date: Sat, 8 Jan 2022 17:33:10 +0530
Subject: refactor: creates constructors for expr adt

---
 src/types.ts | 36 +++++++++++++++++++++---------------
 1 file changed, 21 insertions(+), 15 deletions(-)

(limited to 'src/types.ts')

diff --git a/src/types.ts b/src/types.ts
index 21e9517..7863981 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,17 +1,23 @@
+import { constructors, Union } from "./utils"
 
-export type Expr =
-  | { tag: 'Start' }
-  | { tag: 'End' }
-  | { tag: 'Optional'; expr: Expr }
-  | { tag: 'OneOrMore'; expr: Expr }
-  | { tag: 'ZeroOrMore'; expr: Expr }
-  | { tag: 'NextItem' }
-  | { tag: 'AnyItem' }
-  | { tag: 'Or' }
-  | { tag: 'AnyString' }
-  | { tag: 'AnyNumber' }
-  | { tag: 'AnyBool' }
-  | { tag: 'Truthy' }
-  | { tag: 'Falsey' }
-  | { tag: 'Group'; exprs: Expr[] }
+type ExprT = {
+  Start: any,
+  End: any,
+  Optional: { expr: Expr },
+  OneOrMore: { expr: Expr },
+  ZeroOrMore: { expr: Expr },
+  NextItem: any,
+  AnyItem: any,
+  Or: any,
+  AnyString: any,
+  AnyNumber: any,
+  AnyBool: any,
+  Truthy: any,
+  Falsey: any,
+  Group: { exprs: Expr[] },
+}
+
+export type Expr = Union<ExprT>
+
+export const Expr = constructors<ExprT>()
 
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