diff options
Diffstat (limited to 'src/tools/rust-analyzer/crates/ide-assists/src/utils.rs')
| -rw-r--r-- | src/tools/rust-analyzer/crates/ide-assists/src/utils.rs | 88 |
1 files changed, 46 insertions, 42 deletions
diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/utils.rs b/src/tools/rust-analyzer/crates/ide-assists/src/utils.rs index 4ab6e2627..db32e7182 100644 --- a/src/tools/rust-analyzer/crates/ide-assists/src/utils.rs +++ b/src/tools/rust-analyzer/crates/ide-assists/src/utils.rs @@ -2,8 +2,6 @@ use std::ops; -use itertools::Itertools; - pub(crate) use gen_trait_fn_body::gen_trait_fn_body; use hir::{db::HirDatabase, HirDisplay, Semantics}; use ide_db::{famous_defs::FamousDefs, path_transform::PathTransform, RootDatabase, SnippetCap}; @@ -15,7 +13,7 @@ use syntax::{ edit_in_place::{AttrsOwnerEdit, Removable}, make, HasArgList, HasAttrs, HasGenericParams, HasName, HasTypeBounds, Whitespace, }, - ted, AstNode, AstToken, Direction, SmolStr, SourceFile, + ted, AstNode, AstToken, Direction, SourceFile, SyntaxKind::*, SyntaxNode, TextRange, TextSize, T, }; @@ -333,10 +331,14 @@ fn calc_depth(pat: &ast::Pat, depth: usize) -> usize { // FIXME: change the new fn checking to a more semantic approach when that's more // viable (e.g. we process proc macros, etc) // FIXME: this partially overlaps with `find_impl_block_*` + +/// `find_struct_impl` looks for impl of a struct, but this also has additional feature +/// where it takes a list of function names and check if they exist inside impl_, if +/// even one match is found, it returns None pub(crate) fn find_struct_impl( ctx: &AssistContext<'_>, adt: &ast::Adt, - name: &str, + names: &[String], ) -> Option<Option<ast::Impl>> { let db = ctx.db(); let module = adt.syntax().parent()?; @@ -364,7 +366,7 @@ pub(crate) fn find_struct_impl( }); if let Some(ref impl_blk) = block { - if has_fn(impl_blk, name) { + if has_any_fn(impl_blk, names) { return None; } } @@ -372,12 +374,12 @@ pub(crate) fn find_struct_impl( Some(block) } -fn has_fn(imp: &ast::Impl, rhs_name: &str) -> bool { +fn has_any_fn(imp: &ast::Impl, names: &[String]) -> bool { if let Some(il) = imp.assoc_item_list() { for item in il.assoc_items() { if let ast::AssocItem::Fn(f) = item { if let Some(name) = f.name() { - if name.text().eq_ignore_ascii_case(rhs_name) { + if names.iter().any(|n| n.eq_ignore_ascii_case(&name.text())) { return true; } } @@ -424,34 +426,44 @@ pub(crate) fn generate_trait_impl_text(adt: &ast::Adt, trait_text: &str, code: & } fn generate_impl_text_inner(adt: &ast::Adt, trait_text: Option<&str>, code: &str) -> String { - let generic_params = adt.generic_param_list(); + // Ensure lifetime params are before type & const params + let generic_params = adt.generic_param_list().map(|generic_params| { + let lifetime_params = + generic_params.lifetime_params().map(ast::GenericParam::LifetimeParam); + let ty_or_const_params = generic_params.type_or_const_params().filter_map(|param| { + // remove defaults since they can't be specified in impls + match param { + ast::TypeOrConstParam::Type(param) => { + let param = param.clone_for_update(); + param.remove_default(); + Some(ast::GenericParam::TypeParam(param)) + } + ast::TypeOrConstParam::Const(param) => { + let param = param.clone_for_update(); + param.remove_default(); + Some(ast::GenericParam::ConstParam(param)) + } + } + }); + + make::generic_param_list(itertools::chain(lifetime_params, ty_or_const_params)) + }); + + // FIXME: use syntax::make & mutable AST apis instead + // `trait_text` and `code` can't be opaque blobs of text let mut buf = String::with_capacity(code.len()); + + // Copy any cfg attrs from the original adt buf.push_str("\n\n"); - adt.attrs() - .filter(|attr| attr.as_simple_call().map(|(name, _arg)| name == "cfg").unwrap_or(false)) - .for_each(|attr| buf.push_str(format!("{}\n", attr).as_str())); + let cfg_attrs = adt + .attrs() + .filter(|attr| attr.as_simple_call().map(|(name, _arg)| name == "cfg").unwrap_or(false)); + cfg_attrs.for_each(|attr| buf.push_str(&format!("{attr}\n"))); + + // `impl{generic_params} {trait_text} for {name}{generic_params.to_generic_args()}` buf.push_str("impl"); if let Some(generic_params) = &generic_params { - let lifetimes = generic_params.lifetime_params().map(|lt| format!("{}", lt.syntax())); - let toc_params = generic_params.type_or_const_params().map(|toc_param| { - let type_param = match toc_param { - ast::TypeOrConstParam::Type(x) => x, - ast::TypeOrConstParam::Const(x) => return x.syntax().to_string(), - }; - let mut buf = String::new(); - if let Some(it) = type_param.name() { - format_to!(buf, "{}", it.syntax()); - } - if let Some(it) = type_param.colon_token() { - format_to!(buf, "{} ", it); - } - if let Some(it) = type_param.type_bound_list() { - format_to!(buf, "{}", it.syntax()); - } - buf - }); - let generics = lifetimes.chain(toc_params).format(", "); - format_to!(buf, "<{}>", generics); + format_to!(buf, "{generic_params}"); } buf.push(' '); if let Some(trait_text) = trait_text { @@ -460,23 +472,15 @@ fn generate_impl_text_inner(adt: &ast::Adt, trait_text: Option<&str>, code: &str } buf.push_str(&adt.name().unwrap().text()); if let Some(generic_params) = generic_params { - let lifetime_params = generic_params - .lifetime_params() - .filter_map(|it| it.lifetime()) - .map(|it| SmolStr::from(it.text())); - let toc_params = generic_params - .type_or_const_params() - .filter_map(|it| it.name()) - .map(|it| SmolStr::from(it.text())); - format_to!(buf, "<{}>", lifetime_params.chain(toc_params).format(", ")) + format_to!(buf, "{}", generic_params.to_generic_args()); } match adt.where_clause() { Some(where_clause) => { - format_to!(buf, "\n{}\n{{\n{}\n}}", where_clause, code); + format_to!(buf, "\n{where_clause}\n{{\n{code}\n}}"); } None => { - format_to!(buf, " {{\n{}\n}}", code); + format_to!(buf, " {{\n{code}\n}}"); } } |