private static AstNode ParseGiven(TokenStream stream)
{
GivenStatement switchStmt = new GivenStatement (stream.Location);
stream.Expect (TokenClass.Keyword, "given");
stream.Expect (TokenClass.OpenParan);
switchStmt.Add (ParseExpression (stream));
stream.Expect (TokenClass.CloseParan);
stream.Expect (TokenClass.OpenBrace);
AstNode defaultBlock = new AstRoot (stream.Location);
AstRoot caseStatements = new AstRoot (stream.Location);
while (!stream.EndOfStream && !stream.Match (TokenClass.CloseBrace)) {
caseStatements.Add (ParseWhen (stream));
if (stream.Accept (TokenClass.Keyword, "default")) {
defaultBlock = ParseStatement (stream);
}
}
switchStmt.Add (caseStatements);
switchStmt.Add (defaultBlock);
stream.Expect (TokenClass.CloseBrace);
return switchStmt;
}
