toml_parser.hpp

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#ifndef NEFORCE_CORE_FILE_TOML_TOML_PARSER_HPP__
#define NEFORCE_CORE_FILE_TOML_TOML_PARSER_HPP__

 
#include "NeForce/core/file/toml/toml_value.hpp"
#include "NeForce/core/utility/optional.hpp"
NEFORCE_BEGIN_NAMESPACE__



class NEFORCE_API toml_parser {
private:
    struct context {
        toml_table* table;   
        vector<string> path; 
    };
 
    vector<context> context_stack_;  
    bool is_in_array_table_ = false; 
 
    string text_;       
    size_t len_;        
    size_t pos_ = 0;    
    size_t line_ = 1;   
    size_t column_ = 1; 
 
    unique_ptr<toml_table> root_; 
    toml_table* ctb_ = nullptr;   
    vector<string> ctp_;          

    void skip_whitespace() noexcept;

    void skip_comment() noexcept;

    void skip_whitespace_and_comments() noexcept;

    void skip_newlines() noexcept;

    void skip_whitespace_no_newline() noexcept;

    char current() const noexcept;

    char peek(size_t offset = 1) const noexcept;

    bool eof() const noexcept;

    void advance() noexcept;

    bool expect(char ch);

    bool match(char ch) noexcept;

    void throw_parse_error(string message) const;

    char32_t parse_unicode_escape(size_t digits);

    unique_ptr<toml_string> parse_string();

    unique_ptr<toml_string> parse_basic_string();

    unique_ptr<toml_string> parse_literal_string();

    unique_ptr<toml_string> parse_multiline_basic_string();

    unique_ptr<toml_string> parse_multiline_literal_string();

    unique_ptr<toml_value> parse_number();

    unique_ptr<toml_integer> parse_integer(int base = 10);

    unique_ptr<toml_boolean> parse_boolean();

    unique_ptr<toml_datetime> parse_datetime();

    unique_ptr<toml_array> parse_array();

    unique_ptr<toml_table> parse_inline_table();

    string parse_key();

    string parse_bare_key();

    string parse_quoted_key();

    vector<string> parse_dotted_key();

    unique_ptr<toml_value> parse_value();

    void parse_key_value();

    void parse_table_header();

    void parse_array_table_header();

    toml_table* get_or_create_table(const vector<string>& path) const;

    toml_table* navigate_to_table(const vector<string>& path) const;

    void set_current_table(const vector<string>& path);
 
public:
    explicit toml_parser(string text) noexcept :
    text_(_NEFORCE move(text)),
    len_(text_.size()) {
        root_ = make_unique<toml_table>();
        ctb_ = root_.get();
    }

    unique_ptr<toml_table> parse();

    optional<unique_ptr<toml_table>> try_parse();
};
 // TomlConfig
 // ConfigFormat
 
NEFORCE_END_NAMESPACE__
#endif // NEFORCE_CORE_FILE_TOML_TOML_PARSER_HPP__