1 files changed, 13 insertions, 0 deletions
diff --git a/book/examples/chapter7/QueryEng.gf b/book/examples/chapter7/QueryEng.gf
new file mode 100644
index 000000000..cc14d5eb7
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+++ b/book/examples/chapter7/QueryEng.gf
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+concrete QueryEng of Query = {
+  lincat 
+    Answer, Question, Object = Str ;
+  lin 
+    Even  = pred "even" ;
+    Odd   = pred "odd" ;
+    Prime = pred "prime" ;
+    Number i = i.s ;
+    Yes = "yes" ;
+    No = "no" ;
+  oper
+    pred : Str -> Str -> Str = \f,x -> "is" ++ x ++ f ;
+}