func roundFloat64(x exact.Value) exact.Value {
f, _ := exact.Float64Val(x)
if !math.IsInf(f, 0) {
return exact.MakeFloat64(f)
}
return nil
}
// Uint64 returns the numeric value of this constant truncated to fit
// an unsigned 64-bit integer.
//
func (c *Const) Uint64() uint64 {
switch x := c.Value; x.Kind() {
case exact.Int:
if u, ok := exact.Uint64Val(x); ok {
return u
}
return 0
case exact.Float:
f, _ := exact.Float64Val(x)
return uint64(f)
}
panic(fmt.Sprintf("unexpected constant value: %T", c.Value))
}
// Complex128 returns the complex value of this constant truncated to
// fit a complex128.
//
func (c *Const) Complex128() complex128 {
re, _ := exact.Float64Val(exact.Real(c.Value))
im, _ := exact.Float64Val(exact.Imag(c.Value))
return complex(re, im)
}
// Float64 returns the numeric value of this constant truncated to fit
// a float64.
//
func (c *Const) Float64() float64 {
f, _ := exact.Float64Val(c.Value)
return f
}
func fitsFloat64(x exact.Value) bool {
f, _ := exact.Float64Val(x)
return !math.IsInf(f, 0)
}