[ty] AST garbage collection (#18482)
## 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.
This commit is contained in:
Ibraheem Ahmed
@@ -7,14 +7,17 @@ input_file: crates/ruff_python_parser/resources/valid/statement/assignment.py
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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..729,
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body: [
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Assign(
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StmtAssign {
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node_index: AtomicNodeIndex(..),
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range: 0..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: 0..1,
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id: Name("x"),
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ctx: Store,
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@@ -23,10 +26,12 @@ Module(
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],
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value: Tuple(
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ExprTuple {
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node_index: AtomicNodeIndex(..),
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range: 4..13,
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elts: [
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 5..6,
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value: Int(
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1,
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@@ -35,6 +40,7 @@ Module(
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),
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 8..9,
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value: Int(
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2,
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@@ -43,6 +49,7 @@ Module(
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),
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 11..12,
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value: Int(
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3,
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@@ -58,14 +65,17 @@ Module(
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),
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Assign(
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StmtAssign {
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node_index: AtomicNodeIndex(..),
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range: 15..33,
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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: 15..21,
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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: 16..17,
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id: Name("x"),
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ctx: Store,
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@@ -73,6 +83,7 @@ Module(
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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: 19..20,
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id: Name("y"),
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ctx: Store,
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@@ -86,10 +97,12 @@ Module(
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],
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value: Tuple(
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ExprTuple {
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node_index: AtomicNodeIndex(..),
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range: 24..33,
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elts: [
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 25..26,
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value: Int(
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1,
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@@ -98,6 +111,7 @@ Module(
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),
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 28..29,
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value: Int(
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2,
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@@ -106,6 +120,7 @@ Module(
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),
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 31..32,
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value: Int(
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3,
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@@ -121,14 +136,17 @@ Module(
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),
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Assign(
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StmtAssign {
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node_index: AtomicNodeIndex(..),
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range: 35..53,
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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: 35..41,
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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: 36..37,
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id: Name("x"),
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ctx: Store,
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@@ -136,6 +154,7 @@ Module(
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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("y"),
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ctx: Store,
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@@ -148,10 +167,12 @@ Module(
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],
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value: Tuple(
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ExprTuple {
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node_index: AtomicNodeIndex(..),
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range: 44..53,
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elts: [
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 45..46,
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value: Int(
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1,
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@@ -160,6 +181,7 @@ Module(
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),
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 48..49,
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value: Int(
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2,
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@@ -168,6 +190,7 @@ Module(
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),
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 51..52,
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value: Int(
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3,
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@@ -183,13 +206,16 @@ Module(
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),
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Assign(
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StmtAssign {
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node_index: AtomicNodeIndex(..),
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range: 55..70,
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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: 55..58,
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value: Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 55..56,
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id: Name("x"),
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ctx: Load,
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@@ -198,6 +224,7 @@ Module(
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attr: Identifier {
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id: Name("y"),
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range: 57..58,
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node_index: AtomicNodeIndex(..),
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},
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ctx: Store,
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},
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@@ -205,10 +232,12 @@ Module(
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],
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value: Tuple(
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ExprTuple {
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node_index: AtomicNodeIndex(..),
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range: 61..70,
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elts: [
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 62..63,
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value: Int(
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1,
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@@ -217,6 +246,7 @@ Module(
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),
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 65..66,
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value: Int(
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2,
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@@ -225,6 +255,7 @@ Module(
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),
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 68..69,
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value: Int(
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3,
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),
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Assign(
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StmtAssign {
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node_index: AtomicNodeIndex(..),
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range: 72..88,
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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: 72..76,
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value: Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 72..73,
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id: Name("x"),
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ctx: Load,
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@@ -254,6 +288,7 @@ Module(
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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: 74..75,
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id: Name("y"),
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ctx: Load,
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@@ -265,10 +300,12 @@ Module(
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],
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value: Tuple(
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ExprTuple {
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node_index: AtomicNodeIndex(..),
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range: 79..88,
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elts: [
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 80..81,
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value: Int(
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1,
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@@ -277,6 +314,7 @@ Module(
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),
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 83..84,
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value: Int(
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2,
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@@ -285,6 +323,7 @@ Module(
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),
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 86..87,
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value: Int(
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3,
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@@ -300,14 +339,17 @@ Module(
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),
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Assign(
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StmtAssign {
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node_index: AtomicNodeIndex(..),
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range: 90..109,
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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: 90..97,
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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: 91..92,
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id: Name("x"),
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ctx: Store,
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@@ -315,9 +357,11 @@ Module(
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),
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Starred(
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ExprStarred {
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node_index: AtomicNodeIndex(..),
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range: 94..96,
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value: Name(
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ExprName {
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node_index: AtomicNodeIndex(..),
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range: 95..96,
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id: Name("y"),
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ctx: Store,
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],
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value: Tuple(
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ExprTuple {
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node_index: AtomicNodeIndex(..),
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range: 100..109,
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elts: [
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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range: 101..102,
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value: Int(
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1,
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),
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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value: Int(
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),
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NumberLiteral(
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ExprNumberLiteral {
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node_index: AtomicNodeIndex(..),
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value: Int(
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3,
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Assign(
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StmtAssign {
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node_index: AtomicNodeIndex(..),
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targets: [
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List(
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ExprList {
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elts: [
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Name(
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ExprName {
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id: Name("x"),
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ctx: Store,
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),
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Name(
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ExprName {
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Name(
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ExprName {
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],
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value: List(
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elts: [
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Name(
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Name(
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1,
|
||||
@@ -608,6 +689,7 @@ Module(
|
||||
upper: Some(
|
||||
NumberLiteral(
|
||||
ExprNumberLiteral {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 424..425,
|
||||
value: Int(
|
||||
2,
|
||||
@@ -624,10 +706,12 @@ Module(
|
||||
],
|
||||
value: List(
|
||||
ExprList {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 429..433,
|
||||
elts: [
|
||||
NumberLiteral(
|
||||
ExprNumberLiteral {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 430..432,
|
||||
value: Int(
|
||||
42,
|
||||
@@ -642,13 +726,16 @@ Module(
|
||||
),
|
||||
Assign(
|
||||
StmtAssign {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 529..542,
|
||||
targets: [
|
||||
Subscript(
|
||||
ExprSubscript {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 529..535,
|
||||
value: NumberLiteral(
|
||||
ExprNumberLiteral {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 529..530,
|
||||
value: Int(
|
||||
5,
|
||||
@@ -657,10 +744,12 @@ Module(
|
||||
),
|
||||
slice: Slice(
|
||||
ExprSlice {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 531..534,
|
||||
lower: Some(
|
||||
NumberLiteral(
|
||||
ExprNumberLiteral {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 531..532,
|
||||
value: Int(
|
||||
1,
|
||||
@@ -671,6 +760,7 @@ Module(
|
||||
upper: Some(
|
||||
NumberLiteral(
|
||||
ExprNumberLiteral {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 533..534,
|
||||
value: Int(
|
||||
2,
|
||||
@@ -687,10 +777,12 @@ Module(
|
||||
],
|
||||
value: List(
|
||||
ExprList {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 538..542,
|
||||
elts: [
|
||||
NumberLiteral(
|
||||
ExprNumberLiteral {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 539..541,
|
||||
value: Int(
|
||||
42,
|
||||
@@ -705,13 +797,16 @@ Module(
|
||||
),
|
||||
Assign(
|
||||
StmtAssign {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 544..556,
|
||||
targets: [
|
||||
Attribute(
|
||||
ExprAttribute {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 544..551,
|
||||
value: Name(
|
||||
ExprName {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 544..547,
|
||||
id: Name("foo"),
|
||||
ctx: Load,
|
||||
@@ -720,6 +815,7 @@ Module(
|
||||
attr: Identifier {
|
||||
id: Name("bar"),
|
||||
range: 548..551,
|
||||
node_index: AtomicNodeIndex(..),
|
||||
},
|
||||
ctx: Store,
|
||||
},
|
||||
@@ -727,6 +823,7 @@ Module(
|
||||
],
|
||||
value: NumberLiteral(
|
||||
ExprNumberLiteral {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 554..556,
|
||||
value: Int(
|
||||
42,
|
||||
@@ -737,18 +834,22 @@ Module(
|
||||
),
|
||||
Assign(
|
||||
StmtAssign {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 658..670,
|
||||
targets: [
|
||||
Attribute(
|
||||
ExprAttribute {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 658..665,
|
||||
value: StringLiteral(
|
||||
ExprStringLiteral {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 658..663,
|
||||
value: StringLiteralValue {
|
||||
inner: Single(
|
||||
StringLiteral {
|
||||
range: 658..663,
|
||||
node_index: AtomicNodeIndex(..),
|
||||
value: "foo",
|
||||
flags: StringLiteralFlags {
|
||||
quote_style: Double,
|
||||
@@ -763,6 +864,7 @@ Module(
|
||||
attr: Identifier {
|
||||
id: Name("y"),
|
||||
range: 664..665,
|
||||
node_index: AtomicNodeIndex(..),
|
||||
},
|
||||
ctx: Store,
|
||||
},
|
||||
@@ -770,6 +872,7 @@ Module(
|
||||
],
|
||||
value: NumberLiteral(
|
||||
ExprNumberLiteral {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 668..670,
|
||||
value: Int(
|
||||
42,
|
||||
@@ -780,10 +883,12 @@ Module(
|
||||
),
|
||||
Assign(
|
||||
StmtAssign {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 672..680,
|
||||
targets: [
|
||||
Name(
|
||||
ExprName {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 672..675,
|
||||
id: Name("foo"),
|
||||
ctx: Store,
|
||||
@@ -792,6 +897,7 @@ Module(
|
||||
],
|
||||
value: NumberLiteral(
|
||||
ExprNumberLiteral {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 678..680,
|
||||
value: Int(
|
||||
42,
|
||||
@@ -802,10 +908,12 @@ Module(
|
||||
),
|
||||
Assign(
|
||||
StmtAssign {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 682..695,
|
||||
targets: [
|
||||
List(
|
||||
ExprList {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 682..684,
|
||||
elts: [],
|
||||
ctx: Store,
|
||||
@@ -814,13 +922,16 @@ Module(
|
||||
],
|
||||
value: Tuple(
|
||||
ExprTuple {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 687..695,
|
||||
elts: [
|
||||
Starred(
|
||||
ExprStarred {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 688..693,
|
||||
value: Name(
|
||||
ExprName {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 689..693,
|
||||
id: Name("data"),
|
||||
ctx: Load,
|
||||
@@ -838,10 +949,12 @@ Module(
|
||||
),
|
||||
Assign(
|
||||
StmtAssign {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 696..709,
|
||||
targets: [
|
||||
Tuple(
|
||||
ExprTuple {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 696..698,
|
||||
elts: [],
|
||||
ctx: Store,
|
||||
@@ -851,13 +964,16 @@ Module(
|
||||
],
|
||||
value: Tuple(
|
||||
ExprTuple {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 701..709,
|
||||
elts: [
|
||||
Starred(
|
||||
ExprStarred {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 702..707,
|
||||
value: Name(
|
||||
ExprName {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 703..707,
|
||||
id: Name("data"),
|
||||
ctx: Load,
|
||||
@@ -875,14 +991,17 @@ Module(
|
||||
),
|
||||
Assign(
|
||||
StmtAssign {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 710..719,
|
||||
targets: [
|
||||
Tuple(
|
||||
ExprTuple {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 710..714,
|
||||
elts: [
|
||||
Name(
|
||||
ExprName {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 710..711,
|
||||
id: Name("a"),
|
||||
ctx: Store,
|
||||
@@ -890,6 +1009,7 @@ Module(
|
||||
),
|
||||
Name(
|
||||
ExprName {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 713..714,
|
||||
id: Name("b"),
|
||||
ctx: Store,
|
||||
@@ -903,6 +1023,7 @@ Module(
|
||||
],
|
||||
value: Name(
|
||||
ExprName {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 717..719,
|
||||
id: Name("ab"),
|
||||
ctx: Load,
|
||||
@@ -912,10 +1033,12 @@ Module(
|
||||
),
|
||||
Assign(
|
||||
StmtAssign {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 720..729,
|
||||
targets: [
|
||||
Name(
|
||||
ExprName {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 720..721,
|
||||
id: Name("a"),
|
||||
ctx: Store,
|
||||
@@ -923,6 +1046,7 @@ Module(
|
||||
),
|
||||
Name(
|
||||
ExprName {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 724..725,
|
||||
id: Name("b"),
|
||||
ctx: Store,
|
||||
@@ -931,6 +1055,7 @@ Module(
|
||||
],
|
||||
value: Name(
|
||||
ExprName {
|
||||
node_index: AtomicNodeIndex(..),
|
||||
range: 728..729,
|
||||
id: Name("c"),
|
||||
ctx: Load,
|
||||
|
||||
Reference in New Issue
Block a user