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templated input adapters

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This commit is contained in:
Francois Chabot 2020-02-19 10:32:49 -05:00
parent 973c52dd4a
commit 617b3cf42e
7 changed files with 623 additions and 310 deletions
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44
include/nlohmann/detail/input/lexer.hpp
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@ -22,19 +22,9 @@ namespace detail
// lexer //
///////////
/*!
@brief lexical analysis
This class organizes the lexical analysis during JSON deserialization.
*/
template<typename BasicJsonType>
class lexer
class lexer_base
{
using number_integer_t = typename BasicJsonType::number_integer_t;
using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
using number_float_t = typename BasicJsonType::number_float_t;
using string_t = typename BasicJsonType::string_t;
public:
/// token types for the parser
enum class token_type
@ -75,9 +65,9 @@ class lexer
return "null literal";
case token_type::value_string:
return "string literal";
case lexer::token_type::value_unsigned:
case lexer::token_type::value_integer:
case lexer::token_type::value_float:
case token_type::value_unsigned:
case token_type::value_integer:
case token_type::value_float:
return "number literal";
case token_type::begin_array:
return "'['";
@ -103,15 +93,33 @@ class lexer
// LCOV_EXCL_STOP
}
}
};
/*!
@brief lexical analysis
explicit lexer(detail::input_adapter_t&& adapter)
This class organizes the lexical analysis during JSON deserialization.
*/
template<typename BasicJsonType, typename InputAdapterType = input_adapter_protocol>
class lexer : public lexer_base<BasicJsonType>
{
using input_adapter_ptr_t = std::shared_ptr<InputAdapterType>;
using number_integer_t = typename BasicJsonType::number_integer_t;
using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
using number_float_t = typename BasicJsonType::number_float_t;
using string_t = typename BasicJsonType::string_t;
public:
using token_type = typename lexer_base<BasicJsonType>::token_type;
explicit lexer(input_adapter_ptr_t&& adapter)
: ia(std::move(adapter)), decimal_point_char(get_decimal_point()) {}
// delete because of pointer members
lexer(const lexer&) = delete;
lexer(lexer&&) = delete;
lexer(lexer&&) = default;
lexer& operator=(lexer&) = delete;
lexer& operator=(lexer&&) = delete;
lexer& operator=(lexer&&) = default;
~lexer() = default;
private:
@ -1480,7 +1488,7 @@ scan_number_done:
private:
/// input adapter
detail::input_adapter_t ia = nullptr;
input_adapter_ptr_t ia = nullptr;
/// the current character
std::char_traits<char>::int_type current = std::char_traits<char>::eof();