Tokenizer Error

Represent a possible tokenizer error result, including parsing context

Context

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#include <xo/tokenizer/tokenizer_error.hpp>

Class

template<typename CharT> class tokenizer_error

represent a lexing error, with context

Template Parameters:: CharT – representation for single characters

Instance Variables

group Tokenizer-error-vars

Variables

char const *src_function_ = nullptr: source location (in tokenizer) at which error identified

std::string error_description_: static error description

input_state_type input_state_: input state associated with this error. Sufficient to precisely locate it with context.

size_t error_pos_ = 0: position (relative to tk_entry_) of error

Constructors

group Tokenizer-error-ctors

Functions

tokenizer_error() = default: Default ctor represents a not-an-error sentinel object

inline tokenizer_error(const char *src_function, std::string error_description, const input_state_type &input_state, size_t error_pos): Constructor to capture parsing error context tk_start current position on entry to scanner error_pos error location relative to token start

Access Methods

group Tokenizer-error-access-methods

Functions

inline const char *src_function() const

inline const std::string &error_description() const

inline const input_state_type &input_state() const

inline size_t tk_start() const

inline size_t whitespace() const

inline size_t error_pos() const

General Methods

group Tokenizer-error-general-methods

Functions

inline bool is_error() const: true, except for a sentinel error object

inline bool is_not_an_error() const: false except for object in sentinel state

void print(std::ostream &os) const: Print representation to stream os. Intended for tokenizer diagnostics. For Schematika errors prefer report

void report(std::ostream &os) const: Print human-oriented error report on os.