From 14710493ec5659467656e8e5bd3644510f40fa0a Mon Sep 17 00:00:00 2001
From: Xie Yuheng <xyheme@gmail.com>
Date: Fri, 18 Aug 2023 05:56:20 +0800
Subject: [PATCH] move `formatEdge` to `edge/`

---
 TODO.md                     |  2 ++
 src/lang/edge/formatEdge.ts | 13 +++++++++++++
 src/lang/net/formatNet.ts   | 14 +-------------
 3 files changed, 16 insertions(+), 13 deletions(-)
 create mode 100644 src/lang/edge/formatEdge.ts

diff --git a/TODO.md b/TODO.md
index 08cd91a0..17e0da42 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,3 +1,5 @@
+remove `begin end` syntax
+
 # books
 
 反应网编程
diff --git a/src/lang/edge/formatEdge.ts b/src/lang/edge/formatEdge.ts
new file mode 100644
index 00000000..455da53f
--- /dev/null
+++ b/src/lang/edge/formatEdge.ts
@@ -0,0 +1,13 @@
+import { Edge } from "../edge"
+import { formatNode } from "../node/formatNode"
+
+export function formatEdge(edge: Edge): string {
+  const first = formatNode(edge.first.node)
+  const second = formatNode(edge.second.node)
+
+  if (edge.first.isPrincipal && edge.second.isPrincipal) {
+    return `(${first})-${edge.first.name}!${edge.second.name}-(${second})`
+  } else {
+    return `(${first})-${edge.first.name} ${edge.second.name}-(${second})`
+  }
+}
diff --git a/src/lang/net/formatNet.ts b/src/lang/net/formatNet.ts
index db6805c3..a931c0a5 100644
--- a/src/lang/net/formatNet.ts
+++ b/src/lang/net/formatNet.ts
@@ -1,19 +1,7 @@
-import { Edge } from "../edge"
-import { formatNode } from "../node/formatNode"
+import { formatEdge } from "../edge/formatEdge"
 import { Net } from "./Net"
 import { allEdges } from "./allEdges"
 
 export function formatNet(net: Net): string {
   return allEdges(net).map(formatEdge).join("\n")
 }
-
-function formatEdge(edge: Edge): string {
-  const first = formatNode(edge.first.node)
-  const second = formatNode(edge.second.node)
-
-  if (edge.first.isPrincipal && edge.second.isPrincipal) {
-    return `(${first})-${edge.first.name}!${edge.second.name}-(${second})`
-  } else {
-    return `(${first})-${edge.first.name} ${edge.second.name}-(${second})`
-  }
-}