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Package terminal provides support functions for dealing with terminals, as commonly found on UNIX systems.

Package context defines the Context type, which carries deadlines, cancelation signals, and other request-scoped values across API boundaries and between processes.

Package ctxhttp provides helper functions for performing context-aware HTTP requests.

Package http2 implements the HTTP/2 protocol.

Package hpack implements HPACK, a compression format for efficiently representing HTTP header fields in the context of HTTP/2.

Package idna implements IDNA2008 (Internationalized Domain Names for Applications), defined in RFC 5890, RFC 5891, RFC 5892, RFC 5893 and RFC 5894.

Package httplex contains rules around lexical matters of various HTTP-related specifications.

Package google provides support for making OAuth2 authorized and authenticated HTTP requests to Google APIs.

Package jws provides a partial implementation of JSON Web Signature encoding and decoding.

Package jwt implements the OAuth 2.0 JSON Web Token flow, commonly known as "two-legged OAuth 2.0".

Package unix contains an interface to the low-level operating system primitives.

Package cases provides general and language-specific case mappers.

Package language implements BCP 47 language tags and related functionality.

Package runes provide transforms for UTF-8 encoded text.

Package bidirule implements the Bidi Rule defined by RFC 5893.

Package precis contains types and functions for the preparation, enforcement, and comparison of internationalized strings ("PRECIS") as defined in RFC 7564.

Package transform provides reader and writer wrappers that transform the bytes passing through as well as various transformations.

Package bidi contains functionality for bidirectional text support.

Package norm contains types and functions for normalizing Unicode strings.

Package width provides functionality for handling different widths in text.