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738 lines (666 loc) · 20.2 KB
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use ruff_text_size::Ranged;
use crate::visitor::source_order::SourceOrderVisitor;
use crate::{
self as ast, Alias, AnyNodeRef, AnyParameterRef, ArgOrKeyword, MatchCase, PatternKeyword,
};
impl ast::ElifElseClause {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::ElifElseClause {
range: _,
node_index: _,
test,
body,
..
} = self;
if let Some(test) = test {
visitor.visit_expr(test);
}
visitor.visit_body(body);
}
}
impl ast::ExprDict {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::ExprDict { items, .. } = self;
for ast::DictItem { key, value } in items {
if let Some(key) = key {
visitor.visit_expr(key);
}
visitor.visit_expr(value);
}
}
}
impl ast::ExprBoolOp {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::ExprBoolOp { op, values, .. } = self;
match values.as_slice() {
[left, rest @ ..] => {
visitor.visit_expr(left);
visitor.visit_bool_op(op);
for expr in rest {
visitor.visit_expr(expr);
}
}
[] => {
visitor.visit_bool_op(op);
}
}
}
}
impl ast::ExprCompare {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
visitor.visit_expr(self.first_operand());
for (_, op, right) in self.iter() {
visitor.visit_cmp_op(op);
visitor.visit_expr(right);
}
}
}
impl ast::InterpolatedStringFormatSpec {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
for element in &self.elements {
visitor.visit_interpolated_string_element(element);
}
}
}
impl ast::InterpolatedElement {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::InterpolatedElement {
expression,
format_spec,
..
} = self;
visitor.visit_expr(expression);
if let Some(format_spec) = format_spec {
for spec_part in &format_spec.elements {
visitor.visit_interpolated_string_element(spec_part);
}
}
}
}
impl ast::InterpolatedStringLiteralElement {
pub(crate) fn visit_source_order<'a, V>(&'a self, _visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::InterpolatedStringLiteralElement {
range: _,
node_index: _,
value: _,
} = self;
}
}
impl ast::ExprFString {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::ExprFString { value, .. } = self;
for f_string_part in value {
match f_string_part {
ast::FStringPartRef::Literal(string_literal) => {
visitor.visit_string_literal(string_literal);
}
ast::FStringPartRef::FString(f_string) => {
visitor.visit_f_string(f_string);
}
}
}
}
}
impl ast::ExprTString {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::ExprTString { value, .. } = self;
for t_string in value {
visitor.visit_t_string(t_string);
}
}
}
impl ast::ExprStringLiteral {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::ExprStringLiteral { value, .. } = self;
for string_literal in value {
visitor.visit_string_literal(string_literal);
}
}
}
impl ast::ExprBytesLiteral {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::ExprBytesLiteral { value, .. } = self;
for bytes_literal in value {
visitor.visit_bytes_literal(bytes_literal);
}
}
}
impl ast::ExceptHandlerExceptHandler {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::ExceptHandlerExceptHandler {
range: _,
node_index: _,
type_,
name,
body,
..
} = self;
if let Some(expr) = type_ {
visitor.visit_expr(expr);
}
if let Some(name) = name {
visitor.visit_identifier(name);
}
visitor.visit_body(body);
}
}
impl ast::PatternMatchMapping {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::PatternMatchMapping {
keys,
patterns,
rest,
..
} = self;
let mut rest = rest.as_ref();
for (key, pattern) in keys.iter().zip(patterns) {
if let Some(rest_identifier) = rest {
if rest_identifier.start() < key.start() {
visitor.visit_identifier(rest_identifier);
rest = None;
}
}
visitor.visit_expr(key);
visitor.visit_pattern(pattern);
}
if let Some(rest) = rest {
visitor.visit_identifier(rest);
}
}
}
impl ast::PatternArguments {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
for pattern_or_keyword in self.iter_source_order() {
match pattern_or_keyword {
crate::PatternOrKeyword::Pattern(pattern) => visitor.visit_pattern(pattern),
crate::PatternOrKeyword::Keyword(keyword) => {
visitor.visit_pattern_keyword(keyword);
}
}
}
}
}
impl ast::PatternKeyword {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let PatternKeyword {
range: _,
node_index: _,
attr,
pattern,
} = self;
visitor.visit_identifier(attr);
visitor.visit_pattern(pattern);
}
}
impl ast::Comprehension {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::Comprehension {
range: _,
node_index: _,
target,
iter,
ifs,
..
} = self;
visitor.visit_expr(target);
visitor.visit_expr(iter);
for expr in ifs {
visitor.visit_expr(expr);
}
}
}
impl ast::Arguments {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
for arg_or_keyword in self.iter_source_order() {
match arg_or_keyword {
ArgOrKeyword::Arg(arg) => visitor.visit_expr(arg),
ArgOrKeyword::Keyword(keyword) => visitor.visit_keyword(keyword),
}
}
}
}
impl ast::Parameters {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
for parameter in self.iter_source_order() {
match parameter {
AnyParameterRef::NonVariadic(parameter_with_default) => {
visitor.visit_parameter_with_default(parameter_with_default);
}
AnyParameterRef::Variadic(parameter) => visitor.visit_parameter(parameter),
}
}
}
}
impl ast::Parameter {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::Parameter {
range: _,
node_index: _,
name,
annotation,
..
} = self;
visitor.visit_identifier(name);
if let Some(expr) = annotation {
visitor.visit_annotation(expr);
}
}
}
impl ast::ParameterWithDefault {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::ParameterWithDefault {
range: _,
node_index: _,
parameter,
default,
} = self;
visitor.visit_parameter(parameter);
if let Some(expr) = default {
visitor.visit_expr(expr);
}
}
}
impl ast::Keyword {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::Keyword {
range: _,
node_index: _,
arg,
value,
} = self;
if let Some(arg) = arg {
visitor.visit_identifier(arg);
}
visitor.visit_expr(value);
}
}
impl Alias {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::Alias {
range: _,
node_index: _,
name,
asname,
} = self;
visitor.visit_identifier(name);
if let Some(asname) = asname {
visitor.visit_identifier(asname);
}
}
}
impl ast::WithItem {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::WithItem {
range: _,
node_index: _,
context_expr,
optional_vars,
} = self;
visitor.visit_expr(context_expr);
if let Some(expr) = optional_vars {
visitor.visit_expr(expr);
}
}
}
impl ast::MatchCase {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::MatchCase {
range: _,
node_index: _,
pattern,
guard,
body,
..
} = self;
visitor.visit_pattern(pattern);
if let Some(expr) = guard {
visitor.visit_expr(expr);
}
visitor.visit_body(body);
}
}
impl ast::Decorator {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::Decorator {
range: _,
node_index: _,
expression,
} = self;
visitor.visit_expr(expression);
}
}
impl ast::TypeParams {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::TypeParams {
range: _,
node_index: _,
type_params,
..
} = self;
for type_param in type_params {
visitor.visit_type_param(type_param);
}
}
}
impl ast::FString {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::FString {
elements,
range: _,
node_index: _,
flags: _,
} = self;
for fstring_element in elements {
visitor.visit_interpolated_string_element(fstring_element);
}
}
}
impl ast::TString {
pub(crate) fn visit_source_order<'a, V>(&'a self, visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::TString {
elements,
range: _,
node_index: _,
flags: _,
} = self;
for tstring_element in elements {
visitor.visit_interpolated_string_element(tstring_element);
}
}
}
impl ast::StringLiteral {
#[inline]
pub(crate) fn visit_source_order<'a, V>(&'a self, _visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::StringLiteral {
range: _,
node_index: _,
value: _,
flags: _,
} = self;
}
}
impl ast::BytesLiteral {
#[inline]
pub(crate) fn visit_source_order<'a, V>(&'a self, _visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::BytesLiteral {
range: _,
node_index: _,
value: _,
flags: _,
} = self;
}
}
impl ast::Identifier {
#[inline]
pub(crate) fn visit_source_order<'a, V>(&'a self, _visitor: &mut V)
where
V: SourceOrderVisitor<'a> + ?Sized,
{
let ast::Identifier {
range: _,
node_index: _,
id: _,
} = self;
}
}
impl<'a> AnyNodeRef<'a> {
/// Compares two any node refs by their pointers (referential equality).
pub fn ptr_eq(self, other: AnyNodeRef) -> bool {
self.as_ptr().eq(&other.as_ptr()) && self.kind() == other.kind()
}
/// In our AST, only some alternative branches are represented as a node. This has historical
/// reasons, e.g. we added a node for elif/else in if statements which was not originally
/// present in the parser.
pub const fn is_alternative_branch_with_node(self) -> bool {
matches!(
self,
AnyNodeRef::ExceptHandlerExceptHandler(_) | AnyNodeRef::ElifElseClause(_)
)
}
/// The last child of the last branch, if the node has multiple branches.
pub fn last_child_in_body(&self) -> Option<AnyNodeRef<'a>> {
let body =
match self {
AnyNodeRef::StmtFunctionDef(ast::StmtFunctionDef { body, .. })
| AnyNodeRef::StmtClassDef(ast::StmtClassDef { body, .. })
| AnyNodeRef::StmtWith(ast::StmtWith { body, .. })
| AnyNodeRef::MatchCase(MatchCase { body, .. })
| AnyNodeRef::ExceptHandlerExceptHandler(ast::ExceptHandlerExceptHandler {
body,
..
})
| AnyNodeRef::ElifElseClause(ast::ElifElseClause { body, .. }) => body,
AnyNodeRef::StmtIf(ast::StmtIf {
body,
elif_else_clauses,
..
}) => elif_else_clauses.last().map_or(body, |clause| &clause.body),
AnyNodeRef::StmtFor(ast::StmtFor { body, orelse, .. })
| AnyNodeRef::StmtWhile(ast::StmtWhile { body, orelse, .. }) => {
if orelse.is_empty() { body } else { orelse }
}
AnyNodeRef::StmtMatch(ast::StmtMatch { cases, .. }) => {
return cases.last().map(AnyNodeRef::from);
}
AnyNodeRef::StmtTry(ast::StmtTry {
body,
handlers,
orelse,
finalbody,
..
}) => {
if finalbody.is_empty() {
if orelse.is_empty() {
if handlers.is_empty() {
body
} else {
return handlers.last().map(AnyNodeRef::from);
}
} else {
orelse
}
} else {
finalbody
}
}
// Not a node that contains an indented child node.
_ => return None,
};
body.last().map(AnyNodeRef::from)
}
/// Check if the given statement is the first statement after the colon of a branch, be it in if
/// statements, for statements, after each part of a try-except-else-finally or function/class
/// definitions.
///
///
/// ```python
/// if True: <- has body
/// a <- first statement
/// b
/// elif b: <- has body
/// c <- first statement
/// d
/// else: <- has body
/// e <- first statement
/// f
///
/// class: <- has body
/// a: int <- first statement
/// b: int
///
/// ```
///
/// For nodes with multiple bodies, we check all bodies that don't have their own node. For
/// try-except-else-finally, each except branch has it's own node, so for the `StmtTry`, we check
/// the `try:`, `else:` and `finally:`, bodies, while `ExceptHandlerExceptHandler` has it's own
/// check. For for-else and while-else, we check both branches for the whole statement.
///
/// ```python
/// try: <- has body (a)
/// 6/8 <- first statement (a)
/// 1/0
/// except: <- has body (b)
/// a <- first statement (b)
/// b
/// else:
/// c <- first statement (a)
/// d
/// finally:
/// e <- first statement (a)
/// f
/// ```
pub fn is_first_statement_in_body(&self, body: AnyNodeRef) -> bool {
match body {
AnyNodeRef::StmtFor(ast::StmtFor { body, orelse, .. })
| AnyNodeRef::StmtWhile(ast::StmtWhile { body, orelse, .. }) => {
are_same_optional(*self, body.first()) || are_same_optional(*self, orelse.first())
}
AnyNodeRef::StmtTry(ast::StmtTry {
body,
orelse,
finalbody,
..
}) => {
are_same_optional(*self, body.first())
|| are_same_optional(*self, orelse.first())
|| are_same_optional(*self, finalbody.first())
}
AnyNodeRef::StmtIf(ast::StmtIf { body, .. })
| AnyNodeRef::ElifElseClause(ast::ElifElseClause { body, .. })
| AnyNodeRef::StmtWith(ast::StmtWith { body, .. })
| AnyNodeRef::ExceptHandlerExceptHandler(ast::ExceptHandlerExceptHandler {
body,
..
})
| AnyNodeRef::MatchCase(MatchCase { body, .. })
| AnyNodeRef::StmtFunctionDef(ast::StmtFunctionDef { body, .. })
| AnyNodeRef::StmtClassDef(ast::StmtClassDef { body, .. }) => {
are_same_optional(*self, body.first())
}
AnyNodeRef::StmtMatch(ast::StmtMatch { cases, .. }) => {
are_same_optional(*self, cases.first())
}
_ => false,
}
}
/// Returns `true` if `statement` is the first statement in an alternate `body` (e.g. the else of an if statement)
pub fn is_first_statement_in_alternate_body(&self, body: AnyNodeRef) -> bool {
match body {
AnyNodeRef::StmtFor(ast::StmtFor { orelse, .. })
| AnyNodeRef::StmtWhile(ast::StmtWhile { orelse, .. }) => {
are_same_optional(*self, orelse.first())
}
AnyNodeRef::StmtTry(ast::StmtTry {
handlers,
orelse,
finalbody,
..
}) => {
are_same_optional(*self, handlers.first())
|| are_same_optional(*self, orelse.first())
|| are_same_optional(*self, finalbody.first())
}
AnyNodeRef::StmtIf(ast::StmtIf {
elif_else_clauses, ..
}) => are_same_optional(*self, elif_else_clauses.first()),
_ => false,
}
}
}
/// Returns `true` if `right` is `Some` and `left` and `right` are referentially equal.
fn are_same_optional<'a, T>(left: AnyNodeRef, right: Option<T>) -> bool
where
T: Into<AnyNodeRef<'a>>,
{
right.is_some_and(|right| left.ptr_eq(right.into()))
}