func roundFloat64(x exact.Value) exact.Value {
f, _ := exact.Float64Val(x)
if !math.IsInf(f, 0) {
return exact.MakeFloat64(f)
}
return nil
}
func roundFloat32(x exact.Value) exact.Value {
f32, _ := exact.Float32Val(x)
f := float64(f32)
if !math.IsInf(f, 0) {
return exact.MakeFloat64(f)
}
return nil
}
func (r *Rule) evaluate(d float64) (bool, error) {
pkg := types.NewPackage("evaluateme", "evaluateme")
v := exact.MakeFloat64(d)
pkg.Scope().Insert(types.NewConst(0, pkg, "x", types.Typ[types.Float64], v))
tv, err := types.Eval(token.NewFileSet(), pkg, token.NoPos, r.Condition)
if err != nil {
return false, fmt.Errorf("Failed to evaluate condition %q: %s", r.Condition, err)
}
if tv.Type.String() != "untyped bool" {
return false, fmt.Errorf("Rule \"%v\" does not return boolean type.", r.Condition)
}
return exact.BoolVal(tv.Value), nil
}