void StructuredCmd(out StructuredCmd/*!*/ ec) {
Contract.Ensures(Contract.ValueAtReturn(out ec) != null); ec = dummyStructuredCmd; Contract.Assume(cce.IsPeerConsistent(ec));
IfCmd/*!*/ ifcmd; WhileCmd/*!*/ wcmd; BreakCmd/*!*/ bcmd;
if (la.kind == 41) {
IfCmd(out ifcmd);
ec = ifcmd;
} else if (la.kind == 43) {
WhileCmd(out wcmd);
ec = wcmd;
} else if (la.kind == 46) {
BreakCmd(out bcmd);
ec = bcmd;
} else SynErr(107);
}
public Parser(Scanner/*!*/ scanner, Errors/*!*/ errors, bool disambiguation)
: this(scanner, errors)
{
// initialize readonly fields
Pgm = new Program();
dummyExpr = new LiteralExpr(Token.NoToken, false);
dummyCmd = new AssumeCmd(Token.NoToken, dummyExpr);
dummyBlock = new Block(Token.NoToken, "dummyBlock", new List<Cmd>(), new ReturnCmd(Token.NoToken));
dummyType = new BasicType(Token.NoToken, SimpleType.Bool);
dummyExprSeq = new List<Expr> ();
dummyTransferCmd = new ReturnCmd(Token.NoToken);
dummyStructuredCmd = new BreakCmd(Token.NoToken, null);
}
private static Bpl.StmtList BuildStmtList(Bpl.StructuredCmd cmd)
{
Bpl.StmtListBuilder builder = new Bpl.StmtListBuilder();
builder.Add(cmd);
return(builder.Collect(cmd.tok));
}
public BigBlock(IToken tok, string labelName, [Captured] List<Cmd> simpleCmds, StructuredCmd ec, TransferCmd tc)
{
Contract.Requires(simpleCmds != null);
Contract.Requires(tok != null);
Contract.Requires(ec == null || tc == null);
this.tok = tok;
this.LabelName = labelName;
this.Anonymous = labelName == null;
this.simpleCmds = simpleCmds;
this.ec = ec;
this.tc = tc;
}
private void ComputeAllLabels(StructuredCmd cmd)
{
if (cmd == null) return;
if (cmd is IfCmd) {
IfCmd ifCmd = (IfCmd)cmd;
ComputeAllLabels(ifCmd.thn);
ComputeAllLabels(ifCmd.elseIf);
ComputeAllLabels(ifCmd.elseBlock);
}
else if (cmd is WhileCmd) {
WhileCmd whileCmd = (WhileCmd)cmd;
ComputeAllLabels(whileCmd.Body);
}
}
void Dump(StructuredCmd scmd, TransferCmd tcmd)
{
Contract.Requires(scmd == null || tcmd == null);
Contract.Ensures(label == null && simpleCmds == null);
if (label == null && simpleCmds == null && scmd == null && tcmd == null) {
// nothing to do
} else {
if (simpleCmds == null) {
simpleCmds = new List<Cmd>();
}
bigBlocks.Add(new BigBlock(Token.NoToken, label, simpleCmds, scmd, tcmd));
label = null;
simpleCmds = null;
}
}
public void Add(StructuredCmd scmd)
{
Contract.Requires(scmd != null);
Dump(scmd, null);
}