public Bpl.Expr FromUnion(Bpl.IToken tok, Bpl.Type boogieType, Bpl.Expr expr, bool isStruct) {
if (boogieType == UnionType || boogieType == RefType)
return expr;
Bpl.Function conversion = null;
if (boogieType == Bpl.Type.Bool)
conversion = this.Union2Bool;
else if (boogieType == Bpl.Type.Int)
conversion = this.Union2Int;
else if (boogieType == RealType)
conversion = this.Union2Real;
else
throw new InvalidOperationException(String.Format("Unknown Boogie type: '{0}'", boogieType.ToString()));
var callExpr = new Bpl.NAryExpr(
tok,
new Bpl.FunctionCall(conversion),
new List<Bpl.Expr>(new Bpl.Expr[] {expr})
);
callExpr.Type = boogieType;
return callExpr;
}
public Bpl.Expr ToUnion(Bpl.IToken tok, Bpl.Type boogieType, Bpl.Expr expr, bool isStruct, Bpl.StmtListBuilder builder)
{
if (boogieType == UnionType || boogieType == RefType)
return expr;
Bpl.Expr callConversion;
if (boogieType == Bpl.Type.Bool)
{
callConversion = new Bpl.NAryExpr(tok, new Bpl.FunctionCall(this.Bool2Union), new List<Bpl.Expr>(new Bpl.Expr[] {expr}));
builder.Add(
new Bpl.AssumeCmd(tok,
Bpl.Expr.Binary(Bpl.BinaryOperator.Opcode.Eq,
new Bpl.NAryExpr(tok, new Bpl.FunctionCall(this.Union2Bool), new List<Bpl.Expr>(new Bpl.Expr[] { callConversion })),
expr)));
}
else if (boogieType == Bpl.Type.Int)
{
callConversion = new Bpl.NAryExpr(tok, new Bpl.FunctionCall(this.Int2Union), new List<Bpl.Expr>(new Bpl.Expr[] { expr }));
builder.Add(
new Bpl.AssumeCmd(tok,
Bpl.Expr.Binary(Bpl.BinaryOperator.Opcode.Eq,
new Bpl.NAryExpr(tok, new Bpl.FunctionCall(this.Union2Int), new List<Bpl.Expr>(new Bpl.Expr[] {callConversion})),
expr)));
}
else if (boogieType == RealType)
{
callConversion = new Bpl.NAryExpr(tok, new Bpl.FunctionCall(this.Real2Union), new List<Bpl.Expr>(new Bpl.Expr[] { expr }));
builder.Add(
new Bpl.AssumeCmd(tok,
Bpl.Expr.Binary(Bpl.BinaryOperator.Opcode.Eq,
new Bpl.NAryExpr(tok, new Bpl.FunctionCall(this.Union2Real), new List<Bpl.Expr>(new Bpl.Expr[] { callConversion })),
expr)));
}
else
{
throw new InvalidOperationException(String.Format("Unknown Boogie type: '{0}'", boogieType.ToString()));
}
return callConversion;
}
