/* (c) https://github.com/MontiCore/monticore */
package de.monticore.siunit;

/* This is a MontiCore stable grammar.
 * Adaptations -- if any -- are conservative. */

/**
 * This grammar defines SI unit literals 
 * based on all the available SI units such as 
 * '3 m', '2.5 km', '1 km^2' or '3.54l m*deg/(h^2*mg)'
 *
 * The definitions are fully compliant to the definitions given in
 * International Bureau of Weights and Measures (20 May 2019),
 * SI Brochure: The International System of Units (SI)(9th ed.)
 *
 * Caution:
 * Java long and float unfortunately conflict with SI Units "F" and "L".
 * We therefore decided:
 * If the number is followed by L (or F respectively), the literal will 
 * be parsed as BasicLongLiteral "30L" or BasicFloatLiteral "30.2F"
 * Only if a space is inbetween, it becomes a Liter Literal "30 L"
 * or Farad Literal "30.2 F".
 * Accordingly "30Lkg" is not parsable, but "30L kg" and "30 L*kg" are.
 * 
 * The grammar extends the MontiCore common literals, because it uses
 * natural numbers e.g. as exponent.
 */
 
component grammar SIUnitLiterals extends 
                  de.monticore.siunit.SIUnits,
                  de.monticore.literals.MCCommonLiterals  {

  // The unsigned SI unit literals
  SIUnitLiteral implements Literal <10> =
    NumericLiteral SIUnit ;

  // The signed SI unit literals
  SignedSIUnitLiteral implements SignedLiteral <10> =
    SignedNumericLiteral SIUnit ;

}