folly::FormatKeyNotFoundException Class Reference

#include <Format.h>

Inheritance diagram for folly::FormatKeyNotFoundException:

Public Member Functions
	FormatKeyNotFoundException (StringPiece key)
char const *	key () const noexcept

Static Private Attributes
static constexpr StringPiece const	kMessagePrefix = "format key not found: "

Detailed Description

Exception class thrown when a format key is not found in the given associative container keyed by strings. We inherit std::out_of_range for compatibility with callers that expect exception to be thrown directly by std::map or std::unordered_map.

Having the key be at the end of the message string, we can access it by simply adding its offset to what(). Not storing separate std::string key makes the exception type small and noexcept-copyable like std::out_of_range, and therefore able to fit in-situ in exception_wrapper.

Definition at line 322 of file Format.h.

Constructor & Destructor Documentation

folly::FormatKeyNotFoundException::FormatKeyNotFoundException ( StringPiece  key )

explicit

Definition at line 422 of file Format.cpp.

References kMessagePrefix.

    : std::out_of_range(kMessagePrefix.str() + key.str()) {}

Member Function Documentation

char const* folly::FormatKeyNotFoundException::key ( ) const

inlinenoexcept

Definition at line 326 of file Format.h.

Referenced by TEST().

                                   {
    return what() + kMessagePrefix.size();
  }

Member Data Documentation

constexpr StringPiece const folly::FormatKeyNotFoundException::kMessagePrefix = "format key not found: "

staticprivate

Definition at line 331 of file Format.h.

Referenced by FormatKeyNotFoundException().

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The documentation for this class was generated from the following files:

• proxygen/folly/folly/Format.h
• proxygen/folly/folly/Format.cpp