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[core] Add TColorNumber constructor from a C-style string #20271

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Merged
merged 1 commit into from
Nov 4, 2025
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[core] Add TColorNumber constructor from a C-style string #20271

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4 changes: 4 additions & 0 deletions core/base/inc/TColor.h
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Original file line number Diff line number Diff line change
Expand Up @@ -143,6 +143,10 @@ class TColorNumber {
public:
TColorNumber(Int_t color) : fNumber{color} {}
TColorNumber(std::string const &color);
// We also require an overload for C-style strings. That's because the
// TColorNumber is designed to be constructed implicitly, and C++ won't do
// two user-defined conversions in a single implicit conversion chain.
inline TColorNumber(const char *color) : TColorNumber{std::string{color}} {}
TColorNumber(std::array<Float_t, 3> rgb);
Int_t number() const { return fNumber; }

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