<?xml version="1.0" encoding="UTF-8"?>

<grammar name="Math" author="me" version="1.0">
  <meta:about></meta:about>
  <meta:props>
    <prop name="encoding" type="string">Unicode</prop>
    <prop name="caseSensitive" type="bool">false</prop>
    <prop name="startSymbol" type="string">\<expression\></prop>
    <prop name="commentStart" type="string">/*</prop>
    <prop name="commentEnd" type="string">*/</prop>
    <prop name="commentLine" type="string">--</prop>
  </meta:props>


  <rule name="number">
    '-'? [1-9] [0-9]*
  </rule>
  <rule name="primary">
    '(' additive ')' / number
  </rule>
  <rule name="multitive">
    primary ( [*/%] primary )*
  </rule>
  <rule name="additive">
    multitive ( '+' multitive )*
  </rule>
</grammar>

<?pp
module "Hello";

function hello(){
  return "hello world";
}

// ---

import "Hello.module";
echo Hello\hello();
// hello world

?>