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c9dff5c7d5
## Summary Garbage collect ASTs once we are done checking a given file. Queries with a cross-file dependency on the AST will reparse the file on demand. This reduces ty's peak memory usage by ~20-30%. The primary change of this PR is adding a `node_index` field to every AST node, that is assigned by the parser. `ParsedModule` can use this to create a flat index of AST nodes any time the file is parsed (or reparsed). This allows `AstNodeRef` to simply index into the current instance of the `ParsedModule`, instead of storing a pointer directly. The indices are somewhat hackily (using an atomic integer) assigned by the `parsed_module` query instead of by the parser directly. Assigning the indices in source-order in the (recursive) parser turns out to be difficult, and collecting the nodes during semantic indexing is impossible as `SemanticIndex` does not hold onto a specific `ParsedModuleRef`, which the pointers in the flat AST are tied to. This means that we have to do an extra AST traversal to assign and collect the nodes into a flat index, but the small performance impact (~3% on cold runs) seems worth it for the memory savings. Part of https://github.com/astral-sh/ty/issues/214.
341 lines
14 KiB
Text
341 lines
14 KiB
Text
---
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source: crates/ruff_python_parser/tests/fixtures.rs
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input_file: crates/ruff_python_parser/resources/valid/statement/delete.py
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---
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## AST
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```
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Module(
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ModModule {
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node_index: AtomicNodeIndex(..),
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range: 0..122,
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body: [
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Delete(
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StmtDelete {
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node_index: AtomicNodeIndex(..),
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range: 0..5,
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targets: [
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 4..5,
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id: Name("x"),
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ctx: Del,
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},
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),
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],
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},
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),
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Delete(
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StmtDelete {
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node_index: AtomicNodeIndex(..),
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range: 6..13,
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targets: [
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 11..12,
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id: Name("x"),
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ctx: Del,
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},
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),
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],
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},
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),
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Delete(
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StmtDelete {
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node_index: AtomicNodeIndex(..),
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range: 14..23,
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targets: [
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 18..19,
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id: Name("a"),
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ctx: Del,
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},
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),
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 21..22,
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id: Name("b"),
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ctx: Del,
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},
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),
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],
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},
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),
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Delete(
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StmtDelete {
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node_index: AtomicNodeIndex(..),
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range: 24..40,
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targets: [
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 28..29,
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id: Name("a"),
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ctx: Del,
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},
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),
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Tuple(
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ExprTuple {
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node_index: AtomicNodeIndex(..),
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range: 31..37,
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elts: [
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 32..33,
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id: Name("b"),
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ctx: Del,
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},
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),
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 35..36,
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id: Name("c"),
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ctx: Del,
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},
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),
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],
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ctx: Del,
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parenthesized: true,
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},
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),
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 39..40,
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id: Name("d"),
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ctx: Del,
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},
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),
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],
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},
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),
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Delete(
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StmtDelete {
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node_index: AtomicNodeIndex(..),
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range: 41..51,
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targets: [
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List(
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ExprList {
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node_index: AtomicNodeIndex(..),
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range: 45..51,
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elts: [
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 46..47,
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id: Name("a"),
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ctx: Del,
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},
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),
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 49..50,
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id: Name("b"),
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ctx: Del,
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},
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),
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],
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ctx: Del,
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},
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),
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],
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},
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),
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Delete(
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StmtDelete {
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node_index: AtomicNodeIndex(..),
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range: 52..70,
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targets: [
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List(
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ExprList {
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node_index: AtomicNodeIndex(..),
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range: 56..70,
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elts: [
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 57..58,
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id: Name("a"),
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ctx: Del,
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},
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),
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List(
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ExprList {
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node_index: AtomicNodeIndex(..),
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range: 60..66,
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elts: [
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 61..62,
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id: Name("b"),
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ctx: Del,
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},
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),
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 64..65,
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id: Name("c"),
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ctx: Del,
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},
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),
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],
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ctx: Del,
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},
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),
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 68..69,
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id: Name("d"),
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ctx: Del,
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},
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),
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],
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ctx: Del,
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},
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),
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],
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},
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),
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Delete(
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StmtDelete {
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node_index: AtomicNodeIndex(..),
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range: 71..78,
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targets: [
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Attribute(
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ExprAttribute {
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node_index: AtomicNodeIndex(..),
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range: 75..78,
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value: Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 75..76,
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id: Name("x"),
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ctx: Load,
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},
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),
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attr: Identifier {
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id: Name("y"),
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range: 77..78,
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node_index: AtomicNodeIndex(..),
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},
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ctx: Del,
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},
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),
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],
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},
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),
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Delete(
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StmtDelete {
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node_index: AtomicNodeIndex(..),
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range: 79..87,
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targets: [
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Subscript(
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ExprSubscript {
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node_index: AtomicNodeIndex(..),
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range: 83..87,
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value: Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 83..84,
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id: Name("x"),
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ctx: Load,
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},
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),
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slice: Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 85..86,
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id: Name("y"),
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ctx: Load,
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},
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),
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ctx: Del,
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},
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),
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],
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},
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),
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Delete(
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StmtDelete {
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node_index: AtomicNodeIndex(..),
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range: 88..121,
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targets: [
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Tuple(
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ExprTuple {
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node_index: AtomicNodeIndex(..),
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range: 92..121,
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elts: [
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Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 98..99,
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id: Name("x"),
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ctx: Del,
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},
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),
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Attribute(
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ExprAttribute {
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node_index: AtomicNodeIndex(..),
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range: 105..108,
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value: Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 105..106,
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id: Name("x"),
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ctx: Load,
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},
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),
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attr: Identifier {
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id: Name("y"),
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range: 107..108,
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node_index: AtomicNodeIndex(..),
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},
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ctx: Del,
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},
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),
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Subscript(
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ExprSubscript {
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node_index: AtomicNodeIndex(..),
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range: 114..118,
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value: Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 114..115,
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id: Name("x"),
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ctx: Load,
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},
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),
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slice: Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 116..117,
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id: Name("y"),
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ctx: Load,
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},
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),
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ctx: Del,
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},
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),
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],
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ctx: Del,
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parenthesized: true,
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},
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),
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],
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},
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),
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],
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},
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)
|
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```
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