From d9e96398a44211f65081f132a6fc2b7eb13a9c05 Mon Sep 17 00:00:00 2001
From: greg <greg.shuflin@protonmail.com>
Date: Mon, 26 Feb 2018 02:21:21 -0800
Subject: [PATCH] More operator stuff

---
 src/schala_lang/builtin.rs      | 8 +++++++-
 src/schala_lang/eval.rs         | 5 +++++
 src/schala_lang/typechecking.rs | 8 ++++++++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/schala_lang/builtin.rs b/src/schala_lang/builtin.rs
index e462d75..a7a539a 100644
--- a/src/schala_lang/builtin.rs
+++ b/src/schala_lang/builtin.rs
@@ -44,6 +44,10 @@ impl PrefixOp {
   pub fn is_prefix(op: &str) -> bool {
     PREFIX_OPS.get(op).is_some()
   }
+  pub fn get_type(&self) -> TypeResult<Type> {
+    let s = self.sigil.as_str();
+    PREFIX_OPS.get(s).map(|x| x.0.clone()).ok_or(format!("Prefix op {} not found", s))
+  }
 }
 lazy_static! {
   static ref PREFIX_OPS: HashMap<&'static str, (Type, ())> = 
@@ -51,7 +55,6 @@ lazy_static! {
       "+" => (Func(bx!(Const(Int)),  bx!(Const(Int))), ()),
       "-" => (Func(bx!(Const(Int)),  bx!(Const(Int))), ()),
       "!" => (Func(bx!(Const(Bool)),  bx!(Const(Bool))), ()),
-      "~" => (Func(bx!(Const(Int)),  bx!(Const(Int))), ()),
     };
 }
 
@@ -67,5 +70,8 @@ lazy_static! {
       "//" => (Func(bx!(Const(Int)), bx!(Func(bx!(Const(Int)), bx!(Const(Int))))), (), 20),
       "%" => (Func(bx!(Const(Int)), bx!(Func(bx!(Const(Int)), bx!(Const(Int))))), (), 20),
       "++" => (Func(bx!(Const(StringT)), bx!(Func(bx!(Const(StringT)), bx!(Const(StringT))))), (), 30),
+      "^" => (Func(bx!(Const(Int)), bx!(Func(bx!(Const(Int)), bx!(Const(Int))))), (), 20),
+      "&" => (Func(bx!(Const(Int)), bx!(Func(bx!(Const(Int)), bx!(Const(Int))))), (), 20),
+      "|" => (Func(bx!(Const(Int)), bx!(Func(bx!(Const(Int)), bx!(Const(Int))))), (), 20),
     };
 }
diff --git a/src/schala_lang/eval.rs b/src/schala_lang/eval.rs
index 4efe4ea..1f12e2f 100644
--- a/src/schala_lang/eval.rs
+++ b/src/schala_lang/eval.rs
@@ -190,6 +190,9 @@ impl<'a> State<'a> {
         UnsignedInt(l / r)
       },
       ("%", UnsignedInt(l), UnsignedInt(r)) => UnsignedInt(l % r),
+      ("^", UnsignedInt(l), UnsignedInt(r)) => UnsignedInt(l ^ r),
+      ("&", UnsignedInt(l), UnsignedInt(r)) => UnsignedInt(l & r),
+      ("|", UnsignedInt(l), UnsignedInt(r)) => UnsignedInt(l | r),
       _ => return Err(format!("Runtime error: not yet implemented")),
     })
   }
@@ -204,6 +207,8 @@ impl<'a> State<'a> {
       ("!", Bool(false)) => Bool(true),
       ("-", UnsignedInt(n)) => SignedInt(-1*(n as i64)),
       ("-", SignedInt(n)) => SignedInt(-1*(n as i64)),
+      ("+", SignedInt(n)) => SignedInt(n),
+      ("+", UnsignedInt(n)) => UnsignedInt(n),
       _ => return Err(format!("Runtime error: not yet implemented")),
     })
   }
diff --git a/src/schala_lang/typechecking.rs b/src/schala_lang/typechecking.rs
index 50e641e..60b227a 100644
--- a/src/schala_lang/typechecking.rs
+++ b/src/schala_lang/typechecking.rs
@@ -110,6 +110,14 @@ impl TypeContext {
           other => return Err(format!("{:?} is not a binary function type", other))
         }
       },
+      &PrefixExp(ref op, ref expr) => match op.get_type()? {
+        Func(box t1, box t2) => {
+          let expr_ty = self.infer(expr)?;
+          self.unify(t1, expr_ty)?;
+          Ok(t2)
+        },
+        other => return Err(format!("{:?} is not a prefix op function type", other))
+      },
       /*
   PrefixExp(Operation, Box<Expression>),
   TupleLiteral(Vec<Expression>),