Book Image

Learn Bosque Programming

By : Sebastian Kaczmarek, Joel Ibaceta
Book Image

Learn Bosque Programming

By: Sebastian Kaczmarek, Joel Ibaceta

Overview of this book

Bosque is a new high-level programming language inspired by the impact of structured programming in the 1970s. It adopts the TypeScript syntax and ML semantics and is designed for writing code that is easy to reason about for humans and machines. With this book, you'll understand how Bosque supports high productivity and cloud-first development by removing sources of accidental complexity and introducing novel features. This short book covers all the language features that you need to know to work with Bosque programming. You'll learn about basic data types, variables, functions, operators, statements, and expressions in Bosque and become familiar with advanced features such as typed strings, bulk algebraic data operations, namespace declarations, and concept and entity declarations. This Bosque book provides a complete language reference for learning to program with Bosque and understanding the regularized programming paradigm. You'll also explore real-world examples that will help you to reinforce the knowledge you've acquired. Additionally, you'll discover more advanced topics such as the Bosque project structure and contributing to the project. By the end of this book, you'll have learned how to configure the Bosque environment and build better and reliable software with this exciting new open-source language.
Table of Contents (22 chapters)
1
Section 1: Introduction
5
Section 2: The Bosque Language Overview
10
Section 3: Practicing Bosque
15
Section 4: Exploring Advanced Features

Understanding return and yield

The return statement may sound familiar, and indeed the function it fulfills in Bosque scripts is the same function as in most languages. Within a block of code, it ends the invocation returning the expression's value as a result.

Let's understand this with the help of some examples:

namespace NSMain;
entrypoint function main(): String {
     return "hello world";
}

If we analyze the classic hello world, we will see that the input function is composed of a single return statement, so when we execute our script, the expression is evaluated, the execution is ended, and the text "hello world" is returned as a result.

So, if we try to add a second return statement below the first one, the execution of this second line will not be carried out because the first one ends the block's execution. The following code shows the line that won't be executed:

namespace NSMain;
entrypoint function...