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Standard library

Author: Chris M. Pérez Santiago
Version: 0.1.0
Source: Edit this page on GitHub

The standard library ships with the compiler. Every module lives under Std, nothing is imported implicitly, and a program imports exactly what it uses. This page is a map; the API reference documents every public declaration.

Core values

Module	For
Std.Option	working with values that may be absent
Std.Result	working with work that may fail
Std.Text	text: searching, splitting, numbers from text
Std.Char	single characters
Std.Math	numeric functions
Std.Decimal	exact decimal arithmetic and rounding
Std.Fmt	formatting values as text

Collections

Module	For
Std.List	operations on arrays: sorting, grouping, searching
Std.Map	ordered maps
Std.Set	ordered sets
Std.Iter	sequences a `for` loop can walk
Std.Deque, Std.Heap	queues and priority queues

Input, output, and the system

Module	For
Std.Io	standard input and output, files, streaming readers
Std.Fs	atomic writes, temporary files, permissions, metadata
Std.Path	building and taking apart file paths
Std.Env	arguments, environment variables, the clock
Std.Process	starting other programs and talking to them
Std.Time	dates, times, and durations

Data formats

Module	For
Std.Json	JSON documents and JSON Lines
Std.Csv	CSV, read one record at a time
Std.Toml, Std.Yaml, Std.Xml	configuration and document formats
Std.Regex	regular expressions with a step limit
Std.Bytes	binary data, hex, and base64

Networking and the web

Module	For
Std.Http.Server	an HTTP server with routing, limits, and graceful shutdown
Std.Http.Client	an HTTP client with verified TLS, redirects, and deadlines
Std.Html	HTML built as values, escaped by construction
Std.Url	parsing and building URLs
Std.Net, Std.Tls	sockets and verified TLS connections

Applications and databases

Module	For
Std.App	an application as a value: settings, stages, health checks
Std.App.Database	a database resource for SQLite or PostgreSQL
Std.Db.Migrate	numbered schema migrations that run once
Std.Db.Store	keeping a program's own values in a table
Std.Crypto	hashes, message authentication, and encryption

Testing

Module	For
Std.Test	test suites that `pudu test` discovers and runs
Std.Bench	measuring how long code takes

Reading the reference

Every declaration in the API reference shows its signature and its documentation. You can also search by type shape from the home page: searching Str -> UInt32 finds functions that take text and return a 32-bit number.