Add AsFloat functions to handle raw values

Author: RafaelCenzano

bson/raw_value.go

@@ -294,6 +294,14 @@ func (rv RawValue) AsInt64() int64 { return convertToCoreValue(rv).AsInt64() }
 // panicking.
 func (rv RawValue) AsInt64OK() (int64, bool) { return convertToCoreValue(rv).AsInt64OK() }
 
+// AsFloat64 returns a BSON number as a float64. If the BSON type is not a numeric one, this method
+// will panic.
+func (rv RawValue) AsFloat64() float64 { return convertToCoreValue(rv).AsFloat64() }
+
+// AsFloat64OK is the same as AsFloat64, except that it returns a boolean instead of
+// panicking.
+func (rv RawValue) AsFloat64OK() (float64, bool) { return convertToCoreValue(rv).AsFloat64OK() }
+
 // Decimal128 returns the decimal the Value represents. It panics if the value is a BSON type other than
 // decimal.
 func (rv RawValue) Decimal128() Decimal128 { return NewDecimal128(convertToCoreValue(rv).Decimal128()) }