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[WIP] Add error messages for unsupported macro features on compilation #3993

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[WIP] Add error messages for unsupported macro features on compilation #3993

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3a39f8c
First implementation
cojmeister Mar 23, 2024
5bb7425
Merge branch 'PyO3:main' into add-error-messages-for-unsupported-macr…
cojmeister Mar 25, 2024
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24 changes: 18 additions & 6 deletions pyo3-macros-backend/src/pyclass.rs
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@@ -1,10 +1,7 @@
use std::borrow::Cow;

use crate::attributes::kw::frozen;
use crate::attributes::{
self, kw, take_pyo3_options, CrateAttribute, ExtendsAttribute, FreelistAttribute,
ModuleAttribute, NameAttribute, NameLitStr, RenameAllAttribute,
};
use crate::attributes::{self, kw, take_pyo3_options, CrateAttribute, ExtendsAttribute, FreelistAttribute, ModuleAttribute, NameAttribute, NameLitStr, RenameAllAttribute, get_pyo3_options};
use crate::deprecations::Deprecations;
use crate::konst::{ConstAttributes, ConstSpec};
use crate::method::{FnArg, FnSpec};
Expand All @@ -13,7 +10,7 @@ use crate::pymethod::{
impl_py_getter_def, impl_py_setter_def, MethodAndMethodDef, MethodAndSlotDef, PropertyType,
SlotDef, __INT__, __REPR__, __RICHCMP__,
};
use crate::utils::Ctx;
use crate::utils::{Ctx, is_abi3};
use crate::utils::{self, apply_renaming_rule, PythonDoc};
use crate::PyFunctionOptions;
use proc_macro2::{Ident, Span, TokenStream};
Expand All @@ -22,6 +19,13 @@ use syn::ext::IdentExt;
use syn::parse::{Parse, ParseStream};
use syn::punctuated::Punctuated;
use syn::{parse_quote, spanned::Spanned, Result, Token};
use pyo3_build_config::PythonVersion;


const PY_3_9: PythonVersion = PythonVersion {
major: 3,
minor: 9,
};

/// If the class is derived from a Rust `struct` or `enum`.
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
Expand Down Expand Up @@ -162,6 +166,8 @@ impl PyClassPyO3Options {
};
}

let python_version = pyo3_build_config::get().version;

match option {
PyClassPyO3Option::Crate(krate) => set_option!(krate),
PyClassPyO3Option::Dict(dict) => set_option!(dict),
Expand All @@ -177,7 +183,13 @@ impl PyClassPyO3Options {
PyClassPyO3Option::SetAll(set_all) => set_option!(set_all),
PyClassPyO3Option::Subclass(subclass) => set_option!(subclass),
PyClassPyO3Option::Unsendable(unsendable) => set_option!(unsendable),
PyClassPyO3Option::Weakref(weakref) => set_option!(weakref),
PyClassPyO3Option::Weakref(weakref) => {
if is_abi3() && python_version >= PY_3_9 {
set_option!(weakref);
} else {
return Err(syn::Error::new((weakref.span()), "`weakref` not supported until python 3.9 or graeter",));
}
Comment on lines +187 to +191
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Suggested change
if is_abi3() && python_version >= PY_3_9 {
set_option!(weakref);
} else {
return Err(syn::Error::new((weakref.span()), "`weakref` not supported until python 3.9 or graeter",));
}
if python_version >= PY_3_9 || !is_abi3() {
set_option!(weakref);
} else {
return Err(syn::Error::new((weakref.span()), "`weakref` not supported with `abi3` until python 3.9 or graeter",));
}

},
}
Ok(())
}
Expand Down