From 68a91a7b440dd13bd4362a6960c0ce479997c823 Mon Sep 17 00:00:00 2001
From: Nilstrieb <48135649+Nilstrieb@users.noreply.github.com>
Date: Wed, 3 Nov 2021 21:17:32 +0100
Subject: [PATCH] start bird

---
 README.md       |  2 ++
 src/bird/mem.rs | 12 ++++++++++++
 src/bird/mod.rs |  8 ++++++++
 src/lib.rs      |  1 +
 std.md          | 18 ++++++++++++++++++
 5 files changed, 41 insertions(+)
 create mode 100644 src/bird/mem.rs
 create mode 100644 src/bird/mod.rs
 create mode 100644 std.md

diff --git a/README.md b/README.md
index c59a58f..ff9319f 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+There is currently a tree-walking interpreter called `bird` in progress, but the plan is to have a bytecode vm in the end
+
 language_name is a small embeddable scripting language
 
 language_name is inspired by Javascript, Lox, Lua, Python, Rust and more
diff --git a/src/bird/mem.rs b/src/bird/mem.rs
new file mode 100644
index 0000000..144c843
--- /dev/null
+++ b/src/bird/mem.rs
@@ -0,0 +1,12 @@
+use std::collections::HashMap;
+use std::rc::Rc;
+
+#[derive(Debug, PartialEq, Clone, Hash)]
+enum Value {
+    Null,
+    Bool(bool),
+    Number(f64),
+    String(String),
+    Object(HashMap<String, Value>),
+    Array(Vec<Value>),
+}
diff --git a/src/bird/mod.rs b/src/bird/mod.rs
new file mode 100644
index 0000000..8214411
--- /dev/null
+++ b/src/bird/mod.rs
@@ -0,0 +1,8 @@
+mod mem;
+
+use crate::ast::Program;
+
+#[derive(Debug)]
+struct Vm {}
+
+fn execute(program: Program) {}
diff --git a/src/lib.rs b/src/lib.rs
index d0fde03..c699edd 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,5 @@
 mod ast;
+mod bird;
 mod errors;
 mod lex;
 mod parse;
diff --git a/std.md b/std.md
new file mode 100644
index 0000000..04783b7
--- /dev/null
+++ b/std.md
@@ -0,0 +1,18 @@
+# Std functions
+
+`x`, `y`, .. : arguments  
+`x?` : optional  
+`x(): int` : return type
+
+Available on the global scope for now:
+
+# IO
+
+`print(x)`
+
+`println(x)`
+
+`input(x?): string`
+
+`time(): number`
+