Initial commit

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

src/vm/syn/parser.lalrpop

@@ -0,0 +1,73 @@
+use std::str::FromStr;
+use crate::vm::{
+    syn::ast::*,
+};
+
+grammar;
+
+// TODO : instkind
+InstOp: InstOp = {
+    "add" => InstOp::Add,
+    "mul" => InstOp::Mul,
+    "div" => InstOp::Div,
+    "neg" => InstOp::Neg,
+    "and" => InstOp::And,
+    "or" => InstOp::Or,
+    "xor" => InstOp::Xor,
+    "shl" => InstOp::Shl,
+    "shr" => InstOp::Shr,
+    "cmpeq" => InstOp::CmpEq,
+    "cmplt" => InstOp::CmpLt,
+    "jz" => InstOp::Jz,
+    "jnz" => InstOp::Jnz,
+    "load" => InstOp::Load,
+    "store" => InstOp::Store,
+    "storeimm" => InstOp::StoreImm,
+    "copy" => InstOp::Copy,
+    "nop" => InstOp::Nop,
+    "halt" => InstOp::Halt,
+}
+
+LabelDef: String = {
+    <Label> ":" => <>
+}
+
+pub Label: String = {
+    "[a-zA-Z]+" => String::from(<>),
+}
+
+pub Section: Section = {
+    ".code" => Section::Code,
+    ".data" => Section::Data,
+}
+
+pub Inst: Inst = {
+    <op:InstOp> <head:Value> <tail:("," <Value>)+> => {
+        Inst {
+            op,
+            args: {
+                let mut tail = tail;
+                tail.insert(0, head);
+                tail
+            }
+        }
+    },
+
+    <op:InstOp> <head:Value?> => {
+        Inst { op, args: if let Some(head) = head { vec![head] } else { vec![] } }
+    }
+}
+
+pub Value: Value = {
+    <Number> => Value::Number(<>),
+    <Label> => Value::Label(<>),
+}
+
+pub Number: u64 = {
+    <s:r"[0-9]+"> => u64::from_str(s).unwrap()
+}
+
+pub Line: Line = {
+    <Section> => Line::Section(<>),
+    <Inst> => Line::Inst(<>),
+}