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fix: resolve C++26 template ambiguity for std::complex (#1278)

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In C++26, std::complex gained a tuple interface (P2819R2), causing
template specialization ambiguity in type_count and type_count_min.

This change explicitly excludes is_complex from tuple-like template
specializations, ensuring complex types are handled only by their
dedicated specializations.

Fixes #1098

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
This commit is contained in:
Neeraj611
2026-01-02 23:37:31 +05:30
committed by GitHub
parent 20e9132dfc
commit aa5360b9ea
1 changed files with 4 additions and 2 deletions
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6
include/CLI/TypeTools.hpp
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@@ -544,7 +544,8 @@ template <typename T, std::size_t I>
}
/// Get the type size of the sum of type sizes for all the individual tuple types
template <typename T> struct type_count<T, typename std::enable_if<is_tuple_like<T>::value>::type> {
template <typename T>
struct type_count<T, typename std::enable_if<is_tuple_like<T>::value && !is_complex<T>::value>::type> {
static constexpr int value{tuple_type_size<T, 0>()};
};
@@ -593,7 +594,8 @@ template <typename T, std::size_t I>
}
/// Get the type size of the sum of type sizes for all the individual tuple types
template <typename T> struct type_count_min<T, typename std::enable_if<is_tuple_like<T>::value>::type> {
template <typename T>
struct type_count_min<T, typename std::enable_if<is_tuple_like<T>::value && !is_complex<T>::value>::type> {
static constexpr int value{tuple_type_size_min<T, 0>()};
};