Initial commit

Includes: runtime base from a previous project, syn(tax) module with
parser and lexer

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

runtime/src/vm/inst.rs

@@ -0,0 +1,41 @@
+use crate::obj::prelude::*;
+
+#[derive(Debug, PartialEq)]
+pub enum Inst {
+    /// Push a literal symbol object to the stack.
+    PushSym(Sym),
+
+    /// Pop a value from the stack, possibly into a local symbol.
+    Pop(Option<Sym>),
+
+    /// Pops a symbol value and an object reference.
+    ///
+    /// This will get an attr from the object reference pointed to by the symbol.
+    ///
+    /// If the object reference is `:__local__`, this instruction will push a local value.
+    GetAttr,
+
+    /// Pops an object reference, a symbol value, and another object reference.
+    ///
+    /// This will set an attr of the second object ref to the first object ref, with the symbol
+    /// value name.
+    ///
+    /// If the given value is `:__local__`, this instruction will set a local value.
+    SetAttr,
+
+    /// Jump to a given address in the current function unconditionally.
+    Jump(usize),
+
+    /// Jump to a given address in the current function if the condition flag is true.
+    ///
+    /// The condition flag may be set by an internal function.
+    JumpTrue(usize),
+
+    /// Pops the top item off of the stack, followed by the number of arguments supplied, and
+    /// attempts to run the `__call__` attribute of the object.
+    Call(usize),
+
+    /// Pops the top value from the stack, and returns from the function, using the popped value as
+    /// a return value.
+    Return,
+}