Mojo package

string

The string package provides comprehensive Unicode string handling functionality for Mojo.

This package implements Unicode-aware string types and operations, with UTF-8 support. It includes efficient implementations for string manipulation, formatting, and Unicode operations while maintaining memory safety and performance.

Key Components:

String: The main string type supporting UTF-8 encoded text,
StringSlice: Memory-efficient string view type for zero-copy operations
Codepoint: Unicode code point handling and operations
Format: String formatting and interpolation utilities

Core Features:

Unicode support with UTF-8 encoding
Efficient string slicing and views
String formatting and interpolation
Memory-safe string operations
Unicode case conversion
Unicode property lookups and validation

Example:

    # Basic string creation and manipulation
    var s = "Hello, 世界" # runtime type is `String`
    var slice = s[0:5] # "Hello"

    # Unicode-aware operations
    for c in s.codepoints():
        print(c.to_uppercase())

    # String formatting
    var name = "Mojo"
    var formatted = "Hello, {name}!"

Note:

String stores data using UTF-8, and all operations (unless clearly noted) are intended to be fully Unicode compliant and maintain correct UTF-8 encoded data. A handful of operations are known to not be Unicode / UTF-8 compliant yet, but will be fixed as time permits.

Modules

codepoint: Unicode codepoint handling.
format: String formatting utilities for Mojo.
string: The core String type implementation for Mojo.
string_slice: The StringSlice type implementation for efficient string operations.

Modules​

Modules