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| author | Adrian Kummerlaender | 2015-01-16 22:08:09 +0100 |
|---|---|---|
| committer | Adrian Kummerlaender | 2015-01-16 22:08:09 +0100 |
| commit | 01029e59e8eda0a160291c3c92f9db5b1cac54d3 (patch) | |
| tree | 68aa6f35c44b7aa6b3e69e4c72047515826a02e2 /src | |
| parent | 5ead1bfab50ef7b3f746f298c53788c833f03ce4 (diff) | |
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Implemented basic `Cons` value type and `List` constructor
* `Cons` is a straigth forward type _pair_ containing `car` and `cdr` typedefs
** they may be accessed using `Car` and `Cdr` helper template aliases
** there is no enforcement of _Cons_ structure and type equality whatsoever
*** i.e. similar to Scheme and different from how it is implemented in _ConstList_
* `List` is a recursive variadic helper template for constructing `Cons` value types
** simplifies _Cons_ construction and may be expanded to offer type deduction and built upon to enforce type equality
* added appropriate test cases
Diffstat (limited to 'src')
| -rw-r--r-- | src/list/cons.h | 23 | ||||
| -rw-r--r-- | src/list/list.h | 26 |
2 files changed, 49 insertions, 0 deletions
diff --git a/src/list/cons.h b/src/list/cons.h new file mode 100644 index 0000000..b858c4c --- /dev/null +++ b/src/list/cons.h @@ -0,0 +1,23 @@ +#ifndef TYPEASVALUE_SRC_LIST_CONS_H_ +#define TYPEASVALUE_SRC_LIST_CONS_H_ + +namespace tav { + +template < + typename CAR, + typename CDR +> +struct Cons { + typedef CAR car; + typedef CDR cdr; +}; + +template <typename Cons> +using Car = typename Cons::car; + +template <typename Cons> +using Cdr = typename Cons::cdr; + +} + +#endif // TYPEASVALUE_SRC_LIST_CONS_H_ diff --git a/src/list/list.h b/src/list/list.h new file mode 100644 index 0000000..47d0d2f --- /dev/null +++ b/src/list/list.h @@ -0,0 +1,26 @@ +#ifndef TYPEASVALUE_SRC_LIST_LIST_H_ +#define TYPEASVALUE_SRC_LIST_LIST_H_ + +#include "cons.h" + +namespace tav { + +template < + typename Head, + typename... Tail +> +struct List { + typedef Cons< + Head, + typename List<Tail...>::type + > type; +}; + +template <typename Head> +struct List<Head> { + typedef Cons<Head, void> type; +}; + +} + +#endif // TYPEASVALUE_SRC_LIST_LIST_H_ |