donner::parser::ParserBase Class Reference

Base class for parsers, containing common functionality such as maintaining the current parse location, skipping whitespace, and parsing numbers. More...

#include "donner/base/parser/details/ParserBase.h"

Inheritance diagram for donner::parser::ParserBase:

Collaboration diagram for donner::parser::ParserBase:

Public Member Functions
	ParserBase (std::string_view str)
	Create a new parser.

Protected Member Functions
std::string_view	take (size_t count)
	Removes and returns count characters from the remaining string.
void	skipWhitespace ()
	Remove whitespace characters, from the front of remaining_ if they exist, where whitespace is based on the result of isWhitespace().
void	skipCommaWhitespace ()
	Remove whitespace characters and up to one ',' character from the front of remaining_ if they exist.
bool	isWhitespace (char ch) const
	Returns if the character is whitespace, where whitespace is defined as being either U+000A LINE FEED, U+000D CARRIAGE RETURN, U+0009 CHARACTER TABULATION, or U+0020 SPACE.
FileOffset	currentOffset (int index=0) const
	Return the location of the parser's cursor, in characters from the start of the screen.
size_t	consumedChars () const
	Returns the number of characters consumed by the parser.
ParseResult< double >	readNumber ()
	Read a number, note that this does not skip whitespace.
std::optional< ParseError >	readNumbers (std::span< double > resultStorage)
	Read resultStorage.size() numbers, separated by whitespace and an optional comma.

Protected Attributes
const std::string_view	str_
	The original string.
std::string_view	remaining_
	A slice of the remaining characters to parse within str_.

Detailed Description

Base class for parsers, containing common functionality such as maintaining the current parse location, skipping whitespace, and parsing numbers.

Constructor & Destructor Documentation

ParserBase()

donner::parser::ParserBase::ParserBase ( std::string_view str )

explicit

Create a new parser.

Parameters

str	String to parse.

Member Function Documentation

currentOffset()

FileOffset donner::parser::ParserBase::currentOffset ( int index = 0 ) const

protected

Return the location of the parser's cursor, in characters from the start of the screen.

Parameters

index

Index of the offset relative to the cursor to return, default is 0.

isWhitespace()

bool donner::parser::ParserBase::isWhitespace ( char ch ) const

protected

Returns if the character is whitespace, where whitespace is defined as being either U+000A LINE FEED, U+000D CARRIAGE RETURN, U+0009 CHARACTER TABULATION, or U+0020 SPACE.

Parameters

ch	Character to test.

readNumbers()

std::optional< ParseError > donner::parser::ParserBase::readNumbers ( std::span< double > resultStorage )

protected

Read resultStorage.size() numbers, separated by whitespace and an optional comma.

Parameters

resultStorage

Location where the numbers will be stored, the number of parameters is based on the size of the span.

take()

std::string_view donner::parser::ParserBase::take ( size_t count )

protected

Removes and returns count characters from the remaining string.

Parameters

count

Number of characters to return, this must be less than remaining_.size()

Returns

std::string_view Returned string.

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

• donner/base/parser/details/ParserBase.h
• donner/base/parser/details/ParserBase.cc