private StmtIf.StmtIfTrue ParseTruePart()
{
StmtIf.StmtIfTrue eistmt = new StmtIf.StmtIfTrue();
eistmt.KeyToken = tape.Current;
tape.MoveNext();//跳过否则如果
eistmt.Condition = ParseRawExpLine();
eistmt.Body = ParseStmtBlock(eistmt.KeyToken.Position);
return(eistmt);
}
private Stmt ParseIf()
{
StmtIf ifStmt = new StmtIf();
ifStmt.IfToken = tape.Current;
StmtIf.StmtIfTrue ifPart = ParseTruePart();
ifStmt.Parts.Add(ifPart);
while (tape.CurrentKind == TokenKind.ELSEIF)
{
StmtIf.StmtIfTrue elseifPart = ParseTruePart();
ifStmt.Parts.Add(elseifPart);
}
if (tape.CurrentKind == TokenKind.ELSE)
{
CodePosition pos = tape.Current.Position;
tape.MoveNext();
ifStmt.ElsePart = ParseStmtBlock(pos);
}
return(ifStmt);
}
