internal override FSTemplate <T> Append(FSTemplate <T> template)
{
if (Templates.Last() is FElse <T> )
{
throw new InvalidOperationException("No operation can follow an Else");
}
if (Templates.Last() is FTakeRest <T> && !(template is FElse <T>))
{
throw new InvalidOperationException("No operation other than Else can follow a TakeRest");
}
var copy = new List <FSTemplate <T> >(Templates);
var asCombo = template as Combo <T>;
if (asCombo != null)
{
copy.AddRange(asCombo.Templates);
}
else
{
copy.Add(template);
}
return(new Combo <T> {
Templates = copy
});
}
/// <summary>
/// Backtracks until <paramref name="until"/> is encountered in the string.
///
/// The current index will be placed after the found string.
///
/// If <paramref name="until"/> is not found, the directive fails.
/// </summary>
public static FSTemplate <T> Back <T>(this FSTemplate <T> template, string until) where T : class
{
ValidateNeedle(until, "until");
return(template.Append(new FMoveBackUntil <T> {
Until = until
}));
}
/// <summary>
/// Every directive can have a single TakeRest directive.
///
/// This takes the remainder of the input string, and places it into the field
/// or property specified by <paramref name="member"/>.
///
/// Nothing can follow a TakeRest directive except an Else.
/// </summary>
public static FSTemplate <T> TakeRest <T>(this FSTemplate <T> template, MemberInfo member, string format = null) where T : class
{
ValidateMember <T>(member, format);
return(template.Append(new FTakeRest <T> {
Into = member, Format = format
}));
}
/// <summary>
/// Backtracks a certain number of characters in the string.
///
/// If the current index into the string is moved out of bounds,
/// the directive fails.
/// </summary>
public static FSTemplate <T> Back <T>(this FSTemplate <T> template, int n) where T : class
{
if (n <= 0)
{
throw new ArgumentException("Back expects a positive, non-zero, value; found [" + n + "]");
}
return(template.Append(new FMoveN <T> {
N = -1 * n
}));
}
internal virtual FSTemplate <T> Append(FSTemplate <T> template)
{
var copy = new List <FSTemplate <T> >();
copy.Add(this);
var asCombo = template as Combo <T>;
if (asCombo != null)
{
copy.AddRange(asCombo.Templates);
}
else
{
copy.Add(template);
}
return(new Combo <T> {
Templates = copy
});
}
internal override FSTemplate <T> Append(FSTemplate <T> template)
{
throw new InvalidOperationException("TakeRest cannot be followed by any operation");
}
/// <summary>
/// Concatenate one series of directives with another.
///
/// Will error if multiple TakeRest or Else directives
/// are defined by the union of the two series.
/// </summary>
public static FSTemplate <T> Append <T>(this FSTemplate <T> left, FSTemplate <T> right) where T : class
{
return(left.Append(right));
}
/// <summary>
/// Take a specific number of characters from the input string, parse them, and put
/// them into the given property on T.
///
/// Expects a positive, non-zero n.
/// </summary>
public static FSTemplate <T> Take <T>(this FSTemplate <T> template, int n, MemberInfo into, string format = null) where T : class
{
return(template.Append(Take <T>(n, into, format)));
}
/// <summary>
/// Take a specific number of characters from the input string, parse them, and put
/// them into the given property on T.
///
/// Expects a positive, non-zero n.
/// </summary>
public static FSTemplate <T> Take <T>(this FSTemplate <T> template, int n, string into, string format = null) where T : class
{
return(Take <T>(template, n, FindMember <T>(into), format));
}
/// <summary>
/// Advances a certain number of characters in the string.
///
/// If the current index into the string is moved out of bounds,
/// the directive fails.
/// </summary>
public static FSTemplate <T> Skip <T>(this FSTemplate <T> template, int n) where T : class
{
return(template.Append(Skip <T>(n)));
}
/// <summary>
/// Every directive can have a single TakeRest directive.
///
/// This takes the remainder of the input string, and places it into the field
/// or property specified by <paramref name="member"/>.
///
/// Nothing can follow a TakeRest directive except an Else.
/// </summary>
public static FSTemplate <T> TakeRest <T>(this FSTemplate <T> template, string member, string format = null) where T : class
{
return(TakeRest <T>(template, FindMember <T>(member), format));
}
/// <summary>
/// Every set of directives can have a single Else directive.
///
/// If any directive fails (expected string not found, moves before the start of the input string, or past
/// the end) the Else directive will be invoked.
///
/// The Else directive must be the last one to appear.
/// </summary>
public static FSTemplate <T> Else <T>(this FSTemplate <T> template, Action <string, T> call) where T : class
{
return(template.Append(new FElse <T> {
Call = call
}));
}
/// <summary>
/// Takes characters from the input string, and puts them in the property
/// or field referenced by <paramref name="member"/> until <paramref name="needle"/> is encountered.
///
/// <paramref name="needle"/> is not placed in <paramref name="member"/>.
///
/// Subsequent directives begin after <paramref name="needle"/>
///
/// If <paramref name="needle"/> is not found, any Else directive is run.
/// </summary>
public static FSTemplate <T> Take <T>(this FSTemplate <T> template, string until, MemberInfo member, string format = null) where T : class
{
return(template.Append(Take <T>(until, member, format)));
}
/// <summary>
/// Advance in the string until <paramref name="needle"/> is encountered.
///
/// Subsequent directives begin after <paramref name="needle"/>.
///
/// If <paramref name="needle"/> is not found, any Else directive is run.
/// </summary>
public static FSTemplate <T> Until <T>(this FSTemplate <T> template, string needle) where T : class
{
return(template.Append(Until <T>(needle)));
}
