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爲什麼在添加捕獲元素時以下lambda不符合簽名?C++ Lambda導致'候選功能不可行:'
[&callback](unsigned handle, void* userData, void* data, unsigned size) -> void { ... }
但這會呢?
[](unsigned handle, void* userData, void* data, unsigned size) -> void { ... }
簽名:
typedef void (*em_async_wget2_data_onload_func)(unsigned, void*, void*, unsigned);