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Cajoled visual studio into issuing intelligent error messages

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when an unserializable type is in the parameter pack.
This commit is contained in:
Cheng 2023-10-02 01:49:03 +00:00
parent dbe030ba21
commit 7ba674c29a
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2 changed files with 6 additions and 1 deletions
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4
src/ristretto255.h
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@ -195,10 +195,12 @@ namespace ristretto255 {
if (i) throw HashReuseException();
}
template< has_machine_independent_representation T, typename... Args>explicit hash(const T& first, Args... args) {
// not restraining the variant args by concept, because they get caught deeper in,
// and visual studio reporting of variant concept errors sucks.
hsh<hashsize> in;
in << first;
if constexpr (sizeof...(args) > 0) {
in.hashinto( args...);
in.hashinto( ro::trigger_error(args)...);
}
int i = crypto_generichash_blake2b_final(
&in.st,

3
src/serialization.h
View File

@ -317,6 +317,9 @@
template<typename... Args>
concept has_machine_independent_representation = serializable<Args...>();
template<has_machine_independent_representation T>
T trigger_error(T x) { return x; };
static_assert( !has_machine_independent_representation<double>
&& has_machine_independent_representation<std::span<const byte>, char*, std::span<const char>>,
"concepts needed");