public static bool GetSyntaxTree(Stream data, SyntaxTree <PreprocessorToken> tree, PreprocessorToken root = null)
{
while (!data.Eof())
{
char c = data.Peek();
switch ((TokenTypes)c)
{
case TokenTypes.IfDefined:
case TokenTypes.IfNotDefined:
case TokenTypes.If:
case TokenTypes.ElseIf:
{
ConditionToken token = new ConditionToken((TokenTypes)c);
token.Deserialize(data);
if (root == null)
{
tree.Add(token);
}
else
{
tree.AddAppend(root, token);
}
if (!GetSyntaxTree(data, tree, token))
{
return(false);
}
}
break;
case TokenTypes.Else:
{
PreprocessorToken token = new PreprocessorToken(TokenTypes.Else);
token.Deserialize(data);
if (root == null)
{
tree.Add(token);
}
else
{
tree.AddAppend(root, token);
}
if (!GetSyntaxTree(data, tree, token))
{
return(false);
}
}
break;
case TokenTypes.Define:
case TokenTypes.Undefine:
case TokenTypes.Include:
case TokenTypes.Error:
case TokenTypes.Pragma:
{
TextToken token = new TextToken((TokenTypes)c);
token.Deserialize(data);
if (root == null)
{
tree.Add(token);
}
else
{
tree.AddAppend(root, token);
}
}
break;
case TokenTypes.Text:
{
TextToken token = new TextToken();
token.Deserialize(data);
if (root == null)
{
tree.Add(token);
}
else
{
tree.AddAppend(root, token);
}
}
break;
default:
{
if (root != null && c == 0)
{
data.Get();
return(true);
}
else
{
return(ThrowError(new CodeProcessorContext(new CodeProcessorConfig()), PreprocessorCodes.UnexpectedCharacter));
}
}
}
}
return(true);
}