/// <summary>
/// Return the string signature of an UpdateStmt
/// </summary>
/// <param name="us"></param>
/// <returns></returns>
public static string GetSignature(UpdateStmt us)
{
Contract.Requires <ArgumentNullException>(Tcce.NonNull(us));
Contract.Ensures(Contract.Result <string>() != null);
var er = us.Rhss[0] as ExprRhs;
Contract.Assert(er != null);
return(GetSignature(er.Expr as ApplySuffix));
}
private bool IsTacticCall(string name)
{
Contract.Requires(Tcce.NonNull(name));
if (name == null)
{
return(false);
}
return(Tactics.ContainsKey(name));
}
/// <summary>
/// Return Dafny key
/// </summary>
/// <param name="key">Variable name</param>
/// <returns>bool</returns>
/// <exception cref="KeyNotFoundException">Variable does not exist in the current context</exception>
public IVariable GetDafnyVar(string key)
{
Contract.Requires <ArgumentNullException>(Tcce.NonNull(key));
Contract.Ensures(Contract.Result <IVariable>() != null);
if (ContainDafnyVar(key))
{
return(_scope.Peek().GetDafnyVariableData(key).Variable);
}
throw new KeyNotFoundException($"Dafny variable {key} does not exist in the current context");
}
/// <summary>
/// Return the type of the key
/// </summary>
/// <param name="key">name of the key</param>
/// <returns>null if type is not known</returns>
/// <exception cref="KeyNotFoundException">Variable does not exist in the current context</exception>
public Dfy.Type GetDafnyVarType(string key)
{
Contract.Requires <ArgumentNullException>(Tcce.NonNull(key));
Contract.Ensures(Contract.Result <Dfy.Type>() != null);
if (ContainDafnyVar(key))
{
return(GetDafnyVar(key).Type);
}
throw new KeyNotFoundException($"Dafny variable {key} does not exist in the current context");
}
private TacnyDriver(Program program, ErrorReporterDelegate erd)
{
Contract.Requires(Tcce.NonNull(program));
// initialize state
GetTimer().Restart();
_state = new ProofState(program);
_errorReporterDelegate = erd;
_branches = new List <IEnumerable <ProofState> >();
_tacticCalls = 0;
}
private MemberDecl InterpretAndUnfoldTactic(MemberDecl target, Resolver r)
{
Contract.Requires(Tcce.NonNull(target));
// initialize new stack for variables
var frame = new Stack <Dictionary <IVariable, Type> >();
var method = target as Method;
if (method != null)
{
_state.SetTopLevelClass(method.EnclosingClass?.Name);
_state.TargetMethod = target;
var dict = method.Ins.Concat(method.Outs)
.ToDictionary <IVariable, IVariable, Type>(item => item, item => item.Type);
frame.Push(dict);
var preRes = GetResultList().Keys.Copy();
InterpertBlockStmt(method.Body, frame);
GenerateResultCode();
// sanity check
Contract.Assert(frame.Count == 0);
var newRets =
GetResultList().Where(kvp => !preRes.Contains(kvp.Key)).ToDictionary(i => i.Key, i => i.Value);
Contract.Assert(newRets.Count != 0);
var body = Util.InsertCode(_state, newRets);
method.Body.Body.Clear();
if (newRets.Count != 0 && body != null)
{
method.Body.Body.AddRange(body.Body);
}
// use the original resolver of the resoved program, as it contains all the necessary type info
method.CallsTactic = 0;
// set the current class in the resolver, so that it can refer to the memberdecl correctly
r.SetCurClass(method.EnclosingClass as ClassDecl);
//asssume the defualt module is the current module, this needs to be improved.
r.ResolveMethodBody(method, _state.GetDafnyProgram().DefaultModuleDef.Name);
//Console.WriteLine("Errors: " + _program.reporter.Count(ErrorLevel.Error));
}
return(method);
}
private void InterpretIfStmt(IfStmt ifStmt, Stack <Dictionary <IVariable, Type> > frame)
{
Contract.Requires(Tcce.NonNull(ifStmt));
//throw new NotImplementedException();
InterpertBlockStmt(ifStmt.Thn, frame);
if (ifStmt.Els == null)
{
return;
}
var els = ifStmt.Els as BlockStmt;
if (els != null)
{
InterpertBlockStmt(els, frame);
}
else if (ifStmt.Els is IfStmt)
{
InterpretIfStmt((IfStmt)ifStmt.Els, frame);
}
}
public static string GetSignature(ApplySuffix aps)
{
Contract.Requires <ArgumentNullException>(Tcce.NonNull(aps));
Contract.Ensures(Contract.Result <string>() != null);
return(aps?.Lhs.tok.val);
}
/// <summary>
/// Add new dafny stmt to the top frame
/// </summary>
/// <param name="stmtList"></param>
public void AddStatements(List <Statement> stmtList)
{
Contract.Requires <ArgumentNullException>(Tcce.NonNullElements(stmtList));
_scope.Peek().FrameCtrl.AddGeneratedCode(stmtList);
}
/// <summary>
/// Return the type of the key
/// </summary>
/// <param name="variable">key</param>
/// <returns>null if type is not known</returns>
/// <exception cref="KeyNotFoundException">Variable does not exist in the current context</exception>
public Dfy.Type GetDafnyVarType(IVariable variable)
{
Contract.Requires <ArgumentNullException>(Tcce.NonNull(variable));
Contract.Ensures(Contract.Result <Dfy.Type>() != null);
return(GetDafnyVarType(variable.Name));
}
/// <summary>
/// Return Dafny key
/// </summary>
/// <param name="key">Variable name</param>
/// <returns>bool</returns>
/// <exception cref="KeyNotFoundException">Variable does not exist in the current context</exception>
public IVariable GetDafnyVar(NameSegment key)
{
Contract.Requires <ArgumentNullException>(Tcce.NonNull(key));
Contract.Ensures(Contract.Result <IVariable>() != null);
return(GetDafnyVar(key.Name));
}
/// <summary>
/// Check if Dafny key exists in the current context
/// </summary>
/// <param name="key">Variable</param>
/// <returns>bool</returns>
public bool ContainDafnyVar(NameSegment key)
{
Contract.Requires <ArgumentNullException>(Tcce.NonNull(key));
return(ContainDafnyVar(key.Name));
}
/// <summary>
/// Check if Dafny key exists in the current context
/// </summary>
/// <param name="key">Variable name</param>
/// <returns>bool</returns>
public bool ContainDafnyVar(string key)
{
Contract.Requires <ArgumentNullException>(Tcce.NonNull(key));
return(_scope.Peek().ContainDafnyVar(key));
}
// Find tactic application and resolve it
private void InterpertBlockStmt(BlockStmt body, Stack <Dictionary <IVariable, Type> > frame)
{
Contract.Requires(Tcce.NonNull(body));
InterpertBlockStmt(body.Body, frame);
}
public static IEnumerable <ProofState> EvalTopLevelTactic(ProofState state, Dictionary <IVariable, Type> variables,
Statement tacticApplication, ApplySuffix aps, ErrorReporterDelegate errorDelegate, bool ifPartial)
{
Contract.Requires <ArgumentNullException>(Tcce.NonNull(variables));
Contract.Requires <ArgumentNullException>(Tcce.NonNull(tacticApplication));
Contract.Requires <ArgumentNullException>(state != null, "state");
Contract.Requires(tacticApplication == null ||
tacticApplication is UpdateStmt || tacticApplication is InlineTacticBlockStmt);
IEnumerable <ProofState> branches;
if (state.InitState(tacticApplication, aps, variables, ifPartial) == false)
{
return(null);
}
#if !TACNY_DEBUG
try {
#endif
if (state.GetErrHandler().Reporter.Count(ErrorLevel.Error) != 0)
{
var errs = CompoundErrorInformation.GenerateErrorInfoList(state);
if (errorDelegate != null)
{
foreach (var err in errs)
{
errorDelegate(err);
}
}
return(null);
}
branches = GenerateSolution(state, errorDelegate);
#if !TACNY_DEBUG
}
catch (Exception e) {
String msg;
List <CompoundErrorInformation> errs;
try {
msg = "Tactic unknown exception: " + e.Message;
errs = CompoundErrorInformation.GenerateErrorInfoList(state, msg);
} catch (Exception) {
msg = "Tactic exception";
errs = new List <CompoundErrorInformation>();
}
if (errorDelegate != null)
{
foreach (var err in errs)
{
errorDelegate(err);
}
}
return(null);
}
#endif
return(branches);
}