// unit: NAME
// { $$ = new ScaledUnit($1) }
// unit: NAME '^' INT
// { $$ = new ScaledUnit($1, $3) }
ScaledUnit unit()
{
var t = PeekToken();
if (!t.Id.EQ(TokenId.NAME))
{
throw new ParserException(t, "unit ::= . NAME ( '^' INT )?");
}
GetToken();
Unit s1;
if (!ScaledUnit.TryParse(t.Value, out s1))
{
throw new ParserException(t, $"unit ::= . '{t.Value}' ( '^' INT )? ; NAME '{t.Value}' not recognised.");
}
int s3 = 1;
t = PeekToken();
if (t.Id.EQ(TokenId.PWR))
{
GetToken();
t = PeekToken();
if (!t.Id.EQ(TokenId.INT))
{
throw new ParserException(t, "unit ::= NAME '^' . INT");
}
GetToken();
s3 = int.Parse(t.Value);
}
return(new ScaledUnit(s1, s3));
}
/// <summary>
/// Append: Multiply (or divide) this Scale with an extra factor
/// </summary>
/// <param name="scale">Scale to append to this Scale</param>
/// <param name="reciproce">true: append [scale^-1] else append [scale]</param>
public void Append(ScaledUnit scale, bool reciproce = false)
{
Scale.Append(scale, reciproce);
}
/// <summary>
/// .ctor copy construtor to create a copy of another scale.
/// </summary>
/// <param name="other">scale to copy</param>
public ScaledUnit(ScaledUnit other)
{
Unit = other.Unit;
Exp = other.Exp;
}
