Fix unary minus.

Unary minus needs to bind more closely than ^, in order to
parse -2^2 correctly.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/parser.rs b/src/parser.rs
index 4a87fda..badf286 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -72,7 +72,7 @@ impl<'a> Parser<'a> {
     fn parse_fun(&mut self) -> bool {
         if self.symbol("-") {
             self.stack.push(Op::Op {
-                prec: 0,
+                prec: 3,
                 eval: Box::new(|n| eval::int(0).sub(n)),
             });
             return true;