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Copy pathexpression.rs
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373 lines (327 loc) · 12.9 KB
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use std::iter::FusedIterator;
use ruff_text_size::{Ranged, TextRange};
use crate::{
self as ast, AnyNodeRef, AnyStringFlags, Expr, ExprBytesLiteral, ExprFString, ExprRef,
ExprStringLiteral, ExprTString, StringFlags,
};
impl<'a> From<&'a Box<Expr>> for ExprRef<'a> {
fn from(value: &'a Box<Expr>) -> Self {
ExprRef::from(value.as_ref())
}
}
/// Unowned pendant to all the literal variants of [`ast::Expr`] that stores a
/// reference instead of an owned value.
#[derive(Copy, Clone, Debug, PartialEq, is_macro::Is)]
pub enum LiteralExpressionRef<'a> {
StringLiteral(&'a ast::ExprStringLiteral),
BytesLiteral(&'a ast::ExprBytesLiteral),
NumberLiteral(&'a ast::ExprNumberLiteral),
BooleanLiteral(&'a ast::ExprBooleanLiteral),
NoneLiteral(&'a ast::ExprNoneLiteral),
EllipsisLiteral(&'a ast::ExprEllipsisLiteral),
}
impl Ranged for LiteralExpressionRef<'_> {
fn range(&self) -> TextRange {
match self {
LiteralExpressionRef::StringLiteral(expression) => expression.range(),
LiteralExpressionRef::BytesLiteral(expression) => expression.range(),
LiteralExpressionRef::NumberLiteral(expression) => expression.range(),
LiteralExpressionRef::BooleanLiteral(expression) => expression.range(),
LiteralExpressionRef::NoneLiteral(expression) => expression.range(),
LiteralExpressionRef::EllipsisLiteral(expression) => expression.range(),
}
}
}
impl<'a> From<LiteralExpressionRef<'a>> for AnyNodeRef<'a> {
fn from(value: LiteralExpressionRef<'a>) -> Self {
match value {
LiteralExpressionRef::StringLiteral(expression) => {
AnyNodeRef::ExprStringLiteral(expression)
}
LiteralExpressionRef::BytesLiteral(expression) => {
AnyNodeRef::ExprBytesLiteral(expression)
}
LiteralExpressionRef::NumberLiteral(expression) => {
AnyNodeRef::ExprNumberLiteral(expression)
}
LiteralExpressionRef::BooleanLiteral(expression) => {
AnyNodeRef::ExprBooleanLiteral(expression)
}
LiteralExpressionRef::NoneLiteral(expression) => {
AnyNodeRef::ExprNoneLiteral(expression)
}
LiteralExpressionRef::EllipsisLiteral(expression) => {
AnyNodeRef::ExprEllipsisLiteral(expression)
}
}
}
}
impl LiteralExpressionRef<'_> {
/// Returns `true` if the literal is either a string or bytes literal that
/// is implicitly concatenated.
pub fn is_implicit_concatenated(&self) -> bool {
match self {
LiteralExpressionRef::StringLiteral(expression) => {
expression.value.is_implicit_concatenated()
}
LiteralExpressionRef::BytesLiteral(expression) => {
expression.value.is_implicit_concatenated()
}
_ => false,
}
}
}
/// An enum that holds a reference to a string-like expression from the AST. This includes string
/// literals, bytes literals, f-strings, and t-strings.
#[derive(Copy, Clone, Debug, PartialEq)]
pub enum StringLike<'a> {
String(&'a ast::ExprStringLiteral),
Bytes(&'a ast::ExprBytesLiteral),
FString(&'a ast::ExprFString),
TString(&'a ast::ExprTString),
}
impl<'a> StringLike<'a> {
pub const fn is_interpolated_string(self) -> bool {
matches!(self, Self::TString(_) | Self::FString(_))
}
/// Returns an iterator over the [`StringLikePart`] contained in this string-like expression.
pub fn parts(&self) -> StringLikePartIter<'a> {
match self {
StringLike::String(expr) => StringLikePartIter::String(expr.value.iter()),
StringLike::Bytes(expr) => StringLikePartIter::Bytes(expr.value.iter()),
StringLike::FString(expr) => StringLikePartIter::FString(expr.value.iter()),
StringLike::TString(expr) => StringLikePartIter::TString(expr.value.iter()),
}
}
/// Returns `true` if the string is implicitly concatenated.
pub fn is_implicit_concatenated(self) -> bool {
match self {
Self::String(ExprStringLiteral { value, .. }) => value.is_implicit_concatenated(),
Self::Bytes(ExprBytesLiteral { value, .. }) => value.is_implicit_concatenated(),
Self::FString(ExprFString { value, .. }) => value.is_implicit_concatenated(),
Self::TString(ExprTString { value, .. }) => value.is_implicit_concatenated(),
}
}
pub const fn as_expression_ref(self) -> ExprRef<'a> {
match self {
StringLike::String(expr) => ExprRef::StringLiteral(expr),
StringLike::Bytes(expr) => ExprRef::BytesLiteral(expr),
StringLike::FString(expr) => ExprRef::FString(expr),
StringLike::TString(expr) => ExprRef::TString(expr),
}
}
}
impl<'a> From<&'a ast::ExprStringLiteral> for StringLike<'a> {
fn from(value: &'a ast::ExprStringLiteral) -> Self {
StringLike::String(value)
}
}
impl<'a> From<&'a ast::ExprBytesLiteral> for StringLike<'a> {
fn from(value: &'a ast::ExprBytesLiteral) -> Self {
StringLike::Bytes(value)
}
}
impl<'a> From<&'a ast::ExprFString> for StringLike<'a> {
fn from(value: &'a ast::ExprFString) -> Self {
StringLike::FString(value)
}
}
impl<'a> From<&'a ast::ExprTString> for StringLike<'a> {
fn from(value: &'a ast::ExprTString) -> Self {
StringLike::TString(value)
}
}
impl<'a> From<&StringLike<'a>> for ExprRef<'a> {
fn from(value: &StringLike<'a>) -> Self {
match value {
StringLike::String(expr) => ExprRef::StringLiteral(expr),
StringLike::Bytes(expr) => ExprRef::BytesLiteral(expr),
StringLike::FString(expr) => ExprRef::FString(expr),
StringLike::TString(expr) => ExprRef::TString(expr),
}
}
}
impl<'a> From<StringLike<'a>> for AnyNodeRef<'a> {
fn from(value: StringLike<'a>) -> Self {
AnyNodeRef::from(&value)
}
}
impl<'a> From<&StringLike<'a>> for AnyNodeRef<'a> {
fn from(value: &StringLike<'a>) -> Self {
match value {
StringLike::String(expr) => AnyNodeRef::ExprStringLiteral(expr),
StringLike::Bytes(expr) => AnyNodeRef::ExprBytesLiteral(expr),
StringLike::FString(expr) => AnyNodeRef::ExprFString(expr),
StringLike::TString(expr) => AnyNodeRef::ExprTString(expr),
}
}
}
impl<'a> TryFrom<&'a Expr> for StringLike<'a> {
type Error = ();
fn try_from(value: &'a Expr) -> Result<Self, Self::Error> {
match value {
Expr::StringLiteral(value) => Ok(Self::String(value)),
Expr::BytesLiteral(value) => Ok(Self::Bytes(value)),
Expr::FString(value) => Ok(Self::FString(value)),
Expr::TString(value) => Ok(Self::TString(value)),
_ => Err(()),
}
}
}
impl<'a> TryFrom<AnyNodeRef<'a>> for StringLike<'a> {
type Error = ();
fn try_from(value: AnyNodeRef<'a>) -> Result<Self, Self::Error> {
match value {
AnyNodeRef::ExprStringLiteral(value) => Ok(Self::String(value)),
AnyNodeRef::ExprBytesLiteral(value) => Ok(Self::Bytes(value)),
AnyNodeRef::ExprFString(value) => Ok(Self::FString(value)),
AnyNodeRef::ExprTString(value) => Ok(Self::TString(value)),
_ => Err(()),
}
}
}
impl Ranged for StringLike<'_> {
fn range(&self) -> TextRange {
match self {
StringLike::String(literal) => literal.range(),
StringLike::Bytes(literal) => literal.range(),
StringLike::FString(literal) => literal.range(),
StringLike::TString(literal) => literal.range(),
}
}
}
/// An enum that holds a reference to an individual part of a string-like expression.
#[derive(Copy, Clone, Debug, PartialEq)]
pub enum StringLikePart<'a> {
String(&'a ast::StringLiteral),
Bytes(&'a ast::BytesLiteral),
FString(&'a ast::FString),
TString(&'a ast::TString),
}
impl<'a> StringLikePart<'a> {
/// Returns the [`AnyStringFlags`] for the current string-like part.
pub fn flags(&self) -> AnyStringFlags {
match self {
StringLikePart::String(string) => AnyStringFlags::from(string.flags),
StringLikePart::Bytes(bytes) => AnyStringFlags::from(bytes.flags),
StringLikePart::FString(f_string) => AnyStringFlags::from(f_string.flags),
StringLikePart::TString(t_string) => AnyStringFlags::from(t_string.flags),
}
}
/// Returns the range of the string's content in the source (minus prefix and quotes).
pub fn content_range(self) -> TextRange {
let kind = self.flags();
TextRange::new(
self.start() + kind.opener_len(),
self.end() - kind.closer_len(),
)
}
pub const fn is_string_literal(self) -> bool {
matches!(self, Self::String(_))
}
pub const fn as_string_literal(self) -> Option<&'a ast::StringLiteral> {
match self {
StringLikePart::String(value) => Some(value),
_ => None,
}
}
pub const fn is_interpolated_string(self) -> bool {
matches!(self, Self::FString(_) | Self::TString(_))
}
}
impl<'a> From<&'a ast::StringLiteral> for StringLikePart<'a> {
fn from(value: &'a ast::StringLiteral) -> Self {
StringLikePart::String(value)
}
}
impl<'a> From<&'a ast::BytesLiteral> for StringLikePart<'a> {
fn from(value: &'a ast::BytesLiteral) -> Self {
StringLikePart::Bytes(value)
}
}
impl<'a> From<&'a ast::FString> for StringLikePart<'a> {
fn from(value: &'a ast::FString) -> Self {
StringLikePart::FString(value)
}
}
impl<'a> From<ast::FStringPartRef<'a>> for StringLikePart<'a> {
fn from(value: ast::FStringPartRef<'a>) -> Self {
match value {
ast::FStringPartRef::Literal(literal) => Self::String(literal),
ast::FStringPartRef::FString(fstring) => Self::FString(fstring),
}
}
}
impl<'a> From<&'a ast::TString> for StringLikePart<'a> {
fn from(value: &'a ast::TString) -> Self {
StringLikePart::TString(value)
}
}
impl<'a> From<&StringLikePart<'a>> for AnyNodeRef<'a> {
fn from(value: &StringLikePart<'a>) -> Self {
AnyNodeRef::from(*value)
}
}
impl<'a> From<StringLikePart<'a>> for AnyNodeRef<'a> {
fn from(value: StringLikePart<'a>) -> Self {
match value {
StringLikePart::String(part) => AnyNodeRef::StringLiteral(part),
StringLikePart::Bytes(part) => AnyNodeRef::BytesLiteral(part),
StringLikePart::FString(part) => AnyNodeRef::FString(part),
StringLikePart::TString(part) => AnyNodeRef::TString(part),
}
}
}
impl Ranged for StringLikePart<'_> {
fn range(&self) -> TextRange {
match self {
StringLikePart::String(part) => part.range(),
StringLikePart::Bytes(part) => part.range(),
StringLikePart::FString(part) => part.range(),
StringLikePart::TString(part) => part.range(),
}
}
}
/// An iterator over all the [`StringLikePart`] of a string-like expression.
///
/// This is created by the [`StringLike::parts`] method.
#[derive(Clone)]
pub enum StringLikePartIter<'a> {
String(std::slice::Iter<'a, ast::StringLiteral>),
Bytes(std::slice::Iter<'a, ast::BytesLiteral>),
FString(ast::FStringParts<'a>),
TString(std::slice::Iter<'a, ast::TString>),
}
impl<'a> Iterator for StringLikePartIter<'a> {
type Item = StringLikePart<'a>;
fn next(&mut self) -> Option<Self::Item> {
let part = match self {
StringLikePartIter::String(inner) => StringLikePart::String(inner.next()?),
StringLikePartIter::Bytes(inner) => StringLikePart::Bytes(inner.next()?),
StringLikePartIter::FString(inner) => inner.next()?.into(),
StringLikePartIter::TString(inner) => StringLikePart::TString(inner.next()?),
};
Some(part)
}
fn size_hint(&self) -> (usize, Option<usize>) {
match self {
StringLikePartIter::String(inner) => inner.size_hint(),
StringLikePartIter::Bytes(inner) => inner.size_hint(),
StringLikePartIter::FString(inner) => inner.size_hint(),
StringLikePartIter::TString(inner) => inner.size_hint(),
}
}
}
impl DoubleEndedIterator for StringLikePartIter<'_> {
fn next_back(&mut self) -> Option<Self::Item> {
let part = match self {
StringLikePartIter::String(inner) => StringLikePart::String(inner.next_back()?),
StringLikePartIter::Bytes(inner) => StringLikePart::Bytes(inner.next_back()?),
StringLikePartIter::FString(inner) => inner.next_back()?.into(),
StringLikePartIter::TString(inner) => StringLikePart::TString(inner.next_back()?),
};
Some(part)
}
}
impl FusedIterator for StringLikePartIter<'_> {}
impl ExactSizeIterator for StringLikePartIter<'_> {}