public VariableDeclaration(ISyntaxNode parent, ref string Input, bool allowAssignment)
: base(parent)
{
// string regExPattern = "(?<def>(?<signdness>signed|unsigned)?\\s*(?<type>(void|char|short|int|long|float|double))(?<pointer>[\\s\\*]+)(?<identifier>[a-zA-Z_][a-zA-Z_0-9]*)\\s*(=\\s*(?<assignment>.*))?);(?<rest>.*)";
Pattern regExPattern =
"^\\s*" +
new Group("def",
"(" +
new Group("signedness", "signed|unsigned") +
"\\s+" +
")?" +
new Group("type", Provider.type) +
new Group("pointer", "[\\s\\*]+") +
new Group("identifier", Provider.identifier) +
"\\s*(" +
"=\\s*" +
new Group("assignment", ".*") +
")?") +
";";
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...
// Load signedness
if (match.Groups["signedness"].Success)
{
this.Signedness = (Signedness)Enum.Parse(typeof(Signedness), match.Groups["signedness"].Value, true);
}
else
{
this.Signedness = this.DefaultSignedness;
}
// Load type
Type = ITypeSpecifier.Parse(this, match.Groups["type"].Value);
if (Type == null)
{
throw new SyntaxException("Error parsing variable: Expected type, got \"" + match.Groups["type"].Value + "\".");
}
// Load identifier
Identifier = match.Groups["identifier"].Value;
if ((match.Groups["identifier"].Success) && ((Identifier == null) || (Identifier == "")))
{
throw new SyntaxException("Error parsing variable: Expected identifier, got \"" + match.Groups["identifier"].Value + "\".");
}
// And last but not least possible assignments
if (allowAssignment)
{
Assignment = match.Groups["assignment"].Value;
if ((match.Groups["assignment"].Success) && ((Assignment == null) || (Assignment == "")))
{
throw new SyntaxException("Error parsing variable: Expected assignment, got \"" + match.Groups["assignment"].Value + "\".");
}
}
else if (match.Groups["assignment"].Success)
{
throw new SyntaxException("Error parsing variable: Assignment is not allowed here.");
}
}
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;
}
}