fst4_cli::Stdin_Data_File Class Reference

Public Member Functions
const std::string &	path () const
	the buffer file's path; what the data-format readers actually open when --data -

Private Member Functions
	Stdin_Data_File (const Stdin_Data_File &)
	the temporary file has one owner
Stdin_Data_File &	operator= (const Stdin_Data_File &)
	the temporary file has one owner
void	remove_file ()

Private Attributes
std::string	_path
	path of the temporary file backing the buffered stdin

Detailed Description

--data -: the dataset arrives on stdin (the upstream half of the Unix-pipe story; the downstream half is the prose-free stdout of the machine output formats). A pipe is not seekable and is consumed once, while the readers need both: the TRN reader seeks back to the data start after the header scan, and the accessor is constructed again for a --compare-config second scenario. The bytes are therefore buffered ONCE into a temporary file that backs every reader and is removed when the run ends. std::filesystem (C++17) keeps this portable, so no second platform branch is introduced - extern_bridge.hpp stays the only platform-sensitive code in FST4.

Member Function Documentation

remove_file()

void fst4_cli::Stdin_Data_File::remove_file ( )

inlineprivate

must never throw: it also runs from the destructor. std::filesystem::remove's error_code overload is noexcept, but constructing the path argument from _path allocates, so the catch-all is what actually makes this destructor-safe

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

• /Users/psms/dev/devtest1/fst4.cpp