rust: factor out values returned by the VM into new package

Cargo.toml

@@ -4,7 +4,8 @@ resolver = "2"
 
 members = [
     "langlang",
-    "langlang_syntax",
     "langlang_lib",
+    "langlang_syntax",
+    "langlang_value",
     "tests",
 ]

langlang/Cargo.toml

@@ -14,4 +14,5 @@ readme = "../README.org"
 log = "0.4"
 env_logger = "0.8"
 langlang_lib = { path = "../langlang_lib", version = "0.1.0" }
+langlang_value = { path = "../langlang_value", version = "0.1.0" }
 clap = { version = "4.0", features = ["derive"] }

langlang/src/main.rs

@@ -4,7 +4,10 @@ use std::io::Write;
 use std::path::{Path, PathBuf};
 use std::{fs, io};
 
-use langlang_lib::{compiler, format, import, vm};
+use langlang_lib::vm::VM;
+use langlang_lib::{compiler, import};
+use langlang_value::format;
+use langlang_value::value::Value;
 
 /// Enumeration of all sub commands supported by this binary
 #[derive(Subcommand)]
@@ -40,7 +43,7 @@ struct Cli {
     command: Command,
 }
 
-type FormattingFunc = fn(v: &vm::Value) -> String;
+type FormattingFunc = fn(v: &Value) -> String;
 
 fn formatter(name: &str) -> FormattingFunc {
     match name {
@@ -69,7 +72,7 @@ fn command_run(
     match input_file {
         Some(input_file) => {
             let input_data = fs::read_to_string(input_file)?;
-            let mut m = vm::VM::new(&program);
+            let mut m = VM::new(&program);
             match m.run_str(&input_data)? {
                 None => println!("not much"),
                 Some(v) => println!("{}", fmt(&v)),
@@ -101,7 +104,7 @@ fn command_run(
                 line.pop();
 
                 // run the line
-                let mut m = vm::VM::new(&program);
+                let mut m = VM::new(&program);
                 match m.run_str(&line)? {
                     None => println!("not much"),
                     Some(v) => println!("{}", fmt(&v)),

langlang_lib/Cargo.toml

@@ -14,3 +14,4 @@ readme = "../README.org"
 log = "0.4"
 env_logger = "0.8"
 langlang_syntax = { path = "../langlang_syntax" }
+langlang_value = { path = "../langlang_value" }

langlang_lib/src/lib.rs

@@ -1,5 +1,4 @@
 pub mod compiler;
-pub mod format;
 pub mod import;
 pub mod vm;