mirror of https://github.com/astral-sh/ruff
115 lines
3.0 KiB
Rust
115 lines
3.0 KiB
Rust
/// A representation of an individual name imported via any import statement.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub enum AnyImport<'a> {
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Import(Import<'a>),
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ImportFrom(ImportFrom<'a>),
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}
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/// A representation of an individual name imported via an `import` statement.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct Import<'a> {
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pub name: Alias<'a>,
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}
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/// A representation of an individual name imported via a `from ... import` statement.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct ImportFrom<'a> {
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pub module: Option<&'a str>,
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pub name: Alias<'a>,
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pub level: u32,
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct Alias<'a> {
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pub name: &'a str,
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pub as_name: Option<&'a str>,
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}
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impl<'a> Import<'a> {
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/// Creates a new `Import` to import the specified module.
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pub fn module(name: &'a str) -> Self {
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Self {
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name: Alias {
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name,
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as_name: None,
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},
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}
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}
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}
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impl<'a> ImportFrom<'a> {
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/// Creates a new `ImportFrom` to import a member from the specified module.
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pub fn member(module: &'a str, name: &'a str) -> Self {
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Self {
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module: Some(module),
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name: Alias {
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name,
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as_name: None,
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},
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level: 0,
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}
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}
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}
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impl std::fmt::Display for AnyImport<'_> {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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match self {
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AnyImport::Import(import) => write!(f, "{import}"),
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AnyImport::ImportFrom(import_from) => write!(f, "{import_from}"),
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}
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}
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}
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impl std::fmt::Display for Import<'_> {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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write!(f, "import {}", self.name.name)?;
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if let Some(as_name) = self.name.as_name {
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write!(f, " as {as_name}")?;
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}
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Ok(())
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}
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}
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impl std::fmt::Display for ImportFrom<'_> {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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write!(f, "from ")?;
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if self.level > 0 {
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write!(f, "{}", ".".repeat(self.level as usize))?;
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}
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if let Some(module) = self.module {
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write!(f, "{module}")?;
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}
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write!(f, " import {}", self.name.name)?;
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if let Some(as_name) = self.name.as_name {
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write!(f, " as {as_name}")?;
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}
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Ok(())
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}
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}
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pub trait FutureImport {
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/// Returns `true` if this import is from the `__future__` module.
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fn is_future_import(&self) -> bool;
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}
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impl FutureImport for Import<'_> {
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fn is_future_import(&self) -> bool {
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self.name.name == "__future__"
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}
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}
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impl FutureImport for ImportFrom<'_> {
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fn is_future_import(&self) -> bool {
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self.module == Some("__future__")
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}
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}
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impl FutureImport for AnyImport<'_> {
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fn is_future_import(&self) -> bool {
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match self {
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AnyImport::Import(import) => import.is_future_import(),
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AnyImport::ImportFrom(import_from) => import_from.is_future_import(),
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}
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}
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}
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