Use a macro to impl fmt::Display

Author: Vincent Prouillet

src/query_format.rs

@@ -330,88 +330,33 @@ impl Displayable for Directive {
     }
 }
 
-impl fmt::Display for Document {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for Definition {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for OperationDefinition {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for FragmentDefinition {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for SelectionSet {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for Selection {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for Field {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for Query {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for Mutation {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for Subscription {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for VariableDefinition {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for VariableType {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for Value {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for InlineFragment {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for TypeCondition {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for FragmentSpread {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
-impl fmt::Display for Directive {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&to_string(self))
-    }
-}
+macro_rules! impl_display {
+    ($( $typ: ident ),+) => {
+        $(
+            impl fmt::Display for $typ {
+                fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+                    f.write_str(&to_string(self))
+                }
+            }
+        )+
+    };
+}
+impl_display!(
+    Document,
+    Definition,
+    OperationDefinition,
+    FragmentDefinition,
+    SelectionSet,
+    Field,
+    Query,
+    Mutation,
+    Subscription,
+    VariableDefinition,
+    VariableType,
+    Value,
+    InlineFragment,
+    TypeCondition,
+    FragmentSpread,
+    Directive
+);
+