ClrPlus.Core.Extensions.StringExtensions.ProcessMacroInternal C# (CSharp) Method

        private static string ProcessMacroInternal(this string value, GetMacroValueDelegate getMacroValue, object eachItem = null) {
            bool keepGoing;
            do {
                keepGoing = false;
                foreach (var macro in Macros) {
                    var matches = macro.Matches(value);
                    foreach (var m in matches) {
                        var match = m as Match;
                        var innerMacro = match.Groups[2].Value;
                        var outerMacro = match.Groups[1].Value;

                        string replacement = null;

                        // get the first responder.
                        foreach (GetMacroValueDelegate del in getMacroValue.GetInvocationList()) {
                            replacement = del(innerMacro);
                            if (replacement != null) {
                                break;
                            }
                        }

                        if (eachItem != null) {
                            // try resolving it as an ${each.property} style.
                            // the element at the front is the 'this' value
                            // just trim off whatever is at the front up to and including the first dot.
                            try {
                                if (innerMacro.Contains(".")) {
                                    innerMacro = innerMacro.Substring(innerMacro.IndexOf('.') + 1).Trim();
                                    var r = eachItem.SimpleEval(innerMacro).ToString();
                                    value = value.Replace(outerMacro, r);
                                    keepGoing = true;
                                }
                            } catch {
                                // meh. screw em'
                            }
                        }

                        if (replacement != null) {
                            value = value.Replace(outerMacro, replacement);
                            keepGoing = true;
                            break;
                        }
                    }
                }
            } while (keepGoing);
            return value;
        }