| 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.
| 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 |
In C++11, these constants were specified with redundant keyword static, which was removed by C++14 via LWG issue 2053.
| (C++11)
| reports errors generated by the regular expressions library (class) |
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