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[mlir][py] Mark all type caster from_{cpp,python} methods as noexcept #143866

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Merged
merged 5 commits into from
Jul 15, 2025
Merged

[mlir][py] Mark all type caster from_{cpp,python} methods as noexcept #143866

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35d5b50
[mlir][py] Mark all type caster `from_{cpp,python}` methods as noexcept
nicholasjng Jun 12, 2025
d7beef9
refactor: Change `mlirApiObjectToCapsule` to return std::optional
nicholasjng Jul 10, 2025
db8e35c
refactor: Assign in if statements everywhere, adjust test expectations
nicholasjng Jul 10, 2025
88e8038
Relax conversions to `nanobind::try_cast`
nicholasjng Jul 11, 2025
3fe682e
Merge branch 'main' into constexpr-from-cpp
makslevental Jul 15, 2025
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29 changes: 15 additions & 14 deletions mlir/include/mlir/Bindings/Python/NanobindAdaptors.h
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Original file line number Diff line number Diff line change
Expand Up @@ -67,7 +67,7 @@ static nanobind::object mlirApiObjectToCapsule(nanobind::handle apiObject) {
template <>
struct type_caster<MlirAffineMap> {
NB_TYPE_CASTER(MlirAffineMap, const_name("MlirAffineMap"))
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) {
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) noexcept {
nanobind::object capsule = mlirApiObjectToCapsule(src);
value = mlirPythonCapsuleToAffineMap(capsule.ptr());
if (mlirAffineMapIsNull(value)) {
Expand All @@ -90,7 +90,7 @@ struct type_caster<MlirAffineMap> {
template <>
struct type_caster<MlirAttribute> {
NB_TYPE_CASTER(MlirAttribute, const_name("MlirAttribute"))
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) {
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) noexcept {
nanobind::object capsule = mlirApiObjectToCapsule(src);
value = mlirPythonCapsuleToAttribute(capsule.ptr());
return !mlirAttributeIsNull(value);
Expand All @@ -111,7 +111,7 @@ struct type_caster<MlirAttribute> {
template <>
struct type_caster<MlirBlock> {
NB_TYPE_CASTER(MlirBlock, const_name("MlirBlock"))
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) {
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) noexcept {
nanobind::object capsule = mlirApiObjectToCapsule(src);
value = mlirPythonCapsuleToBlock(capsule.ptr());
return !mlirBlockIsNull(value);
Expand All @@ -122,7 +122,7 @@ struct type_caster<MlirBlock> {
template <>
struct type_caster<MlirContext> {
NB_TYPE_CASTER(MlirContext, const_name("MlirContext"))
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) {
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) noexcept {
if (src.is_none()) {
// Gets the current thread-bound context.
// TODO: This raises an error of "No current context" currently.
Expand All @@ -142,7 +142,7 @@ struct type_caster<MlirContext> {
template <>
struct type_caster<MlirDialectRegistry> {
NB_TYPE_CASTER(MlirDialectRegistry, const_name("MlirDialectRegistry"))
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) {
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) noexcept {
nanobind::object capsule = mlirApiObjectToCapsule(src);
value = mlirPythonCapsuleToDialectRegistry(capsule.ptr());
return !mlirDialectRegistryIsNull(value);
Expand All @@ -162,7 +162,7 @@ struct type_caster<MlirDialectRegistry> {
template <>
struct type_caster<MlirLocation> {
NB_TYPE_CASTER(MlirLocation, const_name("MlirLocation"))
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) {
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) noexcept {
if (src.is_none()) {
// Gets the current thread-bound context.
src = nanobind::module_::import_(MAKE_MLIR_PYTHON_QUALNAME("ir"))
Expand All @@ -188,7 +188,7 @@ struct type_caster<MlirLocation> {
template <>
struct type_caster<MlirModule> {
NB_TYPE_CASTER(MlirModule, const_name("MlirModule"))
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) {
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) noexcept {
nanobind::object capsule = mlirApiObjectToCapsule(src);
value = mlirPythonCapsuleToModule(capsule.ptr());
return !mlirModuleIsNull(value);
Expand All @@ -209,12 +209,13 @@ template <>
struct type_caster<MlirFrozenRewritePatternSet> {
NB_TYPE_CASTER(MlirFrozenRewritePatternSet,
const_name("MlirFrozenRewritePatternSet"))
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) {
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) noexcept {
nanobind::object capsule = mlirApiObjectToCapsule(src);
value = mlirPythonCapsuleToFrozenRewritePatternSet(capsule.ptr());
return value.ptr != nullptr;
}
static handle from_cpp(MlirFrozenRewritePatternSet v, rv_policy, handle) {
static handle from_cpp(MlirFrozenRewritePatternSet v, rv_policy,
handle) noexcept {
nanobind::object capsule = nanobind::steal<nanobind::object>(
mlirPythonFrozenRewritePatternSetToCapsule(v));
return nanobind::module_::import_(MAKE_MLIR_PYTHON_QUALNAME("rewrite"))
Expand All @@ -228,7 +229,7 @@ struct type_caster<MlirFrozenRewritePatternSet> {
template <>
struct type_caster<MlirOperation> {
NB_TYPE_CASTER(MlirOperation, const_name("MlirOperation"))
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) {
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) noexcept {
nanobind::object capsule = mlirApiObjectToCapsule(src);
value = mlirPythonCapsuleToOperation(capsule.ptr());
return !mlirOperationIsNull(value);
Expand All @@ -250,7 +251,7 @@ struct type_caster<MlirOperation> {
template <>
struct type_caster<MlirValue> {
NB_TYPE_CASTER(MlirValue, const_name("MlirValue"))
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) {
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) noexcept {
nanobind::object capsule = mlirApiObjectToCapsule(src);
value = mlirPythonCapsuleToValue(capsule.ptr());
return !mlirValueIsNull(value);
Expand All @@ -273,7 +274,7 @@ struct type_caster<MlirValue> {
template <>
struct type_caster<MlirPassManager> {
NB_TYPE_CASTER(MlirPassManager, const_name("MlirPassManager"))
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) {
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) noexcept {
nanobind::object capsule = mlirApiObjectToCapsule(src);
value = mlirPythonCapsuleToPassManager(capsule.ptr());
return !mlirPassManagerIsNull(value);
Expand All @@ -284,7 +285,7 @@ struct type_caster<MlirPassManager> {
template <>
struct type_caster<MlirTypeID> {
NB_TYPE_CASTER(MlirTypeID, const_name("MlirTypeID"))
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) {
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) noexcept {
nanobind::object capsule = mlirApiObjectToCapsule(src);
value = mlirPythonCapsuleToTypeID(capsule.ptr());
return !mlirTypeIDIsNull(value);
Expand All @@ -306,7 +307,7 @@ struct type_caster<MlirTypeID> {
template <>
struct type_caster<MlirType> {
NB_TYPE_CASTER(MlirType, const_name("MlirType"))
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) {
bool from_python(handle src, uint8_t flags, cleanup_list *cleanup) noexcept {
nanobind::object capsule = mlirApiObjectToCapsule(src);
value = mlirPythonCapsuleToType(capsule.ptr());
return !mlirTypeIsNull(value);
Expand Down
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