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45 lines
986 B
C++
45 lines
986 B
C++
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#pragma once
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#include <type_traits>
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#include <typeinfo>
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#include <typeindex>
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#include <string>
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#include <Common/Exception.h>
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#include <common/demangle.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int BAD_CAST;
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}
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}
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/** Perform static_cast in release build.
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* Checks type by comparing typeid and throw an exception in debug build.
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* The exact match of the type is checked. That is, cast to the ancestor will be unsuccessful.
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*/
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template <typename To, typename From>
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To assert_cast(From && from)
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{
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#ifndef NDEBUG
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try
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{
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if (typeid(from) == typeid(To))
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return static_cast<To>(from);
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}
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catch (const std::exception & e)
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{
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throw DB::Exception(e.what(), DB::ErrorCodes::BAD_CAST);
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}
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throw DB::Exception("Bad cast from type " + demangle(typeid(from).name()) + " to " + demangle(typeid(To).name()),
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DB::ErrorCodes::BAD_CAST);
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#else
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return static_cast<To>(from);
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#endif
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}
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