Details
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Bug
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Status: Closed (View Workflow)
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High
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Resolution: Fixed
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6.20/06
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- macOS 10.15.5
- Python 3.7.6 (Homebrew)
- Apple clang 11.0.3
Description
Conversion from std::shared_ptr<TGraph> to std::shared_ptr<const TGraph> works in C++.
#include <memory>
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#include "TGraph.h" |
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void foo(std::shared_ptr<const TGraph> gra) { |
gra->Dump();
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}
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void test() { |
auto graph = std::make_shared<TGraph>();
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foo(graph);
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}
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$ root
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root [0] .x test.C+ |
==> Dumping object at: 0x00007ffa37c785c8, name=, class=TGraph |
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fMaxSize 0 !Current dimension of arrays fX and fY |
(snip)
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But it doesn't in PyROOT.
import ROOT |
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ROOT.gInterpreter.Declare('void foo(shared_ptr<const TGraph> gra) {gra->Dump();}') |
ROOT.gROOT.ProcessLine('auto graph = std::make_shared<TGraph>();') |
ROOT.foo(ROOT.graph)
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In [1]: %run test.py --------------------------------------------------------------------------- TypeError Traceback (most recent call last) ~/test.py in <module> |
3 ROOT.gInterpreter.Declare('void foo(shared_ptr<const TGraph> gra) {gra->Dump();}') |
4 ROOT.gROOT.ProcessLine('auto graph = std::make_shared<TGraph>();') |
----> 5 ROOT.foo(ROOT.graph) |
6 |
7 |
TypeError: void ::foo(shared_ptr<const TGraph> gra) => |
could not convert argument 1 |
I remember it was working a while ago, when Wim advised me to use gInterpreter.ProcessLine in this thread.
https://root-forum.cern.ch/t/root-std-shared-ptr-in-python/35021