diff options
| author | Robert Griesemer <gri@golang.org> | 2015-07-22 12:33:21 -0700 |
|---|---|---|
| committer | Robert Griesemer <gri@golang.org> | 2015-07-22 19:47:19 +0000 |
| commit | f35bc3ee87e1771891e2087363381bda616e67ee (patch) | |
| tree | 71f58944d5a5b7ad9e5577e3b9cbed944e4295f0 /src/math/big | |
| parent | 4a4eba9f37cde100584c7ee07c602d7b80e4e8f9 (diff) | |
| download | go-f35bc3ee87e1771891e2087363381bda616e67ee.tar.xz | |
math/big: document rounding for Rat.FloatToString
Fixes #11523.
Change-Id: I172f6facd555a1c6db76f25d5097343c20dea59a
Reviewed-on: https://go-review.googlesource.com/12507
Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
Diffstat (limited to 'src/math/big')
| -rw-r--r-- | src/math/big/ratconv.go | 3 | ||||
| -rw-r--r-- | src/math/big/ratconv_test.go | 2 |
2 files changed, 4 insertions, 1 deletions
diff --git a/src/math/big/ratconv.go b/src/math/big/ratconv.go index 778077b96e..961ff649a5 100644 --- a/src/math/big/ratconv.go +++ b/src/math/big/ratconv.go @@ -205,7 +205,8 @@ func (x *Rat) RatString() string { } // FloatString returns a string representation of x in decimal form with prec -// digits of precision after the decimal point and the last digit rounded. +// digits of precision after the decimal point. The last digit is rounded to +// nearest, with halves rounded away from zero. func (x *Rat) FloatString(prec int) string { if x.IsInt() { s := x.a.String() diff --git a/src/math/big/ratconv_test.go b/src/math/big/ratconv_test.go index 16b3a19418..da2fdab4ca 100644 --- a/src/math/big/ratconv_test.go +++ b/src/math/big/ratconv_test.go @@ -113,6 +113,8 @@ var floatStringTests = []struct { {"1", 0, "1"}, {"1", 2, "1.00"}, {"-1", 0, "-1"}, + {"0.05", 1, "0.1"}, + {"-0.05", 1, "-0.1"}, {".25", 2, "0.25"}, {".25", 1, "0.3"}, {".25", 3, "0.250"}, |