From 25b31684378d3b0668b65939fc7b30b0c1e8d130 Mon Sep 17 00:00:00 2001
From: aarne <aarne@cs.chalmers.se>
Date: Tue, 20 Dec 2005 14:20:42 +0000
Subject: CS's system S

---
 examples/systemS/FormulaSymb.gf | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 examples/systemS/FormulaSymb.gf

(limited to 'examples/systemS/FormulaSymb.gf')

diff --git a/examples/systemS/FormulaSymb.gf b/examples/systemS/FormulaSymb.gf
new file mode 100644
index 000000000..5c2360673
--- /dev/null
+++ b/examples/systemS/FormulaSymb.gf
@@ -0,0 +1,22 @@
+--# -path=.:prelude
+
+concrete FormulaSymb of Formula = open Precedence in {
+
+  lincat
+    Formula, Term = PrecExp ;
+
+  lin
+    And = infixL 3 "&" ;
+    Or  = infixL 2 "v" ;
+    If  = infixR 1 "->" ;
+    Not = prefixR 4 "~" ;
+    Abs = constant "_|_" ;
+
+----    All P = mkPrec 4 PR (paren ("All" ++ P.$0) ++ usePrec P 4) ;
+----    Exist P = mkPrec 4 PR (paren ("Ex" ++ P.$0) ++ usePrec P 4) ;
+
+    A = constant "A" ;
+    B = constant "B" ;
+    C = constant "C" ;
+
+}
\ No newline at end of file
-- 
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