mirror of
https://github.com/rust-lang/rust-analyzer
synced 2024-12-31 23:38:45 +00:00
31 lines
1 KiB
Rust
31 lines
1 KiB
Rust
use hir::{DefWithBody, Semantics};
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use ide_db::base_db::FilePosition;
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use ide_db::RootDatabase;
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use syntax::{algo::ancestors_at_offset, ast, AstNode};
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// Feature: View Mir
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//
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// |===
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// | Editor | Action Name
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//
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// | VS Code | **rust-analyzer: View Mir**
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// |===
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pub(crate) fn view_mir(db: &RootDatabase, position: FilePosition) -> String {
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body_mir(db, position).unwrap_or_else(|| "Not inside a function body".to_owned())
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}
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fn body_mir(db: &RootDatabase, position: FilePosition) -> Option<String> {
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let sema = Semantics::new(db);
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let source_file = sema.parse(position.file_id);
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let item = ancestors_at_offset(source_file.syntax(), position.offset)
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.filter(|it| !ast::MacroCall::can_cast(it.kind()))
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.find_map(ast::Item::cast)?;
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let def: DefWithBody = match item {
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ast::Item::Fn(it) => sema.to_def(&it)?.into(),
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ast::Item::Const(it) => sema.to_def(&it)?.into(),
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ast::Item::Static(it) => sema.to_def(&it)?.into(),
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_ => return None,
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};
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Some(def.debug_mir(db))
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}
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