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Robert Griesemer cfa93ba51f math/big: add support for underscores '_' in numbers 
The primary change is in nat.scan which now accepts underscores for base 0.
While at it, streamlined error handling in that function as well.
Also, improved the corresponding test significantly by checking the
expected result values also in case of scan errors.

The second major change is in scanExponent which now accepts underscores when
the new sepOk argument is set. While at it, essentially rewrote that
function to match error and underscore handling of nat.scan more closely.
Added a new test for scanExponent which until now was only tested
indirectly.

Finally, updated the documentation for several functions and added many
new test cases to clients of nat.scan.

A major portion of this CL is due to much better test coverage.

Updates #28493.

Change-Id: I7f17b361b633fbe6c798619d891bd5e0a045b5c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/166157
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
 		2019-03-12 22:58:58 +00:00
..
big math/big: add support for underscores '_' in numbers 2019-03-12 22:58:58 +00:00
bits math/bits: optimize Reverse32 and Reverse64 2019-02-26 17:52:08 +00:00
cmplx math/cmplx: avoid panic in Pow(x, NaN()) 2019-02-27 14:01:03 +00:00
rand math/rand: improve package documentation 2018-08-03 23:08:42 +00:00
abs.go cmd/compile,math: improve code generation for math.Abs 2017-08-25 19:15:01 +00:00
acos_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
acosh.go math: use SIMD to accelerate additional scalar math functions on s390x 2017-05-08 19:52:30 +00:00
acosh_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
all_test.go math: fix ternary correction statement in Log1p 2019-01-07 18:57:45 +00:00
arith_s390x.go math: use SIMD to accelerate additional scalar math functions on s390x 2017-05-08 19:52:30 +00:00
arith_s390x_test.go math: use SIMD to accelerate additional scalar math functions on s390x 2017-05-08 19:52:30 +00:00
asin.go
…
asin_386.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
asin_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
asin_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
asin_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
asin_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
asinh.go math: use SIMD to accelerate additional scalar math functions on s390x 2017-05-08 19:52:30 +00:00
asinh_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
asinh_stub.s math: use SIMD to accelerate additional scalar math functions on s390x 2017-05-08 19:52:30 +00:00
atan.go
…
atan2.go
…
atan2_386.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
atan2_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
atan2_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
atan2_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
atan2_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
atan_386.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
atan_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
atan_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
atan_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
atan_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
atanh.go math: use SIMD to accelerate additional scalar math functions on s390x 2017-05-08 19:52:30 +00:00
atanh_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
bits.go math: add RoundToEven function 2017-10-24 22:33:09 +00:00
cbrt.go math: use SIMD to accelerate additional scalar math functions on s390x 2017-05-08 19:52:30 +00:00
cbrt_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
cbrt_stub.s math: use SIMD to accelerate additional scalar math functions on s390x 2017-05-08 19:52:30 +00:00
const.go math: change oeis.org urls to https 2017-08-08 08:56:40 +00:00
copysign.go
…
cosh_s390x.s cmd/asm, math: add s390x floating point test instructions 2018-04-03 16:08:04 +00:00
dim.go math: remove asm version of Dim 2017-11-30 21:00:33 +00:00
dim_386.s math: remove asm version of Dim 2017-11-30 21:00:33 +00:00
dim_amd64.s math: remove asm version of Dim 2017-11-30 21:00:33 +00:00
dim_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
dim_arm.s math: remove asm version of Dim 2017-11-30 21:00:33 +00:00
dim_arm64.s math: remove asm version of Dim 2017-11-30 21:00:33 +00:00
dim_s390x.s math: optimize dim and remove s390x assembly implementation 2017-10-30 19:05:51 +00:00
erf.go math: use SIMD to accelerate additional scalar math functions on s390x 2017-05-08 19:52:30 +00:00
erf_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
erf_stub.s math: use SIMD to accelerate additional scalar math functions on s390x 2017-05-08 19:52:30 +00:00
erfc_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
erfinv.go all: update comment URLs from HTTP to HTTPS, where possible 2018-06-01 21:52:00 +00:00
example_test.go math: add Round and RoundToEven examples 2018-08-28 05:22:41 +00:00
exp.go math: fix inaccurate result of Exp(1) 2017-08-17 09:01:27 +00:00
exp2_386.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
exp2_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
exp2_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
exp2_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
exp_386.s math: use portable Exp instead of 387 instructions on 386 2016-10-05 03:53:11 +00:00
exp_amd64.s all: update comment URLs from HTTP to HTTPS, where possible 2018-06-01 21:52:00 +00:00
exp_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
exp_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
exp_arm64.s math: optimize Exp and Exp2 on arm64 2018-03-27 19:55:02 +00:00
exp_asm.go math: implement fast path for Exp 2017-09-20 21:43:00 +00:00
exp_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
expm1.go all: unindent some big chunks of code 2017-08-18 06:59:48 +00:00
expm1_386.s all: this big patch remove whitespace from assembly files 2018-10-03 15:28:51 +00:00
expm1_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
expm1_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
expm1_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
expm1_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
export_s390x_test.go math: use SIMD to accelerate additional scalar math functions on s390x 2017-05-08 19:52:30 +00:00
export_test.go math: use constant rather than variable for exported test threshold 2018-12-13 06:33:18 +00:00
floor.go math: add RoundToEven function 2017-10-24 22:33:09 +00:00
floor_386.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
floor_amd64.s cmd/compile: intrinsify math.{Trunc/Ceil/Floor} on amd64 2017-10-31 19:30:54 +00:00
floor_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
floor_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
floor_arm64.s math: add some assembly implementations on ARM64 2016-09-27 23:52:12 +00:00
floor_ppc64x.s math, cmd/internal/obj/ppc64: improve floor, ceil, trunc with asm 2016-09-23 13:03:08 +00:00
floor_s390x.s math: optimize Ceil, Floor and Trunc on s390x 2016-08-26 17:27:13 +00:00
floor_wasm.s math, math/big: add wasm architecture 2018-05-08 13:29:22 +00:00
frexp.go
…
frexp_386.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
frexp_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
frexp_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
frexp_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
gamma.go math: speed up Gamma(+Inf) 2016-10-18 22:12:03 +00:00
huge_test.go math: don't run huge argument tests on s390x 2018-12-13 22:13:57 +00:00
hypot.go math: use Abs rather than if x < 0 { x = -x } 2018-02-13 20:12:23 +00:00
hypot_386.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
hypot_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
hypot_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
hypot_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
j0.go math: use Abs rather than if x < 0 { x = -x } 2018-02-13 20:12:23 +00:00
j1.go math: speed up bessel functions on AMD64 2016-08-31 14:45:29 +00:00
jn.go math: fix typos in Bessel function docs 2017-02-16 22:41:34 +00:00
ldexp.go math: fix Ldexp when result is below ldexp(2, -1075) 2018-03-29 23:14:13 +00:00
ldexp_386.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
ldexp_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
ldexp_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
ldexp_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
lgamma.go go/printer, gofmt: tuned table alignment for better results 2018-04-04 13:39:34 -07:00
log.go all: single space after period. 2016-03-02 00:13:47 +00:00
log1p.go math: fix ternary correction statement in Log1p 2019-01-07 18:57:45 +00:00
log1p_386.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
log1p_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
log1p_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
log1p_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
log1p_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
log10.go
…
log10_386.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
log10_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
log10_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
log10_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
log10_s390x.s cmd/asm, math: add s390x floating point test instructions 2018-04-03 16:08:04 +00:00
log_386.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
log_amd64.s math: speed up Log on amd64 2017-03-29 20:36:29 +00:00
log_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
log_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
log_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
logb.go
…
mod.go math: use Abs in Mod rather than if x < 0 { x = -x} 2018-10-04 17:32:44 +00:00
mod_386.s
…
mod_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
mod_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
mod_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
modf.go all: single space after period. 2016-03-02 00:13:47 +00:00
modf_386.s all: fix assembly vet issues 2016-08-25 18:52:31 +00:00
modf_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
modf_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
modf_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
modf_arm64.s all: minor vet fixes 2016-10-24 17:27:37 +00:00
modf_ppc64x.s math: implement asm modf for ppc64x 2017-11-02 13:24:32 +00:00
nextafter.go
…
pow.go math: use Abs in Pow rather than if x < 0 { x = -x } 2018-10-04 17:33:04 +00:00
pow10.go math: speed up and improve accuracy of Pow10 2017-02-22 19:17:04 +00:00
pow_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
pow_stub.s math: use SIMD to accelerate additional scalar math functions on s390x 2017-05-08 19:52:30 +00:00
remainder.go all: single space after period. 2016-03-02 00:13:47 +00:00
remainder_386.s
…
remainder_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
remainder_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
remainder_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
signbit.go all: use "reports whether" consistently in the few places that didn't 2018-11-02 22:47:58 +00:00
sin.go src, misc: apply gofmt 2019-02-19 20:38:28 +00:00
sin_386.s math: implement trignometric range reduction for huge arguments 2018-12-13 06:01:42 +00:00
sin_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
sin_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
sin_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
sin_s390x.s cmd/asm, math: add s390x floating point test instructions 2018-04-03 16:08:04 +00:00
sincos.go src, misc: apply gofmt 2019-02-19 20:38:28 +00:00
sinh.go math,net: omit explicit true tag expr in switch 2018-08-20 22:15:59 +00:00
sinh_s390x.s cmd/asm, math: add s390x floating point test instructions 2018-04-03 16:08:04 +00:00
sinh_stub.s math: use SIMD to accelerate some scalar math functions on s390x 2016-11-11 20:20:23 +00:00
sqrt.go math: delete unused function sqrtC 2016-03-03 02:29:09 +00:00
sqrt_386.s all: this big patch remove whitespace from assembly files 2018-10-03 15:28:51 +00:00
sqrt_amd64.s math: make sqrt smaller on AMD64 2016-09-29 15:56:52 +00:00
sqrt_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
sqrt_arm.s all: this big patch remove whitespace from assembly files 2018-10-03 15:28:51 +00:00
sqrt_arm64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
sqrt_mipsx.s runtime/cgo, math: don't use FP instructions for soft-float mips{,le} 2017-11-30 17:12:32 +00:00
sqrt_ppc64x.s all: make copyright headers consistent with one space after period 2016-05-02 13:43:18 +00:00
sqrt_s390x.s math: add functions and stubs for s390x 2016-04-06 23:35:56 +00:00
sqrt_wasm.s math, math/big: add wasm architecture 2018-05-08 13:29:22 +00:00
stubs_arm64.s math: optimize Exp and Exp2 on arm64 2018-03-27 19:55:02 +00:00
stubs_mips64x.s math: remove asm version of Dim 2017-11-30 21:00:33 +00:00
stubs_mipsx.s math: remove asm version of Dim 2017-11-30 21:00:33 +00:00
stubs_ppc64x.s math: remove asm version of Dim 2017-11-30 21:00:33 +00:00
stubs_s390x.s math: remove asm version of Dim 2017-11-30 21:00:33 +00:00
stubs_wasm.s math, math/big: add wasm architecture 2018-05-08 13:29:22 +00:00
tan.go src, misc: apply gofmt 2019-02-19 20:38:28 +00:00
tan_386.s math: implement trignometric range reduction for huge arguments 2018-12-13 06:01:42 +00:00
tan_amd64.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
tan_amd64p32.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
tan_arm.s all: make copyright headers consistent with one space after period 2016-03-01 23:34:33 +00:00
tan_s390x.s math: use s390x mnemonics rather than binary encodings 2018-08-20 17:42:08 +00:00
tanh.go src, misc: apply gofmt 2019-02-19 20:38:28 +00:00
tanh_s390x.s cmd/asm, math: add s390x floating point test instructions 2018-04-03 16:08:04 +00:00
trig_reduce.go math: correct mPi4 comment 2018-12-13 20:35:45 +00:00
unsafe.go math: document sign bit correspondence for floating-point/bits conversions 2018-12-06 22:27:54 +00:00