🏗️ Blocks

Blocks are expressions that create scoped environments for variable bindings and computation. They are enclosed in curly braces {} and must contain at least one binding followed by a return expression.

📝 Basic Syntax

{
    variable = value;
    another_var = expression;

    return_expression
}

Requirements:

1. At least one binding (variable = value;)
2. A return expression (the last expression without semicolon)

🔒 Variable Scoping

Variables are scoped to their block and accessible in nested blocks:

{
    outer_var = "accessible everywhere";

    config = {
        inner_var = "only accessible inside";
        result = concat(outer_var, " and ", inner_var);

        result
    };

    config
}

🎯 Common Use Cases

Configuration Building

{
    app_name = "my-service";
    base_port = 8080;

    service_config = {
        name = app_name;
        image = concat("registry/", name, ":latest");
        port = base_port;

        ["name": name, "image": image, "port": port]
    };

    ["service": service_config]
}

Environment-Specific Settings

{
    env = "production";

    config = ? (env == "production") : {
        host = "prod-server.com";
        ssl = true;

        ["host": host, "ssl": ssl]
    } | {
        host = "localhost";
        ssl = false;

        ["host": host, "ssl": ssl]
    };

    config
}