From f35a3df80c9df2c5bf2651746b2df047d356c8a4 Mon Sep 17 00:00:00 2001 From: Graham Miller Date: Mon, 6 Jun 2011 12:59:58 -0700 Subject: [PATCH] big: Rat always outputs the requested precision from FloatString Fixes #1922. R=golang-dev, gri CC=golang-dev https://golang.org/cl/4551098 --- src/pkg/big/rat.go | 6 +++++- src/pkg/big/rat_test.go | 5 +++-- 2 files changed, 8 insertions(+), 3 deletions(-) diff --git a/src/pkg/big/rat.go b/src/pkg/big/rat.go index f11c27425c..b2e93f2a45 100644 --- a/src/pkg/big/rat.go +++ b/src/pkg/big/rat.go @@ -314,7 +314,11 @@ func (z *Rat) RatString() string { // digits of precision after the decimal point and the last digit rounded. func (z *Rat) FloatString(prec int) string { if z.IsInt() { - return z.a.String() + s := z.a.String() + if prec > 0 { + s += "." + strings.Repeat("0", prec) + } + return s } q, r := nat{}.div(nat{}, z.a.abs, z.b) diff --git a/src/pkg/big/rat_test.go b/src/pkg/big/rat_test.go index ae5c7c9936..4effbf8eac 100644 --- a/src/pkg/big/rat_test.go +++ b/src/pkg/big/rat_test.go @@ -86,12 +86,13 @@ var floatStringTests = []struct { out string }{ {"0", 0, "0"}, - {"0", 4, "0"}, + {"0", 4, "0.0000"}, {"1", 0, "1"}, - {"1", 2, "1"}, + {"1", 2, "1.00"}, {"-1", 0, "-1"}, {".25", 2, "0.25"}, {".25", 1, "0.3"}, + {".25", 3, "0.250"}, {"-1/3", 3, "-0.333"}, {"-2/3", 4, "-0.6667"}, {"0.96", 1, "1.0"},