# HG changeset patch
# User Adam Chlipala <adamc@hcoop.net>
# Date 1236875105 14400
# Node ID 039ad51cf9c3d5438e7a89bc9df857fb229552b7
# Parent  d5552715db531b5c7755e0e16ef934f6dbfa9987
Add guard elim rule

diff -r d5552715db53 -r 039ad51cf9c3 doc/manual.tex
--- a/doc/manual.tex	Thu Mar 12 12:23:23 2009 -0400
+++ b/doc/manual.tex	Thu Mar 12 12:25:05 2009 -0400
@@ -665,6 +665,10 @@
   \Gamma \vdash c_1 :: \{\kappa\}
   & \Gamma \vdash c_2 :: \{\kappa'\}
   & \Gamma, c_1 \sim c_2 \vdash e : \tau
+}
+\quad \infer{\Gamma \vdash e \; ! : \tau}{
+  \Gamma \vdash e : [c_1 \sim c_2] \Rightarrow \tau
+  & \Gamma \vdash c_1 \sim c_2
 }$$
 
 \subsection{Pattern Typing}