std::regex_constants::error_type

Defined in header `<regex>`
typedef /implementation defined/ error_type;		(since C++11)
constexpr error_type error_collate = /unspecified/; constexpr error_type error_ctype = /unspecified/; constexpr error_type error_escape = /unspecified/; constexpr error_type error_backref = /unspecified/; constexpr error_type error_brack = /unspecified/; constexpr error_type error_paren = /unspecified/; constexpr error_type error_brace = /unspecified/; constexpr error_type error_badbrace = /unspecified/; constexpr error_type error_range = /unspecified/; constexpr error_type error_space = /unspecified/; constexpr error_type error_badrepeat = /unspecified/; constexpr error_type error_complexity = /unspecified/; constexpr error_type error_stack = /unspecified/;		(since C++11)

Defined in header <regex>

typedef /*implementation defined*/ error_type;

(since C++11)

constexpr error_type error_collate = /*unspecified*/;
constexpr error_type error_ctype = /*unspecified*/;
constexpr error_type error_escape = /*unspecified*/;
constexpr error_type error_backref = /*unspecified*/;
constexpr error_type error_brack = /*unspecified*/;
constexpr error_type error_paren = /*unspecified*/;
constexpr error_type error_brace = /*unspecified*/;
constexpr error_type error_badbrace = /*unspecified*/;
constexpr error_type error_range = /*unspecified*/;
constexpr error_type error_space = /*unspecified*/;
constexpr error_type error_badrepeat = /*unspecified*/;
constexpr error_type error_complexity = /*unspecified*/;
constexpr error_type error_stack = /*unspecified*/;

(since C++11)

The error_type is a type that describes errors that may occur during regular expression parsing.

Constants

Constant	Explanation
`error_collate`	the expression contains an invalid collating element name
`error_ctype`	the expression contains an invalid character class name
`error_escape`	the expression contains an invalid escaped character or a trailing escape
`error_backref`	the expression contains an invalid back reference
`error_brack`	the expression contains mismatched square brackets ('[' and ']')
`error_paren`	the expression contains mismatched parentheses ('(' and ')')
`error_brace`	the expression contains mismatched curly braces ('{' and '}')
`error_badbrace`	the expression contains an invalid range in a {} expression
`error_range`	the expression contains an invalid character range (e.g. [b-a])
`error_space`	there was not enough memory to convert the expression into a finite state machine
`error_badrepeat`	one of *?+{ was not preceded by a valid regular expression
`error_complexity`	the complexity of an attempted match exceeded a predefined level
`error_stack`	there was not enough memory to perform a match

Notes

In C++11, these constants were specified with redundant keyword static, which was removed by C++14 via LWG issue 2053.

std::regex_constants::error_type

Constants

Notes

See also