public FunctionDeclaration(Document parent, ref string Input)
: base(parent)
{
Pattern regExPattern =
"^\\s*" +
new Group("def",
new Group("type", Provider.type) +
"\\s+" +
new Group("identifier", Provider.identifier) +
"\\s*\\(" +
new Group("params",
"\\s*" +
Provider.type + "\\s*" + Provider.identifier +
"\\s*(,\\s*" +
Provider.type + "\\s*" + Provider.identifier +
")*") +
"?" +
"\\)\\s*") +
new Group("terminus", "[;{]");
System.Text.RegularExpressions.Regex regEx = new System.Text.RegularExpressions.Regex(regExPattern);
System.Text.RegularExpressions.Match match = regEx.Match(Input);
if (!match.Success)
throw new ParseException();
//if (match.Index != 0)
// throw new ParseException();
Input = Input.Remove(0, match.Index+match.Length); // Also removes all starting spaces etc...
Type = ITypeSpecifier.Parse(this, match.Groups["type"].Value);
if (Type == null)
throw new SyntaxException("Error parsing variable: Expected type, got \"" + match.Groups["type"].Value + "\".");
Identifier = match.Groups["identifier"].Value;
if ((Identifier == null) || (Identifier == ""))
throw new SyntaxException("Error parsing variable: Expected identifier, got \"" + match.Groups["identifier"].Value + "\".");
string[] paramStrings = match.Groups["params"].Value.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
List<VariableDeclaration> param = new List<VariableDeclaration>();
for (int i = 0; i < paramStrings.Length; i++)
{
paramStrings[i] = paramStrings[i].Trim(new char[] { ' ', '\t', '\n', '\r' });
try
{
VariableDeclaration decl = new VariableDeclaration(this, ref paramStrings[i], false);
param.Add(decl);
}
catch (ParseException)
{
}
}
Parameters = param.ToArray();
if (match.Groups["terminus"].Value == "{") // Well, there's a body...
{
//TODO: Parse body of function...
//Body = new ISyntaxNode[0];
List<ISyntaxNode> bodyNodes = new List<ISyntaxNode>();
System.Text.RegularExpressions.Regex endMatch = new System.Text.RegularExpressions.Regex("^\\s*}");
while (!endMatch.IsMatch(Input))
{
FunctionCall fcall = TryParse<FunctionCall>(this, ref Input);
if (fcall != null)
{
bodyNodes.Add(fcall);
// Search for following semikolon and remove it...
System.Text.RegularExpressions.Regex semikolon = new System.Text.RegularExpressions.Regex("^\\s*;");
System.Text.RegularExpressions.Match semikolonMatch = semikolon.Match(Input);
if (!semikolonMatch.Success)
throw new SyntaxException("Syntax error: Missing semikolon after function call.");
Input = Input.Remove(0, semikolonMatch.Length);
continue;
}
throw new SyntaxException("Syntax error: Invalid token \"" + Input + "\"");
}
Body = bodyNodes.ToArray();
// Finally remove remaining (closing) }
int index = Input.IndexOf('}');
Input = Input.Remove(0, index+1);
}
else if (match.Groups["terminus"].Value == ";") // No Body, only header declaration
Body = null;
}
