1181 lines
24 KiB
Rust
1181 lines
24 KiB
Rust
use hir::HirDisplay;
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use ide_db::{base_db::FileId, helpers::SnippetCap};
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use rustc_hash::{FxHashMap, FxHashSet};
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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, ArgListOwner, AstNode, ModuleItemOwner,
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},
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SyntaxKind, SyntaxNode, TextSize,
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};
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use crate::{
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utils::{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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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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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 target_module = 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))) => Some(module),
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_ => return None,
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},
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None => None,
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};
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let function_builder = FunctionBuilder::from_call(&ctx, &call, &path, target_module)?;
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let target = call.syntax().text_range();
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acc.add(
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AssistId("generate_function", AssistKind::Generate),
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format!("Generate `{}` function", function_builder.fn_name),
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target,
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|builder| {
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let function_template = function_builder.render();
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builder.edit_file(function_template.file);
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let new_fn = function_template.to_string(ctx.config.snippet_cap);
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match ctx.config.snippet_cap {
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Some(cap) => builder.insert_snippet(cap, function_template.insert_offset, new_fn),
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None => builder.insert(function_template.insert_offset, new_fn),
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}
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},
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)
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}
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struct FunctionTemplate {
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insert_offset: TextSize,
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leading_ws: String,
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fn_def: ast::Fn,
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ret_type: ast::RetType,
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should_render_snippet: bool,
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trailing_ws: String,
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file: FileId,
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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, self.should_render_snippet) {
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(Some(cap), true) => {
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render_snippet(cap, self.fn_def.syntax(), Cursor::Replace(self.ret_type.syntax()))
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}
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_ => 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: ast::RetType,
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should_render_snippet: bool,
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file: FileId,
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needs_pub: 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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path: &ast::Path,
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target_module: Option<hir::Module>,
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) -> Option<Self> {
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let mut file = ctx.frange.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(&call)?,
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};
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let needs_pub = target_module.is_some();
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let target_module = target_module.or_else(|| ctx.sema.scope(target.syntax()).module())?;
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let fn_name = fn_name(&path)?;
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let (type_params, params) = fn_args(ctx, target_module, &call)?;
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// should_render_snippet intends to express a rough level of confidence about
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// the correctness of the return type.
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//
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// If we are able to infer some return type, and that return type is not unit, we
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// don't want to render the snippet. The assumption here is in this situation the
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// return type is just as likely to be correct as any other part of the generated
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// function.
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//
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// In the case where the return type is inferred as unit it is likely that the
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// user does in fact intend for this generated function to return some non unit
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// type, but that the current state of their code doesn't allow that return type
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// to be accurately inferred.
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let (ret_ty, should_render_snippet) = {
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match ctx.sema.type_of_expr(&ast::Expr::CallExpr(call.clone())) {
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Some(ty) if ty.is_unknown() || ty.is_unit() => (make::ty_unit(), true),
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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) => (make::ty(&rendered), false),
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Err(_) => (make::ty_unit(), true),
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}
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}
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None => (make::ty_unit(), true),
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}
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};
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let ret_type = make::ret_type(ret_ty);
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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_render_snippet,
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file,
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needs_pub,
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})
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}
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fn render(self) -> FunctionTemplate {
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let placeholder_expr = make::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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Some(self.ret_type),
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);
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let leading_ws;
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let trailing_ws;
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let insert_offset = 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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it.text_range().end()
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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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it.text_range().start() + TextSize::of('{')
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}
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};
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FunctionTemplate {
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insert_offset,
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leading_ws,
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ret_type: fn_def.ret_type().unwrap(),
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should_render_snippet: self.should_render_snippet,
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fn_def,
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trailing_ws,
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file: self.file,
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}
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}
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}
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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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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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fn fn_name(call: &ast::Path) -> Option<ast::Name> {
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let name = call.segment()?.syntax().to_string();
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Some(make::name(&name))
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}
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/// Computes the type variables and arguments required for the generated function
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fn fn_args(
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ctx: &AssistContext,
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target_module: hir::Module,
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call: &ast::CallExpr,
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) -> 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();
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for arg in call.arg_list()?.args() {
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arg_names.push(match fn_arg_name(&arg) {
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Some(name) => name,
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None => String::from("arg"),
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});
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arg_types.push(match fn_arg_type(ctx, target_module, &arg) {
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Some(ty) => ty,
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None => String::from("()"),
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});
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}
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deduplicate_arg_names(&mut arg_names);
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let params = arg_names
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.into_iter()
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.zip(arg_types)
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.map(|(name, ty)| make::param(make::ident_pat(make::name(&name)).into(), make::ty(&ty)));
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Some((None, make::param_list(None, params)))
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}
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/// Makes duplicate argument names unique by appending incrementing numbers.
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///
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/// ```
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/// let mut names: Vec<String> =
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/// vec!["foo".into(), "foo".into(), "bar".into(), "baz".into(), "bar".into()];
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/// deduplicate_arg_names(&mut names);
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/// let expected: Vec<String> =
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/// vec!["foo_1".into(), "foo_2".into(), "bar_1".into(), "baz".into(), "bar_2".into()];
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/// assert_eq!(names, expected);
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/// ```
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fn deduplicate_arg_names(arg_names: &mut Vec<String>) {
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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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});
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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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let mut counter_per_name = FxHashMap::default();
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for arg_name in arg_names.iter_mut() {
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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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}
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fn fn_arg_name(fn_arg: &ast::Expr) -> Option<String> {
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match fn_arg {
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ast::Expr::CastExpr(cast_expr) => fn_arg_name(&cast_expr.expr()?),
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_ => {
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let s = fn_arg
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.syntax()
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.descendants()
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.filter(|d| ast::NameRef::can_cast(d.kind()))
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.last()?
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.to_string();
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Some(to_lower_snake_case(&s))
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}
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}
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}
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fn fn_arg_type(
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ctx: &AssistContext,
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target_module: hir::Module,
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fn_arg: &ast::Expr,
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) -> Option<String> {
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let ty = ctx.sema.type_of_expr(fn_arg)?;
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if ty.is_unknown() {
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return None;
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}
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if let Ok(rendered) = ty.display_source_code(ctx.db(), target_module.into()) {
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Some(rendered)
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} else {
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None
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}
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}
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/// Returns the position inside the current mod or file
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/// directly after the current block
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/// We want to write the generated function directly after
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/// fns, impls or macro calls, but inside mods
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fn next_space_for_fn_after_call_site(expr: &ast::CallExpr) -> Option<GeneratedFunctionTarget> {
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let mut ancestors = expr.syntax().ancestors().peekable();
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let mut last_ancestor: Option<SyntaxNode> = None;
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while let Some(next_ancestor) = ancestors.next() {
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match next_ancestor.kind() {
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SyntaxKind::SOURCE_FILE => {
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break;
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}
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SyntaxKind::ITEM_LIST => {
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if ancestors.peek().map(|a| a.kind()) == Some(SyntaxKind::MODULE) {
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break;
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}
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}
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_ => {}
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}
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last_ancestor = Some(next_ancestor);
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}
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last_ancestor.map(GeneratedFunctionTarget::BehindItem)
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}
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fn next_space_for_fn_in_module(
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db: &dyn hir::db::AstDatabase,
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module_source: &hir::InFile<hir::ModuleSource>,
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) -> Option<(FileId, GeneratedFunctionTarget)> {
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let file = module_source.file_id.original_file(db);
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let assist_item = match &module_source.value {
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hir::ModuleSource::SourceFile(it) => {
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if let Some(last_item) = it.items().last() {
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GeneratedFunctionTarget::BehindItem(last_item.syntax().clone())
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} else {
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GeneratedFunctionTarget::BehindItem(it.syntax().clone())
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}
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}
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hir::ModuleSource::Module(it) => {
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if let Some(last_item) = it.item_list().and_then(|it| it.items().last()) {
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GeneratedFunctionTarget::BehindItem(last_item.syntax().clone())
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} else {
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GeneratedFunctionTarget::InEmptyItemList(it.item_list()?.syntax().clone())
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}
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}
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hir::ModuleSource::BlockExpr(it) => {
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if let Some(last_item) =
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it.statements().take_while(|stmt| matches!(stmt, ast::Stmt::Item(_))).last()
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{
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GeneratedFunctionTarget::BehindItem(last_item.syntax().clone())
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} else {
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GeneratedFunctionTarget::InEmptyItemList(it.syntax().clone())
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}
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}
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};
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Some((file, assist_item))
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}
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#[cfg(test)]
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mod tests {
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use crate::tests::{check_assist, check_assist_not_applicable};
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use super::*;
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#[test]
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fn add_function_with_no_args() {
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check_assist(
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generate_function,
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r"
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fn foo() {
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bar$0();
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}
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",
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r"
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fn foo() {
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bar();
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}
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fn bar() ${0:-> ()} {
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todo!()
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}
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",
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)
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}
|
|
|
|
#[test]
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fn add_function_from_method() {
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// This ensures that the function is correctly generated
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// in the next outer mod or file
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check_assist(
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generate_function,
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|
r"
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impl Foo {
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fn foo() {
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bar$0();
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}
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}
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",
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|
r"
|
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impl Foo {
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fn foo() {
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bar();
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}
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|
}
|
|
|
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fn bar() ${0:-> ()} {
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todo!()
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}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
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|
fn add_function_directly_after_current_block() {
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// The new fn should not be created at the end of the file or module
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check_assist(
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generate_function,
|
|
r"
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fn foo1() {
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bar$0();
|
|
}
|
|
|
|
fn foo2() {}
|
|
",
|
|
r"
|
|
fn foo1() {
|
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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 {
|
|
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"
|
|
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]
|
|
#[ignore]
|
|
// FIXME fix printing the generics of a `Ty` to make this test pass
|
|
fn add_function_with_generic_arg() {
|
|
check_assist(
|
|
generate_function,
|
|
r"
|
|
fn foo<T>(t: T) {
|
|
$0bar(t)
|
|
}
|
|
",
|
|
r"
|
|
fn foo<T>(t: T) {
|
|
bar(t)
|
|
}
|
|
|
|
fn bar<T>(t: T) ${0:-> ()} {
|
|
todo!()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
#[ignore]
|
|
// FIXME Fix function type printing to make this test pass
|
|
fn add_function_with_fn_arg() {
|
|
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(arg: fn() -> Baz) ${0:-> ()} {
|
|
todo!()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
#[ignore]
|
|
// FIXME Fix closure type printing to make this test pass
|
|
fn add_function_with_closure_arg() {
|
|
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: impl Fn(i64) -> i64) ${0:-> ()} {
|
|
todo!()
|
|
}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn unresolveable_types_default_to_unit() {
|
|
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]
|
|
#[ignore]
|
|
// Ignored until local imports are supported.
|
|
// See https://github.com/rust-analyzer/rust-analyzer/issues/1165
|
|
fn qualified_path_uses_correct_scope() {
|
|
check_assist(
|
|
generate_function,
|
|
"
|
|
mod foo {
|
|
pub struct Foo;
|
|
}
|
|
fn bar() {
|
|
use foo::Foo;
|
|
let foo = Foo;
|
|
baz$0(foo)
|
|
}
|
|
",
|
|
"
|
|
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 {
|
|
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]
|
|
#[ignore]
|
|
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) {
|
|
todo!();
|
|
}
|
|
}
|
|
",
|
|
)
|
|
}
|
|
}
|