Rename ScalarValue derive

Fixes #299.

Author: LegNeato

integration_tests/juniper_tests/src/custom_scalar.rs

@@ -9,7 +9,7 @@ use juniper::{execute, EmptyMutation, Object, RootNode, Variables};
 use juniper::{InputValue, ParseScalarResult, ScalarValue, Value};
 use std::fmt;
 
-#[derive(Debug, Clone, PartialEq, ScalarValue)]
+#[derive(Debug, Clone, PartialEq, GraphQLScalarValue)]
 enum MyScalarValue {
     Int(i32),
     Long(i64),

juniper/CHANGELOG.md

@@ -1,6 +1,7 @@
 # master
 
 - The minimum required Rust version is now `1.30.0`.
+- The `ScalarValue` custom derive has been renamed to `GraphQLScalarValue`.
 
 # [0.11.1] 2018-12-19
 

juniper/src/value/scalar.rs

@@ -18,7 +18,7 @@ pub trait ParseScalarValue<S = DefaultScalarValue> {
 /// The main objective of this abstraction is to allow other libraries to
 /// replace the default representation with something that better fits thei
 /// needs.
-/// There is a custom derive (`#[derive(ScalarValue)]`) available that implements
+/// There is a custom derive (`#[derive(GraphQLScalarValue)]`) available that implements
 /// most of the required traits automatically for a enum representing a scalar value.
 /// This derives needs a additional annotation of the form
 /// `#[juniper(visitor = "VisitorType")]` to specify a type that implements
@@ -38,7 +38,7 @@ pub trait ParseScalarValue<S = DefaultScalarValue> {
 /// # use juniper::ScalarValue;
 /// # use std::fmt;
 /// #
-/// #[derive(Debug, Clone, PartialEq, ScalarValue)]
+/// #[derive(Debug, Clone, PartialEq, GraphQLScalarValue)]
 /// enum MyScalarValue {
 ///     Int(i32),
 ///     Long(i64),

juniper_codegen/src/derive_scalar_value.rs

@@ -8,7 +8,7 @@ pub fn impl_scalar_value(ast: &syn::DeriveInput, is_internal: bool) -> TokenStre
     let variants = match ast.data {
         Data::Enum(ref enum_data) => &enum_data.variants,
         _ => {
-            panic!("#[derive(ScalarValue)] may only be applied to enums, not to structs");
+            panic!("#[derive(GraphQLScalarValue)] may only be applied to enums, not to structs");
         }
     };
 

juniper_codegen/src/lib.rs

@@ -61,7 +61,7 @@ pub fn derive_object(input: TokenStream) -> TokenStream {
     gen.into()
 }
 
-#[proc_macro_derive(ScalarValue)]
+#[proc_macro_derive(GraphQLScalarValue)]
 pub fn derive_scalar_value(input: TokenStream) -> TokenStream {
     let ast = syn::parse::<syn::DeriveInput>(input).unwrap();
     let gen = derive_scalar_value::impl_scalar_value(&ast, false);