add mlua

__lang/mlua-test/src/main.rs

@@ -0,0 +1,48 @@
+use mlua::{Error, Lua, MultiValue};
+use rustyline::DefaultEditor;
+
+fn main() {
+    let lua = Lua::new();
+    let mut editor = DefaultEditor::new().expect("Failed to create editor");
+
+    loop {
+        let mut prompt = "> ";
+        let mut line = String::new();
+
+        loop {
+            match editor.readline(prompt) {
+                Ok(input) => line.push_str(&input),
+                Err(_) => return,
+            }
+
+            match lua.load(&line).eval::<MultiValue>() {
+                Ok(values) => {
+                    editor.add_history_entry(line).unwrap();
+                    if values.len() > 0 {
+                        println!(
+                            "{}",
+                            values
+                                .iter()
+                                .map(|value| format!("{:#?}", value))
+                                .collect::<Vec<_>>()
+                                .join("\t")
+                        );
+                    }
+                    break;
+                }
+                Err(Error::SyntaxError {
+                        incomplete_input: true,
+                        ..
+                    }) => {
+                    // continue reading input and append it to `line`
+                    line.push_str("\n"); // separate input lines
+                    prompt = ">> ";
+                }
+                Err(e) => {
+                    eprintln!("error: {}", e);
+                    break;
+                }
+            }
+        }
+    }
+}