bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/cfg/src/cfg_attr.rs')
-rw-r--r--crates/cfg/src/cfg_attr.rs70
1 files changed, 0 insertions, 70 deletions
diff --git a/crates/cfg/src/cfg_attr.rs b/crates/cfg/src/cfg_attr.rs
deleted file mode 100644
index 4eb5928b1e..0000000000
--- a/crates/cfg/src/cfg_attr.rs
+++ /dev/null
@@ -1,70 +0,0 @@
-use std::{
- fmt::{self, Debug},
- slice::Iter as SliceIter,
-};
-
-use crate::{cfg_expr::next_cfg_expr, CfgAtom, CfgExpr};
-use tt::{Delimiter, SmolStr, Span};
-/// Represents a `#[cfg_attr(.., my_attr)]` attribute.
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct CfgAttr<S> {
- /// Expression in `cfg_attr` attribute.
- pub cfg_expr: CfgExpr,
- /// Inner attribute.
- pub attr: tt::Subtree<S>,
-}
-
-impl<S: Clone + Span + Debug> CfgAttr<S> {
- /// Parses a sub tree in the form of (cfg_expr, inner_attribute)
- pub fn parse(tt: &tt::Subtree<S>) -> Option<CfgAttr<S>> {
- let mut iter = tt.token_trees.iter();
- let cfg_expr = next_cfg_expr(&mut iter).unwrap_or(CfgExpr::Invalid);
- // FIXME: This is probably not the right way to do this
- // Get's the span of the next token tree
- let first_span = iter.as_slice().first().map(|tt| tt.first_span())?;
- let attr = tt::Subtree {
- delimiter: Delimiter::invisible_spanned(first_span),
- token_trees: iter.cloned().collect(),
- };
- Some(CfgAttr { cfg_expr, attr: attr })
- }
-}
-
-#[cfg(test)]
-mod tests {
- use expect_test::{expect, Expect};
- use mbe::{syntax_node_to_token_tree, DummyTestSpanMap, DUMMY};
- use syntax::{ast, AstNode};
-
- use crate::{CfgAttr, DnfExpr};
-
- fn check_dnf(input: &str, expected_dnf: Expect, expected_attrs: Expect) {
- let source_file = ast::SourceFile::parse(input).ok().unwrap();
- let tt = source_file.syntax().descendants().find_map(ast::TokenTree::cast).unwrap();
- let tt = syntax_node_to_token_tree(tt.syntax(), DummyTestSpanMap, DUMMY);
- let Some(CfgAttr { cfg_expr, attr }) = CfgAttr::parse(&tt) else {
- assert!(false, "failed to parse cfg_attr");
- return;
- };
-
- let actual = format!("#![cfg({})]", DnfExpr::new(cfg_expr));
- expected_dnf.assert_eq(&actual);
- let actual_attrs = format!("#![{}]", attr);
- expected_attrs.assert_eq(&actual_attrs);
- }
-
- #[test]
- fn smoke() {
- check_dnf(
- r#"#![cfg_attr(feature = "nightly", feature(slice_split_at_unchecked))]"#,
- expect![[r#"#![cfg(feature = "nightly")]"#]],
- expect![r#"#![feature (slice_split_at_unchecked)]"#],
- );
-
- check_dnf(
- r#"#![cfg_attr(not(feature = "std"), no_std)]"#,
- expect![[r#"#![cfg(not(feature = "std"))]"#]],
- expect![r#"#![no_std]"#],
- );
- }
-}