WString: unify numeric conversion and fix assignments #8526
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Restore the pre-3.0.0 behaviour when we could assign numeric values to the string object. After introducing `operator =(char)`, everything was converted to `char` instead of the expected 'stringification' of the number (built-in int, long, unsigned int, unsigned long, long long, unsigned long long, float and double)
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… decimalPlaces branch via if (base == 10) { sprintf(...) } else { ... } instead of separate funcs reuse the constructor for numeric types where it's possible nonstd arduino funcs expect this usage pattern
also -1 line
mcspr commented Mar 31, 2022
Comment on lines -67 to -77
| explicit String(unsigned char, unsigned char base = 10); | ||
| explicit String(int, unsigned char base = 10); | ||
| explicit String(unsigned int, unsigned char base = 10); | ||
| explicit String(long, unsigned char base = 10); | ||
| explicit String(unsigned long, unsigned char base = 10); | ||
| explicit String(long long /* base 10 */); | ||
| explicit String(long long, unsigned char base); | ||
| explicit String(unsigned long long /* base 10 */); | ||
| explicit String(unsigned long long, unsigned char base); | ||
| explicit String(float, unsigned char decimalPlaces = 2); | ||
| explicit String(double, unsigned char decimalPlaces = 2); |
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This one is mostly for verbosity. Due to the amount of magic ctors we have... we can't really have std::initializer_list<char> ctor as well, since everything would be converted into it
e.g.
String(std::initializer_list<char> data) { concat(data.begin(), data.size()); }So only purpose of the below is to allow to omit String{...} in front of the arguments list. Where we suppose to have explicit for String(int, base) overload
core/test_string.cpp:620:51: error: converting to ‘String’ from initializer list would use explicit constructor ‘String::String(int, unsigned char)’ 620 | String strings[] {{62, 10}, {63, 10}, {64, 10}}; | ^Could be reverted though.
d-a-v approved these changes Apr 4, 2022
hasenradball pushed a commit to hasenradball/Arduino that referenced this pull request Nov 18, 2024
Restore the pre-3.0.0 behaviour when we could assign numeric values to the string object. After introducing operator =(char), everything was converted to char instead of the expected 'stringification' of the number (built-in int, long, unsigned int, unsigned long, long long, unsigned long long, float and double) Add toString() that handles conversions, re-use it through out the class Fix esp8266#8430
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Restore the pre-3.0.0 behaviour when we could assign numeric values to
the string object. After introducing
operator =(char), everything wasconverted to
charinstead of the expected 'stringification' of thenumber (built-in int, long, unsigned int, unsigned long, long long,
unsigned long long, float and double)
Add
toString()that handles conversions, re-use it through out the classFix #8430