csv::CSVField Class Reference

Data type representing individual CSV values. More...

#include <csv_row.hpp>

Public Member Functions
constexpr	CSVField (csv::string_view _sv) noexcept
	Constructs a CSVField from a string_view.
	operator std::string () const
template<typename T = std::string>
T	get ()
	Returns the value casted to the requested type, performing type checking before. More...
bool	try_parse_hex (int &parsedValue)
	Parse a hexadecimal value, returning false if the value is not hex.
bool	try_parse_decimal (long double &dVal, const char decimalSymbol='.')
	Attempts to parse a decimal (or integer) value using the given symbol, returning true if the value is numeric. More...
template<typename T >
CONSTEXPR_14 bool	operator== (T other) const noexcept
	Compares the contents of this field to a numeric value. More...
CONSTEXPR csv::string_view	get_sv () const noexcept
	Return a string view over the field's contents.
CONSTEXPR_14 bool	is_null () noexcept
	Returns true if field is an empty string or string of whitespace characters.
CONSTEXPR_14 bool	is_str () noexcept
	Returns true if field is a non-numeric, non-empty string.
CONSTEXPR_14 bool	is_num () noexcept
	Returns true if field is an integer or float.
CONSTEXPR_14 bool	is_int () noexcept
	Returns true if field is an integer.
CONSTEXPR_14 bool	is_float () noexcept
	Returns true if field is a floating point value.
CONSTEXPR_14 DataType	type () noexcept
	Return the type of the underlying CSV data.
template<>
CONSTEXPR_14 long double	get ()
	Retrieve this field's value as a long double.
template<>
CONSTEXPR bool	operator== (const char *other) const noexcept
	Compares the contents of this field to a string.
template<>
CONSTEXPR bool	operator== (csv::string_view other) const noexcept
	Compares the contents of this field to a string.

Detailed Description

Data type representing individual CSV values.

CSVFields can be obtained by using CSVRow::operator[]

Definition at line 143 of file csv_row.hpp.

Member Function Documentation

get()

template<typename T = std::string>

T csv::CSVField::get ( )

inline

Returns the value casted to the requested type, performing type checking before.

Valid options for T

• std::string or csv::string_view
• signed integral types (signed char, short, int, long int, long long int)
• floating point types (float, double, long double)
• unsigned integers are not supported at this time, but may be in a later release

Invalid conversions

• Converting non-numeric values to any numeric type
• Converting floating point values to integers
• Converting a large integer to a smaller type that will not hold it

Note

This method is capable of parsing scientific E-notation. See this page for more details.

Exceptions

std::runtime_error

Thrown if an invalid conversion is performed.

Warning

Currently, conversions to floating point types are not checked for loss of precision

Any string_views returned are only guaranteed to be valid if the parent CSVRow is still alive. If you are concerned about object lifetimes, then grab a std::string or a numeric value.

Definition at line 180 of file csv_row.hpp.

operator==()

template<typename T >

CONSTEXPR_14 bool csv::CSVField::operator== ( T  other ) const

inlinenoexcept

Compares the contents of this field to a numeric value.

If this field does not contain a numeric value, then all comparisons return false.

Note

Floating point values are considered equal if they are within 0.000001 of each other.

Warning

Multiple numeric comparisons involving the same field can be done more efficiently by calling the CSVField::get<>() method.

See also

csv::CSVField::operator==(const char * other)

csv::CSVField::operator==(csv::string_view other)

Definition at line 242 of file csv_row.hpp.

try_parse_decimal()

bool csv::CSVField::try_parse_decimal	(	long double &	dVal,
		const char	decimalSymbol = '.'
	)

Attempts to parse a decimal (or integer) value using the given symbol, returning true if the value is numeric.

Note

This method also updates this field's type

Definition at line 167 of file csv_row.cpp.

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

• include/internal/csv_row.hpp
• include/internal/csv_row.cpp