ICallable

class pandas::ICallable

pandas C++ class.

Example

#include <pandas/pandas.h>
using namespace pandas;

// Use ICallable
ICallable obj;
// ... operations ...

Other Methods

Signature	Return Type	Location	Example
virtual ApplyCellResult invoke_cell(const MapCellInput&) const = 0	virtual ApplyCellResult	pd_callable_handle.h:62	View
virtual ApplyCellResult invoke_col(const ApplyColInput&) const	virtual ApplyCellResult	pd_callable_handle.h:73
virtual ApplyCellResult invoke_row(const ApplyRowInput&) const	virtual ApplyCellResult	pd_callable_handle.h:68
virtual DataFrame invoke_with_dataframe(const DataFrame&) const	virtual DataFrame	pd_callable_handle.h:84	View
virtual std::string repr() const = 0	virtual std::string	pd_callable_handle.h:57	View
throw_invoke_unsupported("invoke_row")		pd_callable_handle.h:69
throw_invoke_unsupported("invoke_col")		pd_callable_handle.h:74

Code Examples

The following examples are extracted from the test suite.

invoke_cell (pd_test_5_all.cpp:91860)

}

// --- f_test_24_dataframe_where_core_9.cpp ---

namespace f_test_24_dataframe_where_core_9_ns {

class IdentityCallable : public pandas::ICallable {
public:
    std::string repr() const override { return "IdentityCallable"; }

    pandas::ApplyCellResult invoke_cell(const pandas::MapCellInput&) const override {
        // Not used in where_resolved path; throw to make accidental use loud.
        throw pandas::ValueError("IdentityCallable: invoke_cell unsupported");
    }

    // The where dispatcher calls this entry — proof-test signature mirrors
    // plan C-24.2 Change C-24.2 ("cond.callable_ptr->invoke_with_dataframe(*this)").
    pandas::DataFrame invoke_with_dataframe(const pandas::DataFrame& df) const override {
        return df;
    }
};

invoke_with_dataframe (pd_test_5_all.cpp:91866)

class IdentityCallable : public pandas::ICallable {
public:
    std::string repr() const override { return "IdentityCallable"; }

    pandas::ApplyCellResult invoke_cell(const pandas::MapCellInput&) const override {
        // Not used in where_resolved path; throw to make accidental use loud.
        throw pandas::ValueError("IdentityCallable: invoke_cell unsupported");
    }

    // The where dispatcher calls this entry — proof-test signature mirrors
    // plan C-24.2 Change C-24.2 ("cond.callable_ptr->invoke_with_dataframe(*this)").
    pandas::DataFrame invoke_with_dataframe(const pandas::DataFrame& df) const override {
        return df;
    }
};

class AllTrueCallable : public pandas::ICallable {
public:
    std::string repr() const override { return "AllTrueCallable"; }

    pandas::ApplyCellResult invoke_cell(const pandas::MapCellInput&) const override {

repr (pd_test_1_all.cpp:10906)

    std::cout << " -> tests passed" << std::endl;
}

void pd_test_extension_index_repr() {
    std::cout << "========= repr =========================";

    pandas::CategoricalArray arr({"a", "b", "c"});
    // Use ExtensionIndex<CategoricalArray> directly to test base class repr
    pandas::ExtensionIndex<pandas::CategoricalArray> idx(arr, "test");

    std::string repr_str = idx.repr();

    bool passed = (!repr_str.empty() && repr_str.find("ExtensionIndex") != std::string::npos);
    if (!passed) {
        std::cout << "  [FAIL] : in pd_test_extension_index_repr() : repr check failed" << std::endl;
        throw std::runtime_error("pd_test_extension_index_repr failed");
    }

    std::cout << " -> tests passed" << std::endl;
}