public static SyntaxNode Parse(CobaltParser parser)
{
if (parser.Match(TokenClass.IDENTIFIER, "if", TokenClass.OPEN_PARAN, "("))
{
Statement ret = new Statement();
parser.Match(TokenClass.IDENTIFIER, TokenClass.OPEN_PARAN, typeof(Expression),
TokenClass.CLOSE_PARAN, typeof(Statement));
return ret;
}
else if (parser.Match(TokenClass.IDENTIFIER, "while", TokenClass.OPEN_PARAN, "("))
{
Statement ret = new Statement();
parser.Match(TokenClass.IDENTIFIER, TokenClass.OPEN_PARAN, typeof(Expression),
TokenClass.CLOSE_PARAN, typeof(Statement));
return ret;
}
else if (parser.Match(TokenClass.IDENTIFIER, TokenClass.ASSIGN))
{
Statement stn = new Statement();
parser.Term(stn, typeof(Identifier), TokenClass.ASSIGN, typeof(Expression), TokenClass.SEMI_COLON);
return stn;
}
else if (parser.Match(TokenClass.OPEN_BRACKET))
{
CodeBlock block = new CodeBlock();
parser.ReadToken();
while (parser.PeekToken() != null && parser.PeekToken().Class != TokenClass.CLOSE_BRACKET)
block.AddLeave(Statement.Parse(parser));
parser.ReadToken();
return block;
}
return null;
}
private static void parse(CobaltParser parser, Statement parent)
{
parent.AddLeave(Parse(parser));
}