hello-lang

A tiny programming language built using C.

This language was create following the tutorial series by Ianertson. The original developed repository from the videos is available here https://github.com/sebbekarlsson/hello

How it works

The lexer receives the source code and creates tokens from it. Then the parser gets the tokens from the lexer and generates the AST (Abstract Syntax Tree) from it. After that, the visitor receives the AST root node and then it knows what to do with each AST node type.

Source structure

src
├── AST.c
├── include
│   ├── AST.h
│   ├── lexer.h
│   ├── main.h
│   ├── parser.h
│   ├── token.h
│   └── visitor.h
├── lexer.c
├── main.c
├── parser.c
├── token.c
└── visitor.c

Syntax

The syntax is similar to JavaScript and it requires semicolons at the end of each statement.

var name = "John Doe";
var othername = "Sarah";

print(name, othername);

Usage

$ hello examples/print.hello

Jhon Doe
Sarah

Build

Local cmd

• Run make
• Execute hello.out with a filename, like this $ hello.out examples/print.hello

Global cmd

• Run sudo make install
• Execute hello with a filename, like this $ hello examples/print.hello

Clean workspace

• Run make clean