CSVLexer Class Reference

The lexer class divides a text stream into tokens. More...

#include <csvreader.hh>

Inheritance diagram for CSVLexer:

Collaboration diagram for CSVLexer:

Classes
struct	State
	Current state of lexer. More...
struct	Token
	The token. More...

Public Member Functions
	CSVLexer (QTextStream &stream, QObject *parent=nullptr)
	Constructs a lexer for the given stream.
void	push ()
	Saves the current lexer state.
void	pop ()
	Restores the last lexer state.
Token	next ()
	Reads the next token from the stream.
const QString &	errorMessage () const
	Returns the last error message.

Protected Member Functions
Token	lex ()
	Internal used function to get the next token.

Protected Attributes
QString	_errorMessage
	The error message.
QTextStream &	_stream
	The text stream to read from.
QVector< State >	_stack
	The stack of saved lexer states.
QString	_currentLine
	The current line count.

Static Protected Attributes
static QVector< QPair< QRegularExpression, Token::TokenType > >	_pattern
	The list of patterns to match.

Detailed Description

The lexer class divides a text stream into tokens.

Member Function Documentation

lex()

CSVLexer::Token CSVLexer::lex ( )

protected

Internal used function to get the next token.

Also returns ignored tokens like whitespace and comment.

Member Data Documentation

_pattern

QVector< QPair< QRegularExpression, CSVLexer::Token::TokenType > > CSVLexer::_pattern

staticprotected

Initial value:

= {
  { QRegularExpression("^n([0-9]{3})"),                     CSVLexer::Token::T_DCS_N },
  { QRegularExpression("^i([0-9]{3})"),                     CSVLexer::Token::T_DCS_I },
  { QRegularExpression("^([a-zA-Z0-9]{1,6}-[0-9]{1,2})"),   CSVLexer::Token::T_APRSCALL },
  { QRegularExpression("^([a-zA-Z_][a-zA-Z0-9_]*)"),        CSVLexer::Token::T_KEYWORD },
  { QRegularExpression("^\"([^\"\r\n]*)\""),                CSVLexer::Token::T_STRING },
  { QRegularExpression("^([+-]?[0-9]+(\\.[0-9]*)?)"),       CSVLexer::Token::T_NUMBER },
  { QRegularExpression("^(:)"),                             CSVLexer::Token::T_COLON },
  { QRegularExpression("^(-)"),                             CSVLexer::Token::T_NOT_SET },
  { QRegularExpression("^(\\+)"),                           CSVLexer::Token::T_ENABLED },
  { QRegularExpression("^(,)"),                             CSVLexer::Token::T_COMMA },
  { QRegularExpression("^([ \t]+)"),                        CSVLexer::Token::T_WHITESPACE },
  { QRegularExpression("^(\r?\n)"),                         CSVLexer::Token::T_NEWLINE},
  { QRegularExpression("^(#[^\n\r]*)"),                     CSVLexer::Token::T_COMMENT},
}

The list of patterns to match.

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The documentation for this class was generated from the following files:

• /home/hannes/Software/qdmr/lib/csvreader.hh
• /home/hannes/Software/qdmr/lib/csvreader.cc