Modules

A module is a Letlang source file that MUST start with the module declaration statement.

Syntax

module_declaration_statement
  = "module" module_path ";"

module_path
  = identifier ("::" identifier)*

Example

module foo::main;

# ...

Imports

Other modules can be imported in the current module scope, and optionnally aliased.

Symbols from other modules can be imported in the current module scope, and each of them can be optionnally aliased.

Syntax

import_statement
  = ( "import" module_path ("as" identifier)? ";")
  / ( "from" module_path "import" "{" import_symbol ("," import_symbol)* ","? "}" ";")

import_symbol
  = identifier ("as" identifier)?

Examples

import std::io as stdio;
from std::proc import { self, send as send_message };

To access a symbol in an imported module, the complete path to the symbol is required:

symbol_path
  = identifier ("::" identifier)*

Example

stdio::println("hello world");

import std::io as stdio;
import std::proc;

let pub main: func[() -> @ok] {
  () -> {
    stdio::println(std::proc::self());
    @ok;
  },
};