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[interop] Pass template names and named constants as template arguments - #62

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conrade-ctc wants to merge 14 commits into
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chicagotrading:pr-c-template-args
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[interop] Pass template names and named constants as template arguments#62
conrade-ctc wants to merge 14 commits into
compiler-research:mainfrom
chicagotrading:pr-c-template-args

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A template argument can now name a template or a constant. A class or alias template name becomes a template-template argument. A constexpr variable or an enum constant becomes an expression, so Sema reads its value. true and false become bool values. The first commit fixes a separate bug: is_integral rejected a leading minus, so a negative literal became a type name.

The by-name paths need CppInterOp compiler-research/CppInterOp#1074, which resolves the name and exports a capability marker. cppjit probes for the marker and keeps the paths off when it is absent. The guarded test then skips.

aaronj0 and others added 13 commits August 25, 2026 15:17
…er-research#41)

* [cpyrt] Improve error reporting for method calls without C++ object

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* [test] Add test for method calls on an instance without a C++ object

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Grigori Rybkine <Grigori.Rybkine@cern.ch>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
…esearch#40)

* [cpyrt] Penalize void* arguments in overload priority as intended

* [test] Add regression test for void* overload priority

---------

Co-authored-by: Emery Conrad <emery.conrad@chicagotrading.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
…rch#42)

Fixes the long-standing header duplication (previously `Cppyy.h` and `cpp_cppyy.h`) between cpyrt and interop, so that there is only a single source of definitions for the `cppjit::interop` API and types.
Changed definition of a function to the test it is actually used, and added a missing import
…er-research#50)

Drops wheel sizes by about half. Previously the entire install tree of CppInterOp was staged that included duplicate shared libs due to versioning. This is fixed by adding a stripped shared-lib option in CppInterOp, leveraged in this patch.
…ch#52)

[cpyrt] Clear the error indicator only where a call failed

A debug build of CPython asserts when a C API call is made with the
error indicator already set, so the __cpp_cross__ annotation, the
meta_setattro fallthrough to tp_setattro, and the VectorData alias need
it cleared. Clear it only on the failing path: AddToClass reports
failure, and the two CPPScope sites can test the value they just
produced, so an error raised elsewhere still propagates.

meta_getattro returns a new reference; release it instead of leaking it.
* [test] Find eigen and boost under the Homebrew and MacPorts prefixes

* [ci] Build and test manylinux and macOS arm64 wheels
…esearch#54)

SetArg() created an element converter per call and appended it to
fConverters, but Clear() frees only fBuffer, so the vector grew without
bound across repeated std::initializer_list conversions. Create each
element converter once, on first use of its index, and reuse it.
…iler-research#51)

* Serialize and atomize test dictionary builds

* Force loadfile scheduling for distributed test runs

* Normalize the xfail marker keyword order

* Correct the xfail markers and add missing reasons

* Add the --run-crashing-xfails collection option

* Enable strict xfail

* Drop xfail markers that no longer fail on macOS and cling

* Make the span tests include their own header
is_integral rejects a leading minus, so the comma-split fallback in
AppendTypesSlow reads a negative literal as a type name. Accept the sign.

Co-developed-with-the-help-of: Claude Code (Opus 5, human in the loop)
A class or alias template name becomes a template-template argument. The
argument carries the name and a null type. A constexpr variable or an enum
constant goes through as its qualified name, so Sema builds an expression.
true and false become bool values.

The by-name paths need a CppInterOp that resolves the name. An older one
reads the name as an integer literal and instantiates a garbage value.
Probe for CppInterOp's SupportsNamedTemplateArguments export, and skip the
test when it is absent.

Co-developed-with-the-help-of: Claude Code (Fable 5, human in the loop)
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