/// <summary>
/// Get the <see cref="IString"/> of a <see cref="ILineString"/>.
///
/// If parameter "String" exists and <paramref name="resolver"/> is provided then value is resolved using
/// the default string format or the format that can be found.
/// </summary>
/// <param name="line"></param>
/// <param name="resolver">(optional) type resolver that resolves "IStringFormat" parameter into type. Returns null, if could not resolve, exception if resolve fails</param>
/// <param name="fallbackStringFormat">(optional) fallback string format to use in case line didnt have one</param>
/// <returns>value</returns>
/// <exception cref="LineException">error parsing</exception>
public static IString GetString(this ILine line, IResolver resolver = null, IStringFormat fallbackStringFormat = null)
{
for (ILine part = line; part != null; part = part.GetPreviousPart())
{
if (part is ILineString valuePart && valuePart.String != null)
{
return(valuePart.String);
}
if (resolver != null && part is ILineParameterEnumerable lineParameters)
{
foreach (ILineParameter parameter in lineParameters)
{
if (parameter.ParameterName == "String" && parameter.ParameterValue != null)
{
IStringFormat stringFormat = line.FindStringFormat(resolver) ?? fallbackStringFormat;
return(stringFormat.Parse(parameter.ParameterValue));
}
}
}
if (part is ILineParameter lineParameter && lineParameter.ParameterName == "String" && lineParameter.ParameterValue != null)
{
IStringFormat stringFormat = line.FindStringFormat(resolver) ?? fallbackStringFormat;
return(stringFormat.Parse(lineParameter.ParameterValue));
}
}
return(StatusString.Null);
}
/// <summary>
/// Try get string that implements <see cref="IString"/>.
/// </summary>
/// <param name="line"></param>
/// <param name="result"></param>
/// <param name="resolver">(optional) type resolver that resolves "StringFormat" parameter into type. Returns null, if could not resolve, exception if resolve fails</param>
/// <returns>true if part was found</returns>
public static bool TryGetString(this ILine line, out IString result, IResolver resolver = null)
{
try
{
for (ILine part = line; part != null; part = part.GetPreviousPart())
{
if (part is ILineString valuePart && valuePart.String != null)
{
result = valuePart.String; return(true);
}
if (resolver != null && part is ILineParameterEnumerable lineParameters)
{
foreach (ILineParameter parameter in lineParameters)
{
if (parameter.ParameterName == "String" && parameter.ParameterValue != null)
{
IStringFormat stringFormat = line.FindStringFormat(resolver);
result = stringFormat.Parse(parameter.ParameterValue);
return(true);
}
}
}
if (resolver != null && part is ILineParameter lineParameter && lineParameter.ParameterName == "String" && lineParameter.ParameterValue != null)
{
IStringFormat stringFormat = line.FindStringFormat(resolver);
result = stringFormat.Parse(lineParameter.ParameterValue);
return(true);
}
}
result = new StatusString(null, LineStatus.StringFormatFailedNull);
return(false);
} catch (Exception)
{
result = new StatusString(null, LineStatus.FailedUnknownReason);
return(false);
}
}
public static void Main(string[] args)
{
{
#region Snippet_0a
IStringFormat stringFormat = CSharpFormat.Default;
IString str = stringFormat.Parse("Hello, {0}.");
#endregion Snippet_0a
}
{
#region Snippet_0b
ILine line = LineRoot.Global.Key("").Format("Hello, {0}.");
#endregion Snippet_0b
}
{
#region Snippet_1a
IStringFormat stringFormat = TextFormat.Default;
IString str = stringFormat.Parse("{in braces}");
#endregion Snippet_1a
}
{
#region Snippet_1b
ILine line = LineRoot.Global.Key("").Text("{in braces}");
#endregion Snippet_1b
}
{
#region Snippet_2a
IStringFormat stringFormat = CSharpFormat.Default;
IString str = stringFormat.Parse("Hello, {0}.");
#endregion Snippet_2a
#region Snippet_2b
ILine line = LineRoot.Global.Key("Hello").String(str);
#endregion Snippet_2b
#region Snippet_2c
LineString lineString = line.Value("Corellia Melody").ResolveString();
#endregion Snippet_2c
#region Snippet_2d
if (!lineString.Failed)
{
Console.WriteLine(lineString.Value);
}
#endregion Snippet_2d
}
{
#region Snippet_3
// Convert unescaped string "{not placeholder}" to IString
IString ss = TextFormat.Default.Parse("{not placeholder}");
// Escape with CSharpFormat to "\{not placeholder\}"
string str = CSharpFormat.Default.Print(ss);
// Convert escaped string back to IString
IString cs = CSharpFormat.Default.Parse(str);
// Unescape IString back to "{not placeholder}"
string tt = TextFormat.Default.Print(cs);
#endregion Snippet_3
Console.WriteLine(tt);
}
{
#region Snippet_4
#endregion Snippet_4
}
{
#region Snippet_5
#endregion Snippet_5
}
{
#region Snippet_6
#endregion Snippet_6
}
{
#region Snippet_7
#endregion Snippet_7
}
{
#region Snippet_8
#endregion Snippet_8
}
}
