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App: [skip ci] reduce number of digits by 1 to display a NumberExpression

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See also: https://forum.freecadweb.org/viewtopic.php?f=3&t=44057
This commit is contained in:
wmayer
2020-03-11 10:31:28 +01:00
parent 00733f4f76
commit 338bf2ca3a
1 changed files with 8 additions and 1 deletions
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9
src/App/Expression.cpp
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@@ -1348,7 +1348,14 @@ void NumberExpression::negate()
void NumberExpression::_toString(std::ostream &ss, bool,int) const
{
ss << std::setprecision(std::numeric_limits<double>::digits10 + 2) << getValue();
// Restore the old implementation because using digits10 + 2 causes
// undesired side-effects:
// https://forum.freecadweb.org/viewtopic.php?f=3&t=44057&p=375882#p375882
// See also:
// https://en.cppreference.com/w/cpp/types/numeric_limits/digits10
// https://en.cppreference.com/w/cpp/types/numeric_limits/max_digits10
// https://www.boost.org/doc/libs/1_63_0/libs/multiprecision/doc/html/boost_multiprecision/tut/limits/constants.html
ss << std::setprecision(std::numeric_limits<double>::digits10 + 1) << getValue();
/* Trim of any extra spaces */
//while (s.size() > 0 && s[s.size() - 1] == ' ')