Try to split a string into a fixed number of fields by delimiter, using folly::tryTo<> for conversions. types by delimiter. - On success, all output values will be initialized and the 'Unit{}' value is returned. Arguments are assigned in reverse order. - On failure, the first failing 'ConversionCode' is returned with its associated substring in a 'SubstringConversionCode'. - String splitting is performed prior to each conversion; field values will not contain the delimiter. - All custom error codes are mapped to ConversionCode::CUSTOM.
Declared in <folly/String.h>
template<
class Delim,
class... OutputTypes>
requires StrictConjunction<IsConvertible<OutputTypes>...>::value
Expected<Unit, SubstringConversionCode>
trySplitTo(
StringPiece input,
Delim const& delimiter,
OutputTypes&... outputs);Examples:
folly::StringPiece name, key, value; if (folly::trySplitTo(line, 't', name, key, value)) ...
folly::StringPiece name; double value; int id; if (folly::trySplitTo(line, 't', name, value, id)) ...
Unit on success, or the first conversion error on failure.
| Name | Description |
|---|---|
| input | The string to split. |
| delimiter | The delimiter to split on. |
| outputs | The output fields to populate, in reverse order. |