From acc990ac7fd5ad510520d7a1eed449bfa92ba06e Mon Sep 17 00:00:00 2001
From: shylinux <shylinux@163.com>
Date: Fri, 31 Mar 2023 13:01:37 +0800
Subject: [PATCH] opt yac

---
 src/back.shy |  2 ++
 src/demo.shy | 35 +++++++++++++++--------------------
 2 files changed, 17 insertions(+), 20 deletions(-)
 create mode 100644 src/back.shy

diff --git a/src/back.shy b/src/back.shy
new file mode 100644
index 00000000..afed32ab
--- /dev/null
+++ b/src/back.shy
@@ -0,0 +1,2 @@
+# demo script
+
diff --git a/src/demo.shy b/src/demo.shy
index eaeeaa50..3350be29 100644
--- a/src/demo.shy
+++ b/src/demo.shy
@@ -1,25 +1,20 @@
 # demo script
 
-let a = system(ls bin)
-let a = system(ls, etc)
-return
+cmd space
+
+let a = 1;
+
+let a, b = 1, 2
+
+if a > 1 { pwd }
+
+if a, b = 2, 4; a > 1 { pwd }
 
-let a = 1
-if a > 0 { pwd }
-if a = 2; a > 0 { pwd }
 for a = 2; a < 5; a++ { pwd }
-for a = 2; a < 5 {
-	pwd
-	let a = a + 1
-}
-let a = 2
-for a < 5 {
-	pwd
-	let a = a + 1
-}
-let a = 2
-for ;a < 5; {
-	pwd
-	let a = a + 1
-}
 
+func show(a, b) (c, d) {
+	let c = system(ls, a)
+	return
+	pwd
+}
+let e, f = show(etc, bin)