llgo/c/lua

c/lua/_demo/funccall-number/funccall.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	_ "unsafe"
+
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/lua"
+)
+
+func main() {
+	L := lua.NewState()
+	defer L.Close()
+
+	L.OpenLibs()
+	if res := L.LoadString(c.Str("function doubleNumber(x) return x * 2 end")); res != lua.OK {
+		c.Printf(c.Str("error: %s\n"), L.ToString(-1))
+	}
+	if res := L.PCall(0, 0, 0); res != lua.OK {
+		c.Printf(c.Str("error: %s\n"), L.ToString(-1))
+	}
+
+	L.GetGlobal(c.Str("doubleNumber"))
+	L.PushNumber(10)
+
+	if res := L.PCall(1, 1, 0); res != lua.OK {
+		c.Printf(c.Str("error: %s\n"), L.ToString(-1))
+	}
+
+	if res := L.IsNumber(-1); res != 0 {
+		result := L.ToInteger(-1)
+		c.Printf(c.Str("result: %lld\n"), result)
+	} else {
+		c.Printf(c.Str("error: %s\n"), L.ToString(-1))
+	}
+}
+
+/* Expected output:
+result: 20
+*/