tree 5fe3e5023c506aa82a9b4dc21942192d6937541f
parent de7313b557a34d156f85c4ec973595568b65ec9c
author Herbie Ong <herbie@google.com> 1547782307 -0800
committer Herbie Ong <herbie@google.com> 1547834063 +0000

internal/encoding/text: format using 32 bitsize when encoding float32

When encoding/textpb marshals out float32 values, it was previously
formatting it as float64 bitsize since both float types are stored as
float64 and internal/encoding/text only has one Float type.  A
consequence of this is that the output may display a different value
than expected, e.g.  1.02 becomes 1.0199999809265137.

This CL splits Float type into Float32 and Float64 to keep track of
which bitsize to use when formatting.  Values of both types are still
stored as float64 to keep the logic simple.

Decoding will always use Float64, but users can ask for a float32 value
from it.

Change-Id: Iea5b14b283fec2236a0c3946fac34d4d79b95274
Reviewed-on: https://go-review.googlesource.com/c/158497
Reviewed-by: Damien Neil <dneil@google.com>