Flee Culture Sensitive Expressions

Flee allows you to specify the culture used to parse expressions. You can enter expressions that use numbers in the format of a particular culture and have them be correctly parsed into an expression.

When the parse culture is set, Flee will use the CultureInfo.NumberFormat.NumberDecimalSeparator as the decimal point for real numbers and the CultureInfo.TextInfo.ListSeparator as the function argument separator.

The following example shows how to create an expression in English (US) culture.

public static void Example2()
{
    ExpressionContext context = new ExpressionContext();
    context.Options.ParseCulture = new CultureInfo("en-US");

    IDynamicExpression e = context.CompileDynamic("if(1<2, 3, 4)");

    Console.WriteLine(e.Evaluate());
}

The same expression is created using Finnish (Finland) culture.

public static void Example3()
{
    ExpressionContext context = new ExpressionContext();
    context.Imports.AddType(typeof(Math));
    context.Options.ParseCulture = new CultureInfo("fi-FI");

    IDynamicExpression e = context.CompileDynamic("if(1>2; 3; 4)");

    Console.WriteLine(e.Evaluate());
}

Here is another example that uses the expression created for French (France) culture.

public static void Example1()
{
    ExpressionContext context = new ExpressionContext();
    context.Options.ParseCulture = new CultureInfo("fr-FR");
    context.Imports.AddType(typeof(Math));

    // Create an expression that uses numbers in the culture's format
    IDynamicExpression e = context.CompileDynamic("round(100,75; 1)");
    object result = e.Evaluate();

    Console.WriteLine(result);
}