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| author | ringabout <43030857+ringabout@users.noreply.github.com> | 2023-05-17 06:21:34 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-05-17 00:21:34 +0200 |
| commit | f22e5067c5e0f375cb2263ec779d6e6ede108155 (patch) | |
| tree | e08e1480574a8b603b88d2ba8c7933c5beeb7c5b | |
| parent | eecf12c4b5fa8a011b1fc1991b554a31ca9a4a27 (diff) | |
| download | Nim-f22e5067c5e0f375cb2263ec779d6e6ede108155.tar.gz | |
fixes #21847; let `parseFloat` behave like `strtod` (#21854)
| -rw-r--r-- | lib/system/strmantle.nim | 4 | ||||
| -rw-r--r-- | tests/float/tfloat4.nim | 10 |
2 files changed, 11 insertions, 3 deletions
diff --git a/lib/system/strmantle.nim b/lib/system/strmantle.nim index ab158d6b7..60c63501c 100644 --- a/lib/system/strmantle.nim +++ b/lib/system/strmantle.nim @@ -178,7 +178,9 @@ proc nimParseBiggestFloat(s: openArray[char], number: var BiggestFloat, # if exponent greater than can be represented: +/- zero or infinity if absExponent > 999: - if expNegative: + if integer == 0: + number = 0.0 + elif expNegative: number = 0.0*sign else: number = Inf*sign diff --git a/tests/float/tfloat4.nim b/tests/float/tfloat4.nim index f6216c374..2bb61eb58 100644 --- a/tests/float/tfloat4.nim +++ b/tests/float/tfloat4.nim @@ -56,8 +56,14 @@ doAssert 0.9999999999999999 == ".9999999999999999".parseFloat # bug #18400 var s = [-13.888888'f32] -assert $s[0] == "-13.888888" +doAssert $s[0] == "-13.888888" var x = 1.23456789012345'f32 -assert $x == "1.2345679" +doAssert $x == "1.2345679" + +# bug #21847 +doAssert parseFloat"0e+42" == 0.0 +doAssert parseFloat"0e+42949672969" == 0.0 +doAssert parseFloat"0e+42949672970" == 0.0 +doAssert parseFloat"0e+42949623223346323563272970" == 0.0 echo("passed all tests.") |