private static bool MatchPredicateCmd(PredicateCmd cmd, PredicateCmd toMatch, out List <Tuple <Dictionary <Declaration, Expr>, Dictionary <string, IAppliable> > > substitutions)
{
var match = false;
substitutions = null;
if (!ExprMatchVisitor.AreAttributesASubset(toMatch.Attributes, cmd.Attributes))
{
return(match);
}
var mv = new ExprMatchVisitor(toMatch.Expr);
mv.VisitExpr(cmd.Expr);
if (mv.Matches)
{
match = true;
substitutions =
new List <Tuple <Dictionary <Declaration, Expr>, Dictionary <string, IAppliable> > >()
{
new Tuple <Dictionary <Declaration, Expr>, Dictionary <string, IAppliable> >(mv.Substitution, mv.FunctionSubstitution)
};
}
return(match);
}
private static bool MatchAssignCmd(AssignCmd cmd, AssignCmd toMatchCmd,
out List <Tuple <Dictionary <Declaration, Expr>, Dictionary <string, IAppliable> > > substitutions)
{
bool match = false;
var substitution = new Dictionary <Declaration, Expr>();
var funcSubstitution = new Dictionary <string, IAppliable>();
substitutions = null;
//CONVENTION: x := e matches x1, x2 := e1, e2; (the first match is taken, as usual)
// --> i.e., we treat a multi-assign as if it were several assignments for matching purposes
// but we make at most one insertion for a multi-assign --> TODO: revise
Debug.Assert(toMatchCmd.Lhss.Count == 1);
for (int i = 0; i < cmd.Lhss.Count; i++)
{
var lhs = cmd.Lhss[i].AsExpr;
var lEmv = new ExprMatchVisitor(toMatchCmd.Lhss[0].AsExpr);
lEmv.VisitExpr(lhs);
var rhs = cmd.Rhss[i];
var rEmv = new ExprMatchVisitor(toMatchCmd.Rhss[0]);
rEmv.VisitExpr(rhs);
if (lEmv.Matches && rEmv.Matches)
{
foreach (var kvp in lEmv.Substitution)
{
substitution.Add(kvp.Key, kvp.Value);
}
foreach (var kvp in lEmv.FunctionSubstitution)
{
funcSubstitution.Add(kvp.Key, kvp.Value);
}
foreach (var kvp in rEmv.Substitution)
{
substitution.Add(kvp.Key, kvp.Value);
}
foreach (var kvp in rEmv.FunctionSubstitution)
{
funcSubstitution.Add(kvp.Key, kvp.Value);
}
substitutions =
new List <Tuple <Dictionary <Declaration, Expr>, Dictionary <string, IAppliable> > >()
{
new Tuple <Dictionary <Declaration, Expr>, Dictionary <string, IAppliable> >(substitution, funcSubstitution)
};
match = true;
break;
}
}
return(match);
}
private bool MatchCallCmd(CallCmd cmd, CmdRule rule, CallCmd toMatch, out List <Tuple <Dictionary <Declaration, Expr>, Dictionary <string, IAppliable> > > substitutions)
{
// question: why do we have a list of substitutions, here?
// answer: the reason (right now) is AnyArgs: many arguments may match, the current semantics
// is that we want to make the insertion for every match (example: memory accesses)
substitutions = new List <Tuple <Dictionary <Declaration, Expr>, Dictionary <string, IAppliable> > >();
#region match procedure name
//if (toMatch.callee == BoogieKeyWords.AnyProcedure)
var matchCallee = rule.Prog.Procedures.FirstOrDefault(p => p.Name == toMatch.callee);
if (matchCallee != null)
{
// procedure is declared in TemplateVariables
if (matchCallee.HasAttribute(ExprMatchVisitor.BoogieKeyWords.NoImplementation))
{
var hasImpl = false;
_prog.Implementations
.Iter(i =>
{
if (i.Name == cmd.Proc.Name)
{
hasImpl = true;
}
});
//no match
if (hasImpl)
{
return(false);
}
}
}
else if (toMatch.callee == cmd.Proc.Name)
{
// procedure matches by name
}
else
{
//no match
return(false);
}
#endregion
#region match out parameters
//if (toMatch.Outs.Count == 1
// && toMatch.Outs[0].Name == BoogieKeyWords.AnyLhss)
//{
// //matches anything --> do nothing/go on
//}
//else
if (toMatch.Outs.Count == cmd.Outs.Count)
{
//TODO.. --> match, make substitution..
}
else
{
//TODO.. --> match, make substitution..
}
#endregion
#region match arguments
if (matchCallee != null && BoogieUtil.checkAttrExists(ExprMatchVisitor.BoogieKeyWords.AnyArgs, matchCallee.Attributes))
{
//var anyArgsExpr = (NAryExpr) toMatch.Ins[0];
var anyArgsExpr = toMatch.Ins[0];
var atLeastOneMatch = false;
foreach (var argCombo in cmd.Ins.Zip(cmd.Proc.InParams, Tuple.Create))
{
var cmdArg = argCombo.Item1;
var procArg = argCombo.Item2;
// also match param type and attribute
if (procArg.TypedIdent.Type.Equals(matchCallee.InParams[0].TypedIdent.Type) &&
ExprMatchVisitor.AreAttributesASubset(matchCallee.InParams[0].Attributes, procArg.Attributes))
{
var emv = new ExprMatchVisitor(anyArgsExpr);
emv.VisitExpr(cmdArg);
if (emv.Matches)
{
atLeastOneMatch = true;
substitutions.Add(
new Tuple <Dictionary <Declaration, Expr>, Dictionary <string, IAppliable> >(
emv.Substitution, emv.FunctionSubstitution));
}
}
}
if (!atLeastOneMatch)
{
return(false);
}
}
else
{
if (toMatch.Ins.Count != cmd.Ins.Count)
{
return(false);
}
for (var i = 0; i < cmd.Ins.Count; i++)
{
var arg = cmd.Ins[i];
var emv = new ExprMatchVisitor(toMatch.Ins[i]);
emv.VisitExpr(arg);
if (emv.Matches)
{
if (substitutions.Count == 0)
{
substitutions.Add(new Tuple <Dictionary <Declaration, Expr>, Dictionary <string, IAppliable> >(new Dictionary <Declaration, Expr>(), new Dictionary <string, IAppliable>()));
}
foreach (var kvp in emv.Substitution)
{
substitutions.First().Item1.Add(kvp.Key, kvp.Value);
}
foreach (var kvp in emv.FunctionSubstitution)
{
substitutions.First().Item2.Add(kvp.Key, kvp.Value);
}
}
else
{
return(false);
}
}
}
#endregion
return(true);
}
