WIP commit to re-add and refactor config, repl, and library code

Signed-off-by: Ava Hahn <ava@aidanis.online>

src/stl.rs

@@ -19,31 +19,36 @@ use crate::segment::{Ctr, Seg, Type};
 use crate::eval::eval;
 use crate::sym::{SymTable, Symbol, ValueType, Args, UserFn};
 use std::env;
+use std::rc::Rc;
 
-/*
-// the stdlib var export function with env_sync on
-static LIB_STORE_ENV: Symbol = Symbol {
-    name: String::from("export"),
-    args: Args::Lazy(2),
-    value: ValueType::Internal(Box::new( |ast: &Seg| -> Ctr {
-        _store_callback(ast, true)
-    },
-    )),
-    has_undefined_symbols: false,
-};
+fn store_stdlib(env: bool, syms: &mut SymTable) -> Result<(), String> {
+    syms.insert("def".to_string(), Symbol {
+        name: String::from("export"),
+        args: Args::Lazy(2),
+        conditional_branches: false,
+        value: ValueType::Internal(Rc::new( move |ast: &Seg, syms: &mut SymTable| -> Ctr {
+            _store_callback(ast, syms, env)
+        },
+        )),
+    });
 
-// the stdlib var export function with env_sync off
-pub static LIB_STORE_NO_ENV: Symbol = Symbol {
-    name: String::from("export"),
-    args: Args::Lazy(2),
-    value: ValueType::Internal(Box::new( |ast: &Seg| -> Ctr {
-        _store_callback(ast, false)
-    },
-    )),
-    has_undefined_symbols: false,
-};*/
+    syms.insert("append".to_string(), Symbol {
+        name: String::from("append"),
+        args: Args::Infinite,
+        conditional_branches: false,
+        value: ValueType::Internal(Rc::new(_append_callback)),
+    });
+
+    Ok(())
+}
+
+
+fn _append_callback (_ast: &Seg, _syms: &mut SymTable) -> Ctr {
+    // if car is a list, append cdr
+    // otherwise create a list out of all arguments
+    todo!()
+}
 
-// TODO : declare function if arg list is long enough
 fn _store_callback (ast: &Seg, syms: &mut SymTable, env_cfg: bool) -> Ctr {
     let is_var = ast.len() == 2;
     if let Ctr::Symbol(ref identifier) = *ast.car {