1739 lines
36 KiB
Rust
1739 lines
36 KiB
Rust
use rustc_hash::{FxHashMap, FxHashSet};
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use hir::{HasSource, HirDisplay, Module, Semantics, TypeInfo};
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use ide_db::helpers::FamousDefs;
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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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helpers::SnippetCap,
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RootDatabase,
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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, HasModuleItem,
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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,
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utils::{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 target_module;
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let mut adt_name = None;
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let (target, file, insert_offset) = 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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target_module = Some(module);
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get_fn_target(ctx, &target_module, call.clone())?
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}
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Some(hir::PathResolution::Def(hir::ModuleDef::Adt(adt))) => {
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let current_module = current_module(call.syntax(), ctx)?;
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let module = adt.module(ctx.sema.db);
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target_module = if current_module == module { None } else { Some(module) };
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if current_module.krate() != module.krate() {
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return None;
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}
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let (impl_, file) = get_adt_source(ctx, &adt, fn_name)?;
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let (target, insert_offset) = get_method_target(ctx, &module, &impl_)?;
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adt_name = if impl_.is_none() { Some(adt.name(ctx.sema.db)) } else { None };
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(target, file, insert_offset)
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}
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_ => {
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return None;
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}
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},
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_ => {
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target_module = None;
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get_fn_target(ctx, &target_module, call.clone())?
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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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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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let fn_name = call.name_ref()?;
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let adt = ctx.sema.type_of_expr(&call.receiver()?)?.original().strip_references().as_adt()?;
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let current_module = current_module(call.syntax(), ctx)?;
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let target_module = adt.module(ctx.sema.db);
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if current_module.krate() != target_module.krate() {
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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, &target_module, &impl_)?;
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let function_builder =
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FunctionBuilder::from_method_call(ctx, &call, &fn_name, target_module, target)?;
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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 function_template = function_builder.render();
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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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func = format!("\nimpl {} {{\n{}\n}}", name, func);
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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 current_module(current_node: &SyntaxNode, ctx: &AssistContext) -> Option<Module> {
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ctx.sema.scope(current_node).module()
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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).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 f = match cap {
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Some(cap) => {
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let cursor = if self.should_focus_return_type {
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// Focus the return type if there is one
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match self.ret_type {
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Some(ref ret_type) => ret_type.syntax(),
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None => self.tail_expr.syntax(),
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}
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} else {
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self.tail_expr.syntax()
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};
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render_snippet(cap, self.fn_def.syntax(), Cursor::Replace(cursor))
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}
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None => self.fn_def.to_string(),
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};
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format!("{}{}{}", self.leading_ws, f, self.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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type_params: Option<ast::GenericParamList>,
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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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needs_pub: bool,
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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<hir::Module>,
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target: GeneratedFunctionTarget,
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) -> Option<Self> {
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let needs_pub = target_module.is_some();
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let target_module = target_module.or_else(|| current_module(target.syntax(), ctx))?;
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let fn_name = make::name(fn_name);
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let (type_params, params) =
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fn_args(ctx, target_module, ast::CallableExpr::Call(call.clone()))?;
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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) =
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make_return_type(ctx, &ast::Expr::CallExpr(call.clone()), target_module);
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Some(Self {
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target,
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fn_name,
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type_params,
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params,
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ret_type,
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should_focus_return_type,
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needs_pub,
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is_async,
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})
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}
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fn from_method_call(
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ctx: &AssistContext,
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call: &ast::MethodCallExpr,
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name: &ast::NameRef,
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target_module: Module,
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target: GeneratedFunctionTarget,
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) -> Option<Self> {
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let needs_pub =
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!module_is_descendant(¤t_module(call.syntax(), ctx)?, &target_module, ctx);
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let fn_name = make::name(&name.text());
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let (type_params, params) =
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fn_args(ctx, target_module, ast::CallableExpr::MethodCall(call.clone()))?;
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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) =
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make_return_type(ctx, &ast::Expr::MethodCallExpr(call.clone()), target_module);
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Some(Self {
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target,
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fn_name,
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type_params,
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params,
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ret_type,
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should_focus_return_type,
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needs_pub,
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is_async,
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})
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}
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fn render(self) -> FunctionTemplate {
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let placeholder_expr = make::ext::expr_todo();
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let fn_body = make::block_expr(vec![], Some(placeholder_expr));
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let visibility = if self.needs_pub { Some(make::visibility_pub_crate()) } else { None };
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let mut fn_def = make::fn_(
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visibility,
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self.fn_name,
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self.type_params,
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self.params,
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fn_body,
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self.ret_type,
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self.is_async,
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);
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let leading_ws;
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let trailing_ws;
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match self.target {
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GeneratedFunctionTarget::BehindItem(it) => {
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let indent = IndentLevel::from_node(&it);
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leading_ws = format!("\n\n{}", indent);
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fn_def = fn_def.indent(indent);
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trailing_ws = String::new();
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}
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GeneratedFunctionTarget::InEmptyItemList(it) => {
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let indent = IndentLevel::from_node(&it);
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leading_ws = format!("\n{}", indent + 1);
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fn_def = fn_def.indent(indent + 1);
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trailing_ws = format!("\n{}", indent);
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}
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};
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FunctionTemplate {
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leading_ws,
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ret_type: fn_def.ret_type(),
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// PANIC: we guarantee we always create a function body with a tail expr
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tail_expr: fn_def.body().unwrap().tail_expr().unwrap(),
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should_focus_return_type: self.should_focus_return_type,
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fn_def,
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trailing_ws,
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}
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}
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}
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/// Makes an optional return type along with whether the return type should be focused by the cursor.
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/// If we cannot infer what the return type should be, we create a placeholder type.
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///
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/// The rule for whether we focus a return type or not (and thus focus the function body),
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/// is rather simple:
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/// * If we could *not* infer what the return type should be, focus it (so the user can fill-in
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/// the correct return type).
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/// * If we could infer the return type, don't focus it (and thus focus the function body) so the
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/// user can change the `todo!` function body.
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fn make_return_type(
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ctx: &AssistContext,
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call: &ast::Expr,
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target_module: Module,
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) -> (Option<ast::RetType>, bool) {
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let (ret_ty, should_focus_return_type) = {
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match ctx.sema.type_of_expr(call).map(TypeInfo::original) {
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Some(ty) if ty.is_unknown() => (Some(make::ty_placeholder()), true),
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None => (Some(make::ty_placeholder()), true),
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Some(ty) if ty.is_unit() => (None, false),
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Some(ty) => {
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let rendered = ty.display_source_code(ctx.db(), target_module.into());
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match rendered {
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Ok(rendered) => (Some(make::ty(&rendered)), false),
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Err(_) => (Some(make::ty_placeholder()), true),
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}
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}
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}
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};
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let ret_type = ret_ty.map(make::ret_type);
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(ret_type, should_focus_return_type)
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}
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fn get_fn_target(
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ctx: &AssistContext,
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target_module: &Option<Module>,
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call: CallExpr,
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) -> Option<(GeneratedFunctionTarget, FileId, TextSize)> {
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let mut file = ctx.file_id();
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let target = match target_module {
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Some(target_module) => {
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let module_source = target_module.definition_source(ctx.db());
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let (in_file, target) = next_space_for_fn_in_module(ctx.sema.db, &module_source)?;
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file = in_file;
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target
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}
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None => next_space_for_fn_after_call_site(ast::CallableExpr::Call(call))?,
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};
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Some((target.clone(), file, get_insert_offset(&target)))
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}
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fn get_method_target(
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ctx: &AssistContext,
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target_module: &Module,
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impl_: &Option<ast::Impl>,
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) -> Option<(GeneratedFunctionTarget, TextSize)> {
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let target = match impl_ {
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Some(impl_) => next_space_for_fn_in_impl(impl_)?,
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None => {
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next_space_for_fn_in_module(ctx.sema.db, &target_module.definition_source(ctx.sema.db))?
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.1
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}
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};
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Some((target.clone(), get_insert_offset(&target)))
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}
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|
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fn get_insert_offset(target: &GeneratedFunctionTarget) -> TextSize {
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match &target {
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GeneratedFunctionTarget::BehindItem(it) => it.text_range().end(),
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GeneratedFunctionTarget::InEmptyItemList(it) => it.text_range().start() + TextSize::of('{'),
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}
|
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}
|
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|
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#[derive(Clone)]
|
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enum GeneratedFunctionTarget {
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BehindItem(SyntaxNode),
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InEmptyItemList(SyntaxNode),
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}
|
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|
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impl GeneratedFunctionTarget {
|
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fn syntax(&self) -> &SyntaxNode {
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match self {
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GeneratedFunctionTarget::BehindItem(it) => it,
|
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GeneratedFunctionTarget::InEmptyItemList(it) => it,
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}
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}
|
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}
|
|
|
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/// Computes the type variables and arguments required for the generated function
|
|
fn fn_args(
|
|
ctx: &AssistContext,
|
|
target_module: hir::Module,
|
|
call: ast::CallableExpr,
|
|
) -> Option<(Option<ast::GenericParamList>, ast::ParamList)> {
|
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let mut arg_names = Vec::new();
|
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let mut arg_types = Vec::new();
|
|
for arg in call.arg_list()?.args() {
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arg_names.push(fn_arg_name(&ctx.sema, &arg));
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arg_types.push(fn_arg_type(ctx, target_module, &arg));
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}
|
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deduplicate_arg_names(&mut arg_names);
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let params = arg_names.into_iter().zip(arg_types).map(|(name, ty)| {
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make::param(make::ext::simple_ident_pat(make::name(&name)).into(), make::ty(&ty))
|
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});
|
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|
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Some((
|
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None,
|
|
make::param_list(
|
|
match call {
|
|
ast::CallableExpr::Call(_) => None,
|
|
ast::CallableExpr::MethodCall(_) => Some(make::self_param()),
|
|
},
|
|
params,
|
|
),
|
|
))
|
|
}
|
|
|
|
/// Makes duplicate argument names unique by appending incrementing numbers.
|
|
///
|
|
/// ```
|
|
/// let mut names: Vec<String> =
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|
/// vec!["foo".into(), "foo".into(), "bar".into(), "baz".into(), "bar".into()];
|
|
/// deduplicate_arg_names(&mut names);
|
|
/// let expected: Vec<String> =
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/// 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 Vec<String>) {
|
|
let arg_name_counts = arg_names.iter().fold(FxHashMap::default(), |mut m, name| {
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*m.entry(name).or_insert(0) += 1;
|
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m
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});
|
|
let duplicate_arg_names: FxHashSet<String> = arg_name_counts
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.into_iter()
|
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.filter(|(_, count)| *count >= 2)
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.map(|(name, _)| name.clone())
|
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.collect();
|
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|
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let mut counter_per_name = FxHashMap::default();
|
|
for arg_name in arg_names.iter_mut() {
|
|
if duplicate_arg_names.contains(arg_name) {
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let counter = counter_per_name.entry(arg_name.clone()).or_insert(1);
|
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arg_name.push('_');
|
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arg_name.push_str(&counter.to_string());
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*counter += 1;
|
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}
|
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}
|
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}
|
|
|
|
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).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: hir::Module, fn_arg: &ast::Expr) -> String {
|
|
fn maybe_displayed_type(
|
|
ctx: &AssistContext,
|
|
target_module: hir::Module,
|
|
fn_arg: &ast::Expr,
|
|
) -> Option<String> {
|
|
let ty = ctx.sema.type_of_expr(fn_arg)?.adjusted();
|
|
if ty.is_unknown() {
|
|
return None;
|
|
}
|
|
|
|
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).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> {
|
|
if let Some(last_item) = impl_.assoc_item_list().and_then(|it| it.assoc_items().last()) {
|
|
Some(GeneratedFunctionTarget::BehindItem(last_item.syntax().clone()))
|
|
} else {
|
|
Some(GeneratedFunctionTarget::InEmptyItemList(impl_.assoc_item_list()?.syntax().clone()))
|
|
}
|
|
}
|
|
|
|
fn module_is_descendant(module: &hir::Module, ans: &hir::Module, ctx: &AssistContext) -> bool {
|
|
if module == ans {
|
|
return true;
|
|
}
|
|
for c in ans.children(ctx.sema.db) {
|
|
if module_is_descendant(module, &c, ctx) {
|
|
return true;
|
|
}
|
|
}
|
|
false
|
|
}
|
|
|
|
#[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 add_function_with_generic_arg() {
|
|
// FIXME: This is wrong, generated `bar` should include generic parameter.
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn foo<T>(t: T) {
|
|
$0bar(t)
|
|
}
|
|
",
|
|
r"
|
|
fn foo<T>(t: T) {
|
|
bar(t)
|
|
}
|
|
|
|
fn bar(t: T) {
|
|
${0: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 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 {
|
|
mod baz {}
|
|
}
|
|
|
|
fn foo() {
|
|
bar::baz::my_fn$0()
|
|
}
|
|
",
|
|
r"
|
|
mod bar {
|
|
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;
|
|
fn foo() {S.bar();}
|
|
impl S {
|
|
|
|
|
|
fn bar(&self) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[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;
|
|
mod s {
|
|
fn foo() {
|
|
super::S.bar();
|
|
}
|
|
}
|
|
impl S {
|
|
|
|
|
|
fn bar(&self) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_method_with_cursor_anywhere_on_call_expresion() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct S;
|
|
fn foo() {$0S.bar();}
|
|
",
|
|
r"
|
|
struct S;
|
|
fn foo() {S.bar();}
|
|
impl S {
|
|
|
|
|
|
fn bar(&self) ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn create_static_method() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
struct S;
|
|
fn foo() {S::bar$0();}
|
|
",
|
|
r"
|
|
struct S;
|
|
fn foo() {S::bar();}
|
|
impl S {
|
|
|
|
|
|
fn bar() ${0:-> _} {
|
|
todo!()
|
|
}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[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;
|
|
fn foo() {S::bar();}
|
|
impl S {
|
|
|
|
|
|
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(arg0: ()) ${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!()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
}
|