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add comments for composite, add values method for composte

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ado 2020-12-12 23:40:46 +01:00
parent a06121ff92
commit 7b6794c4fa
1 changed files with 10 additions and 0 deletions
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10
include/ss/parser.hpp
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@ -90,6 +90,12 @@ class parser {
: values_{values}, parser_{parser} {
}
// tries to convert the same line as different output if the
// previous conversion was not successful, returns composite
// containing itself and the new output as optional
// if a parameter is passed which can be invoked with
// the new output, it will be invoked if the returned value
// of the conversion is valid
template <typename... Us, typename Fun = None>
composite<Ts..., std::optional<no_void_validator_tup_t<Us...>>>
or_else(Fun&& fun = None{}) {
@ -112,6 +118,8 @@ class parser {
return {std::move(values), parser_};
}
auto values() { return values_; }
private:
template <typename U, typename... Us>
no_void_validator_tup_t<U, Us...> try_same() {
@ -128,6 +136,8 @@ class parser {
parser& parser_;
};
// tries to convert a line, but returns a composite which is
// able to chain additional conversions in case of failure
template <typename... Ts, typename Fun = None>
composite<std::optional<no_void_validator_tup_t<Ts...>>> try_next(
Fun&& fun = None{}) {