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easy_parser.hpp File Reference

An very small, simple and somewhat limited implementation of recursive-descent parser. More...

`#include <restinio/impl/to_lower_lut.hpp>`
`#include <restinio/impl/overflow_controlled_integer_accumulator.hpp>`
`#include <restinio/utils/tuple_algorithms.hpp>`
`#include <restinio/utils/metaprogramming.hpp>`
`#include <restinio/string_view.hpp>`
`#include <restinio/compiler_features.hpp>`
`#include <restinio/exception.hpp>`
`#include <restinio/optional.hpp>`
`#include <restinio/expected.hpp>`
`#include <iostream>`
`#include <limits>`
`#include <map>`
`#include <array>`
`#include <vector>`
`#include <cstring>`

Go to the source code of this file.

## Classes

class | restinio::easy_parser::parse_error_t
| Information about parsing error. More...
struct | restinio::easy_parser::nothing_t
| A special type to be used in the case where there is no need to store produced value. More...
struct | restinio::easy_parser::result_value_wrapper< T >
| A template with specializations for different kind of result values and for type `nothing`. More...
struct | restinio::easy_parser::result_wrapper_for< T >
| A metafunction for detection of actual result_value_wrapper type for T. More...
struct | restinio::easy_parser::result_value_wrapper< std::vector< T, Args... > >
struct | restinio::easy_parser::impl::std_array_wrapper< T, S >
| A special wrapper for std::array type to be used inside a producer during the parsing. More...
struct | restinio::easy_parser::result_value_wrapper< std::array< T, S > >
struct | restinio::easy_parser::result_wrapper_for< impl::std_array_wrapper< T, S > >
| A specialization of result_wrapper_for metafunction for the case of std::array wrapper. More...
struct | restinio::easy_parser::result_value_wrapper< std::basic_string< Char, Args... > >
struct | restinio::easy_parser::result_value_wrapper< std::map< K, V, Args... > >
struct | restinio::easy_parser::result_value_wrapper< nothing_t >
class | restinio::easy_parser::digits_to_consume_t
| Limits for number of digits to be extracted during parsing of decimal numbers. More...
struct | restinio::easy_parser::impl::character_t
| One character extracted from the input stream. More...
struct | restinio::easy_parser::impl::is_space_predicate_t
| A preducate for symbol_producer_template that checks that a symbol is a space. More...
struct | restinio::easy_parser::impl::is_digit_predicate_t
| A predicate for cases where char to be expected to be a decimal digit. More...
struct | restinio::easy_parser::impl::is_hexdigit_predicate_t
| A predicate for cases where char to be expected to be a hexadecimal digit. More...
class | restinio::easy_parser::impl::source_t
| The class that implements "input stream". More...
class | restinio::easy_parser::impl::source_t::content_consumer_t
| A helper class to automatically return acquired content back to the input stream. More...
struct | restinio::easy_parser::impl::producer_tag< Result_Type >
| A special base class to be used with producers. More...
struct | restinio::easy_parser::impl::is_producer< T, typename >
struct | restinio::easy_parser::impl::is_producer< T, meta::void_t< decltype(T::entity_type) > >
struct | restinio::easy_parser::impl::transformer_tag< Result_Type >
| A special base class to be used with transformers. More...
struct | restinio::easy_parser::impl::is_transformer< T, typename >
struct | restinio::easy_parser::impl::is_transformer< T, meta::void_t< decltype(T::entity_type) > >
struct | restinio::easy_parser::impl::transformer_invoker< Result_Type >
| A helper template for calling transformation function. More...
struct | restinio::easy_parser::impl::transformer_invoker< expected_t< Result_Type, error_reason_t > >
struct | restinio::easy_parser::impl::is_appropriate_transformer_result_type< Result_Type >
| A metafunction that checks is Result_Type can be used as the result of transformation method. More...
struct | restinio::easy_parser::impl::is_appropriate_transformer_result_type< expected_t< Result_Type, error_reason_t > >
struct | restinio::easy_parser::impl::is_appropriate_transformer_result_type< expected_t< Result_Type, parse_error_t > >
struct | restinio::easy_parser::impl::transformed_value_producer_traits_checker< Producer, Transformer >
| A helper template for checking a possibility to connect a producer with a transformer. More...
class | restinio::easy_parser::impl::transformed_value_producer_t< Producer, Transformer >
| A template of producer that gets a value from another producer, transforms it and produces transformed value. More...
struct | restinio::easy_parser::impl::transformer_proxy_tag
| A special base class to be used with transformer-proxies. More...
struct | restinio::easy_parser::impl::is_transformer_proxy< T, typename >
struct | restinio::easy_parser::impl::is_transformer_proxy< T, meta::void_t< decltype(T::entity_type) > >
struct | restinio::easy_parser::impl::consumer_tag
| A special base class to be used with consumers. More...
struct | restinio::easy_parser::impl::is_consumer< T, typename >
struct | restinio::easy_parser::impl::is_consumer< T, meta::void_t< decltype(T::entity_type) > >
struct | restinio::easy_parser::impl::clause_tag
| A special base class to be used with clauses. More...
struct | restinio::easy_parser::impl::is_clause< T, typename >
struct | restinio::easy_parser::impl::is_clause< T, meta::void_t< decltype(std::decay_t< T >::entity_type) > >
class | restinio::easy_parser::impl::consume_value_clause_t< P, C >
| A template for a clause that binds a value producer with value consumer. More...
class | restinio::easy_parser::impl::top_level_clause_t< Producer >
| A special class to be used as the top level clause in parser. More...
class | restinio::easy_parser::impl::alternatives_clause_t< Subitems_Tuple >
| A template for implementation of clause that selects one of alternative clauses. More...
class | restinio::easy_parser::impl::maybe_clause_t< Subitems_Tuple >
| A template for implementation of clause that checks and handles presence of optional entity in the input stream. More...
class | restinio::easy_parser::impl::not_clause_t< Subitems_Tuple >
| A template for implementation of clause that checks absence of some entity in the input stream. More...
class | restinio::easy_parser::impl::and_clause_t< Subitems_Tuple >
| A template for implementation of clause that checks the presence of some entity in the input stream. More...
class | restinio::easy_parser::impl::sequence_clause_t< Subitems_Tuple >
| A template for implementation of clause that checks and handles presence of sequence of entities in the input stream. More...
class | restinio::easy_parser::impl::forced_alternative_clause_t< Subitems_Tuple >
| An alternative that should be parsed correctly or the parsing of the whole alternatives clause should fail. More...
class | restinio::easy_parser::impl::produce_t< Target_Type, Subitems_Tuple >
| A template for producing a value of specific type of a sequence of entities from the input stream. More...
class | restinio::easy_parser::impl::repeat_clause_t< Subitems_Tuple >
| A template for handling repetition of clauses. More...
class | restinio::easy_parser::impl::symbol_producer_template_t< Predicate >
| A template for producer of charachers that satisfy some predicate. More...
struct | restinio::easy_parser::impl::any_symbol_predicate_t
| A predicate that allows extraction of any symbol. More...
struct | restinio::easy_parser::impl::particular_symbol_predicate_t
| A predicate for cases where exact match of expected and actual symbols is required. More...
struct | restinio::easy_parser::impl::not_particular_symbol_predicate_t
| A predicate for cases where mismatch with a particular symbol is required. More...
struct | restinio::easy_parser::impl::caseless_particular_symbol_predicate_t
| A predicate for cases where the case-insensitive match of expected and actual symbols is required. More...
struct | restinio::easy_parser::impl::symbol_from_range_predicate_t
| A predicate for cases where a symbol should belong to specified range. More...
class | restinio::easy_parser::impl::symbol_producer_t
| A producer for the case when a particual character is expected in the input stream. More...
class | restinio::easy_parser::impl::any_symbol_if_not_producer_t
| A producer for the case when any character except the specific sentinel character is expected in the input stream. More...
class | restinio::easy_parser::impl::caseless_symbol_producer_t
| A producer for the case when a particual character is expected in the input stream. More...
class | restinio::easy_parser::impl::symbol_from_range_producer_t
| A producer for the case when a symbol should belong to specified range. More...
class | restinio::easy_parser::impl::digit_producer_t
| A producer for the case when a decimal digit is expected in the input stream. More...
class | restinio::easy_parser::impl::hexdigit_producer_t
| A producer for the case when a hexadecimal digit is expected in the input stream. More...
class | restinio::easy_parser::impl::non_negative_decimal_number_producer_t< T >
| A producer for the case when a non-negative decimal number is expected in the input stream. More...
class | restinio::easy_parser::impl::non_negative_decimal_number_producer_with_digits_limit_t< T >
| A producer for the case when a non-negative decimal number is expected in the input stream. More...
class | restinio::easy_parser::impl::hexadecimal_number_producer_t< T >
| A producer for the case when a number in hexadecimal form is expected in the input stream. More...
class | restinio::easy_parser::impl::hexadecimal_number_producer_with_digits_limit_t< T >
| A producer for the case when a number in hexadecimal form is expected in the input stream. More...
class | restinio::easy_parser::impl::decimal_number_producer_t< T >
| A producer for the case when a signed decimal number is expected in the input stream. More...
class | restinio::easy_parser::impl::decimal_number_producer_with_digits_limit_t< T >
| A producer for the case when a signed decimal number is expected in the input stream. More...
struct | restinio::easy_parser::impl::any_value_skipper_t
| A special consumer that simply throws any value away. More...
struct | restinio::easy_parser::impl::as_result_consumer_t
| A consumer for the case when the current value should be returned as the result for the producer at one level up. More...
class | restinio::easy_parser::impl::just_result_consumer_t< Result_Type >
| A consumer for the case when a specific value should be used as the result instead of the value produced on the previous step. More...
class | restinio::easy_parser::impl::custom_consumer_t< C >
| A template for consumers that are released by lambda/functional objects. More...
class | restinio::easy_parser::impl::field_setter_consumer_t< F, C >
| A template for consumers that store a value to the specified field of a target object. More...
struct | restinio::easy_parser::impl::tuple_item_consumer_t< Index >
| A consumer that stores a result value at the specified index in the result tuple. More...
struct | restinio::easy_parser::impl::to_lower_transformer_t< std::string >
| An implementation of transformer that converts the content of the input std::string to lower case. More...
struct | restinio::easy_parser::impl::to_lower_transformer_t< char >
| An implementation of transformer that converts the content of the input character to lower case. More...
struct | restinio::easy_parser::impl::to_lower_transformer_t< std::array< char, S > >
| An implementation of transformer that converts the content of the input std::array to lower case. More...
struct | restinio::easy_parser::impl::to_lower_transformer_proxy_t
| A proxy for the creation of an appropriate to_lower_transformer. More...
class | restinio::easy_parser::impl::just_value_transformer_t< T >
| A transformer that skips incoming value and returns a value specified by a user. More...
class | restinio::easy_parser::impl::convert_transformer_t< Output_Type, Converter >
| A transformator that uses a user supplied function/functor for conversion a value from one type to another. More...
struct | restinio::easy_parser::impl::conversion_result_type_detector< Result_Type >
| A helper template for the detection of type to be produced as conversion procedure. More...
struct | restinio::easy_parser::impl::conversion_result_type_detector< expected_t< Result_Type, error_reason_t > >
class | restinio::easy_parser::impl::convert_transformer_proxy_t< Converter >
| A proxy for the creation of convert_transformer instances for a specific value producers. More...
class | restinio::easy_parser::impl::exact_fixed_size_fragment_producer_t< Size >
| A producer that expects a fragment in the input and produces boolean value if that fragment is found. More...
class | restinio::easy_parser::impl::exact_fragment_producer_t
| A producer that expects a fragment in the input and produces boolean value if that fragment is found. More...
class | restinio::easy_parser::impl::caseless_exact_fixed_size_fragment_producer_t< Size >
| A producer that expects a fragment in the input and produces boolean value if that fragment is found. More...
class | restinio::easy_parser::impl::caseless_exact_fragment_producer_t
| A producer that expects a fragment in the input and produces boolean value if that fragment is found. More...
struct | restinio::easy_parser::impl::to_container_consumer_t
| A template for a consumer that stories values into a container. More...

## Namespaces

namespace | restinio
namespace | restinio::easy_parser
namespace | restinio::easy_parser::impl

## Typedefs

template<typename T >
using | restinio::easy_parser::result_wrapper_for_t = typename result_wrapper_for< T >::type
template<typename... Entities>
using | restinio::easy_parser::impl::tuple_of_entities_t = meta::rename_t< meta::transform_t< std::decay, meta::type_list< Entities... > >, std::tuple >
| A helper meta-function to create an actual type of tuple with clauses/producers.
template<typename Result_Type >
using | restinio::easy_parser::impl::conversion_result_type_detector_t = typename conversion_result_type_detector< Result_Type >::type

## Enumerations

enum class | restinio::easy_parser::error_reason_t { restinio::easy_parser::unexpected_character , restinio::easy_parser::unexpected_eof , restinio::easy_parser::no_appropriate_alternative , restinio::easy_parser::pattern_not_found , restinio::easy_parser::unconsumed_input , restinio::easy_parser::illegal_value_found , restinio::easy_parser::force_only_this_alternative_failed }
| Reason of parsing error. More...
enum class | restinio::easy_parser::impl::entity_type_t { restinio::easy_parser::impl::producer , restinio::easy_parser::impl::transformer , restinio::easy_parser::impl::consumer , restinio::easy_parser::impl::clause , restinio::easy_parser::impl::transformer_proxy }
| A marker for distinguish different kind of entities in parser. More...

## Functions

RESTINIO_NODISCARD constexpr digits_to_consume_t | restinio::easy_parser::expected_digits (digits_to_consume_t::underlying_int_t total) noexcept
| Create a limit for number of digits to be extracted.
RESTINIO_NODISCARD constexpr digits_to_consume_t | restinio::easy_parser::expected_digits (digits_to_consume_t::underlying_int_t min, digits_to_consume_t::underlying_int_t max) noexcept
| Create a limit for number of digits to be extracted.
RESTINIO_NODISCARD bool | restinio::easy_parser::impl::operator== (const character_t &a, const character_t &b) noexcept
RESTINIO_NODISCARD bool | restinio::easy_parser::impl::operator!= (const character_t &a, const character_t &b) noexcept
RESTINIO_NODISCARD constexpr bool | restinio::easy_parser::impl::is_space (const char ch) noexcept
| If a character a space character?
RESTINIO_NODISCARD constexpr bool | restinio::easy_parser::impl::is_digit (const char ch) noexcept
| Is a character a decimal digit?
RESTINIO_NODISCARD constexpr bool | restinio::easy_parser::impl::is_hexdigit (const char ch) noexcept
| Is a character a hexadecimal digit?
template<typename P , typename T >
RESTINIO_NODISCARD std::enable_if_t< is_producer_v< P > &is_transformer_v< T >, transformed_value_producer_t< P, T > > | restinio::easy_parser::impl::operator>> (P producer, T transformer)
| A special operator to connect a value producer with value transformer.
template<typename P , typename T , typename S = std::enable_if_t< is_producer_v<P> & is_transformer_proxy_v<T>, void >>
RESTINIO_NODISCARD auto | restinio::easy_parser::impl::operator>> (P producer, T transformer_proxy)
| A special operator to connect a value producer with value transformer via transformer-proxy.
template<typename P , typename C >
RESTINIO_NODISCARD std::enable_if_t< is_producer_v< P > &&is_consumer_v< C >, consume_value_clause_t< P, C > > | restinio::easy_parser::impl::operator>> (P producer, C consumer)
| A special operator to connect a value producer with a value consumer.
RESTINIO_NODISCARD optional_t< parse_error_t > | restinio::easy_parser::impl::ensure_no_remaining_content (source_t &from)
| A special function to check that there is no more actual data in the input stream except whitespaces.
RESTINIO_NODISCARD string_view_t | restinio::easy_parser::impl::remove_trailing_spaces (string_view_t from) noexcept
| Helper function for removal of trailing spaces from a string-view.
template<typename T , typename Value_Accumulator >
RESTINIO_NODISCARD expected_t< T, parse_error_t > | restinio::easy_parser::impl::try_parse_digits_with_digits_limit (source_t &from, digits_to_consume_t digits_limit, Value_Accumulator acc) noexcept
| Helper function for parsing integers with respect to the number of digits to be consumed.
template<typename T , typename Value_Accumulator >
RESTINIO_NODISCARD expected_t< T, parse_error_t > | restinio::easy_parser::impl::try_parse_hexdigits_with_digits_limit (source_t &from, digits_to_consume_t digits_limit, Value_Accumulator acc) noexcept
| Helper function for parsing integers in hexadecimal form.
template<typename P , typename F , typename C >
RESTINIO_NODISCARD std::enable_if_t< is_producer_v< P >, consume_value_clause_t< P, field_setter_consumer_t< F, C > > > | restinio::easy_parser::impl::operator>> (P producer, F C::*member_ptr)
| A special operator to connect a value producer with field_setter_consumer.
template<typename It >
RESTINIO_NODISCARD expected_t< bool, parse_error_t > | restinio::easy_parser::impl::try_parse_exact_fragment (source_t &from, It begin, It end)
template<typename It >
RESTINIO_NODISCARD expected_t< bool, parse_error_t > | restinio::easy_parser::impl::try_parse_caseless_exact_fragment (source_t &from, It begin, It end)
template<typename Target_Type , typename... Clauses>
RESTINIO_NODISCARD auto | restinio::easy_parser::produce (Clauses &&... clauses)
| A factory function to create a producer that creates an instance of the target type by using specified clauses.
template<typename... Clauses>
RESTINIO_NODISCARD auto | restinio::easy_parser::alternatives (Clauses &&... clauses)
| A factory function to create an alternatives clause.
template<typename... Clauses>
RESTINIO_NODISCARD auto | restinio::easy_parser::maybe (Clauses &&... clauses)
| A factory function to create an optional clause.
template<typename... Clauses>
RESTINIO_NODISCARD auto | restinio::easy_parser::not_clause (Clauses &&... clauses)
| A factory function to create a not_clause.
template<typename... Clauses>
RESTINIO_NODISCARD auto | restinio::easy_parser::and_clause (Clauses &&... clauses)
| A factory function to create an and_clause.
template<typename... Clauses>
RESTINIO_NODISCARD auto | restinio::easy_parser::sequence (Clauses &&... clauses)
| A factory function to create a sequence of subclauses.
template<typename... Clauses>
RESTINIO_NODISCARD auto | restinio::easy_parser::force_only_this_alternative (Clauses &&... clauses)
| An alternative that should be parsed correctly or the parsing of the whole alternatives clause should fail.
template<typename... Clauses>
RESTINIO_NODISCARD auto | restinio::easy_parser::repeat (std::size_t min_occurences, std::size_t max_occurences, Clauses &&... clauses)
| A factory function to create repetitor of subclauses.
RESTINIO_NODISCARD auto | restinio::easy_parser::skip () noexcept
| A factory function to create a skip_consumer.
RESTINIO_NODISCARD auto | restinio::easy_parser::any_symbol_p () noexcept
| A factory function to create an any_symbol_producer.
RESTINIO_NODISCARD auto | restinio::easy_parser::symbol_p (char expected) noexcept
| A factory function to create a symbol_producer.
RESTINIO_NODISCARD auto | restinio::easy_parser::any_symbol_if_not_p (char sentinel) noexcept
| A factory function to create a any_symbol_if_not_producer.
RESTINIO_NODISCARD auto | restinio::easy_parser::caseless_symbol_p (char expected) noexcept
| A factory function to create a caseless_symbol_producer.
RESTINIO_NODISCARD auto | restinio::easy_parser::symbol_from_range_p (char left, char right) noexcept
| A factory function to create a symbol_from_range_producer.
RESTINIO_NODISCARD auto | restinio::easy_parser::symbol (char expected) noexcept
| A factory function to create a clause that expects the speficied symbol, extracts it and then skips it.
RESTINIO_NODISCARD auto | restinio::easy_parser::caseless_symbol (char expected) noexcept
| A factory function to create a clause that expects the speficied symbol, extracts it and then skips it.
RESTINIO_NODISCARD auto | restinio::easy_parser::symbol_from_range (char left, char right) noexcept
| A factory function to create a clause that expects a symbol from specified range, extracts it and then skips it.
RESTINIO_NODISCARD auto | restinio::easy_parser::space_p () noexcept
| A factory function to create a space_producer.
RESTINIO_NODISCARD auto | restinio::easy_parser::space () noexcept
| A factory function to create a clause that expects a space, extracts it and then skips it.
RESTINIO_NODISCARD auto | restinio::easy_parser::digit_p () noexcept
| A factory function to create a digit_producer.
RESTINIO_NODISCARD auto | restinio::easy_parser::digit () noexcept
| A factory function to create a clause that expects a decimal digit, extracts it and then skips it.
RESTINIO_NODISCARD auto | restinio::easy_parser::hexdigit_p () noexcept
| A factory function to create a hexdigit_producer.
RESTINIO_NODISCARD auto | restinio::easy_parser::hexdigit () noexcept
| A factory function to create a clause that expects a hexadecimal digit, extracts it and then skips it.
template<typename T >
RESTINIO_NODISCARD auto | restinio::easy_parser::non_negative_decimal_number_p () noexcept
| A factory function to create a non_negative_decimal_number_producer.
template<typename T >
RESTINIO_NODISCARD auto | restinio::easy_parser::non_negative_decimal_number_p (digits_to_consume_t digits_limit) noexcept
| A factory function to create a non_negative_decimal_number_producer.
template<typename T >
RESTINIO_NODISCARD auto | restinio::easy_parser::positive_decimal_number_producer () noexcept
| A factory function to create a producer for non-negative decimal numbers.
template<typename T >
RESTINIO_NODISCARD auto | restinio::easy_parser::hexadecimal_number_p () noexcept
| A factory function to create a hexadecimal_number_producer.
template<typename T >
RESTINIO_NODISCARD auto | restinio::easy_parser::hexadecimal_number_p (digits_to_consume_t digits_limit) noexcept
| A factory function to create a hexadecimal_number_producer.
template<typename T >
RESTINIO_NODISCARD auto | restinio::easy_parser::decimal_number_p () noexcept
| A factory function to create a decimal_number_producer.
template<typename T >
RESTINIO_NODISCARD auto | restinio::easy_parser::decimal_number_p (digits_to_consume_t digits_limit) noexcept
| A factory function to create a decimal_number_producer.
RESTINIO_NODISCARD auto | restinio::easy_parser::as_result () noexcept
| A factory function to create a as_result_consumer.
template<typename F >
RESTINIO_NODISCARD auto | restinio::easy_parser::custom_consumer (F consumer)
| A factory function to create a custom_consumer.
RESTINIO_NODISCARD auto | restinio::easy_parser::to_container ()
| A factory function to create a to_container_consumer.
RESTINIO_NODISCARD auto | restinio::easy_parser::to_lower () noexcept
| A factory function to create a to_lower_transformer.
template<typename T >
RESTINIO_NODISCARD auto | restinio::easy_parser::just (T value) noexcept(noexcept(impl::just_value_transformer_t< T >{value}))
| A special transformer that replaces the produced value by a value specified by a user.
template<typename T >
RESTINIO_NODISCARD auto | restinio::easy_parser::just_result (T value) noexcept(noexcept(impl::just_result_consumer_t< T >{value}))
| A special consumer that replaces the produced value by a value specified by a user and sets that user-specified value as the result.
template<typename Converter >
RESTINIO_NODISCARD auto | restinio::easy_parser::convert (Converter &&converter)
| A factory function to create convert_transformer.
RESTINIO_NODISCARD auto | restinio::easy_parser::exact_p (string_view_t fragment)
| A factory function that creates an instance of exact_fragment_producer.
template<std::size_t Size>
RESTINIO_NODISCARD auto | restinio::easy_parser::exact_p (const char(&fragment)[Size])
| A factory function that creates an instance of exact_fragment_producer.
RESTINIO_NODISCARD auto | restinio::easy_parser::exact (string_view_t fragment)
| A factory function that creates an instance of exact_fragment clause.
template<std::size_t Size>
RESTINIO_NODISCARD auto | restinio::easy_parser::exact (const char(&fragment)[Size])
| A factory function that creates an instance of exact_fragment clause.
RESTINIO_NODISCARD auto | restinio::easy_parser::caseless_exact_p (string_view_t fragment)
| A factory function that creates an instance of caseless_exact_fragment_producer.
template<std::size_t Size>
RESTINIO_NODISCARD auto | restinio::easy_parser::caseless_exact_p (const char(&fragment)[Size])
| A factory function that creates an instance of caseless_exact_fragment_producer.
RESTINIO_NODISCARD auto | restinio::easy_parser::caseless_exact (string_view_t fragment)
| A factory function that creates an instance of caseless_exact_fragment clause.
template<std::size_t Size>
RESTINIO_NODISCARD auto | restinio::easy_parser::caseless_exact (const char(&fragment)[Size])
| A factory function that creates an instance of caseless_exact_fragment clause.
template<typename Producer >
RESTINIO_NODISCARD expected_t< typename Producer::result_type, parse_error_t > | restinio::easy_parser::try_parse (string_view_t from, Producer producer)
| Perform the parsing of the specified content by using specified value producer.
RESTINIO_NODISCARD std::string | restinio::easy_parser::make_error_description (const parse_error_t &error, string_view_t from)
| Make textual description of error returned by try_parse function.

## Variables

constexpr std::size_t | restinio::easy_parser::N = std::numeric_limits<std::size_t>::max()
| A special marker that means infinite repetitions.
constexpr char | restinio::easy_parser::impl::SP = ' '
| A constant for SPACE value.
constexpr char | restinio::easy_parser::impl::HTAB = '\x09'
| A constant for Horizontal Tab value.
template<typename T >
constexpr bool | restinio::easy_parser::impl::is_producer_v = is_producer<T>::value
| A meta-value to check whether T is a producer type.
template<typename T >
constexpr bool | restinio::easy_parser::impl::is_transformer_v = is_transformer<T>::value
| A meta-value to check whether T is a transformer type.
template<typename T >
constexpr bool | restinio::easy_parser::impl::is_transformer_proxy_v = is_transformer_proxy<T>::value
| A meta-value to check whether T is a transformer-proxy type.
template<typename T >
constexpr bool | restinio::easy_parser::impl::is_consumer_v = is_consumer<T>::value
| A meta-value to check whether T is a consumer type.
template<typename T >
constexpr bool | restinio::easy_parser::impl::is_clause_v = is_clause<T>::value
| A meta-value to check whether T is a consumer type.

## Detailed Description

An very small, simple and somewhat limited implementation of recursive-descent parser.

Since
  v.0.6.1

Definition in file easy_parser.hpp.