From 52f9ecfc4dac65d305fd920e8c7f748889a0804f Mon Sep 17 00:00:00 2001 From: Nadrieril Date: Mon, 12 Aug 2019 23:24:48 +0200 Subject: Move api into its own crate --- dhall/src/api/static_type.rs | 93 -------------------------------------------- 1 file changed, 93 deletions(-) delete mode 100644 dhall/src/api/static_type.rs (limited to 'dhall/src/api/static_type.rs') diff --git a/dhall/src/api/static_type.rs b/dhall/src/api/static_type.rs deleted file mode 100644 index 906bcef..0000000 --- a/dhall/src/api/static_type.rs +++ /dev/null @@ -1,93 +0,0 @@ -use dhall_syntax::{Builtin, Integer, Natural}; - -use crate::api::Type; - -/// A Rust type that can be represented as a Dhall type. -/// -/// A typical example is `Option`, -/// represented by the dhall expression `Optional Bool`. -/// -/// This trait can and should be automatically derived. -/// -/// The representation needs to be independent of the value. -/// For this reason, something like `HashMap` cannot implement -/// [StaticType] because each different value would -/// have a different Dhall record type. -pub trait StaticType { - fn static_type() -> Type; -} - -macro_rules! derive_builtin { - ($ty:ty, $builtin:ident) => { - impl StaticType for $ty { - fn static_type() -> Type { - Type::make_builtin_type(Builtin::$builtin) - } - } - }; -} - -derive_builtin!(bool, Bool); -derive_builtin!(Natural, Natural); -derive_builtin!(u64, Natural); -derive_builtin!(Integer, Integer); -derive_builtin!(String, Text); - -impl StaticType for (A, B) -where - A: StaticType, - B: StaticType, -{ - fn static_type() -> Type { - Type::make_record_type( - vec![ - ("_1".to_owned(), A::static_type()), - ("_2".to_owned(), B::static_type()), - ] - .into_iter(), - ) - } -} - -impl StaticType for std::result::Result -where - T: StaticType, - E: StaticType, -{ - fn static_type() -> Type { - Type::make_union_type( - vec![ - ("Ok".to_owned(), Some(T::static_type())), - ("Err".to_owned(), Some(E::static_type())), - ] - .into_iter(), - ) - } -} - -impl StaticType for Option -where - T: StaticType, -{ - fn static_type() -> Type { - Type::make_optional_type(T::static_type()) - } -} - -impl StaticType for Vec -where - T: StaticType, -{ - fn static_type() -> Type { - Type::make_list_type(T::static_type()) - } -} - -impl<'a, T> StaticType for &'a T -where - T: StaticType, -{ - fn static_type() -> Type { - T::static_type() - } -} -- cgit v1.2.3