public bool Parse(ExpressionCompiler compiler)
{
int i = compiler.Pos;
int start = -1;
char ch;
bool hasDecimal = false;
while (i < compiler.Expression.Length)
{
ch = compiler.Expression[i++];
if (start == -1)
{
if (char.IsWhiteSpace(ch))
{
continue;
}
else if (char.IsDigit(ch))
{
start = i - 1;
}
else
{
return(false);
}
}
else if (char.IsDigit(ch))
{
continue;
}
else if (ch == '.')
{
if (hasDecimal)
{
--i;
break;
}
else
{
hasDecimal = true;
}
}
else
{
--i;
break;
}
}
if (start != -1 && hasDecimal)
{
string s = new string(compiler.Expression, start, i - start);
s = s.Trim();
try {
DecimalToken token = new DecimalToken(float.Parse(s), compiler.Pos);
compiler.Parent.AddChild(token);
compiler.Pos = i;
return(true);
} catch (System.FormatException e) {
throw new ParserException("decimal", compiler.Pos, "Unable to parse as decimal: " + s, e);
}
}
return(false);
}
public void TestSimpleDecimal()
{
ValueToken result = new DecimalToken(123.456f);
Assert.AreEqual(123.456f, result.Value);
}
