From 2f0f6c782a881b19a183b368c11a0b74ef10566c Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijnh@gmail.com>
Date: Wed, 25 Jan 2012 13:19:32 +0100
Subject: [PATCH] Add bit-shifting ops to ast_util::eval_const_expr

Closes #1659
---
 src/comp/syntax/ast_util.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/comp/syntax/ast_util.rs b/src/comp/syntax/ast_util.rs
index 7a88359d26c..7d5e07d7950 100644
--- a/src/comp/syntax/ast_util.rs
+++ b/src/comp/syntax/ast_util.rs
@@ -265,6 +265,8 @@ fn eval_const_expr(e: @expr) -> const_val {
               mul { const_int(a * b) } div { const_int(a / b) }
               rem { const_int(a % b) } and | bitand { const_int(a & b) }
               or | bitor { const_int(a | b) } bitxor { const_int(a ^ b) }
+              lsl { const_int(a << b) } lsr { const_int(a >> b) }
+              asr { const_int(a >>> b) }
               eq { fromb(a == b) } lt { fromb(a < b) }
               le { fromb(a <= b) } ne { fromb(a != b) }
               ge { fromb(a >= b) } gt { fromb(a > b) }
@@ -276,6 +278,8 @@ fn eval_const_expr(e: @expr) -> const_val {
               mul { const_uint(a * b) } div { const_uint(a / b) }
               rem { const_uint(a % b) } and | bitand { const_uint(a & b) }
               or | bitor { const_uint(a | b) } bitxor { const_uint(a ^ b) }
+              lsl { const_int(a << b as i64) } lsr { const_int(a >> b as i64) }
+              asr { const_int(a >>> b as i64) }
               eq { fromb(a == b) } lt { fromb(a < b) }
               le { fromb(a <= b) } ne { fromb(a != b) }
               ge { fromb(a >= b) } gt { fromb(a > b) }