static IConversionExpression BuildModel(string input)
{
var tokenizer = new ConversionTokenizer();
tokenizer.Tokenize(input, null);
var modelBuilder = new ConversionModelBuilder();
return(modelBuilder.BuildFrom(tokenizer.Tokens));
}
static IConversionExpression ConvertFromString(string input)
{
var tokens = new ConversionTokenizer();
tokens.Tokenize(input, null);
var model = new ConversionModelBuilder();
var converter = new MetricToImperialConverter();
return(converter.Convert(model.BuildFrom(tokens.Tokens)));
}