Reference

phil/qr-code

Every public type of the package, with its role.

Type	Role
`QrCode`	A symbol: `encode()`, `fromSegments()`, `size()`, `isDark()`, `rows()`, and how it was built.
`Segment`	A run of the data in one mode, or an ECI header.
`Mode`	The numeric, alphanumeric, byte and kanji modes, and the ECI header.
`ErrorCorrection`	The four levels of error correction, `L`, `M`, `Q` and `H`.
`Zone`	The square a code keeps at its centre for a logo.
`Logo`	A PNG, JPEG, WebP or SVG image to draw in the zone.
`SvgWriter`	Draws a `QrCode` as an SVG image.
`PngWriter`	Draws a `QrCode` as a PNG image.
`Contract\Content`	What a typed content gives: its payload and its label.
`Content\Url`, `Email`, `Phone`, `Sms`, `Geo`	Addresses to open, write to, call, text, or a place.
`Content\Wifi`, `WifiSecurity`	A network to join, and its protection.
`Content\MeCard`, `VCard`, `VCardVersion`, `PostalAddress`	A contact, in the compact MeCard form or as a vCard.
`Content\Event`	An event to add to a calendar.
`Exception\QrCodeException`	Implemented by every exception of the package.
`Exception\DataTooLong`	The data does not fit in version 40 at the level asked.
`Exception\InvalidOption`	A version, mask, zone, segment, quiet zone, colour, scale, size or logo out of its range.
`Exception\InvalidContent`	A field of a typed content that cannot be written.