1 files changed, 9 insertions, 0 deletions
diff --git a/compiler.d b/compiler.d
index ee9fcef..1920ae0 100644
--- a/compiler.d
+++ b/compiler.d
@@ -458,6 +458,13 @@ class Compiler {
         }
     }
 
+    ValueType compileNot(Form[] args) {
+        ValueType vt = resolve(args[0], ValueType.BOOLEAN);
+        func.chunk.writeOp(OpCode.OP_TYPE_CHECK_BOOLEAN, currentLine);
+        func.chunk.writeOp(OpCode.OP_NOT, currentLine);
+        return vt;
+    }
+
     void compileBlock(Form form) {
         Block block = cast(Block)form;
         beginScope();
@@ -571,6 +578,8 @@ class Compiler {
                 ValueType vt = compileLess(cons.tail, ValueType.NUMBER);
                 func.chunk.writeOp(OpCode.OP_NOT, cons.line);
                 return vt;
+            case "not":
+                return compileNot(cons.tail);
             default:
                 /*
                 writefln("unsure how to compile %s", sym.name);