use hir::{DefWithBody, Semantics}; use ide_db::base_db::FilePosition; use ide_db::RootDatabase; use syntax::{algo::ancestors_at_offset, ast, AstNode}; // Feature: View Hir // // |=== // | Editor | Action Name // // | VS Code | **rust-analyzer: View Hir** // |=== // image::https://user-images.githubusercontent.com/48062697/113065588-068bdb80-91b1-11eb-9a78-0b4ef1e972fb.gif[] pub(crate) fn view_hir(db: &RootDatabase, position: FilePosition) -> String { body_hir(db, position).unwrap_or_else(|| "Not inside a function body".to_string()) } fn body_hir(db: &RootDatabase, position: FilePosition) -> Option { let sema = Semantics::new(db); let source_file = sema.parse(position.file_id); let item = ancestors_at_offset(source_file.syntax(), position.offset) .filter(|it| ast::MacroCall::can_cast(it.kind())) .find_map(ast::Item::cast)?; let def: DefWithBody = match item { ast::Item::Fn(it) => sema.to_def(&it)?.into(), ast::Item::Const(it) => sema.to_def(&it)?.into(), ast::Item::Static(it) => sema.to_def(&it)?.into(), _ => return None, }; Some(def.debug_hir(db)) }