[skip ci] attempt at is_basic_claim check

Thalhammer · May 26, 2020 · bcd7e3f · bcd7e3f
1 parent 146e677
commit bcd7e3f
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diff --git a/include/jwt-cpp/jwt.h b/include/jwt-cpp/jwt.h
@@ -1090,6 +1090,17 @@ namespace jwt {
 	value_type, object_type, array_type, string_type, \
 	boolean_type, integer_type, number_type, traits
 
+	namespace details {
+		template <template <typename...> class, template<typename...> class> 
+		struct is_same_template : std::false_type{};
+
+		template <template <typename...> class T>
+		struct is_same_template<T,T> : std::true_type{};
+
+		template<template <typename...> class basic_claim_type>
+		using is_basic_claim = is_same_template<basic_claim_type, basic_claim>;
+	}
+
 	/**
 	 * Base class that represents a token payload.
 	 * Contains Convenience accessors for common claims.

diff --git a/tests/NlohmannTest.cpp b/tests/NlohmannTest.cpp
@@ -93,6 +93,8 @@ TEST(NholmannTest, BasicClaims) {
 	using nholmann_claim =
 			jwt::basic_claim<JWT_NHOLMANN_CLAIM_TPL>;
 
+	static_assert(jwt::details::is_basic_claim<nholmann_claim>::value, "must be basic claim");
+
 	const auto string = nholmann_claim(std::string("string"));
 	const auto array = nholmann_claim(std::set<std::string>{"string", "string"});
 	const auto integer = nholmann_claim(159816816);