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Diffstat (limited to 'book/examples/chapter9/LogicSymb.gf')
| -rw-r--r-- | book/examples/chapter9/LogicSymb.gf | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/book/examples/chapter9/LogicSymb.gf b/book/examples/chapter9/LogicSymb.gf new file mode 100644 index 000000000..14932fe9b --- /dev/null +++ b/book/examples/chapter9/LogicSymb.gf @@ -0,0 +1,13 @@ +concrete LogicSymb of Logic = open Formal, Prelude in { + +lincat + Prop, Ind = TermPrec ; +lin + And = infixl 2 "\\&" ; + Or = infixl 2 "\\vee" ; + If = infixr 1 "\\sup" ; + Not = prefix 3 "\\sim" ; + All P = prefix 3 (parenth ("\\forall" ++ P.$0)) P ; + Exist P = prefix 3 (parenth ("\\exists" ++ P.$0)) P ; + Past = prefix 3 "P" ; +} |