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MIT License
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# impl Rust on ESP32
In this book, we use the ESP32 DevKit V1 and program it in Rust to explore various exciting projects.
## Prerequisites
If you haven't already read the ["The Rust on ESP Book"](https://docs.esp-rs.org/book/introduction.html), I highly recommend doing so first. While this book will cover some aspects of setting up the development environment and basic concepts, it will not go into as much detail to avoid unnecessary repetition, as these topics are already thoroughly explained in the official book.
## Meet the Hardware
We will be using one of the development board "ESP32 DevKit V1", which comes with built-in Wi-Fi and Bluetooth capabilities, along with an integrated RF module
<a href ="./src/images/esp32-devkitv1.jpg"><img style="display: block; margin: auto;width:300px;" src="./src/images/esp32-devkitv1.jpg"/></a>
## Datasheets
For detailed technical information, specifications, and guidelines, refer to the official datasheets:
- [ESP32 Datasheet](https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf)
- [Technical Reference Manual](https://www.espressif.com/sites/default/files/documentation/esp32_technical_reference_manual_en.pdf#ledpwm)
## License
The impl Rust on ESP32 book(this project) is distributed under the following licenses:
* The code samples and free-standing Cargo projects contained within this book are licensed under the terms of both the [MIT License] and the [Apache License v2.0].
* The written prose contained within this book is licensed under the terms of the Creative Commons [CC-BY-SA v4.0] license.
[MIT License]: ./LICENSE-MIT
[Apache License v2.0]: ./LICENSE-APACHE
[CC-BY-SA v4.0]: ./LICENSE-CC-BY-SA
[MIT License Hosted]: https://opensource.org/licenses/MIT
[Apache License v2.0 Hosted]: http://www.apache.org/licenses/LICENSE-2.0
[CC-BY-SA v4.0 Hosted]: https://creativecommons.org/licenses/by-sa/4.0/legalcode
## Support this project
You can support this book by starring this project on [GitHub](https://github.com/ImplFerris/esp-book) or sharing this book with others 😊
### Disclaimer:
The experiments and projects shared in this book have worked for me, but results may vary. I'm not responsible for any issues or damage that may occur while you're experimenting. Please proceed with caution and take necessary safety precautions.

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[book]
title = "impl Rust on ESP32"
authors = []
language = "en"
multilingual = false
src = "src"
[output.html]
git-repository-url = "https://github.com/ImplFerris/esp32-book"
cname = "esp.implrust.com"
preferred-dark-theme = "ayu"
preferred-light-theme = "rust"
default-theme = "light"
mathjax-support = true
# [output.html.playground]
# editable = true

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# Summary
- [Introduction](./index.md)
- [ESP32 Family](./esp32-family.md)
- [Dev Environment](./dev-env.md)
- [Quick Start](./quick-start.md)
- [Async and Embassy](./embassy.md)
- [Pinout Diagram](./pinout.md)
<!-- - [Dimming LED](./dimming-led/index.md) -->

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# Project Template with `cargo-generate`
"cargo-generate is a developer tool to help you get up and running quickly with a new Rust project by leveraging a pre-existing git repository as a template."
Read more about [here](https://github.com/cargo-generate/cargo-generate).
## Prerequisites
Before starting, ensure you have the following tools installed:
- [Rust](https://www.rust-lang.org/tools/install)
- [cargo-generate](https://github.com/cargo-generate/cargo-generate) for generating the project template.
You can install `cargo-generate` using the following command:
```sh
cargo install cargo-generate
```
## Template by ESP-RS
We will be using the templates provided by [ESP-RS](https://docs.esp-rs.org/book/writing-your-own-application/generate-project/index.html#esp-generate), which offer two sets:
- **esp-generate**: A `no_std` template. This is the one we will focus on most of the time.
- **esp-idf-template**: A `std` template.
## esp-generate
The **esp-generate** tool is used for creating `no_std` applications. Currently, it supports the ESP32, ESP32-C2/C3/C6, ESP32-H2, and ESP32-S2/S3.
```sh
cargo install esp-generate
```
### Creating project with `esp-generate`
For this book, we will be using the ESP32. I highly recommend using the same hardware to make it easier to follow along.
```sh
# Replace PROJECT_NAME and --chip with your specific chip and project name.
esp-generate --chip esp32 PROJECT_NAME
```

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# Development Environment
The [official docs](https://docs.esp-rs.org/book/installation/index.html) provides more comprehensive setup instructions. However, I will quickly cover the essential tools and setup needed for our exercises. If you encounter any issues, refer to the official documentation for troubleshooting.
## cargo-binstall
This is to install Rust binaries without building from source using cargo install or manually downloading packages, you can use cargo-binstall. We'll use this tool to install the espflash tool next.
```rust
cargo install cargo-binstall
```
## espflash
"espflash is a serial flasher utility, based on esptool.py, for Espressif SoCs and modules." This will be the tool used (when we are not using probe-rs) to put our code into the device and run it.
```rust
cargo binstall espflash
```
After installation, type the espflash command to verify that it works.

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# Dimming LED
In this exercise, we'll dim an external LED using Pulse Width Modulation (PWM), which will be explained in the next chapter. Essentially, we control the LED's brightness by adjusting the duty cycle (explained in the PWM section), which varies at regular intervals to create a dimming effect.
## Hardware Requirements
- LED
- Resistor (330 Ohms)
- Jumper wires
- Breadboard (optional)
## Circuit
//TODO

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## Async
Async programming is a type of concurrent programming that allows tasks to run concurrently without blocking each other. In embedded systems, it enables microcontrollers to handle multiple tasks, such as reading sensors or controlling other peripherals without waiting for each task to finish. You can read the "[Asynchronous Programming in Rust](https://rust-lang.github.io/async-book/intro.html)" for more details.
## Embassy
[Embassy](https://github.com/embassy-rs/embassy) is a powerful framework for building safe, efficient, and asynchronous embedded applications in Rust. You can use it with ESP32, Pico and other microcontrollers.
Let's re-setup the same blinky project but with embassy support.
### Setup project
To start the project, use the `esp-generate` command. Run the following:
```sh
esp-generate --chip esp32 blinky-embassy
```
This will open a screen asking you to select options. But, this time we select "Adds `embassy` framework support" and save it to generate the project template with support of embassy.
If you notice, the main function is now marked as async, along with a few other changes in the code. However, the core logic for blinking the LED remains the same.
## The Full code
```rust
#![no_std]
#![no_main]
use embassy_executor::Spawner;
use embassy_time::Timer;
use esp_backtrace as _;
use esp_hal::{
gpio::{Io, Level, Output},
prelude::*,
};
use log::info;
#[main]
async fn main(_spawner: Spawner) {
let peripherals = esp_hal::init({
let mut config = esp_hal::Config::default();
config.cpu_clock = CpuClock::max();
config
});
esp_println::logger::init_logger_from_env();
let timg0 = esp_hal::timer::timg::TimerGroup::new(peripherals.TIMG0);
esp_hal_embassy::init(timg0.timer0);
info!("Embassy initialized!");
let io = Io::new(peripherals.GPIO, peripherals.IO_MUX);
let mut led = Output::new(io.pins.gpio2, Level::High);
loop {
led.set_high();
Timer::after_millis(500).await;
led.set_low();
Timer::after_millis(500).await;
}
}
```
## Reference
- [The Embedded Rust Book](https://docs.rust-embedded.org/book/intro/index.html)

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# ESP32 Variants
If you're new and searching for what ESP32 to buy, you might feel overwhelmed by the many choices and variants. In this section, we'll explore these variants and help you decide which one to choose.
## Brief on ESP32 Family
The ESP32 family, a series of low cost and low power System on a Chip (SoC) microcontrollers created by Espressif. ESP32 is the successor to the ESP8266 and has since expanded with various new variants.
## Which one to choose?
There are several variants in the ESP32 family.
- ESP32
- ESP32 S Series(ESP32-S2, ESP32-S3)
- ESP32 C Series(ESP32-C3, ESP32-C6, ESP32-C5)
- ESP32 H Series(ESP32-H2)
- ESP32-P Series(ESP32-P4)
If you are choosing for a specific project or building a product, use the product comparison tables above to find the one best fit for your needs. You can find a full list of these models and their specs on the Espressif [Product Comparison page](https://products.espressif.com/#/product-comparison).
For a simple overview of the most common ESP32 models and their main features, check out [this table](https://done.land/components/microcontroller/families/esp/esp32/) on Done.land website.
## Why ESP32 DevKit v1?
**Confession time:** I wasn't aware of the many variants available when I first wanted to try out the ESP32. I searched on an e-commerce website, and most of the results showed ESP32-WROOM-32 with different vendor names. I just went with one of them. Later, I discovered there are other variants. However, at the time of writing this, most of them are either not easily accessible where I live or more expensive than this variant. This remains one of the popular choices for now.
So for this book, we'll keep it simple and choose the popular and affordable one "**ESP32 DevKit V1**" , perfect for development and learning.
## How to find?
If you search on an e-commerce website, you'll most likely find it listed under a name like "ESP32 Development Board (ESP-WROOM-32)" which should have WiFi Bluetooth Dual Core (30 PIN) in specs.
You can compare the specifications and board pins with this.
<a href ="./images/esp32-devkitv1.jpg"><img style="display: block; margin: auto;width:300px;" src="./images/esp32-devkitv1.jpg"/></a>
### Specs
The ESP32 is a dual-core 32-bit processor equipped with Wi-Fi and Bluetooth, perfect for creating wireless IoT applications.
The following are basic specs for the ESP32:
- Processor: Xtensa 32-bit LX6
- Number of Cores: 2
- Clock Frequency: 240MHz
- Flash Memory: 4 MB
- ROM: 448 KB (read-only programs essential for the operation of the ESP32)
- SRAM: 520 KB (to store data and instructions)
- ADC: 12-bit SAR ADC, 18 channels, 6 Input Pins
- UARTs: 3
- SPIs: 2
- I2Cs: 3
- Wi-Fi: IEEE 802.11 b/g/n/e/i (802.11n up to 150 Mbps)
- Bluetooth: v4.2 BR/EDR and Bluetooth Low Energy (BLE)
- Operation Voltage: 2.3-3.6V
- Deep Sleep: 100uA
## Reference
- [Buyers Guide](https://eitherway.io/posts/esp32-buyers-guide/)
- [Chip Series Comparison](https://docs.espressif.com/projects/esp-idf/en/v5.0/esp32s3/hw-reference/chip-series-comparison.html)
- [ESP32 Guide 2024 Video](https://www.youtube.com/watch?v=u5unB24lhC4)

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# Intro
In this book, we use the ESP32 and program it in Rust to explore various exciting projects.
## Prerequisites
If you haven't already read the ["The Rust on ESP Book"](https://docs.esp-rs.org/book/introduction.html), I highly recommend doing so first. While this book will cover some aspects of setting up the development environment and basic concepts, it will not go into as much detail to avoid unnecessary repetition, as these topics are already thoroughly explained in the official book.
## Meet the Hardware
We will be using one of the development board "ESP32 DevKit V1", which comes with built-in Wi-Fi and Bluetooth capabilities, along with an integrated RF module
<a href ="./images/esp32-devkitv1.jpg"><img style="display: block; margin: auto;width:300px;" src="./images/esp32-devkitv1.jpg"/></a>
## Datasheets
For detailed technical information, specifications, and guidelines, refer to the official datasheets:
- [ESP32 Datasheet](https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf)
- [Technical Reference Manual](https://www.espressif.com/sites/default/files/documentation/esp32_technical_reference_manual_en.pdf)
- [ESP32-WROOM-32 Datasheet](https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32_datasheet_en.pdf)
## License
The impl Rust on ESP32 book(this project) is distributed under the following licenses:
* The code samples and free-standing Cargo projects contained within this book are licensed under the terms of both the [MIT License] and the [Apache License v2.0].
* The written prose contained within this book is licensed under the terms of the Creative Commons [CC-BY-SA v4.0] license.
[MIT License]: https://opensource.org/licenses/MIT
[Apache License v2.0]: http://www.apache.org/licenses/LICENSE-2.0
[CC-BY-SA v4.0]: https://creativecommons.org/licenses/by-sa/4.0/legalcode
## Support this project
You can support this book by starring this project on [GitHub](https://github.com/ImplFerris/esp-book) or sharing this book with others 😊
### Disclaimer:
The experiments and projects shared in this book have worked for me, but results may vary. I'm not responsible for any issues or damage that may occur while you're experimenting. Please proceed with caution and take necessary safety precautions.

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# ESP32 Pinout
[![ESP32 DevKit V1 pinout diagram](./images/ESP32-DevKit-V1-Pinout-Diagram.png)](./images/ESP32-DevKit-V1-Pinout-Diagram.png)
Credit: [CC-BY-SA 4.0](https://www.circuitstate.com/pinouts/doit-esp32-devkit-v1-wifi-development-board-pinout-diagram-and-reference/)
The above pinout diagram is created by the CircuitState website. They have provided detailed explanations for each pin. You can check it out [here](https://www.circuitstate.com/pinouts/doit-esp32-devkit-v1-wifi-development-board-pinout-diagram-and-reference/).
Disclaimer: This book is not affiliated with nor associated with CircuitState. I am including this diagram as i found it helpful during my research.

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# Quick Start
Before diving into the theory and concepts of how everything works, let's jump straight into action. Use this simple code to turn on the onboard LED of the ESP32 DevKit.
## Blink LED with ESP HAL
[ESP HAL](https://github.com/esp-rs/esp-hal) is "no_std Hardware Abstraction Layers for ESP32 microcontrollers"
### Setup project
To start the project, use the `esp-generate` command. Run the following:
```sh
esp-generate --chip esp32 blinky
```
This will open a screen asking you to select options. For now, we dont need to select any options. Just save it by pressing "s" in the keyboard.
Next, navigate to the project folder:
```sh
cd blinky
```
Open the src/bin/main.rs file. It will contain a simple "Hello, World" code. We will modify this code to blink an LED on the board.
## Blinking Code
This code creates a blinking effect by toggling an LED connected to a GPIO pin between high and low states.
#### Import Required Module
Additional import we need to set the LED as output pin
```rust
use esp_hal::gpio::{Io, Level, Output};
```
#### Initialize ESP HAL and Delay
Set up the ESP HAL and configure a delay
```rust
let peripherals = esp_hal::init(esp_hal::Config::default());
let delay = Delay::new();
```
Then lets set the LED GPIO pin "GPIO2" as an output pin with an initial state "High"(LED is turned on):
```rust
let io = Io::new(peripherals.GPIO, peripherals.IO_MUX);
let mut led = Output::new(io.pins.gpio2, Level::High);
```
#### Blinking Loop
Create a loop to toggle the LED state(between High and Low).
```rust
loop {
led.toggle();
delay.delay_millis(500);
led.toggle();
delay.delay_millis(500);
}
```
## The full code
```rust
#![no_std]
#![no_main]
use esp_hal::delay::Delay;
use esp_hal::prelude::*;
use {esp_backtrace as _};
use esp_hal::gpio::{Io, Level, Output};
#[entry]
fn main() -> ! {
#[allow(unused)]
let peripherals = esp_hal::init(esp_hal::Config::default());
let delay = Delay::new();
let io = Io::new(peripherals.GPIO, peripherals.IO_MUX);
let mut led = Output::new(io.pins.gpio2, Level::High);
loop {
led.toggle();
delay.delay_millis(500);
led.toggle();
delay.delay_millis(500);
}
}
```
## Flash - `Run Rust Run`
All that's left is to flash the code onto our device and watch it go! The onboard LED should start blinking.
Run the following command from your project folder:
```rust
cargo run
```
To run in release mode
```rust
cargo run --release
```

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position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
}
[dir=rtl] .sidebar { left: unset; right: 0; }
.sidebar-resizing {
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
user-select: none;
}
html:not(.sidebar-resizing) .sidebar {
transition: transform 0.3s; /* Animation: slide away */
}
.sidebar code {
line-height: 2em;
}
.sidebar .sidebar-scrollbox {
overflow-y: auto;
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
padding: 10px 10px;
}
.sidebar .sidebar-resize-handle {
position: absolute;
cursor: col-resize;
width: 0;
right: calc(var(--sidebar-resize-indicator-width) * -1);
top: 0;
bottom: 0;
display: flex;
align-items: center;
}
.sidebar-resize-handle .sidebar-resize-indicator {
width: 100%;
height: 12px;
background-color: var(--icons);
margin-inline-start: var(--sidebar-resize-indicator-space);
}
[dir=rtl] .sidebar .sidebar-resize-handle {
left: calc(var(--sidebar-resize-indicator-width) * -1);
right: unset;
}
.js .sidebar .sidebar-resize-handle {
cursor: col-resize;
width: calc(var(--sidebar-resize-indicator-width) - var(--sidebar-resize-indicator-space));
}
/* sidebar-hidden */
#sidebar-toggle-anchor:not(:checked) ~ .sidebar {
transform: translateX(calc(0px - var(--sidebar-width) - var(--sidebar-resize-indicator-width)));
z-index: -1;
}
[dir=rtl] #sidebar-toggle-anchor:not(:checked) ~ .sidebar {
transform: translateX(calc(var(--sidebar-width) + var(--sidebar-resize-indicator-width)));
}
.sidebar::-webkit-scrollbar {
background: var(--sidebar-bg);
}
.sidebar::-webkit-scrollbar-thumb {
background: var(--scrollbar);
}
/* sidebar-visible */
#sidebar-toggle-anchor:checked ~ .page-wrapper {
transform: translateX(calc(var(--sidebar-width) + var(--sidebar-resize-indicator-width)));
}
[dir=rtl] #sidebar-toggle-anchor:checked ~ .page-wrapper {
transform: translateX(calc(0px - var(--sidebar-width) - var(--sidebar-resize-indicator-width)));
}
@media only screen and (min-width: 620px) {
#sidebar-toggle-anchor:checked ~ .page-wrapper {
transform: none;
margin-inline-start: calc(var(--sidebar-width) + var(--sidebar-resize-indicator-width));
}
[dir=rtl] #sidebar-toggle-anchor:checked ~ .page-wrapper {
transform: none;
}
}
.chapter {
list-style: none outside none;
padding-inline-start: 0;
line-height: 2.2em;
}
.chapter ol {
width: 100%;
}
.chapter li {
display: flex;
color: var(--sidebar-non-existant);
}
.chapter li a {
display: block;
padding: 0;
text-decoration: none;
color: var(--sidebar-fg);
}
.chapter li a:hover {
color: var(--sidebar-active);
}
.chapter li a.active {
color: var(--sidebar-active);
}
.chapter li > a.toggle {
cursor: pointer;
display: block;
margin-inline-start: auto;
padding: 0 10px;
user-select: none;
opacity: 0.68;
}
.chapter li > a.toggle div {
transition: transform 0.5s;
}
/* collapse the section */
.chapter li:not(.expanded) + li > ol {
display: none;
}
.chapter li.chapter-item {
line-height: 1.5em;
margin-block-start: 0.6em;
}
.chapter li.expanded > a.toggle div {
transform: rotate(90deg);
}
.spacer {
width: 100%;
height: 3px;
margin: 5px 0px;
}
.chapter .spacer {
background-color: var(--sidebar-spacer);
}
@media (-moz-touch-enabled: 1), (pointer: coarse) {
.chapter li a { padding: 5px 0; }
.spacer { margin: 10px 0; }
}
.section {
list-style: none outside none;
padding-inline-start: 20px;
line-height: 1.9em;
}
/* Theme Menu Popup */
.theme-popup {
position: absolute;
left: 10px;
top: var(--menu-bar-height);
z-index: 1000;
border-radius: 4px;
font-size: 0.7em;
color: var(--fg);
background: var(--theme-popup-bg);
border: 1px solid var(--theme-popup-border);
margin: 0;
padding: 0;
list-style: none;
display: none;
/* Don't let the children's background extend past the rounded corners. */
overflow: hidden;
}
[dir=rtl] .theme-popup { left: unset; right: 10px; }
.theme-popup .default {
color: var(--icons);
}
.theme-popup .theme {
width: 100%;
border: 0;
margin: 0;
padding: 2px 20px;
line-height: 25px;
white-space: nowrap;
text-align: start;
cursor: pointer;
color: inherit;
background: inherit;
font-size: inherit;
}
.theme-popup .theme:hover {
background-color: var(--theme-hover);
}
.theme-selected::before {
display: inline-block;
content: "✓";
margin-inline-start: -14px;
width: 14px;
}

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/* Base styles and content styles */
:root {
/* Browser default font-size is 16px, this way 1 rem = 10px */
font-size: 72.5%;
color-scheme: var(--color-scheme);
}
html {
font-family: "Open Sans", sans-serif;
color: var(--fg);
background-color: var(--bg);
text-size-adjust: none;
-webkit-text-size-adjust: none;
}
body {
margin: 0;
font-size: 1.6rem;
overflow-x: hidden;
}
code {
font-family: var(--mono-font) !important;
font-size: var(--code-font-size);
direction: ltr !important;
}
/* make long words/inline code not x overflow */
main {
overflow-wrap: break-word;
}
/* make wide tables scroll if they overflow */
.table-wrapper {
overflow-x: auto;
}
/* Don't change font size in headers. */
h1 code, h2 code, h3 code, h4 code, h5 code, h6 code {
font-size: unset;
}
.left { float: left; }
.right { float: right; }
.boring { opacity: 0.6; }
.hide-boring .boring { display: none; }
.hidden { display: none !important; }
h2, h3 { margin-block-start: 2.5em; }
h4, h5 { margin-block-start: 2em; }
.header + .header h3,
.header + .header h4,
.header + .header h5 {
margin-block-start: 1em;
}
h1:target::before,
h2:target::before,
h3:target::before,
h4:target::before,
h5:target::before,
h6:target::before {
display: inline-block;
content: "»";
margin-inline-start: -30px;
width: 30px;
}
/* This is broken on Safari as of version 14, but is fixed
in Safari Technology Preview 117 which I think will be Safari 14.2.
https://bugs.webkit.org/show_bug.cgi?id=218076
*/
:target {
/* Safari does not support logical properties */
scroll-margin-top: calc(var(--menu-bar-height) + 0.5em);
}
.page {
outline: 0;
padding: 0 var(--page-padding);
margin-block-start: calc(0px - var(--menu-bar-height)); /* Compensate for the #menu-bar-hover-placeholder */
}
.page-wrapper {
box-sizing: border-box;
background-color: var(--bg);
}
.no-js .page-wrapper,
.js:not(.sidebar-resizing) .page-wrapper {
transition: margin-left 0.3s ease, transform 0.3s ease; /* Animation: slide away */
}
[dir=rtl] .js:not(.sidebar-resizing) .page-wrapper {
transition: margin-right 0.3s ease, transform 0.3s ease; /* Animation: slide away */
}
.content {
overflow-y: auto;
padding: 0 5px 50px 5px;
}
.content main {
margin-inline-start: auto;
margin-inline-end: auto;
max-width: var(--content-max-width);
}
.content p { line-height: 1.45em; }
.content ol { line-height: 1.45em; }
.content ul { line-height: 1.45em; }
.content a { text-decoration: none; }
.content a:hover { text-decoration: underline; }
.content img, .content video { max-width: 100%; }
.content .header:link,
.content .header:visited {
color: var(--fg);
}
.content .header:link,
.content .header:visited:hover {
text-decoration: none;
}
table {
margin: 0 auto;
border-collapse: collapse;
}
table td {
padding: 3px 20px;
border: 1px var(--table-border-color) solid;
}
table thead {
background: var(--table-header-bg);
}
table thead td {
font-weight: 700;
border: none;
}
table thead th {
padding: 3px 20px;
}
table thead tr {
border: 1px var(--table-header-bg) solid;
}
/* Alternate background colors for rows */
table tbody tr:nth-child(2n) {
background: var(--table-alternate-bg);
}
blockquote {
margin: 20px 0;
padding: 0 20px;
color: var(--fg);
background-color: var(--quote-bg);
border-block-start: .1em solid var(--quote-border);
border-block-end: .1em solid var(--quote-border);
}
.warning {
margin: 20px;
padding: 0 20px;
border-inline-start: 2px solid var(--warning-border);
}
.warning:before {
position: absolute;
width: 3rem;
height: 3rem;
margin-inline-start: calc(-1.5rem - 21px);
content: "ⓘ";
text-align: center;
background-color: var(--bg);
color: var(--warning-border);
font-weight: bold;
font-size: 2rem;
}
blockquote .warning:before {
background-color: var(--quote-bg);
}
kbd {
background-color: var(--table-border-color);
border-radius: 4px;
border: solid 1px var(--theme-popup-border);
box-shadow: inset 0 -1px 0 var(--theme-hover);
display: inline-block;
font-size: var(--code-font-size);
font-family: var(--mono-font);
line-height: 10px;
padding: 4px 5px;
vertical-align: middle;
}
sup {
/* Set the line-height for superscript and footnote references so that there
isn't an awkward space appearing above lines that contain the footnote.
See https://github.com/rust-lang/mdBook/pull/2443#discussion_r1813773583
for an explanation.
*/
line-height: 0;
}
:not(.footnote-definition) + .footnote-definition,
.footnote-definition + :not(.footnote-definition) {
margin-block-start: 2em;
}
.footnote-definition {
font-size: 0.9em;
margin: 0.5em 0;
}
.footnote-definition p {
display: inline;
}
.tooltiptext {
position: absolute;
visibility: hidden;
color: #fff;
background-color: #333;
transform: translateX(-50%); /* Center by moving tooltip 50% of its width left */
left: -8px; /* Half of the width of the icon */
top: -35px;
font-size: 0.8em;
text-align: center;
border-radius: 6px;
padding: 5px 8px;
margin: 5px;
z-index: 1000;
}
.tooltipped .tooltiptext {
visibility: visible;
}
.chapter li.part-title {
color: var(--sidebar-fg);
margin: 5px 0px;
font-weight: bold;
}
.result-no-output {
font-style: italic;
}

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#sidebar,
#menu-bar,
.nav-chapters,
.mobile-nav-chapters {
display: none;
}
#page-wrapper.page-wrapper {
transform: none !important;
margin-inline-start: 0px;
overflow-y: initial;
}
#content {
max-width: none;
margin: 0;
padding: 0;
}
.page {
overflow-y: initial;
}
code {
direction: ltr !important;
}
pre > .buttons {
z-index: 2;
}
a, a:visited, a:active, a:hover {
color: #4183c4;
text-decoration: none;
}
h1, h2, h3, h4, h5, h6 {
page-break-inside: avoid;
page-break-after: avoid;
}
pre, code {
page-break-inside: avoid;
white-space: pre-wrap;
}
.fa {
display: none !important;
}

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/* Globals */
:root {
--sidebar-width: 300px;
--sidebar-resize-indicator-width: 8px;
--sidebar-resize-indicator-space: 2px;
--page-padding: 15px;
--content-max-width: 1150px;
--menu-bar-height: 50px;
--mono-font: "Source Code Pro", Consolas, "Ubuntu Mono", Menlo, "DejaVu Sans Mono", monospace, monospace;
--code-font-size: 0.875em /* please adjust the ace font size accordingly in editor.js */
}
/* Themes */
.ayu {
--bg: hsl(210, 25%, 8%);
--fg: #c5c5c5;
--sidebar-bg: #14191f;
--sidebar-fg: #c8c9db;
--sidebar-non-existant: #5c6773;
--sidebar-active: #ffb454;
--sidebar-spacer: #2d334f;
--scrollbar: var(--sidebar-fg);
--icons: #737480;
--icons-hover: #b7b9cc;
--links: #0096cf;
--inline-code-color: #ffb454;
--theme-popup-bg: #14191f;
--theme-popup-border: #5c6773;
--theme-hover: #191f26;
--quote-bg: hsl(226, 15%, 17%);
--quote-border: hsl(226, 15%, 22%);
--warning-border: #ff8e00;
--table-border-color: hsl(210, 25%, 13%);
--table-header-bg: hsl(210, 25%, 28%);
--table-alternate-bg: hsl(210, 25%, 11%);
--searchbar-border-color: #848484;
--searchbar-bg: #424242;
--searchbar-fg: #fff;
--searchbar-shadow-color: #d4c89f;
--searchresults-header-fg: #666;
--searchresults-border-color: #888;
--searchresults-li-bg: #252932;
--search-mark-bg: #e3b171;
--color-scheme: dark;
/* Same as `--icons` */
--copy-button-filter: invert(45%) sepia(6%) saturate(621%) hue-rotate(198deg) brightness(99%) contrast(85%);
/* Same as `--sidebar-active` */
--copy-button-filter-hover: invert(68%) sepia(55%) saturate(531%) hue-rotate(341deg) brightness(104%) contrast(101%);
}
.coal {
--bg: hsl(200, 7%, 8%);
--fg: #98a3ad;
--sidebar-bg: #292c2f;
--sidebar-fg: #a1adb8;
--sidebar-non-existant: #505254;
--sidebar-active: #3473ad;
--sidebar-spacer: #393939;
--scrollbar: var(--sidebar-fg);
--icons: #43484d;
--icons-hover: #b3c0cc;
--links: #2b79a2;
--inline-code-color: #c5c8c6;
--theme-popup-bg: #141617;
--theme-popup-border: #43484d;
--theme-hover: #1f2124;
--quote-bg: hsl(234, 21%, 18%);
--quote-border: hsl(234, 21%, 23%);
--warning-border: #ff8e00;
--table-border-color: hsl(200, 7%, 13%);
--table-header-bg: hsl(200, 7%, 28%);
--table-alternate-bg: hsl(200, 7%, 11%);
--searchbar-border-color: #aaa;
--searchbar-bg: #b7b7b7;
--searchbar-fg: #000;
--searchbar-shadow-color: #aaa;
--searchresults-header-fg: #666;
--searchresults-border-color: #98a3ad;
--searchresults-li-bg: #2b2b2f;
--search-mark-bg: #355c7d;
--color-scheme: dark;
/* Same as `--icons` */
--copy-button-filter: invert(26%) sepia(8%) saturate(575%) hue-rotate(169deg) brightness(87%) contrast(82%);
/* Same as `--sidebar-active` */
--copy-button-filter-hover: invert(36%) sepia(70%) saturate(503%) hue-rotate(167deg) brightness(98%) contrast(89%);
}
.light, html:not(.js) {
--bg: hsl(0, 0%, 100%);
--fg: hsl(0, 0%, 0%);
--sidebar-bg: #fafafa;
--sidebar-fg: hsl(0, 0%, 0%);
--sidebar-non-existant: #aaaaaa;
--sidebar-active: #1f1fff;
--sidebar-spacer: #f4f4f4;
--scrollbar: #8F8F8F;
--icons: #747474;
--icons-hover: #000000;
--links: #20609f;
--inline-code-color: #301900;
--theme-popup-bg: #fafafa;
--theme-popup-border: #cccccc;
--theme-hover: #e6e6e6;
--quote-bg: hsl(197, 37%, 96%);
--quote-border: hsl(197, 37%, 91%);
--warning-border: #ff8e00;
--table-border-color: hsl(0, 0%, 95%);
--table-header-bg: hsl(0, 0%, 80%);
--table-alternate-bg: hsl(0, 0%, 97%);
--searchbar-border-color: #aaa;
--searchbar-bg: #fafafa;
--searchbar-fg: #000;
--searchbar-shadow-color: #aaa;
--searchresults-header-fg: #666;
--searchresults-border-color: #888;
--searchresults-li-bg: #e4f2fe;
--search-mark-bg: #a2cff5;
--color-scheme: light;
/* Same as `--icons` */
--copy-button-filter: invert(45.49%);
/* Same as `--sidebar-active` */
--copy-button-filter-hover: invert(14%) sepia(93%) saturate(4250%) hue-rotate(243deg) brightness(99%) contrast(130%);
}
.navy {
--bg: hsl(226, 23%, 11%);
--fg: #bcbdd0;
--sidebar-bg: #282d3f;
--sidebar-fg: #c8c9db;
--sidebar-non-existant: #505274;
--sidebar-active: #2b79a2;
--sidebar-spacer: #2d334f;
--scrollbar: var(--sidebar-fg);
--icons: #737480;
--icons-hover: #b7b9cc;
--links: #2b79a2;
--inline-code-color: #c5c8c6;
--theme-popup-bg: #161923;
--theme-popup-border: #737480;
--theme-hover: #282e40;
--quote-bg: hsl(226, 15%, 17%);
--quote-border: hsl(226, 15%, 22%);
--warning-border: #ff8e00;
--table-border-color: hsl(226, 23%, 16%);
--table-header-bg: hsl(226, 23%, 31%);
--table-alternate-bg: hsl(226, 23%, 14%);
--searchbar-border-color: #aaa;
--searchbar-bg: #aeaec6;
--searchbar-fg: #000;
--searchbar-shadow-color: #aaa;
--searchresults-header-fg: #5f5f71;
--searchresults-border-color: #5c5c68;
--searchresults-li-bg: #242430;
--search-mark-bg: #a2cff5;
--color-scheme: dark;
/* Same as `--icons` */
--copy-button-filter: invert(51%) sepia(10%) saturate(393%) hue-rotate(198deg) brightness(86%) contrast(87%);
/* Same as `--sidebar-active` */
--copy-button-filter-hover: invert(46%) sepia(20%) saturate(1537%) hue-rotate(156deg) brightness(85%) contrast(90%);
}
.rust {
--bg: hsl(60, 9%, 87%);
--fg: #262625;
--sidebar-bg: #3b2e2a;
--sidebar-fg: #c8c9db;
--sidebar-non-existant: #505254;
--sidebar-active: #e69f67;
--sidebar-spacer: #45373a;
--scrollbar: var(--sidebar-fg);
--icons: #737480;
--icons-hover: #262625;
--links: #2b79a2;
--inline-code-color: #6e6b5e;
--theme-popup-bg: #e1e1db;
--theme-popup-border: #b38f6b;
--theme-hover: #99908a;
--quote-bg: hsl(60, 5%, 75%);
--quote-border: hsl(60, 5%, 70%);
--warning-border: #ff8e00;
--table-border-color: hsl(60, 9%, 82%);
--table-header-bg: #b3a497;
--table-alternate-bg: hsl(60, 9%, 84%);
--searchbar-border-color: #aaa;
--searchbar-bg: #fafafa;
--searchbar-fg: #000;
--searchbar-shadow-color: #aaa;
--searchresults-header-fg: #666;
--searchresults-border-color: #888;
--searchresults-li-bg: #dec2a2;
--search-mark-bg: #e69f67;
/* Same as `--icons` */
--copy-button-filter: invert(51%) sepia(10%) saturate(393%) hue-rotate(198deg) brightness(86%) contrast(87%);
/* Same as `--sidebar-active` */
--copy-button-filter-hover: invert(77%) sepia(16%) saturate(1798%) hue-rotate(328deg) brightness(98%) contrast(83%);
}
@media (prefers-color-scheme: dark) {
html:not(.js) {
--bg: hsl(200, 7%, 8%);
--fg: #98a3ad;
--sidebar-bg: #292c2f;
--sidebar-fg: #a1adb8;
--sidebar-non-existant: #505254;
--sidebar-active: #3473ad;
--sidebar-spacer: #393939;
--scrollbar: var(--sidebar-fg);
--icons: #43484d;
--icons-hover: #b3c0cc;
--links: #2b79a2;
--inline-code-color: #c5c8c6;
--theme-popup-bg: #141617;
--theme-popup-border: #43484d;
--theme-hover: #1f2124;
--quote-bg: hsl(234, 21%, 18%);
--quote-border: hsl(234, 21%, 23%);
--warning-border: #ff8e00;
--table-border-color: hsl(200, 7%, 13%);
--table-header-bg: hsl(200, 7%, 28%);
--table-alternate-bg: hsl(200, 7%, 11%);
--searchbar-border-color: #aaa;
--searchbar-bg: #b7b7b7;
--searchbar-fg: #000;
--searchbar-shadow-color: #aaa;
--searchresults-header-fg: #666;
--searchresults-border-color: #98a3ad;
--searchresults-li-bg: #2b2b2f;
--search-mark-bg: #355c7d;
--color-scheme: dark;
/* Same as `--icons` */
--copy-button-filter: invert(26%) sepia(8%) saturate(575%) hue-rotate(169deg) brightness(87%) contrast(82%);
/* Same as `--sidebar-active` */
--copy-button-filter-hover: invert(36%) sepia(70%) saturate(503%) hue-rotate(167deg) brightness(98%) contrast(89%);
}
}

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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
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@ -0,0 +1,93 @@
Copyright 2010, 2012 Adobe Systems Incorporated (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe Systems Incorporated in the United States and/or other countries.
This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
http://scripts.sil.org/OFL
-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------
PREAMBLE
The goals of the Open Font License (OFL) are to stimulate worldwide
development of collaborative font projects, to support the font creation
efforts of academic and linguistic communities, and to provide a free and
open framework in which fonts may be shared and improved in partnership
with others.
The OFL allows the licensed fonts to be used, studied, modified and
redistributed freely as long as they are not sold by themselves. The
fonts, including any derivative works, can be bundled, embedded,
redistributed and/or sold with any software provided that any reserved
names are not used by derivative works. The fonts and derivatives,
however, cannot be released under any other type of license. The
requirement for fonts to remain under this license does not apply
to any document created using the fonts or their derivatives.
DEFINITIONS
"Font Software" refers to the set of files released by the Copyright
Holder(s) under this license and clearly marked as such. This may
include source files, build scripts and documentation.
"Reserved Font Name" refers to any names specified as such after the
copyright statement(s).
"Original Version" refers to the collection of Font Software components as
distributed by the Copyright Holder(s).
"Modified Version" refers to any derivative made by adding to, deleting,
or substituting -- in part or in whole -- any of the components of the
Original Version, by changing formats or by porting the Font Software to a
new environment.
"Author" refers to any designer, engineer, programmer, technical
writer or other person who contributed to the Font Software.
PERMISSION & CONDITIONS
Permission is hereby granted, free of charge, to any person obtaining
a copy of the Font Software, to use, study, copy, merge, embed, modify,
redistribute, and sell modified and unmodified copies of the Font
Software, subject to the following conditions:
1) Neither the Font Software nor any of its individual components,
in Original or Modified Versions, may be sold by itself.
2) Original or Modified Versions of the Font Software may be bundled,
redistributed and/or sold with any software, provided that each copy
contains the above copyright notice and this license. These can be
included either as stand-alone text files, human-readable headers or
in the appropriate machine-readable metadata fields within text or
binary files as long as those fields can be easily viewed by the user.
3) No Modified Version of the Font Software may use the Reserved Font
Name(s) unless explicit written permission is granted by the corresponding
Copyright Holder. This restriction only applies to the primary font name as
presented to the users.
4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
Software shall not be used to promote, endorse or advertise any
Modified Version, except to acknowledge the contribution(s) of the
Copyright Holder(s) and the Author(s) or with their explicit written
permission.
5) The Font Software, modified or unmodified, in part or in whole,
must be distributed entirely under this license, and must not be
distributed under any other license. The requirement for fonts to
remain under this license does not apply to any document created
using the Font Software.
TERMINATION
This license becomes null and void if any of the above conditions are
not met.
DISCLAIMER
THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
OTHER DEALINGS IN THE FONT SOFTWARE.

110
theme/fonts/fonts.css Normal file
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/* Open Sans is licensed under the Apache License, Version 2.0. See http://www.apache.org/licenses/LICENSE-2.0 */
/* Source Code Pro is under the Open Font License. See https://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL */
/* open-sans-300 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: normal;
font-weight: 300;
src: local('Open Sans Light'), local('OpenSans-Light'),
url('open-sans-v17-all-charsets-300.woff2') format('woff2');
}
/* open-sans-300italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: italic;
font-weight: 300;
src: local('Open Sans Light Italic'), local('OpenSans-LightItalic'),
url('open-sans-v17-all-charsets-300italic.woff2') format('woff2');
}
/* open-sans-regular - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: normal;
font-weight: 400;
src: local('Open Sans Regular'), local('OpenSans-Regular'),
url('open-sans-v17-all-charsets-regular.woff2') format('woff2');
}
/* open-sans-italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: italic;
font-weight: 400;
src: local('Open Sans Italic'), local('OpenSans-Italic'),
url('open-sans-v17-all-charsets-italic.woff2') format('woff2');
}
/* open-sans-600 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: normal;
font-weight: 600;
src: local('Open Sans SemiBold'), local('OpenSans-SemiBold'),
url('open-sans-v17-all-charsets-600.woff2') format('woff2');
}
/* open-sans-600italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: italic;
font-weight: 600;
src: local('Open Sans SemiBold Italic'), local('OpenSans-SemiBoldItalic'),
url('open-sans-v17-all-charsets-600italic.woff2') format('woff2');
}
/* open-sans-700 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: normal;
font-weight: 700;
src: local('Open Sans Bold'), local('OpenSans-Bold'),
url('open-sans-v17-all-charsets-700.woff2') format('woff2');
}
/* open-sans-700italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: italic;
font-weight: 700;
src: local('Open Sans Bold Italic'), local('OpenSans-BoldItalic'),
url('open-sans-v17-all-charsets-700italic.woff2') format('woff2');
}
/* open-sans-800 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: normal;
font-weight: 800;
src: local('Open Sans ExtraBold'), local('OpenSans-ExtraBold'),
url('open-sans-v17-all-charsets-800.woff2') format('woff2');
}
/* open-sans-800italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Open Sans';
font-style: italic;
font-weight: 800;
src: local('Open Sans ExtraBold Italic'), local('OpenSans-ExtraBoldItalic'),
url('open-sans-v17-all-charsets-800italic.woff2') format('woff2');
}
/* source-code-pro-500 - latin_vietnamese_latin-ext_greek_cyrillic-ext_cyrillic */
@font-face {
font-family: 'Source Code Pro';
font-style: normal;
font-weight: 500;
src: url('source-code-pro-v11-all-charsets-500.woff2') format('woff2');
}
@font-face {
font-family: 'Poppins';
font-style: normal;
font-weight: 400;
src: url('poppins-v21-latin-regular.woff2') format('woff2');
}

61
theme/fonts/mod.rs Normal file
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pub static CSS: &[u8] = include_bytes!("fonts.css");
// An array of (file_name, file_contents) pairs
pub static LICENSES: [(&str, &[u8]); 2] = [
(
"fonts/OPEN-SANS-LICENSE.txt",
include_bytes!("OPEN-SANS-LICENSE.txt"),
),
(
"fonts/SOURCE-CODE-PRO-LICENSE.txt",
include_bytes!("SOURCE-CODE-PRO-LICENSE.txt"),
),
];
// An array of (file_name, file_contents) pairs
pub static OPEN_SANS: [(&str, &[u8]); 10] = [
(
"fonts/open-sans-v17-all-charsets-300.woff2",
include_bytes!("open-sans-v17-all-charsets-300.woff2"),
),
(
"fonts/open-sans-v17-all-charsets-300italic.woff2",
include_bytes!("open-sans-v17-all-charsets-300italic.woff2"),
),
(
"fonts/open-sans-v17-all-charsets-regular.woff2",
include_bytes!("open-sans-v17-all-charsets-regular.woff2"),
),
(
"fonts/open-sans-v17-all-charsets-italic.woff2",
include_bytes!("open-sans-v17-all-charsets-italic.woff2"),
),
(
"fonts/open-sans-v17-all-charsets-600.woff2",
include_bytes!("open-sans-v17-all-charsets-600.woff2"),
),
(
"fonts/open-sans-v17-all-charsets-600italic.woff2",
include_bytes!("open-sans-v17-all-charsets-600italic.woff2"),
),
(
"fonts/open-sans-v17-all-charsets-700.woff2",
include_bytes!("open-sans-v17-all-charsets-700.woff2"),
),
(
"fonts/open-sans-v17-all-charsets-700italic.woff2",
include_bytes!("open-sans-v17-all-charsets-700italic.woff2"),
),
(
"fonts/open-sans-v17-all-charsets-800.woff2",
include_bytes!("open-sans-v17-all-charsets-800.woff2"),
),
(
"fonts/open-sans-v17-all-charsets-800italic.woff2",
include_bytes!("open-sans-v17-all-charsets-800italic.woff2"),
),
];
// A (file_name, file_contents) pair
pub static SOURCE_CODE_PRO: (&str, &[u8]) = (
"fonts/source-code-pro-v11-all-charsets-500.woff2",
include_bytes!("source-code-pro-v11-all-charsets-500.woff2"),
);

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