2762 lines
62 KiB
Rust
2762 lines
62 KiB
Rust
use hir::{
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Adt, AsAssocItem, HasSource, HirDisplay, Module, PathResolution, Semantics, Type, TypeInfo,
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};
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use ide_db::{
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base_db::FileId,
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defs::{Definition, NameRefClass},
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famous_defs::FamousDefs,
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helpers::is_editable_crate,
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path_transform::PathTransform,
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FxHashMap, FxHashSet, RootDatabase, SnippetCap,
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};
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use stdx::to_lower_snake_case;
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use syntax::{
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ast::{
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self,
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edit::{AstNodeEdit, IndentLevel},
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make, AstNode, CallExpr, HasArgList, HasGenericParams, HasModuleItem, HasTypeBounds,
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},
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SyntaxKind, SyntaxNode, TextRange, TextSize,
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};
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use crate::{
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utils::{convert_reference_type, find_struct_impl, render_snippet, Cursor},
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AssistContext, AssistId, AssistKind, Assists,
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};
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// Assist: generate_function
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//
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// Adds a stub function with a signature matching the function under the cursor.
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//
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// ```
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// struct Baz;
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// fn baz() -> Baz { Baz }
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// fn foo() {
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// bar$0("", baz());
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// }
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//
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// ```
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// ->
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// ```
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// struct Baz;
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// fn baz() -> Baz { Baz }
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// fn foo() {
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// bar("", baz());
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// }
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//
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// fn bar(arg: &str, baz: Baz) ${0:-> _} {
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// todo!()
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// }
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//
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// ```
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pub(crate) fn generate_function(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
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gen_fn(acc, ctx).or_else(|| gen_method(acc, ctx))
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}
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fn gen_fn(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
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let path_expr: ast::PathExpr = ctx.find_node_at_offset()?;
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let call = path_expr.syntax().parent().and_then(ast::CallExpr::cast)?;
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let path = path_expr.path()?;
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let name_ref = path.segment()?.name_ref()?;
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if ctx.sema.resolve_path(&path).is_some() {
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// The function call already resolves, no need to add a function
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return None;
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}
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let fn_name = &*name_ref.text();
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let TargetInfo { target_module, adt_name, target, file, insert_offset } =
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fn_target_info(ctx, path, &call, fn_name)?;
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if let Some(m) = target_module {
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if !is_editable_crate(m.krate(), ctx.db()) {
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return None;
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}
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}
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let function_builder = FunctionBuilder::from_call(ctx, &call, fn_name, target_module, target)?;
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let text_range = call.syntax().text_range();
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let label = format!("Generate {} function", function_builder.fn_name);
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add_func_to_accumulator(
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acc,
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ctx,
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text_range,
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function_builder,
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insert_offset,
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file,
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adt_name,
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label,
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)
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}
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struct TargetInfo {
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target_module: Option<Module>,
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adt_name: Option<hir::Name>,
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target: GeneratedFunctionTarget,
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file: FileId,
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insert_offset: TextSize,
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}
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impl TargetInfo {
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fn new(
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target_module: Option<Module>,
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adt_name: Option<hir::Name>,
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target: GeneratedFunctionTarget,
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file: FileId,
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insert_offset: TextSize,
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) -> Self {
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Self { target_module, adt_name, target, file, insert_offset }
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}
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}
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fn fn_target_info(
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ctx: &AssistContext<'_>,
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path: ast::Path,
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call: &CallExpr,
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fn_name: &str,
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) -> Option<TargetInfo> {
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match path.qualifier() {
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Some(qualifier) => match ctx.sema.resolve_path(&qualifier) {
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Some(hir::PathResolution::Def(hir::ModuleDef::Module(module))) => {
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get_fn_target_info(ctx, Some(module), call.clone())
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}
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Some(hir::PathResolution::Def(hir::ModuleDef::Adt(adt))) => {
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if let hir::Adt::Enum(_) = adt {
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// Don't suggest generating function if the name starts with an uppercase letter
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if fn_name.starts_with(char::is_uppercase) {
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return None;
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}
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}
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assoc_fn_target_info(ctx, call, adt, fn_name)
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}
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Some(hir::PathResolution::SelfType(impl_)) => {
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let adt = impl_.self_ty(ctx.db()).as_adt()?;
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assoc_fn_target_info(ctx, call, adt, fn_name)
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}
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_ => None,
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},
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_ => get_fn_target_info(ctx, None, call.clone()),
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}
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}
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fn gen_method(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
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let call: ast::MethodCallExpr = ctx.find_node_at_offset()?;
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if ctx.sema.resolve_method_call(&call).is_some() {
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return None;
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}
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let fn_name = call.name_ref()?;
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let receiver_ty = ctx.sema.type_of_expr(&call.receiver()?)?.original().strip_references();
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let adt = receiver_ty.as_adt()?;
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let target_module = adt.module(ctx.sema.db);
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if !is_editable_crate(target_module.krate(), ctx.db()) {
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return None;
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}
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let (impl_, file) = get_adt_source(ctx, &adt, fn_name.text().as_str())?;
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let (target, insert_offset) = get_method_target(ctx, &impl_, &adt)?;
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let function_builder = FunctionBuilder::from_method_call(
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ctx,
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&call,
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&fn_name,
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receiver_ty,
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target_module,
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target,
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)?;
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let text_range = call.syntax().text_range();
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let adt_name = if impl_.is_none() { Some(adt.name(ctx.sema.db)) } else { None };
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let label = format!("Generate {} method", function_builder.fn_name);
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add_func_to_accumulator(
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acc,
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ctx,
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text_range,
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function_builder,
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insert_offset,
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file,
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adt_name,
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label,
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)
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}
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fn add_func_to_accumulator(
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acc: &mut Assists,
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ctx: &AssistContext<'_>,
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text_range: TextRange,
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function_builder: FunctionBuilder,
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insert_offset: TextSize,
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file: FileId,
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adt_name: Option<hir::Name>,
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label: String,
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) -> Option<()> {
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acc.add(AssistId("generate_function", AssistKind::Generate), label, text_range, |builder| {
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let indent = IndentLevel::from_node(function_builder.target.syntax());
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let function_template = function_builder.render(adt_name.is_some());
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let mut func = function_template.to_string(ctx.config.snippet_cap);
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if let Some(name) = adt_name {
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// FIXME: adt may have generic params.
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func = format!("\n{indent}impl {name} {{\n{func}\n{indent}}}");
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}
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builder.edit_file(file);
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match ctx.config.snippet_cap {
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Some(cap) => builder.insert_snippet(cap, insert_offset, func),
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None => builder.insert(insert_offset, func),
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}
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})
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}
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fn get_adt_source(
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ctx: &AssistContext<'_>,
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adt: &hir::Adt,
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fn_name: &str,
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) -> Option<(Option<ast::Impl>, FileId)> {
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let range = adt.source(ctx.sema.db)?.syntax().original_file_range(ctx.sema.db);
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let file = ctx.sema.parse(range.file_id);
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let adt_source =
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ctx.sema.find_node_at_offset_with_macros(file.syntax(), range.range.start())?;
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find_struct_impl(ctx, &adt_source, &[fn_name.to_string()]).map(|impl_| (impl_, range.file_id))
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}
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struct FunctionTemplate {
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leading_ws: String,
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fn_def: ast::Fn,
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ret_type: Option<ast::RetType>,
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should_focus_return_type: bool,
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trailing_ws: String,
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tail_expr: ast::Expr,
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}
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impl FunctionTemplate {
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fn to_string(&self, cap: Option<SnippetCap>) -> String {
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let Self { leading_ws, fn_def, ret_type, should_focus_return_type, trailing_ws, tail_expr } =
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self;
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let f = match cap {
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Some(cap) => {
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let cursor = if *should_focus_return_type {
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// Focus the return type if there is one
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match ret_type {
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Some(ret_type) => ret_type.syntax(),
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None => tail_expr.syntax(),
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}
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} else {
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tail_expr.syntax()
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};
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render_snippet(cap, fn_def.syntax(), Cursor::Replace(cursor))
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}
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None => fn_def.to_string(),
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};
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format!("{leading_ws}{f}{trailing_ws}")
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}
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}
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struct FunctionBuilder {
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target: GeneratedFunctionTarget,
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fn_name: ast::Name,
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generic_param_list: Option<ast::GenericParamList>,
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where_clause: Option<ast::WhereClause>,
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params: ast::ParamList,
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ret_type: Option<ast::RetType>,
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should_focus_return_type: bool,
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visibility: Visibility,
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is_async: bool,
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}
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impl FunctionBuilder {
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/// Prepares a generated function that matches `call`.
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/// The function is generated in `target_module` or next to `call`
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fn from_call(
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ctx: &AssistContext<'_>,
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call: &ast::CallExpr,
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fn_name: &str,
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target_module: Option<Module>,
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target: GeneratedFunctionTarget,
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) -> Option<Self> {
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let target_module =
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target_module.or_else(|| ctx.sema.scope(target.syntax()).map(|it| it.module()))?;
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let current_module = ctx.sema.scope(call.syntax())?.module();
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let visibility = calculate_necessary_visibility(current_module, target_module, ctx);
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let fn_name = make::name(fn_name);
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let mut necessary_generic_params = FxHashSet::default();
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let params = fn_args(
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ctx,
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target_module,
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ast::CallableExpr::Call(call.clone()),
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&mut necessary_generic_params,
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)?;
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let await_expr = call.syntax().parent().and_then(ast::AwaitExpr::cast);
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let is_async = await_expr.is_some();
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let (ret_type, should_focus_return_type) = make_return_type(
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ctx,
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&ast::Expr::CallExpr(call.clone()),
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target_module,
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&mut necessary_generic_params,
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);
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let (generic_param_list, where_clause) =
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fn_generic_params(ctx, necessary_generic_params, &target)?;
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Some(Self {
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target,
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fn_name,
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generic_param_list,
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where_clause,
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params,
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ret_type,
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should_focus_return_type,
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visibility,
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is_async,
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})
|
|
}
|
|
|
|
fn from_method_call(
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|
ctx: &AssistContext<'_>,
|
|
call: &ast::MethodCallExpr,
|
|
name: &ast::NameRef,
|
|
receiver_ty: Type,
|
|
target_module: Module,
|
|
target: GeneratedFunctionTarget,
|
|
) -> Option<Self> {
|
|
let current_module = ctx.sema.scope(call.syntax())?.module();
|
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let visibility = calculate_necessary_visibility(current_module, target_module, ctx);
|
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let fn_name = make::name(&name.text());
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let mut necessary_generic_params = FxHashSet::default();
|
|
necessary_generic_params.extend(receiver_ty.generic_params(ctx.db()));
|
|
let params = fn_args(
|
|
ctx,
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|
target_module,
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ast::CallableExpr::MethodCall(call.clone()),
|
|
&mut necessary_generic_params,
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|
)?;
|
|
|
|
let await_expr = call.syntax().parent().and_then(ast::AwaitExpr::cast);
|
|
let is_async = await_expr.is_some();
|
|
|
|
let (ret_type, should_focus_return_type) = make_return_type(
|
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ctx,
|
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&ast::Expr::MethodCallExpr(call.clone()),
|
|
target_module,
|
|
&mut necessary_generic_params,
|
|
);
|
|
|
|
let (generic_param_list, where_clause) =
|
|
fn_generic_params(ctx, necessary_generic_params, &target)?;
|
|
|
|
Some(Self {
|
|
target,
|
|
fn_name,
|
|
generic_param_list,
|
|
where_clause,
|
|
params,
|
|
ret_type,
|
|
should_focus_return_type,
|
|
visibility,
|
|
is_async,
|
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})
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}
|
|
|
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fn render(self, is_method: bool) -> FunctionTemplate {
|
|
let placeholder_expr = make::ext::expr_todo();
|
|
let fn_body = make::block_expr(vec![], Some(placeholder_expr));
|
|
let visibility = match self.visibility {
|
|
Visibility::None => None,
|
|
Visibility::Crate => Some(make::visibility_pub_crate()),
|
|
Visibility::Pub => Some(make::visibility_pub()),
|
|
};
|
|
let mut fn_def = make::fn_(
|
|
visibility,
|
|
self.fn_name,
|
|
self.generic_param_list,
|
|
self.where_clause,
|
|
self.params,
|
|
fn_body,
|
|
self.ret_type,
|
|
self.is_async,
|
|
);
|
|
let leading_ws;
|
|
let trailing_ws;
|
|
|
|
match self.target {
|
|
GeneratedFunctionTarget::BehindItem(it) => {
|
|
let mut indent = IndentLevel::from_node(&it);
|
|
if is_method {
|
|
indent = indent + 1;
|
|
leading_ws = format!("{indent}");
|
|
} else {
|
|
leading_ws = format!("\n\n{indent}");
|
|
}
|
|
|
|
fn_def = fn_def.indent(indent);
|
|
trailing_ws = String::new();
|
|
}
|
|
GeneratedFunctionTarget::InEmptyItemList(it) => {
|
|
let indent = IndentLevel::from_node(&it);
|
|
let leading_indent = indent + 1;
|
|
leading_ws = format!("\n{leading_indent}");
|
|
fn_def = fn_def.indent(leading_indent);
|
|
trailing_ws = format!("\n{indent}");
|
|
}
|
|
};
|
|
|
|
FunctionTemplate {
|
|
leading_ws,
|
|
ret_type: fn_def.ret_type(),
|
|
// PANIC: we guarantee we always create a function body with a tail expr
|
|
tail_expr: fn_def.body().unwrap().tail_expr().unwrap(),
|
|
should_focus_return_type: self.should_focus_return_type,
|
|
fn_def,
|
|
trailing_ws,
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Makes an optional return type along with whether the return type should be focused by the cursor.
|
|
/// If we cannot infer what the return type should be, we create a placeholder type.
|
|
///
|
|
/// The rule for whether we focus a return type or not (and thus focus the function body),
|
|
/// is rather simple:
|
|
/// * If we could *not* infer what the return type should be, focus it (so the user can fill-in
|
|
/// the correct return type).
|
|
/// * If we could infer the return type, don't focus it (and thus focus the function body) so the
|
|
/// user can change the `todo!` function body.
|
|
fn make_return_type(
|
|
ctx: &AssistContext<'_>,
|
|
call: &ast::Expr,
|
|
target_module: Module,
|
|
necessary_generic_params: &mut FxHashSet<hir::GenericParam>,
|
|
) -> (Option<ast::RetType>, bool) {
|
|
let (ret_ty, should_focus_return_type) = {
|
|
match ctx.sema.type_of_expr(call).map(TypeInfo::original) {
|
|
Some(ty) if ty.is_unknown() => (Some(make::ty_placeholder()), true),
|
|
None => (Some(make::ty_placeholder()), true),
|
|
Some(ty) if ty.is_unit() => (None, false),
|
|
Some(ty) => {
|
|
necessary_generic_params.extend(ty.generic_params(ctx.db()));
|
|
let rendered = ty.display_source_code(ctx.db(), target_module.into());
|
|
match rendered {
|
|
Ok(rendered) => (Some(make::ty(&rendered)), false),
|
|
Err(_) => (Some(make::ty_placeholder()), true),
|
|
}
|
|
}
|
|
}
|
|
};
|
|
let ret_type = ret_ty.map(make::ret_type);
|
|
(ret_type, should_focus_return_type)
|
|
}
|
|
|
|
fn get_fn_target_info(
|
|
ctx: &AssistContext<'_>,
|
|
target_module: Option<Module>,
|
|
call: CallExpr,
|
|
) -> Option<TargetInfo> {
|
|
let (target, file, insert_offset) = get_fn_target(ctx, target_module, call)?;
|
|
Some(TargetInfo::new(target_module, None, target, file, insert_offset))
|
|
}
|
|
|
|
fn get_fn_target(
|
|
ctx: &AssistContext<'_>,
|
|
target_module: Option<Module>,
|
|
call: CallExpr,
|
|
) -> Option<(GeneratedFunctionTarget, FileId, TextSize)> {
|
|
let mut file = ctx.file_id();
|
|
let target = match target_module {
|
|
Some(target_module) => {
|
|
let module_source = target_module.definition_source(ctx.db());
|
|
let (in_file, target) = next_space_for_fn_in_module(ctx.sema.db, &module_source)?;
|
|
file = in_file;
|
|
target
|
|
}
|
|
None => next_space_for_fn_after_call_site(ast::CallableExpr::Call(call))?,
|
|
};
|
|
Some((target.clone(), file, get_insert_offset(&target)))
|
|
}
|
|
|
|
fn get_method_target(
|
|
ctx: &AssistContext<'_>,
|
|
impl_: &Option<ast::Impl>,
|
|
adt: &Adt,
|
|
) -> Option<(GeneratedFunctionTarget, TextSize)> {
|
|
let target = match impl_ {
|
|
Some(impl_) => next_space_for_fn_in_impl(impl_)?,
|
|
None => {
|
|
GeneratedFunctionTarget::BehindItem(adt.source(ctx.sema.db)?.syntax().value.clone())
|
|
}
|
|
};
|
|
Some((target.clone(), get_insert_offset(&target)))
|
|
}
|
|
|
|
fn assoc_fn_target_info(
|
|
ctx: &AssistContext<'_>,
|
|
call: &CallExpr,
|
|
adt: hir::Adt,
|
|
fn_name: &str,
|
|
) -> Option<TargetInfo> {
|
|
let current_module = ctx.sema.scope(call.syntax())?.module();
|
|
let module = adt.module(ctx.sema.db);
|
|
let target_module = if current_module == module { None } else { Some(module) };
|
|
if current_module.krate() != module.krate() {
|
|
return None;
|
|
}
|
|
let (impl_, file) = get_adt_source(ctx, &adt, fn_name)?;
|
|
let (target, insert_offset) = get_method_target(ctx, &impl_, &adt)?;
|
|
let adt_name = if impl_.is_none() { Some(adt.name(ctx.sema.db)) } else { None };
|
|
Some(TargetInfo::new(target_module, adt_name, target, file, insert_offset))
|
|
}
|
|
|
|
fn get_insert_offset(target: &GeneratedFunctionTarget) -> TextSize {
|
|
match &target {
|
|
GeneratedFunctionTarget::BehindItem(it) => it.text_range().end(),
|
|
GeneratedFunctionTarget::InEmptyItemList(it) => it.text_range().start() + TextSize::of('{'),
|
|
}
|
|
}
|
|
|
|
#[derive(Clone)]
|
|
enum GeneratedFunctionTarget {
|
|
BehindItem(SyntaxNode),
|
|
InEmptyItemList(SyntaxNode),
|
|
}
|
|
|
|
impl GeneratedFunctionTarget {
|
|
fn syntax(&self) -> &SyntaxNode {
|
|
match self {
|
|
GeneratedFunctionTarget::BehindItem(it) => it,
|
|
GeneratedFunctionTarget::InEmptyItemList(it) => it,
|
|
}
|
|
}
|
|
|
|
fn parent(&self) -> SyntaxNode {
|
|
match self {
|
|
GeneratedFunctionTarget::BehindItem(it) => it.parent().expect("item without parent"),
|
|
GeneratedFunctionTarget::InEmptyItemList(it) => it.clone(),
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Computes parameter list for the generated function.
|
|
fn fn_args(
|
|
ctx: &AssistContext<'_>,
|
|
target_module: Module,
|
|
call: ast::CallableExpr,
|
|
necessary_generic_params: &mut FxHashSet<hir::GenericParam>,
|
|
) -> Option<ast::ParamList> {
|
|
let mut arg_names = Vec::new();
|
|
let mut arg_types = Vec::new();
|
|
for arg in call.arg_list()?.args() {
|
|
arg_names.push(fn_arg_name(&ctx.sema, &arg));
|
|
arg_types.push(fn_arg_type(ctx, target_module, &arg, necessary_generic_params));
|
|
}
|
|
deduplicate_arg_names(&mut arg_names);
|
|
let params = arg_names.into_iter().zip(arg_types).map(|(name, ty)| {
|
|
make::param(make::ext::simple_ident_pat(make::name(&name)).into(), make::ty(&ty))
|
|
});
|
|
|
|
Some(make::param_list(
|
|
match call {
|
|
ast::CallableExpr::Call(_) => None,
|
|
ast::CallableExpr::MethodCall(_) => Some(make::self_param()),
|
|
},
|
|
params,
|
|
))
|
|
}
|
|
|
|
/// Gets parameter bounds and where predicates in scope and filters out irrelevant ones. Returns
|
|
/// `None` when it fails to get scope information.
|
|
///
|
|
/// See comment on `filter_unnecessary_bounds()` for what bounds we consider relevant.
|
|
///
|
|
/// NOTE: Generic parameters returned from this function may cause name clash at `target`. We don't
|
|
/// currently do anything about it because it's actually easy to resolve it after the assist: just
|
|
/// use the Rename functionality.
|
|
fn fn_generic_params(
|
|
ctx: &AssistContext<'_>,
|
|
necessary_params: FxHashSet<hir::GenericParam>,
|
|
target: &GeneratedFunctionTarget,
|
|
) -> Option<(Option<ast::GenericParamList>, Option<ast::WhereClause>)> {
|
|
if necessary_params.is_empty() {
|
|
// Not really needed but fast path.
|
|
return Some((None, None));
|
|
}
|
|
|
|
// 1. Get generic parameters (with bounds) and where predicates in scope.
|
|
let (generic_params, where_preds) = params_and_where_preds_in_scope(ctx);
|
|
|
|
// 2. Extract type parameters included in each bound.
|
|
let mut generic_params = generic_params
|
|
.into_iter()
|
|
.filter_map(|it| compute_contained_params_in_generic_param(ctx, it))
|
|
.collect();
|
|
let mut where_preds = where_preds
|
|
.into_iter()
|
|
.filter_map(|it| compute_contained_params_in_where_pred(ctx, it))
|
|
.collect();
|
|
|
|
// 3. Filter out unnecessary bounds.
|
|
filter_unnecessary_bounds(&mut generic_params, &mut where_preds, necessary_params);
|
|
filter_bounds_in_scope(&mut generic_params, &mut where_preds, ctx, target);
|
|
|
|
let generic_params: Vec<_> =
|
|
generic_params.into_iter().map(|it| it.node.clone_for_update()).collect();
|
|
let where_preds: Vec<_> =
|
|
where_preds.into_iter().map(|it| it.node.clone_for_update()).collect();
|
|
|
|
// 4. Rewrite paths
|
|
if let Some(param) = generic_params.first() {
|
|
let source_scope = ctx.sema.scope(param.syntax())?;
|
|
let target_scope = ctx.sema.scope(&target.parent())?;
|
|
if source_scope.module() != target_scope.module() {
|
|
let transform = PathTransform::generic_transformation(&target_scope, &source_scope);
|
|
let generic_params = generic_params.iter().map(|it| it.syntax());
|
|
let where_preds = where_preds.iter().map(|it| it.syntax());
|
|
transform.apply_all(generic_params.chain(where_preds));
|
|
}
|
|
}
|
|
|
|
let generic_param_list = make::generic_param_list(generic_params);
|
|
let where_clause =
|
|
if where_preds.is_empty() { None } else { Some(make::where_clause(where_preds)) };
|
|
|
|
Some((Some(generic_param_list), where_clause))
|
|
}
|
|
|
|
fn params_and_where_preds_in_scope(
|
|
ctx: &AssistContext<'_>,
|
|
) -> (Vec<ast::GenericParam>, Vec<ast::WherePred>) {
|
|
let Some(body) = containing_body(ctx) else { return Default::default(); };
|
|
|
|
let mut generic_params = Vec::new();
|
|
let mut where_clauses = Vec::new();
|
|
|
|
// There are two items where generic parameters currently in scope may be declared: the item
|
|
// the cursor is at, and its parent (if any).
|
|
//
|
|
// We handle parent first so that their generic parameters appear first in the generic
|
|
// parameter list of the function we're generating.
|
|
let db = ctx.db();
|
|
if let Some(parent) = body.as_assoc_item(db).map(|it| it.container(db)) {
|
|
match parent {
|
|
hir::AssocItemContainer::Impl(it) => {
|
|
let (params, clauses) = get_bounds_in_scope(ctx, it);
|
|
generic_params.extend(params);
|
|
where_clauses.extend(clauses);
|
|
}
|
|
hir::AssocItemContainer::Trait(it) => {
|
|
let (params, clauses) = get_bounds_in_scope(ctx, it);
|
|
generic_params.extend(params);
|
|
where_clauses.extend(clauses);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Other defs with body may inherit generic parameters from its parent, but never have their
|
|
// own generic parameters.
|
|
if let hir::DefWithBody::Function(it) = body {
|
|
let (params, clauses) = get_bounds_in_scope(ctx, it);
|
|
generic_params.extend(params);
|
|
where_clauses.extend(clauses);
|
|
}
|
|
|
|
(generic_params, where_clauses)
|
|
}
|
|
|
|
fn containing_body(ctx: &AssistContext<'_>) -> Option<hir::DefWithBody> {
|
|
let item: ast::Item = ctx.find_node_at_offset()?;
|
|
let def = match item {
|
|
ast::Item::Fn(it) => ctx.sema.to_def(&it)?.into(),
|
|
ast::Item::Const(it) => ctx.sema.to_def(&it)?.into(),
|
|
ast::Item::Static(it) => ctx.sema.to_def(&it)?.into(),
|
|
_ => return None,
|
|
};
|
|
Some(def)
|
|
}
|
|
|
|
fn get_bounds_in_scope<D>(
|
|
ctx: &AssistContext<'_>,
|
|
def: D,
|
|
) -> (impl Iterator<Item = ast::GenericParam>, impl Iterator<Item = ast::WherePred>)
|
|
where
|
|
D: HasSource,
|
|
D::Ast: HasGenericParams,
|
|
{
|
|
// This function should be only called with `Impl`, `Trait`, or `Function`, for which it's
|
|
// infallible to get source ast.
|
|
let node = ctx.sema.source(def).unwrap().value;
|
|
let generic_params = node.generic_param_list().into_iter().flat_map(|it| it.generic_params());
|
|
let where_clauses = node.where_clause().into_iter().flat_map(|it| it.predicates());
|
|
(generic_params, where_clauses)
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
struct ParamBoundWithParams {
|
|
node: ast::GenericParam,
|
|
/// Generic parameter `node` introduces.
|
|
///
|
|
/// ```text
|
|
/// impl<T> S<T> {
|
|
/// fn f<U: Trait<T>>() {}
|
|
/// ^ this
|
|
/// }
|
|
/// ```
|
|
///
|
|
/// `U` in this example.
|
|
self_ty_param: hir::GenericParam,
|
|
/// Generic parameters contained in the trait reference of this bound.
|
|
///
|
|
/// ```text
|
|
/// impl<T> S<T> {
|
|
/// fn f<U: Trait<T>>() {}
|
|
/// ^^^^^^^^ params in this part
|
|
/// }
|
|
/// ```
|
|
///
|
|
/// `T` in this example.
|
|
other_params: FxHashSet<hir::GenericParam>,
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
struct WherePredWithParams {
|
|
node: ast::WherePred,
|
|
/// Generic parameters contained in the "self type" of this where predicate.
|
|
///
|
|
/// ```text
|
|
/// Struct<T, U>: Trait<T, Assoc = V>,
|
|
/// ^^^^^^^^^^^^ params in this part
|
|
/// ```
|
|
///
|
|
/// `T` and `U` in this example.
|
|
self_ty_params: FxHashSet<hir::GenericParam>,
|
|
/// Generic parameters contained in the trait reference of this where predicate.
|
|
///
|
|
/// ```text
|
|
/// Struct<T, U>: Trait<T, Assoc = V>,
|
|
/// ^^^^^^^^^^^^^^^^^^^ params in this part
|
|
/// ```
|
|
///
|
|
/// `T` and `V` in this example.
|
|
other_params: FxHashSet<hir::GenericParam>,
|
|
}
|
|
|
|
fn compute_contained_params_in_generic_param(
|
|
ctx: &AssistContext<'_>,
|
|
node: ast::GenericParam,
|
|
) -> Option<ParamBoundWithParams> {
|
|
match &node {
|
|
ast::GenericParam::TypeParam(ty) => {
|
|
let self_ty_param = ctx.sema.to_def(ty)?.into();
|
|
|
|
let other_params = ty
|
|
.type_bound_list()
|
|
.into_iter()
|
|
.flat_map(|it| it.bounds())
|
|
.flat_map(|bound| bound.syntax().descendants())
|
|
.filter_map(|node| filter_generic_params(ctx, node))
|
|
.collect();
|
|
|
|
Some(ParamBoundWithParams { node, self_ty_param, other_params })
|
|
}
|
|
ast::GenericParam::ConstParam(ct) => {
|
|
let self_ty_param = ctx.sema.to_def(ct)?.into();
|
|
Some(ParamBoundWithParams { node, self_ty_param, other_params: FxHashSet::default() })
|
|
}
|
|
ast::GenericParam::LifetimeParam(_) => {
|
|
// FIXME: It might be a good idea to handle lifetime parameters too.
|
|
None
|
|
}
|
|
}
|
|
}
|
|
|
|
fn compute_contained_params_in_where_pred(
|
|
ctx: &AssistContext<'_>,
|
|
node: ast::WherePred,
|
|
) -> Option<WherePredWithParams> {
|
|
let self_ty = node.ty()?;
|
|
let bound_list = node.type_bound_list()?;
|
|
|
|
let self_ty_params = self_ty
|
|
.syntax()
|
|
.descendants()
|
|
.filter_map(|node| filter_generic_params(ctx, node))
|
|
.collect();
|
|
|
|
let other_params = bound_list
|
|
.bounds()
|
|
.flat_map(|bound| bound.syntax().descendants())
|
|
.filter_map(|node| filter_generic_params(ctx, node))
|
|
.collect();
|
|
|
|
Some(WherePredWithParams { node, self_ty_params, other_params })
|
|
}
|
|
|
|
fn filter_generic_params(ctx: &AssistContext<'_>, node: SyntaxNode) -> Option<hir::GenericParam> {
|
|
let path = ast::Path::cast(node)?;
|
|
match ctx.sema.resolve_path(&path)? {
|
|
PathResolution::TypeParam(it) => Some(it.into()),
|
|
PathResolution::ConstParam(it) => Some(it.into()),
|
|
_ => None,
|
|
}
|
|
}
|
|
|
|
/// Filters out irrelevant bounds from `generic_params` and `where_preds`.
|
|
///
|
|
/// Say we have a trait bound `Struct<T>: Trait<U>`. Given `necessary_params`, when is it relevant
|
|
/// and when not? Some observations:
|
|
/// - When `necessary_params` contains `T`, it's likely that we want this bound, but now we have
|
|
/// an extra param to consider: `U`.
|
|
/// - On the other hand, when `necessary_params` contains `U` (but not `T`), then it's unlikely
|
|
/// that we want this bound because it doesn't really constrain `U`.
|
|
///
|
|
/// (FIXME?: The latter clause might be overstating. We may want to include the bound if the self
|
|
/// type does *not* include generic params at all - like `Option<i32>: From<U>`)
|
|
///
|
|
/// Can we make this a bit more formal? Let's define "dependency" between generic parameters and
|
|
/// trait bounds:
|
|
/// - A generic parameter `T` depends on a trait bound if `T` appears in the self type (i.e. left
|
|
/// part) of the bound.
|
|
/// - A trait bound depends on a generic parameter `T` if `T` appears in the bound.
|
|
///
|
|
/// Using the notion, what we want is all the bounds that params in `necessary_params`
|
|
/// *transitively* depend on!
|
|
///
|
|
/// Now it's not hard to solve: we build a dependency graph and compute all reachable nodes from
|
|
/// nodes that represent params in `necessary_params` by usual and boring DFS.
|
|
///
|
|
/// The time complexity is O(|generic_params| + |where_preds| + |necessary_params|).
|
|
fn filter_unnecessary_bounds(
|
|
generic_params: &mut Vec<ParamBoundWithParams>,
|
|
where_preds: &mut Vec<WherePredWithParams>,
|
|
necessary_params: FxHashSet<hir::GenericParam>,
|
|
) {
|
|
// All `self_ty_param` should be unique as they were collected from `ast::GenericParamList`s.
|
|
let param_map: FxHashMap<hir::GenericParam, usize> =
|
|
generic_params.iter().map(|it| it.self_ty_param).zip(0..).collect();
|
|
let param_count = param_map.len();
|
|
let generic_params_upper_bound = param_count + generic_params.len();
|
|
let node_count = generic_params_upper_bound + where_preds.len();
|
|
|
|
// | node index range | what the node represents |
|
|
// |-----------------------------------------|--------------------------|
|
|
// | 0..param_count | generic parameter |
|
|
// | param_count..generic_params_upper_bound | `ast::GenericParam` |
|
|
// | generic_params_upper_bound..node_count | `ast::WherePred` |
|
|
let mut graph = Graph::new(node_count);
|
|
for (pred, pred_idx) in generic_params.iter().zip(param_count..) {
|
|
let param_idx = param_map[&pred.self_ty_param];
|
|
graph.add_edge(param_idx, pred_idx);
|
|
graph.add_edge(pred_idx, param_idx);
|
|
|
|
for param in &pred.other_params {
|
|
let param_idx = param_map[param];
|
|
graph.add_edge(pred_idx, param_idx);
|
|
}
|
|
}
|
|
for (pred, pred_idx) in where_preds.iter().zip(generic_params_upper_bound..) {
|
|
for param in &pred.self_ty_params {
|
|
let param_idx = param_map[param];
|
|
graph.add_edge(param_idx, pred_idx);
|
|
graph.add_edge(pred_idx, param_idx);
|
|
}
|
|
for param in &pred.other_params {
|
|
let param_idx = param_map[param];
|
|
graph.add_edge(pred_idx, param_idx);
|
|
}
|
|
}
|
|
|
|
let starting_nodes = necessary_params.iter().map(|param| param_map[param]);
|
|
let reachable = graph.compute_reachable_nodes(starting_nodes);
|
|
|
|
// Not pretty, but effective. If only there were `Vec::retain_index()`...
|
|
let mut idx = param_count;
|
|
generic_params.retain(|_| {
|
|
idx += 1;
|
|
reachable[idx - 1]
|
|
});
|
|
stdx::always!(idx == generic_params_upper_bound, "inconsistent index");
|
|
where_preds.retain(|_| {
|
|
idx += 1;
|
|
reachable[idx - 1]
|
|
});
|
|
}
|
|
|
|
/// Filters out bounds from impl if we're generating the function into the same impl we're
|
|
/// generating from.
|
|
fn filter_bounds_in_scope(
|
|
generic_params: &mut Vec<ParamBoundWithParams>,
|
|
where_preds: &mut Vec<WherePredWithParams>,
|
|
ctx: &AssistContext<'_>,
|
|
target: &GeneratedFunctionTarget,
|
|
) -> Option<()> {
|
|
let target_impl = target.parent().ancestors().find_map(ast::Impl::cast)?;
|
|
let target_impl = ctx.sema.to_def(&target_impl)?;
|
|
// It's sufficient to test only the first element of `generic_params` because of the order of
|
|
// insertion (see `relevant_parmas_and_where_clauses()`).
|
|
let def = generic_params.first()?.self_ty_param.parent();
|
|
if def != hir::GenericDef::Impl(target_impl) {
|
|
return None;
|
|
}
|
|
|
|
// Now we know every element that belongs to an impl would be in scope at `target`, we can
|
|
// filter them out just by lookint at their parent.
|
|
generic_params.retain(|it| !matches!(it.self_ty_param.parent(), hir::GenericDef::Impl(_)));
|
|
where_preds.retain(|it| {
|
|
it.node.syntax().parent().and_then(|it| it.parent()).and_then(ast::Impl::cast).is_none()
|
|
});
|
|
|
|
Some(())
|
|
}
|
|
|
|
/// Makes duplicate argument names unique by appending incrementing numbers.
|
|
///
|
|
/// ```
|
|
/// let mut names: Vec<String> =
|
|
/// vec!["foo".into(), "foo".into(), "bar".into(), "baz".into(), "bar".into()];
|
|
/// deduplicate_arg_names(&mut names);
|
|
/// let expected: Vec<String> =
|
|
/// vec!["foo_1".into(), "foo_2".into(), "bar_1".into(), "baz".into(), "bar_2".into()];
|
|
/// assert_eq!(names, expected);
|
|
/// ```
|
|
fn deduplicate_arg_names(arg_names: &mut [String]) {
|
|
let mut arg_name_counts = FxHashMap::default();
|
|
for name in arg_names.iter() {
|
|
*arg_name_counts.entry(name).or_insert(0) += 1;
|
|
}
|
|
let duplicate_arg_names: FxHashSet<String> = arg_name_counts
|
|
.into_iter()
|
|
.filter(|(_, count)| *count >= 2)
|
|
.map(|(name, _)| name.clone())
|
|
.collect();
|
|
|
|
let mut counter_per_name = FxHashMap::default();
|
|
for arg_name in arg_names.iter_mut() {
|
|
if duplicate_arg_names.contains(arg_name) {
|
|
let counter = counter_per_name.entry(arg_name.clone()).or_insert(1);
|
|
arg_name.push('_');
|
|
arg_name.push_str(&counter.to_string());
|
|
*counter += 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
fn fn_arg_name(sema: &Semantics<'_, RootDatabase>, arg_expr: &ast::Expr) -> String {
|
|
let name = (|| match arg_expr {
|
|
ast::Expr::CastExpr(cast_expr) => Some(fn_arg_name(sema, &cast_expr.expr()?)),
|
|
expr => {
|
|
let name_ref = expr
|
|
.syntax()
|
|
.descendants()
|
|
.filter_map(ast::NameRef::cast)
|
|
.filter(|name| name.ident_token().is_some())
|
|
.last()?;
|
|
if let Some(NameRefClass::Definition(Definition::Const(_) | Definition::Static(_))) =
|
|
NameRefClass::classify(sema, &name_ref)
|
|
{
|
|
return Some(name_ref.to_string().to_lowercase());
|
|
};
|
|
Some(to_lower_snake_case(&name_ref.to_string()))
|
|
}
|
|
})();
|
|
match name {
|
|
Some(mut name) if name.starts_with(|c: char| c.is_ascii_digit()) => {
|
|
name.insert_str(0, "arg");
|
|
name
|
|
}
|
|
Some(name) => name,
|
|
None => "arg".to_string(),
|
|
}
|
|
}
|
|
|
|
fn fn_arg_type(
|
|
ctx: &AssistContext<'_>,
|
|
target_module: Module,
|
|
fn_arg: &ast::Expr,
|
|
generic_params: &mut FxHashSet<hir::GenericParam>,
|
|
) -> String {
|
|
fn maybe_displayed_type(
|
|
ctx: &AssistContext<'_>,
|
|
target_module: Module,
|
|
fn_arg: &ast::Expr,
|
|
generic_params: &mut FxHashSet<hir::GenericParam>,
|
|
) -> Option<String> {
|
|
let ty = ctx.sema.type_of_expr(fn_arg)?.adjusted();
|
|
if ty.is_unknown() {
|
|
return None;
|
|
}
|
|
|
|
generic_params.extend(ty.generic_params(ctx.db()));
|
|
|
|
if ty.is_reference() || ty.is_mutable_reference() {
|
|
let famous_defs = &FamousDefs(&ctx.sema, ctx.sema.scope(fn_arg.syntax())?.krate());
|
|
convert_reference_type(ty.strip_references(), ctx.db(), famous_defs)
|
|
.map(|conversion| conversion.convert_type(ctx.db()))
|
|
.or_else(|| ty.display_source_code(ctx.db(), target_module.into()).ok())
|
|
} else {
|
|
ty.display_source_code(ctx.db(), target_module.into()).ok()
|
|
}
|
|
}
|
|
|
|
maybe_displayed_type(ctx, target_module, fn_arg, generic_params)
|
|
.unwrap_or_else(|| String::from("_"))
|
|
}
|
|
|
|
/// Returns the position inside the current mod or file
|
|
/// directly after the current block
|
|
/// We want to write the generated function directly after
|
|
/// fns, impls or macro calls, but inside mods
|
|
fn next_space_for_fn_after_call_site(expr: ast::CallableExpr) -> Option<GeneratedFunctionTarget> {
|
|
let mut ancestors = expr.syntax().ancestors().peekable();
|
|
let mut last_ancestor: Option<SyntaxNode> = None;
|
|
while let Some(next_ancestor) = ancestors.next() {
|
|
match next_ancestor.kind() {
|
|
SyntaxKind::SOURCE_FILE => {
|
|
break;
|
|
}
|
|
SyntaxKind::ITEM_LIST => {
|
|
if ancestors.peek().map(|a| a.kind()) == Some(SyntaxKind::MODULE) {
|
|
break;
|
|
}
|
|
}
|
|
_ => {}
|
|
}
|
|
last_ancestor = Some(next_ancestor);
|
|
}
|
|
last_ancestor.map(GeneratedFunctionTarget::BehindItem)
|
|
}
|
|
|
|
fn next_space_for_fn_in_module(
|
|
db: &dyn hir::db::AstDatabase,
|
|
module_source: &hir::InFile<hir::ModuleSource>,
|
|
) -> Option<(FileId, GeneratedFunctionTarget)> {
|
|
let file = module_source.file_id.original_file(db);
|
|
let assist_item = match &module_source.value {
|
|
hir::ModuleSource::SourceFile(it) => match it.items().last() {
|
|
Some(last_item) => GeneratedFunctionTarget::BehindItem(last_item.syntax().clone()),
|
|
None => GeneratedFunctionTarget::BehindItem(it.syntax().clone()),
|
|
},
|
|
hir::ModuleSource::Module(it) => match it.item_list().and_then(|it| it.items().last()) {
|
|
Some(last_item) => GeneratedFunctionTarget::BehindItem(last_item.syntax().clone()),
|
|
None => GeneratedFunctionTarget::InEmptyItemList(it.item_list()?.syntax().clone()),
|
|
},
|
|
hir::ModuleSource::BlockExpr(it) => {
|
|
if let Some(last_item) =
|
|
it.statements().take_while(|stmt| matches!(stmt, ast::Stmt::Item(_))).last()
|
|
{
|
|
GeneratedFunctionTarget::BehindItem(last_item.syntax().clone())
|
|
} else {
|
|
GeneratedFunctionTarget::InEmptyItemList(it.syntax().clone())
|
|
}
|
|
}
|
|
};
|
|
Some((file, assist_item))
|
|
}
|
|
|
|
fn next_space_for_fn_in_impl(impl_: &ast::Impl) -> Option<GeneratedFunctionTarget> {
|
|
let assoc_item_list = impl_.assoc_item_list()?;
|
|
if let Some(last_item) = assoc_item_list.assoc_items().last() {
|
|
Some(GeneratedFunctionTarget::BehindItem(last_item.syntax().clone()))
|
|
} else {
|
|
Some(GeneratedFunctionTarget::InEmptyItemList(assoc_item_list.syntax().clone()))
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Copy)]
|
|
enum Visibility {
|
|
None,
|
|
Crate,
|
|
Pub,
|
|
}
|
|
|
|
fn calculate_necessary_visibility(
|
|
current_module: Module,
|
|
target_module: Module,
|
|
ctx: &AssistContext<'_>,
|
|
) -> Visibility {
|
|
let db = ctx.db();
|
|
let current_module = current_module.nearest_non_block_module(db);
|
|
let target_module = target_module.nearest_non_block_module(db);
|
|
|
|
if target_module.krate() != current_module.krate() {
|
|
Visibility::Pub
|
|
} else if current_module.path_to_root(db).contains(&target_module) {
|
|
Visibility::None
|
|
} else {
|
|
Visibility::Crate
|
|
}
|
|
}
|
|
|
|
// This is never intended to be used as a generic graph strucuture. If there's ever another need of
|
|
// graph algorithm, consider adding a library for that (and replace the following).
|
|
/// Minimally implemented directed graph structure represented by adjacency list.
|
|
struct Graph {
|
|
edges: Vec<Vec<usize>>,
|
|
}
|
|
|
|
impl Graph {
|
|
fn new(node_count: usize) -> Self {
|
|
Self { edges: vec![Vec::new(); node_count] }
|
|
}
|
|
|
|
fn add_edge(&mut self, from: usize, to: usize) {
|
|
self.edges[from].push(to);
|
|
}
|
|
|
|
fn edges_for(&self, node_idx: usize) -> &[usize] {
|
|
&self.edges[node_idx]
|
|
}
|
|
|
|
fn len(&self) -> usize {
|
|
self.edges.len()
|
|
}
|
|
|
|
fn compute_reachable_nodes(
|
|
&self,
|
|
starting_nodes: impl IntoIterator<Item = usize>,
|
|
) -> Vec<bool> {
|
|
let mut visitor = Visitor::new(self);
|
|
for idx in starting_nodes {
|
|
visitor.mark_reachable(idx);
|
|
}
|
|
visitor.visited
|
|
}
|
|
}
|
|
|
|
struct Visitor<'g> {
|
|
graph: &'g Graph,
|
|
visited: Vec<bool>,
|
|
// Stack is held in this struct so we can reuse its buffer.
|
|
stack: Vec<usize>,
|
|
}
|
|
|
|
impl<'g> Visitor<'g> {
|
|
fn new(graph: &'g Graph) -> Self {
|
|
let visited = vec![false; graph.len()];
|
|
Self { graph, visited, stack: Vec::new() }
|
|
}
|
|
|
|
fn mark_reachable(&mut self, start_idx: usize) {
|
|
// non-recursive DFS
|
|
stdx::always!(self.stack.is_empty());
|
|
|
|
self.stack.push(start_idx);
|
|
while let Some(idx) = self.stack.pop() {
|
|
if !self.visited[idx] {
|
|
self.visited[idx] = true;
|
|
for &neighbor in self.graph.edges_for(idx) {
|
|
if !self.visited[neighbor] {
|
|
self.stack.push(neighbor);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use crate::tests::{check_assist, check_assist_not_applicable};
|
|
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn add_function_with_no_args() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn foo() {
|
|
bar$0();
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
bar();
|
|
}
|
|
|
|
fn bar() ${0:-> _} {
|
|
todo!()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_from_method() {
|
|
// This ensures that the function is correctly generated
|
|
// in the next outer mod or file
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
impl Foo {
|
|
fn foo() {
|
|
bar$0();
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
impl Foo {
|
|
fn foo() {
|
|
bar();
|
|
}
|
|
}
|
|
|
|
fn bar() ${0:-> _} {
|
|
todo!()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_directly_after_current_block() {
|
|
// The new fn should not be created at the end of the file or module
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn foo1() {
|
|
bar$0();
|
|
}
|
|
|
|
fn foo2() {}
|
|
",
|
|
r"
|
|
fn foo1() {
|
|
bar();
|
|
}
|
|
|
|
fn bar() ${0:-> _} {
|
|
todo!()
|
|
}
|
|
|
|
fn foo2() {}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_no_args_in_same_module() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
mod baz {
|
|
fn foo() {
|
|
bar$0();
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
mod baz {
|
|
fn foo() {
|
|
bar();
|
|
}
|
|
|
|
fn bar() ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_upper_camel_case_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct BazBaz;
|
|
fn foo() {
|
|
bar$0(BazBaz);
|
|
}
|
|
",
|
|
r"
|
|
struct BazBaz;
|
|
fn foo() {
|
|
bar(BazBaz);
|
|
}
|
|
|
|
fn bar(baz_baz: BazBaz) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_upper_camel_case_arg_as_cast() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct BazBaz;
|
|
fn foo() {
|
|
bar$0(&BazBaz as *const BazBaz);
|
|
}
|
|
",
|
|
r"
|
|
struct BazBaz;
|
|
fn foo() {
|
|
bar(&BazBaz as *const BazBaz);
|
|
}
|
|
|
|
fn bar(baz_baz: *const BazBaz) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_function_call_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct Baz;
|
|
fn baz() -> Baz { todo!() }
|
|
fn foo() {
|
|
bar$0(baz());
|
|
}
|
|
",
|
|
r"
|
|
struct Baz;
|
|
fn baz() -> Baz { todo!() }
|
|
fn foo() {
|
|
bar(baz());
|
|
}
|
|
|
|
fn bar(baz: Baz) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_method_call_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct Baz;
|
|
impl Baz {
|
|
fn foo(&self) -> Baz {
|
|
ba$0r(self.baz())
|
|
}
|
|
fn baz(&self) -> Baz {
|
|
Baz
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
struct Baz;
|
|
impl Baz {
|
|
fn foo(&self) -> Baz {
|
|
bar(self.baz())
|
|
}
|
|
fn baz(&self) -> Baz {
|
|
Baz
|
|
}
|
|
}
|
|
|
|
fn bar(baz: Baz) -> Baz {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_string_literal_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r#"
|
|
fn foo() {
|
|
$0bar("bar")
|
|
}
|
|
"#,
|
|
r#"
|
|
fn foo() {
|
|
bar("bar")
|
|
}
|
|
|
|
fn bar(arg: &str) {
|
|
${0:todo!()}
|
|
}
|
|
"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_char_literal_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r#"
|
|
fn foo() {
|
|
$0bar('x')
|
|
}
|
|
"#,
|
|
r#"
|
|
fn foo() {
|
|
bar('x')
|
|
}
|
|
|
|
fn bar(arg: char) {
|
|
${0:todo!()}
|
|
}
|
|
"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_int_literal_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn foo() {
|
|
$0bar(42)
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
bar(42)
|
|
}
|
|
|
|
fn bar(arg: i32) {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_cast_int_literal_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn foo() {
|
|
$0bar(42 as u8)
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
bar(42 as u8)
|
|
}
|
|
|
|
fn bar(arg: u8) {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn name_of_cast_variable_is_used() {
|
|
// Ensures that the name of the cast type isn't used
|
|
// in the generated function signature.
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn foo() {
|
|
let x = 42;
|
|
bar$0(x as u8)
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
let x = 42;
|
|
bar(x as u8)
|
|
}
|
|
|
|
fn bar(x: u8) {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_variable_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn foo() {
|
|
let worble = ();
|
|
$0bar(worble)
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
let worble = ();
|
|
bar(worble)
|
|
}
|
|
|
|
fn bar(worble: ()) {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_impl_trait_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r#"
|
|
//- minicore: sized
|
|
trait Foo {}
|
|
fn foo() -> impl Foo {
|
|
todo!()
|
|
}
|
|
fn baz() {
|
|
$0bar(foo())
|
|
}
|
|
"#,
|
|
r#"
|
|
trait Foo {}
|
|
fn foo() -> impl Foo {
|
|
todo!()
|
|
}
|
|
fn baz() {
|
|
bar(foo())
|
|
}
|
|
|
|
fn bar(foo: impl Foo) {
|
|
${0:todo!()}
|
|
}
|
|
"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn borrowed_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct Baz;
|
|
fn baz() -> Baz { todo!() }
|
|
|
|
fn foo() {
|
|
bar$0(&baz())
|
|
}
|
|
",
|
|
r"
|
|
struct Baz;
|
|
fn baz() -> Baz { todo!() }
|
|
|
|
fn foo() {
|
|
bar(&baz())
|
|
}
|
|
|
|
fn bar(baz: &Baz) {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_qualified_path_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
mod Baz {
|
|
pub struct Bof;
|
|
pub fn baz() -> Bof { Bof }
|
|
}
|
|
fn foo() {
|
|
$0bar(Baz::baz())
|
|
}
|
|
",
|
|
r"
|
|
mod Baz {
|
|
pub struct Bof;
|
|
pub fn baz() -> Bof { Bof }
|
|
}
|
|
fn foo() {
|
|
bar(Baz::baz())
|
|
}
|
|
|
|
fn bar(baz: Baz::Bof) {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn generate_function_with_generic_param() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn foo<T, const N: usize>(t: [T; N]) { $0bar(t) }
|
|
",
|
|
r"
|
|
fn foo<T, const N: usize>(t: [T; N]) { bar(t) }
|
|
|
|
fn bar<T, const N: usize>(t: [T; N]) {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn generate_function_with_parent_generic_param() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct S<T>(T);
|
|
impl<T> S<T> {
|
|
fn foo<U>(t: T, u: U) { $0bar(t, u) }
|
|
}
|
|
",
|
|
r"
|
|
struct S<T>(T);
|
|
impl<T> S<T> {
|
|
fn foo<U>(t: T, u: U) { bar(t, u) }
|
|
}
|
|
|
|
fn bar<T, U>(t: T, u: U) {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn generic_param_in_receiver_type() {
|
|
// FIXME: Generic parameter `T` should be part of impl, not method.
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct S<T>(T);
|
|
fn foo<T, U>(s: S<T>, u: U) { s.$0foo(u) }
|
|
",
|
|
r"
|
|
struct S<T>(T);
|
|
impl S {
|
|
fn foo<T, U>(&self, u: U) {
|
|
${0:todo!()}
|
|
}
|
|
}
|
|
fn foo<T, U>(s: S<T>, u: U) { s.foo(u) }
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn generic_param_in_return_type() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn foo<T, const N: usize>() -> [T; N] { $0bar() }
|
|
",
|
|
r"
|
|
fn foo<T, const N: usize>() -> [T; N] { bar() }
|
|
|
|
fn bar<T, const N: usize>() -> [T; N] {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn generate_fn_with_bounds() {
|
|
// FIXME: where predicates should be on next lines.
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
trait A<T> {}
|
|
struct S<T>(T);
|
|
impl<T: A<i32>> S<T>
|
|
where
|
|
T: A<i64>,
|
|
{
|
|
fn foo<U>(t: T, u: U)
|
|
where
|
|
T: A<()>,
|
|
U: A<i32> + A<i64>,
|
|
{
|
|
$0bar(t, u)
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
trait A<T> {}
|
|
struct S<T>(T);
|
|
impl<T: A<i32>> S<T>
|
|
where
|
|
T: A<i64>,
|
|
{
|
|
fn foo<U>(t: T, u: U)
|
|
where
|
|
T: A<()>,
|
|
U: A<i32> + A<i64>,
|
|
{
|
|
bar(t, u)
|
|
}
|
|
}
|
|
|
|
fn bar<T: A<i32>, U>(t: T, u: U) where T: A<i64>, T: A<()>, U: A<i32> + A<i64> {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn include_transitive_param_dependency() {
|
|
// FIXME: where predicates should be on next lines.
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
trait A<T> { type Assoc; }
|
|
trait B { type Item; }
|
|
struct S<T>(T);
|
|
impl<T, U, V: B, W> S<(T, U, V, W)>
|
|
where
|
|
T: A<U, Assoc = V>,
|
|
S<V::Item>: A<U, Assoc = W>,
|
|
{
|
|
fn foo<I>(t: T, u: U)
|
|
where
|
|
U: A<T, Assoc = I>,
|
|
{
|
|
$0bar(u)
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
trait A<T> { type Assoc; }
|
|
trait B { type Item; }
|
|
struct S<T>(T);
|
|
impl<T, U, V: B, W> S<(T, U, V, W)>
|
|
where
|
|
T: A<U, Assoc = V>,
|
|
S<V::Item>: A<U, Assoc = W>,
|
|
{
|
|
fn foo<I>(t: T, u: U)
|
|
where
|
|
U: A<T, Assoc = I>,
|
|
{
|
|
bar(u)
|
|
}
|
|
}
|
|
|
|
fn bar<T, U, V: B, W, I>(u: U) where T: A<U, Assoc = V>, S<V::Item>: A<U, Assoc = W>, U: A<T, Assoc = I> {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn irrelevant_bounds_are_filtered_out() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
trait A<T> {}
|
|
struct S<T>(T);
|
|
impl<T, U, V, W> S<(T, U, V, W)>
|
|
where
|
|
T: A<U>,
|
|
V: A<W>,
|
|
{
|
|
fn foo<I>(t: T, u: U)
|
|
where
|
|
U: A<T> + A<I>,
|
|
{
|
|
$0bar(u)
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
trait A<T> {}
|
|
struct S<T>(T);
|
|
impl<T, U, V, W> S<(T, U, V, W)>
|
|
where
|
|
T: A<U>,
|
|
V: A<W>,
|
|
{
|
|
fn foo<I>(t: T, u: U)
|
|
where
|
|
U: A<T> + A<I>,
|
|
{
|
|
bar(u)
|
|
}
|
|
}
|
|
|
|
fn bar<T, U, I>(u: U) where T: A<U>, U: A<T> + A<I> {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn params_in_trait_arg_are_not_dependency() {
|
|
// Even though `bar` depends on `U` and `I`, we don't have to copy these bounds:
|
|
// `T: A<I>` and `T: A<U>`.
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
trait A<T> {}
|
|
struct S<T>(T);
|
|
impl<T, U> S<(T, U)>
|
|
where
|
|
T: A<U>,
|
|
{
|
|
fn foo<I>(t: T, u: U)
|
|
where
|
|
T: A<I>,
|
|
U: A<I>,
|
|
{
|
|
$0bar(u)
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
trait A<T> {}
|
|
struct S<T>(T);
|
|
impl<T, U> S<(T, U)>
|
|
where
|
|
T: A<U>,
|
|
{
|
|
fn foo<I>(t: T, u: U)
|
|
where
|
|
T: A<I>,
|
|
U: A<I>,
|
|
{
|
|
bar(u)
|
|
}
|
|
}
|
|
|
|
fn bar<U, I>(u: U) where U: A<I> {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn dont_copy_bounds_already_in_scope() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
trait A<T> {}
|
|
struct S<T>(T);
|
|
impl<T: A<i32>> S<T>
|
|
where
|
|
T: A<usize>,
|
|
{
|
|
fn foo<U: A<()>>(t: T, u: U)
|
|
where
|
|
T: A<S<i32>>,
|
|
{
|
|
Self::$0bar(t, u);
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
trait A<T> {}
|
|
struct S<T>(T);
|
|
impl<T: A<i32>> S<T>
|
|
where
|
|
T: A<usize>,
|
|
{
|
|
fn foo<U: A<()>>(t: T, u: U)
|
|
where
|
|
T: A<S<i32>>,
|
|
{
|
|
Self::bar(t, u);
|
|
}
|
|
|
|
fn bar<U: A<()>>(t: T, u: U) ${0:-> _} where T: A<S<i32>> {
|
|
todo!()
|
|
}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_fn_arg() {
|
|
// FIXME: The argument in `bar` is wrong.
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct Baz;
|
|
impl Baz {
|
|
fn new() -> Self { Baz }
|
|
}
|
|
fn foo() {
|
|
$0bar(Baz::new);
|
|
}
|
|
",
|
|
r"
|
|
struct Baz;
|
|
impl Baz {
|
|
fn new() -> Self { Baz }
|
|
}
|
|
fn foo() {
|
|
bar(Baz::new);
|
|
}
|
|
|
|
fn bar(new: fn) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_closure_arg() {
|
|
// FIXME: The argument in `bar` is wrong.
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn foo() {
|
|
let closure = |x: i64| x - 1;
|
|
$0bar(closure)
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
let closure = |x: i64| x - 1;
|
|
bar(closure)
|
|
}
|
|
|
|
fn bar(closure: _) {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn unresolveable_types_default_to_placeholder() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn foo() {
|
|
$0bar(baz)
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
bar(baz)
|
|
}
|
|
|
|
fn bar(baz: _) {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn arg_names_dont_overlap() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct Baz;
|
|
fn baz() -> Baz { Baz }
|
|
fn foo() {
|
|
$0bar(baz(), baz())
|
|
}
|
|
",
|
|
r"
|
|
struct Baz;
|
|
fn baz() -> Baz { Baz }
|
|
fn foo() {
|
|
bar(baz(), baz())
|
|
}
|
|
|
|
fn bar(baz_1: Baz, baz_2: Baz) {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn arg_name_counters_start_at_1_per_name() {
|
|
check_assist(
|
|
generate_function,
|
|
r#"
|
|
struct Baz;
|
|
fn baz() -> Baz { Baz }
|
|
fn foo() {
|
|
$0bar(baz(), baz(), "foo", "bar")
|
|
}
|
|
"#,
|
|
r#"
|
|
struct Baz;
|
|
fn baz() -> Baz { Baz }
|
|
fn foo() {
|
|
bar(baz(), baz(), "foo", "bar")
|
|
}
|
|
|
|
fn bar(baz_1: Baz, baz_2: Baz, arg_1: &str, arg_2: &str) {
|
|
${0:todo!()}
|
|
}
|
|
"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_in_module() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
mod bar {}
|
|
|
|
fn foo() {
|
|
bar::my_fn$0()
|
|
}
|
|
",
|
|
r"
|
|
mod bar {
|
|
pub(crate) fn my_fn() {
|
|
${0:todo!()}
|
|
}
|
|
}
|
|
|
|
fn foo() {
|
|
bar::my_fn()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn qualified_path_uses_correct_scope() {
|
|
check_assist(
|
|
generate_function,
|
|
r#"
|
|
mod foo {
|
|
pub struct Foo;
|
|
}
|
|
fn bar() {
|
|
use foo::Foo;
|
|
let foo = Foo;
|
|
baz$0(foo)
|
|
}
|
|
"#,
|
|
r#"
|
|
mod foo {
|
|
pub struct Foo;
|
|
}
|
|
fn bar() {
|
|
use foo::Foo;
|
|
let foo = Foo;
|
|
baz(foo)
|
|
}
|
|
|
|
fn baz(foo: foo::Foo) {
|
|
${0:todo!()}
|
|
}
|
|
"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn qualified_path_in_generic_bounds_uses_correct_scope() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
mod a {
|
|
pub trait A {};
|
|
}
|
|
pub mod b {
|
|
pub struct S<T>(T);
|
|
}
|
|
struct S<T>(T);
|
|
impl<T> S<T>
|
|
where
|
|
T: a::A,
|
|
{
|
|
fn foo<U: a::A>(t: b::S<T>, u: S<U>) {
|
|
a::$0bar(t, u);
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
mod a {
|
|
pub trait A {}
|
|
|
|
pub(crate) fn bar<T, U: self::A>(t: crate::b::S<T>, u: crate::S<U>) ${0:-> _} where T: self::A {
|
|
todo!()
|
|
};
|
|
}
|
|
pub mod b {
|
|
pub struct S<T>(T);
|
|
}
|
|
struct S<T>(T);
|
|
impl<T> S<T>
|
|
where
|
|
T: a::A,
|
|
{
|
|
fn foo<U: a::A>(t: b::S<T>, u: S<U>) {
|
|
a::bar(t, u);
|
|
}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
#[test]
|
|
fn add_function_in_module_containing_other_items() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
mod bar {
|
|
fn something_else() {}
|
|
}
|
|
|
|
fn foo() {
|
|
bar::my_fn$0()
|
|
}
|
|
",
|
|
r"
|
|
mod bar {
|
|
fn something_else() {}
|
|
|
|
pub(crate) fn my_fn() {
|
|
${0:todo!()}
|
|
}
|
|
}
|
|
|
|
fn foo() {
|
|
bar::my_fn()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_in_nested_module() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
mod bar {
|
|
pub mod baz {}
|
|
}
|
|
|
|
fn foo() {
|
|
bar::baz::my_fn$0()
|
|
}
|
|
",
|
|
r"
|
|
mod bar {
|
|
pub mod baz {
|
|
pub(crate) fn my_fn() {
|
|
${0:todo!()}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn foo() {
|
|
bar::baz::my_fn()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_in_another_file() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
//- /main.rs
|
|
mod foo;
|
|
|
|
fn main() {
|
|
foo::bar$0()
|
|
}
|
|
//- /foo.rs
|
|
",
|
|
r"
|
|
|
|
|
|
pub(crate) fn bar() {
|
|
${0:todo!()}
|
|
}",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_return_type() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn main() {
|
|
let x: u32 = foo$0();
|
|
}
|
|
",
|
|
r"
|
|
fn main() {
|
|
let x: u32 = foo();
|
|
}
|
|
|
|
fn foo() -> u32 {
|
|
${0:todo!()}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_not_applicable_if_function_already_exists() {
|
|
check_assist_not_applicable(
|
|
generate_function,
|
|
r"
|
|
fn foo() {
|
|
bar$0();
|
|
}
|
|
|
|
fn bar() {}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_not_applicable_if_unresolved_variable_in_call_is_selected() {
|
|
check_assist_not_applicable(
|
|
// bar is resolved, but baz isn't.
|
|
// The assist is only active if the cursor is on an unresolved path,
|
|
// but the assist should only be offered if the path is a function call.
|
|
generate_function,
|
|
r#"
|
|
fn foo() {
|
|
bar(b$0az);
|
|
}
|
|
|
|
fn bar(baz: ()) {}
|
|
"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_method_with_no_args() {
|
|
check_assist(
|
|
generate_function,
|
|
r#"
|
|
struct Foo;
|
|
impl Foo {
|
|
fn foo(&self) {
|
|
self.bar()$0;
|
|
}
|
|
}
|
|
"#,
|
|
r#"
|
|
struct Foo;
|
|
impl Foo {
|
|
fn foo(&self) {
|
|
self.bar();
|
|
}
|
|
|
|
fn bar(&self) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_function_with_async() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn foo() {
|
|
$0bar(42).await();
|
|
}
|
|
",
|
|
r"
|
|
fn foo() {
|
|
bar(42).await();
|
|
}
|
|
|
|
async fn bar(arg: i32) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_method() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct S;
|
|
fn foo() {S.bar$0();}
|
|
",
|
|
r"
|
|
struct S;
|
|
impl S {
|
|
fn bar(&self) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
fn foo() {S.bar();}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_method_within_an_impl() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct S;
|
|
fn foo() {S.bar$0();}
|
|
impl S {}
|
|
|
|
",
|
|
r"
|
|
struct S;
|
|
fn foo() {S.bar();}
|
|
impl S {
|
|
fn bar(&self) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_method_from_different_module() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
mod s {
|
|
pub struct S;
|
|
}
|
|
fn foo() {s::S.bar$0();}
|
|
",
|
|
r"
|
|
mod s {
|
|
pub struct S;
|
|
impl S {
|
|
pub(crate) fn bar(&self) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
}
|
|
fn foo() {s::S.bar();}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_method_from_descendant_module() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct S;
|
|
mod s {
|
|
fn foo() {
|
|
super::S.bar$0();
|
|
}
|
|
}
|
|
|
|
",
|
|
r"
|
|
struct S;
|
|
impl S {
|
|
fn bar(&self) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
mod s {
|
|
fn foo() {
|
|
super::S.bar();
|
|
}
|
|
}
|
|
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_method_with_cursor_anywhere_on_call_expresion() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct S;
|
|
fn foo() {$0S.bar();}
|
|
",
|
|
r"
|
|
struct S;
|
|
impl S {
|
|
fn bar(&self) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
fn foo() {S.bar();}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_static_method() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct S;
|
|
fn foo() {S::bar$0();}
|
|
",
|
|
r"
|
|
struct S;
|
|
impl S {
|
|
fn bar() ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
fn foo() {S::bar();}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_generic_static_method() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct S;
|
|
fn foo<T, const N: usize>(t: [T; N]) { S::bar$0(t); }
|
|
",
|
|
r"
|
|
struct S;
|
|
impl S {
|
|
fn bar<T, const N: usize>(t: [T; N]) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
fn foo<T, const N: usize>(t: [T; N]) { S::bar(t); }
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_static_method_within_an_impl() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct S;
|
|
fn foo() {S::bar$0();}
|
|
impl S {}
|
|
|
|
",
|
|
r"
|
|
struct S;
|
|
fn foo() {S::bar();}
|
|
impl S {
|
|
fn bar() ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_static_method_from_different_module() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
mod s {
|
|
pub struct S;
|
|
}
|
|
fn foo() {s::S::bar$0();}
|
|
",
|
|
r"
|
|
mod s {
|
|
pub struct S;
|
|
impl S {
|
|
pub(crate) fn bar() ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
}
|
|
fn foo() {s::S::bar();}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_static_method_with_cursor_anywhere_on_call_expresion() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct S;
|
|
fn foo() {$0S::bar();}
|
|
",
|
|
r"
|
|
struct S;
|
|
impl S {
|
|
fn bar() ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
fn foo() {S::bar();}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_static_method_within_an_impl_with_self_syntax() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct S;
|
|
impl S {
|
|
fn foo(&self) {
|
|
Self::bar$0();
|
|
}
|
|
}
|
|
",
|
|
r"
|
|
struct S;
|
|
impl S {
|
|
fn foo(&self) {
|
|
Self::bar();
|
|
}
|
|
|
|
fn bar() ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn no_panic_on_invalid_global_path() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn main() {
|
|
::foo$0();
|
|
}
|
|
",
|
|
r"
|
|
fn main() {
|
|
::foo();
|
|
}
|
|
|
|
fn foo() ${0:-> _} {
|
|
todo!()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn handle_tuple_indexing() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn main() {
|
|
let a = ((),);
|
|
foo$0(a.0);
|
|
}
|
|
",
|
|
r"
|
|
fn main() {
|
|
let a = ((),);
|
|
foo(a.0);
|
|
}
|
|
|
|
fn foo(a: ()) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_const_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
const VALUE: usize = 0;
|
|
fn main() {
|
|
foo$0(VALUE);
|
|
}
|
|
",
|
|
r"
|
|
const VALUE: usize = 0;
|
|
fn main() {
|
|
foo(VALUE);
|
|
}
|
|
|
|
fn foo(value: usize) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_static_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
static VALUE: usize = 0;
|
|
fn main() {
|
|
foo$0(VALUE);
|
|
}
|
|
",
|
|
r"
|
|
static VALUE: usize = 0;
|
|
fn main() {
|
|
foo(VALUE);
|
|
}
|
|
|
|
fn foo(value: usize) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn add_function_with_static_mut_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
static mut VALUE: usize = 0;
|
|
fn main() {
|
|
foo$0(VALUE);
|
|
}
|
|
",
|
|
r"
|
|
static mut VALUE: usize = 0;
|
|
fn main() {
|
|
foo(VALUE);
|
|
}
|
|
|
|
fn foo(value: usize) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn not_applicable_for_enum_variant() {
|
|
check_assist_not_applicable(
|
|
generate_function,
|
|
r"
|
|
enum Foo {}
|
|
fn main() {
|
|
Foo::Bar$0(true)
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn applicable_for_enum_method() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
enum Foo {}
|
|
fn main() {
|
|
Foo::new$0();
|
|
}
|
|
",
|
|
r"
|
|
enum Foo {}
|
|
impl Foo {
|
|
fn new() ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
fn main() {
|
|
Foo::new();
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn applicable_in_different_local_crate() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
//- /lib.rs crate:lib new_source_root:local
|
|
fn dummy() {}
|
|
//- /main.rs crate:main deps:lib new_source_root:local
|
|
fn main() {
|
|
lib::foo$0();
|
|
}
|
|
",
|
|
r"
|
|
fn dummy() {}
|
|
|
|
pub fn foo() ${0:-> _} {
|
|
todo!()
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn applicable_in_different_local_crate_method() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
//- /lib.rs crate:lib new_source_root:local
|
|
pub struct S;
|
|
//- /main.rs crate:main deps:lib new_source_root:local
|
|
fn main() {
|
|
lib::S.foo$0();
|
|
}
|
|
",
|
|
r"
|
|
pub struct S;
|
|
impl S {
|
|
pub fn foo(&self) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn not_applicable_in_different_library_crate() {
|
|
check_assist_not_applicable(
|
|
generate_function,
|
|
r"
|
|
//- /lib.rs crate:lib new_source_root:library
|
|
fn dummy() {}
|
|
//- /main.rs crate:main deps:lib new_source_root:local
|
|
fn main() {
|
|
lib::foo$0();
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn not_applicable_in_different_library_crate_method() {
|
|
check_assist_not_applicable(
|
|
generate_function,
|
|
r"
|
|
//- /lib.rs crate:lib new_source_root:library
|
|
pub struct S;
|
|
//- /main.rs crate:main deps:lib new_source_root:local
|
|
fn main() {
|
|
lib::S.foo$0();
|
|
}
|
|
",
|
|
);
|
|
}
|
|
}
|