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Merged
youknowone merged 3 commits into from
Jun 30, 2026
Merged

FutureFeature enum #8185

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a97f0fe
`FutureFeature` enum
ShaharNaveh Jun 28, 2026
b68f0e2
Use it in preprocess as well
ShaharNaveh Jun 28, 2026
1bb8fa9
clippy
ShaharNaveh Jun 28, 2026
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Use it in preprocess as well
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@ShaharNaveh
ShaharNaveh committed Jun 28, 2026
commit b68f0e2c2d1450b06414559219057bd3a5f1f089
48 changes: 31 additions & 17 deletions crates/codegen/src/preprocess.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,8 @@ use ruff_python_ast::{
visitor::transformer::{self, Transformer},
};
use ruff_text_size::{Ranged, TextRange};

use crate::compile::FutureFeature;
use rustpython_compiler_core::bytecode;

const MAXDIGITS: usize = 3;
Expand Down Expand Up @@ -232,30 +234,41 @@ pub fn checked_future_features_in_body(
..
}) if *level == 0 && module.as_ref().map(|id| id.as_str()) == Some("__future__") => {
for alias in names {
match alias.name.as_str() {
"nested_scopes" | "generators" | "division" | "absolute_import"
| "with_statement" | "print_function" | "unicode_literals"
| "generator_stop" => {}
"annotations" => {
future_features.insert(bytecode::CodeFlags::FUTURE_ANNOTATIONS);
}
// Accept the future feature name, but leave it
// as a RustPython no-op.
"barry_as_FLUFL" => {}
"braces" => {
return Err(FutureFeatureError {
let future_feature =
alias
.name
.as_str()
.try_into()
.map_err(|name| FutureFeatureError {
features: future_features,
range: alias.range,
kind: FutureFeatureErrorKind::InvalidBraces,
});
}
other => {
kind: FutureFeatureErrorKind::InvalidFeature(name),
})?;

match future_feature {
FutureFeature::Braces => {
return Err(FutureFeatureError {
features: future_features,
range: alias.range,
kind: FutureFeatureErrorKind::InvalidFeature(other.to_owned()),
kind: FutureFeatureErrorKind::InvalidBraces,
});
}
FutureFeature::Annotations => {
future_features.insert(bytecode::CodeFlags::FUTURE_ANNOTATIONS)
}
FutureFeature::BarryAsFLUFL => {
// We do not support Barry-as-BDFL parser mode yet. This is a nop for now.
}
FutureFeature::AbsoluteImport
| FutureFeature::Division
| FutureFeature::GeneratorStop
| FutureFeature::Generators
| FutureFeature::NestedScopes
| FutureFeature::PrintFunction
| FutureFeature::UnicodeLiterals
| FutureFeature::WithStatement => {
// Python 3 features. They are already implemented by default.
}
}
}
}
Expand Down Expand Up @@ -298,6 +311,7 @@ pub fn preprocess_mod(
}
}

#[derive(Clone, Copy, Debug, Eq, PartialEq)]
struct AstPreprocessor {
optimize: u8,
future_annotations: bool,
Expand Down
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