fmtlib/fmt
Fmt
fmt is a type-safe C++ text formatting library used to convert data into formatted strings and text. It serves as a high-performance string buffer utility and provided the basis for the formatting features introduced in the C++20 standard.
The library shifts format string validation and size computation to the compilation phase to prevent runtime crashes and increase execution speed. It utilizes a memory-efficient interface to write formatted data directly into buffers, minimizing allocations and eliminating intermediate string overhead.
The project covers a broad range of text processing capabilities, including the serialization of containers, floating-point numbers, and temporal data. It includes utilities for ANSI console text styling and supports custom type formatting through a standardized extension interface.
The library can be imported as a C++20 module using native build targets.
Features
- Compile-Time Format Validators - Analyzes format strings during compilation to ensure specifiers match the provided argument types before execution.
- Text Formatting - Provides a type-safe text formatting system using positional arguments and specifiers for general variable conversion.
- Custom Type Converters - Provides a standardized extension interface to support user-defined types in the formatting system.
- Format String Validators - Checks format specifiers against argument types during compilation to prevent runtime crashes caused by mismatched data types.
- Formatted Output Buffers - Provides a memory-efficient interface to write formatted data directly into buffers to eliminate intermediate string allocations.
- Formatted String Buffers - Provides a memory-efficient interface for writing formatted data directly into buffers to minimize allocations.
- String Formatting Utilities - Provides a type-safe API and generic dispatch for formatting C strings into memory buffers.
- C++ Text Formatting Libraries - Converts variables and complex data types into human-readable strings using a type-safe and performant API.
- Standard Library Extensions - Serves as the basis for the std::format feature introduced in the C++20 standard.
- Standard Library Type Formatting - Provides built-in formatting rules for C++ standard types including durations, time points, and filesystem paths.
- User-Defined Type Formatters - Allows user-defined types to be formatted by specializing a standard formatter template.
- Buffered Input Output Managers - Implements high-performance buffered output to optimize write operations and prevent buffer overflows.
- Output Stream Managers - Writes data directly into stream buffers to eliminate intermediate memory allocations and maximize output speed.
- Datetime String Formatting - Renders temporal data and datetime objects into human-readable strings using customizable formats.
- Collection Serialization - Serializes collections and containers into a readable string representation.
- Terminal Output Stylers - Adds colors and visual emphasis to terminal output using standardized style objects.
- High-Performance Console Output - Writes styled text and data to streams or consoles while minimizing memory allocations and avoiding buffer overflows.
- Compile-Time Formatting - Validates format strings and computes output sizes during compilation to prevent runtime errors and increase speed.
- Positional Argument Mapping - Resolves variables in a format string using numeric indices to support localized text reordering.
- Generic Dispatch Mechanisms - Uses template metaprogramming to resolve the correct formatting function for a given type without runtime overhead.
- Floating-Point String Conversion - Converts floating-point numbers to strings with guaranteed correctness and precise rounding.
- Constant-Expression Parsing - Evaluates format string syntax at compile time to reduce the processing required during program execution.
- Console Markup Support - Supports styled terminal output using ANSI colors and text markup for console and file printing.
- Text Styling Utilities - Applies visual styles and emphasis to output using dedicated style objects for terminal-based decoration.
- Date and Time Formatting - Renders dates, times, and durations into customizable human-readable strings with guaranteed correctness.
- Data Formatting - Modern and efficient formatting library.
- Developer Tools - Modern C++ formatting library.
- Developer Tools and Utilities - Modern, fast formatting library.
- Formatting and Logging - Modern, fast, and safe formatting library.
- General Utilities - Safe and fast formatting library for C++.
