/**
 * Simple test grammar for build system verification
 */

module.exports = grammar({
  name: 'test_lang',

  word: $ => $.identifier,

  rules: {
    // Root rule
    source_file: $ => repeat(choice($.statement, $.expression)),

    // Basic tokens
    identifier: $ => /[a-zA-Z_][a-zA-Z0-9_]*/,
    number: $ => /\d+/,
    string: $ => /"[^"]*"/,

    // Expressions
    expression: $ => choice(
      $.identifier,
      $.number,
      $.string
    ),

    // Statements
    statement: $ => choice(
      $.variable_declaration
    ),

    // Variable declaration
    variable_declaration: $ => seq(
      'let',
      $.identifier,
      '=',
      $.expression,
      ';'
    ),

    // Comments
    line_comment: $ => seq('//', /[^\n]*/)
  },

  extras: $ => [
    /\s/,
    $.line_comment
  ]
});