public static Parser.Parser ParseCore(this string expression, ExprBuilder builder)
{
Scanner scanner = new Scanner(expression);
Parser.Parser parser = new Parser.Parser(scanner, builder);
parser.Parse();
return parser;
}
public static Expr Diff(this Expr expr, ExprBuilder builder, string parameterName = null)
{
return expr.Visit(new DiffExpressionVisitor(builder, parameterName));
}
protected override Expr DiffCore(ExprBuilder builder, Expr arg)
{
return FunctionFactory.Exp(arg);
}
protected override Expr DiffCore(ExprBuilder builder, Expr arg)
{
return Expr.Function(FunctionFactory.CosName, arg);
}
protected override Expr DiffCore(ExprBuilder builder, Expr arg)
{
return builder.Inverse(arg);
}
public static Expr Parse(this string expression, ExprBuilder builder = null)
{
return GetExpression(ParseCore(expression, builder ?? ExprBuilderFactory.CreateDefault()));
}
public DiffExpressionVisitor(ExprBuilder builder, string parameterName)
{
this.builder = builder;
this.parameterName = parameterName;
autoParameterName = !HasParameter;
}
protected abstract Expr DiffCore(ExprBuilder builder, Expr arg);