esphome::Callback< X > Struct Template Reference
Lightweight type-erased callback (8 bytes on 32-bit) that avoids std::function overhead. More...
Detailed Description
template<typename... X>
struct esphome::Callback< X >
struct esphome::Callback< X >
Lightweight type-erased callback (8 bytes on 32-bit) that avoids std::function overhead.
No null check, no exceptions, no heap allocation for small trivially-copyable callables.
With C++20 if constexpr, automatically detects [this] lambdas (sizeof <= sizeof(void*), trivially copyable) and stores them inline. Larger callables are heap-allocated.
The documentation for this struct was generated from the following file:
- esphome/core/helpers.h
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1.12.0