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authorVincent Ambo <mail@tazj.in>2021-02-28T13·28+0200
committertazjin <mail@tazj.in>2021-02-28T14·36+0000
commit2d9456d2474116d9a42213f692b13821eb28de81 (patch)
tree38dfd4cda140ad63f0f00185d4f80605905f49ad /users/tazjin/rlox/src/bytecode/compiler.rs
parent47ffa8071152bcafb4b6ff87a3142bf12dbce12b (diff)
feat(tazjin/rlox): Implement unary negation operator r/2253
Change-Id: I9a5bd3581d4ed05371651697ec496341eb7971ae
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2572
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
Diffstat (limited to 'users/tazjin/rlox/src/bytecode/compiler.rs')
-rw-r--r--users/tazjin/rlox/src/bytecode/compiler.rs5
1 files changed, 5 insertions, 0 deletions
diff --git a/users/tazjin/rlox/src/bytecode/compiler.rs b/users/tazjin/rlox/src/bytecode/compiler.rs
index 95b111dba824..1ab42c705ab4 100644
--- a/users/tazjin/rlox/src/bytecode/compiler.rs
+++ b/users/tazjin/rlox/src/bytecode/compiler.rs
@@ -116,6 +116,10 @@ fn rule_for<T: Iterator<Item = Token>>(token: &TokenKind) -> ParseRule<T> {
             ParseRule::new(Some(Compiler::literal), None, Precedence::None)
         }
 
+        TokenKind::Bang => {
+            ParseRule::new(Some(Compiler::unary), None, Precedence::None)
+        }
+
         _ => ParseRule::new(None, None, Precedence::None),
     }
 }
@@ -168,6 +172,7 @@ impl<T: Iterator<Item = Token>> Compiler<T> {
 
         // Emit operator instruction
         match kind {
+            TokenKind::Bang => self.emit_op(OpCode::OpNot),
             TokenKind::Minus => self.emit_op(OpCode::OpNegate),
             _ => unreachable!("only called for unary operator tokens"),
         }