accept() [2/3]

template<template< typename U, typename V, typename... Args > class ObjectType = std::map, template< typename U, typename... Args > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = std::int64_t, class NumberUnsignedType = std::uint64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator, template< typename T, typename SFINAE=void > class JSONSerializer = adl_serializer, class BinaryType = std::vector<std::uint8_t>>

template<typename InputType >

static bool nlohmann::basic_json< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType >::accept ( InputType &&  i, const bool  ignore_comments = false  )

inlinestatic

check if the input is valid JSON

Unlike the parse(InputType&&, const parser_callback_t,const bool) function, this function neither throws an exception in case of invalid JSON input (i.e., a parse error) nor creates diagnostic information.

Template Parameters

InputType

A compatible input, for instance an std::istream object a FILE pointer a C-style array of characters a pointer to a null-terminated string of single byte characters an object obj for which begin(obj) and end(obj) produces a valid pair of iterators.

Parameters

[in]	i	input to read from
[in]	ignore_comments	whether comments should be ignored and treated like whitespace (true) or yield a parse error (true); (optional, false by default)

Returns

Whether the input read from i is valid JSON.

@complexity Linear in the length of the input. The parser is a predictive LL(1) parser.

Note

A UTF-8 byte order mark is silently ignored.

@liveexample{The example below demonstrates the accept() function reading from a string.,accept__string}

Definition at line 24697 of file json.hpp.

    {
        return parser(detail::input_adapter(std::forward<InputType>(i)), nullptr, false, ignore_comments).accept(true);
    }