public static ParsedExpressionList Parse(string expressions)
{
Regex regex = new Regex(@"\n?(?<indent>[ \t]*)(?<expression>\S+)(\s+(?<name>[^ \t=]+)\s*=\s*'(?<value>[^']+)')*");
ParsedExpressionList currentList = new ParsedExpressionList();
ParsedExpressionList rootList = currentList;
int lastIndentLevel = -1;
Stack expressionListStack = new Stack();
foreach (Match match in regex.Matches(expressions))
{
string expression = null;
Hashtable arguments = null;
int currentIndentLevel = match.Groups["indent"].Length;
{
Group names = match.Groups["name"];
Group values = match.Groups["value"];
expression = match.Groups["expression"].ToString();
arguments = new Hashtable(names.Captures.Count);
for (int counter = 0;counter < names.Captures.Count;++counter)
{
arguments[names.Captures[counter].ToString()] = values.Captures[counter].ToString();
}
}
if (lastIndentLevel == -1)
{
lastIndentLevel = currentIndentLevel;
}
if (currentIndentLevel > lastIndentLevel)
{
ParsedExpressionList lastList = currentList;
// Push the current guy on the stack, set up a new one
expressionListStack.Push(currentList);
currentList = new ParsedExpressionList();
lastList += currentList;
}
else if (currentIndentLevel < lastIndentLevel)
{
// Pop lists until we get to this level
while (currentIndentLevel < currentList.IndentLevel)
{
currentList = (ParsedExpressionList) expressionListStack.Pop();
}
}
currentList += new ParsedExpression(expression, arguments, currentIndentLevel);
lastIndentLevel = currentIndentLevel;
}
return rootList;
}
public void AddExpression(ParsedExpression parsedExpression)
{
this.expressionList.Add(parsedExpression);
}
private static void MaybeCallPostCreateExpression(SDFState state, ParsedExpression expression, ParsedExpressionList children)
{
MethodInfo postCreateMethod = expression.Expression.GetType().GetMethod("PostCreateExpression");
if (postCreateMethod != null)
{
postCreateMethod.Invoke(expression.Expression, new Object[] { state, expression.ExpressionName, expression.Arguments, children });
}
}
