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restinio::easy_parser::impl::alternatives_clause_t< Subitems_Tuple > Class Template Reference

A template for implementation of clause that selects one of alternative clauses. More...

#include <easy_parser.hpp>

Inheritance diagram for restinio::easy_parser::impl::alternatives_clause_t< Subitems_Tuple >:
restinio::easy_parser::impl::clause_tag

Public Member Functions

 alternatives_clause_t (Subitems_Tuple &&subitems)
 
template<typename Target_Type >
RESTINIO_NODISCARD optional_t< parse_error_ttry_process (source_t &from, Target_Type &target)
 

Private Attributes

Subitems_Tuple m_subitems
 

Additional Inherited Members

- Static Public Attributes inherited from restinio::easy_parser::impl::clause_tag
static constexpr entity_type_t entity_type = entity_type_t::clause
 

Detailed Description

template<typename Subitems_Tuple>
class restinio::easy_parser::impl::alternatives_clause_t< Subitems_Tuple >

A template for implementation of clause that selects one of alternative clauses.

This template implements rules like:

T := A | B | C

It works very simple way:

If no one of alternatives is selected then the current position in the input stream is restored.

Note
The copy of Target_Type object passed to try_process method is created before checking each alternative.
Template Parameters
Subitems_Tuplethe type of std::tuple with items for every alternative clauses.
Since
v.0.6.1

Definition at line 1635 of file easy_parser.hpp.

Constructor & Destructor Documentation

◆ alternatives_clause_t()

template<typename Subitems_Tuple >
restinio::easy_parser::impl::alternatives_clause_t< Subitems_Tuple >::alternatives_clause_t ( Subitems_Tuple &&  subitems)
inline

Definition at line 1640 of file easy_parser.hpp.

Member Function Documentation

◆ try_process()

template<typename Subitems_Tuple >
template<typename Target_Type >
RESTINIO_NODISCARD optional_t< parse_error_t > restinio::easy_parser::impl::alternatives_clause_t< Subitems_Tuple >::try_process ( source_t from,
Target_Type &  target 
)
inline

Definition at line 1648 of file easy_parser.hpp.

Member Data Documentation

◆ m_subitems

template<typename Subitems_Tuple >
Subitems_Tuple restinio::easy_parser::impl::alternatives_clause_t< Subitems_Tuple >::m_subitems
private

Definition at line 1637 of file easy_parser.hpp.


The documentation for this class was generated from the following file: