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Remove async AST node variants for with, for, and def (#6369)

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## Summary

Per the suggestion in
https://github.com/astral-sh/ruff/discussions/6183, this PR removes
`AsyncWith`, `AsyncFor`, and `AsyncFunctionDef`, replacing them with an
`is_async` field on the non-async variants of those structs. Unlike an
interpreter, we _generally_ have identical handling for these nodes, so
separating them into distinct variants adds complexity from which we
don't really benefit. This can be seen below, where we get to remove a
_ton_ of code related to adding generic `Any*` wrappers, and a ton of
duplicate branches for these cases.

## Test Plan

`cargo test` is unchanged, apart from parser snapshots.
This commit is contained in:
Charlie Marsh 2023-08-07 12:36:02 -04:00 • committed by GitHub
parent c895252aae
commit daefa74e9a
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91 changed files with 375 additions and 1478 deletions
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20
crates/ruff_python_parser/src/python.rs
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@ -1,5 +1,5 @@
// auto-generated: "lalrpop 0.20.0"
// sha3: f99d8cb29227bfbe1fa07719f655304a9a93fd4715726687ef40c091adbdbad5
// sha3: d713a7771107f8c20353ce5e890fba004b3c5491f513d28e9348a49cd510c59b
use num_bigint::BigInt;
use ruff_text_size::TextSize;
use ruff_python_ast::{self as ast, Ranged, MagicKind};
@ -33081,11 +33081,7 @@ fn __action147<
.end();
let target = Box::new(set_context(target, ast::ExprContext::Store));
let iter = Box::new(iter);
if is_async.is_some() {
ast::Stmt::AsyncFor(ast::StmtAsyncFor { target, iter, body, orelse, range: (location..end_location).into() })
} else {
ast::Stmt::For(ast::StmtFor { target, iter, body, orelse, range: (location..end_location).into() })
}
ast::Stmt::For(ast::StmtFor { target, iter, body, orelse, is_async: is_async.is_some(), range: (location..end_location).into() })
}
}
@ -33306,11 +33302,7 @@ fn __action155<
{
{
let end_location = body.last().unwrap().end();
if is_async.is_some() {
ast::StmtAsyncWith { items, body, range: (location..end_location).into() }.into()
} else {
ast::StmtWith { items, body, range: (location..end_location).into() }.into()
}
ast::StmtWith { items, body, is_async: is_async.is_some(), range: (location..end_location).into() }.into()
}
}
@ -33407,11 +33399,7 @@ fn __action161<
let args = Box::new(args);
let returns = r.map(Box::new);
let end_location = body.last().unwrap().end();
if is_async.is_some() {
ast::StmtAsyncFunctionDef { name, parameters:args, body, decorator_list, returns, type_params, range: (location..end_location).into() }.into()
} else {
ast::StmtFunctionDef { name, parameters:args, body, decorator_list, returns, type_params, range: (location..end_location).into() }.into()
}
ast::StmtFunctionDef { name, parameters:args, body, decorator_list, returns, type_params, is_async: is_async.is_some(), range: (location..end_location).into() }.into()
}
}