From 2afc9be712c69a66833de75683cdbaa3886379f1 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@gmail.com>
Date: Tue, 9 Mar 2010 00:14:42 -0500
Subject: Implement unit vectors.

---
 dimension/common.rules | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'dimension/common.rules')

diff --git a/dimension/common.rules b/dimension/common.rules
index 72480c0..c03eee8 100644
--- a/dimension/common.rules
+++ b/dimension/common.rules
@@ -397,6 +397,12 @@ ARITH_EXPR: FLOAT_LITERAL
           }
           | "(" ARITH_EXPR ")" { $$ = $2; }
           | IDENTIFIER
+          | "x" { $$ = dmnsn_new_ast_ivector(1, 0, 0, 0, 0); }
+          | "u" { $$ = dmnsn_new_ast_ivector(1, 0, 0, 0, 0); }
+          | "y" { $$ = dmnsn_new_ast_ivector(0, 1, 0, 0, 0); }
+          | "v" { $$ = dmnsn_new_ast_ivector(0, 1, 0, 0, 0); }
+          | "z" { $$ = dmnsn_new_ast_ivector(0, 0, 1, 0, 0); }
+          | "t" { $$ = dmnsn_new_ast_ivector(0, 0, 0, 1, 0); }
 ;
 
 /* Colors */
-- 
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