filesystem-error-class.md

description	title	ms.date	f1_keywords	ms.assetid
Learn more about: filesystem_error Class	filesystem_error Class	09/10/2018	filesystem/std::experimental::filesystem::filesystem_error	c53aac27-c1fa-43e4-8967-48ea8ba1f172

filesystem_error Class

A base class for all exceptions that are thrown to report a low-level system overflow.

Syntax

classfilesystem_error : publicsystem_error;

Remarks

The class serves as the base class for all exceptions thrown to report an error in <filesystem> functions. It stores an object of type string, called mymesg here for the purposes of exposition. It also stores two objects of type path, called mypval1 and mypval2.

Members

Constructors

Name	Description
filesystem_error	Constructs a filesystem_error message.

Functions

Name	Description
path1	Returns mypval1
path2	Returns mypval2
what	Returns a pointer to an NTBS.

Requirements

Header: <filesystem>

Namespace: std::experimental::filesystem

filesystem_error

The first constructor constructs its message from what_arg and ec. The second constructor also constructs its message from pval1, which it stores in mypval1. The third constructor also constructs its message from pval1, which it stores in mypval1, and from pval2, which it stores in mypval2.

filesystem_error(const string& what_arg, error_code ec); filesystem_error(const string& what_arg, const path& pval1, error_code ec); filesystem_error(const string& what_arg, const path& pval1, const path& pval2, error_code ec);

Parameters

what_arg
Specified message.

ec
Specified error code.

mypval1
Further specified message parameter.

mypval2
Further specified message parameter.

path1

The member function returns mypval1

const path& path1() constnoexcept;

path2

The member function returns mypval2

const path& path2() constnoexcept;

what

The member function returns a pointer to an NTBS, preferably composed from runtime_error::what(), system_error::what(), mymesg, mypval1.native_string(), and mypval2.native_string().

constchar *what() constnoexcept;