Thrown when no rule matches at a position (a lexical error). More...

#include <lexer.hpp>

Inheritance diagram for scilex::lex_error:

Collaboration diagram for scilex::lex_error:

Public Member Functions
	lex_error (const std::string &message, position where)
	Builds the error.

	lex_error (const std::string &message, position where, std::vector< token > decided)
	Builds the error a stream raises after deciding tokens in the same call.

position	where () const noexcept
	Returns the position of the unmatched byte.

const std::vector< token > &	decided () const noexcept
	The tokens a token_stream call decided before the error, in order: with the tokens its earlier calls returned, every token before the error, wherever the text was cut. Empty from lexer::tokenize.

Detailed Description

Thrown when no rule matches at a position (a lexical error).

Carries the position of the offending byte so a caller can report it.

Constructor & Destructor Documentation

◆ lex_error() [1/2]

scilex::lex_error::lex_error	(	const std::string &	message,
		position	where
	)

inline

Builds the error.

Parameters

[in]	message	Human-readable cause.
[in]	where	Position of the byte that no rule could match.

◆ lex_error() [2/2]

scilex::lex_error::lex_error	(	const std::string &	message,
		position	where,
		std::vector< token >	decided
	)

inline

Builds the error a stream raises after deciding tokens in the same call.

Parameters

[in]	message	Human-readable cause.
[in]	where	Position of the byte that no rule could match.
[in]	decided	The tokens the call decided before it, in order.

Member Function Documentation

◆ decided()

const std::vector< token > & scilex::lex_error::decided ( ) const

inlinenoexcept

The tokens a token_stream call decided before the error, in order: with the tokens its earlier calls returned, every token before the error, wherever the text was cut. Empty from lexer::tokenize.

Returns: The tokens; a lexeme views the stream's buffer, valid until its next call.

◆ where()

position scilex::lex_error::where ( ) const