586 lines
19 KiB
Rust
586 lines
19 KiB
Rust
mod coercion;
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mod diagnostics;
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mod display_source_code;
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mod incremental;
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mod macros;
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mod method_resolution;
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mod never_type;
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mod patterns;
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mod regression;
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mod simple;
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mod traits;
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use std::env;
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use base_db::{FileRange, SourceDatabaseExt};
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use expect_test::Expect;
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use hir_def::{
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body::{Body, BodySourceMap, SyntheticSyntax},
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db::DefDatabase,
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hir::{ExprId, Pat, PatId},
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item_scope::ItemScope,
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nameres::DefMap,
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src::HasSource,
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AssocItemId, DefWithBodyId, HasModule, LocalModuleId, Lookup, ModuleDefId,
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};
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use hir_expand::{db::ExpandDatabase, InFile};
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use once_cell::race::OnceBool;
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use rustc_hash::FxHashMap;
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use stdx::format_to;
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use syntax::{
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ast::{self, AstNode, HasName},
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SyntaxNode,
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};
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use test_fixture::WithFixture;
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use tracing_subscriber::{layer::SubscriberExt, Registry};
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use tracing_tree::HierarchicalLayer;
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use triomphe::Arc;
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use crate::{
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db::HirDatabase,
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display::HirDisplay,
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infer::{Adjustment, TypeMismatch},
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test_db::TestDB,
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InferenceResult, Ty,
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};
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// These tests compare the inference results for all expressions in a file
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// against snapshots of the expected results using expect. Use
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// `env UPDATE_EXPECT=1 cargo test -p hir_ty` to update the snapshots.
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fn setup_tracing() -> Option<tracing::subscriber::DefaultGuard> {
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static ENABLE: OnceBool = OnceBool::new();
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if !ENABLE.get_or_init(|| env::var("CHALK_DEBUG").is_ok()) {
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return None;
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}
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let filter: tracing_subscriber::filter::Targets =
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env::var("CHALK_DEBUG").ok().and_then(|it| it.parse().ok()).unwrap_or_default();
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let layer = HierarchicalLayer::default()
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.with_indent_lines(true)
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.with_ansi(false)
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.with_indent_amount(2)
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.with_writer(std::io::stderr);
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let subscriber = Registry::default().with(filter).with(layer);
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Some(tracing::subscriber::set_default(subscriber))
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}
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#[track_caller]
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fn check_types(ra_fixture: &str) {
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check_impl(ra_fixture, false, true, false)
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}
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#[track_caller]
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fn check_types_source_code(ra_fixture: &str) {
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check_impl(ra_fixture, false, true, true)
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}
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#[track_caller]
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fn check_no_mismatches(ra_fixture: &str) {
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check_impl(ra_fixture, true, false, false)
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}
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#[track_caller]
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fn check(ra_fixture: &str) {
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check_impl(ra_fixture, false, false, false)
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}
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#[track_caller]
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fn check_impl(ra_fixture: &str, allow_none: bool, only_types: bool, display_source: bool) {
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let _tracing = setup_tracing();
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let (db, files) = TestDB::with_many_files(ra_fixture);
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let mut had_annotations = false;
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let mut mismatches = FxHashMap::default();
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let mut types = FxHashMap::default();
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let mut adjustments = FxHashMap::<_, Vec<_>>::default();
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for (file_id, annotations) in db.extract_annotations() {
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for (range, expected) in annotations {
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let file_range = FileRange { file_id, range };
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if only_types {
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types.insert(file_range, expected);
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} else if expected.starts_with("type: ") {
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types.insert(file_range, expected.trim_start_matches("type: ").to_owned());
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} else if expected.starts_with("expected") {
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mismatches.insert(file_range, expected);
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} else if expected.starts_with("adjustments:") {
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adjustments.insert(
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file_range,
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expected
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.trim_start_matches("adjustments:")
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.trim()
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.split(',')
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.map(|it| it.trim().to_owned())
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.filter(|it| !it.is_empty())
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.collect(),
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);
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} else {
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panic!("unexpected annotation: {expected}");
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}
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had_annotations = true;
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}
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}
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assert!(had_annotations || allow_none, "no `//^` annotations found");
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let mut defs: Vec<DefWithBodyId> = Vec::new();
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for file_id in files {
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let module = db.module_for_file_opt(file_id);
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let module = match module {
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Some(m) => m,
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None => continue,
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};
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let def_map = module.def_map(&db);
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visit_module(&db, &def_map, module.local_id, &mut |it| defs.push(it));
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}
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defs.sort_by_key(|def| match def {
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DefWithBodyId::FunctionId(it) => {
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let loc = it.lookup(&db);
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loc.source(&db).value.syntax().text_range().start()
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}
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DefWithBodyId::ConstId(it) => {
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let loc = it.lookup(&db);
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loc.source(&db).value.syntax().text_range().start()
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}
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DefWithBodyId::StaticId(it) => {
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let loc = it.lookup(&db);
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loc.source(&db).value.syntax().text_range().start()
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}
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DefWithBodyId::VariantId(it) => {
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let loc = it.lookup(&db);
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loc.source(&db).value.syntax().text_range().start()
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}
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DefWithBodyId::InTypeConstId(it) => it.source(&db).syntax().text_range().start(),
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});
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let mut unexpected_type_mismatches = String::new();
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for def in defs {
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let (body, body_source_map) = db.body_with_source_map(def);
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let inference_result = db.infer(def);
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for (pat, mut ty) in inference_result.type_of_pat.iter() {
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if let Pat::Bind { id, .. } = body.pats[pat] {
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ty = &inference_result.type_of_binding[id];
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}
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let node = match pat_node(&body_source_map, pat, &db) {
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Some(value) => value,
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None => continue,
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};
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let range = node.as_ref().original_file_range(&db);
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if let Some(expected) = types.remove(&range) {
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let actual = if display_source {
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ty.display_source_code(&db, def.module(&db), true).unwrap()
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} else {
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ty.display_test(&db).to_string()
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};
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assert_eq!(actual, expected, "type annotation differs at {:#?}", range.range);
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}
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}
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for (expr, ty) in inference_result.type_of_expr.iter() {
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let node = match expr_node(&body_source_map, expr, &db) {
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Some(value) => value,
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None => continue,
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};
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let range = node.as_ref().original_file_range(&db);
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if let Some(expected) = types.remove(&range) {
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let actual = if display_source {
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ty.display_source_code(&db, def.module(&db), true).unwrap()
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} else {
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ty.display_test(&db).to_string()
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};
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assert_eq!(actual, expected, "type annotation differs at {:#?}", range.range);
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}
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if let Some(expected) = adjustments.remove(&range) {
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let adjustments = inference_result
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.expr_adjustments
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.get(&expr)
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.map_or_else(Default::default, |it| &**it);
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assert_eq!(
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expected,
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adjustments
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.iter()
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.map(|Adjustment { kind, .. }| format!("{kind:?}"))
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.collect::<Vec<_>>()
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);
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}
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}
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for (expr_or_pat, mismatch) in inference_result.type_mismatches() {
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let Some(node) = (match expr_or_pat {
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hir_def::hir::ExprOrPatId::ExprId(expr) => expr_node(&body_source_map, expr, &db),
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hir_def::hir::ExprOrPatId::PatId(pat) => pat_node(&body_source_map, pat, &db),
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}) else {
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continue;
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};
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let range = node.as_ref().original_file_range(&db);
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let actual = format!(
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"expected {}, got {}",
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mismatch.expected.display_test(&db),
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mismatch.actual.display_test(&db)
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);
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match mismatches.remove(&range) {
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Some(annotation) => assert_eq!(actual, annotation),
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None => format_to!(unexpected_type_mismatches, "{:?}: {}\n", range.range, actual),
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}
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}
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}
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let mut buf = String::new();
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if !unexpected_type_mismatches.is_empty() {
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format_to!(buf, "Unexpected type mismatches:\n{}", unexpected_type_mismatches);
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}
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if !mismatches.is_empty() {
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format_to!(buf, "Unchecked mismatch annotations:\n");
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for m in mismatches {
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format_to!(buf, "{:?}: {}\n", m.0.range, m.1);
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}
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}
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if !types.is_empty() {
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format_to!(buf, "Unchecked type annotations:\n");
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for t in types {
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format_to!(buf, "{:?}: type {}\n", t.0.range, t.1);
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}
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}
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if !adjustments.is_empty() {
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format_to!(buf, "Unchecked adjustments annotations:\n");
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for t in adjustments {
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format_to!(buf, "{:?}: type {:?}\n", t.0.range, t.1);
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}
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}
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assert!(buf.is_empty(), "{}", buf);
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}
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fn expr_node(
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body_source_map: &BodySourceMap,
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expr: ExprId,
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db: &TestDB,
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) -> Option<InFile<SyntaxNode>> {
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Some(match body_source_map.expr_syntax(expr) {
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Ok(sp) => {
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let root = db.parse_or_expand(sp.file_id);
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sp.map(|ptr| ptr.to_node(&root).syntax().clone())
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}
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Err(SyntheticSyntax) => return None,
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})
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}
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fn pat_node(
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body_source_map: &BodySourceMap,
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pat: PatId,
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db: &TestDB,
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) -> Option<InFile<SyntaxNode>> {
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Some(match body_source_map.pat_syntax(pat) {
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Ok(sp) => {
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let root = db.parse_or_expand(sp.file_id);
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sp.map(|ptr| ptr.to_node(&root).syntax().clone())
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}
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Err(SyntheticSyntax) => return None,
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})
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}
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fn infer(ra_fixture: &str) -> String {
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infer_with_mismatches(ra_fixture, false)
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}
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fn infer_with_mismatches(content: &str, include_mismatches: bool) -> String {
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let _tracing = setup_tracing();
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let (db, file_id) = TestDB::with_single_file(content);
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let mut buf = String::new();
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let mut infer_def = |inference_result: Arc<InferenceResult>,
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body: Arc<Body>,
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body_source_map: Arc<BodySourceMap>| {
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let mut types: Vec<(InFile<SyntaxNode>, &Ty)> = Vec::new();
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let mut mismatches: Vec<(InFile<SyntaxNode>, &TypeMismatch)> = Vec::new();
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for (pat, mut ty) in inference_result.type_of_pat.iter() {
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if let Pat::Bind { id, .. } = body.pats[pat] {
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ty = &inference_result.type_of_binding[id];
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}
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let syntax_ptr = match body_source_map.pat_syntax(pat) {
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Ok(sp) => {
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let root = db.parse_or_expand(sp.file_id);
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sp.map(|ptr| ptr.to_node(&root).syntax().clone())
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}
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Err(SyntheticSyntax) => continue,
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};
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types.push((syntax_ptr.clone(), ty));
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if let Some(mismatch) = inference_result.type_mismatch_for_pat(pat) {
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mismatches.push((syntax_ptr, mismatch));
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}
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}
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for (expr, ty) in inference_result.type_of_expr.iter() {
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let node = match body_source_map.expr_syntax(expr) {
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Ok(sp) => {
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let root = db.parse_or_expand(sp.file_id);
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sp.map(|ptr| ptr.to_node(&root).syntax().clone())
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}
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Err(SyntheticSyntax) => continue,
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};
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types.push((node.clone(), ty));
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if let Some(mismatch) = inference_result.type_mismatch_for_expr(expr) {
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mismatches.push((node, mismatch));
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}
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}
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// sort ranges for consistency
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types.sort_by_key(|(node, _)| {
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let range = node.value.text_range();
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(range.start(), range.end())
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});
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for (node, ty) in &types {
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let (range, text) = if let Some(self_param) = ast::SelfParam::cast(node.value.clone()) {
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(self_param.name().unwrap().syntax().text_range(), "self".to_owned())
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} else {
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(node.value.text_range(), node.value.text().to_string().replace('\n', " "))
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};
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let macro_prefix = if node.file_id != file_id.into() { "!" } else { "" };
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format_to!(
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buf,
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"{}{:?} '{}': {}\n",
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macro_prefix,
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range,
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ellipsize(text, 15),
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ty.display_test(&db)
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);
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}
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if include_mismatches {
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mismatches.sort_by_key(|(node, _)| {
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let range = node.value.text_range();
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(range.start(), range.end())
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});
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for (src_ptr, mismatch) in &mismatches {
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let range = src_ptr.value.text_range();
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let macro_prefix = if src_ptr.file_id != file_id.into() { "!" } else { "" };
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format_to!(
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buf,
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"{}{:?}: expected {}, got {}\n",
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macro_prefix,
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range,
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mismatch.expected.display_test(&db),
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mismatch.actual.display_test(&db),
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);
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}
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}
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};
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let module = db.module_for_file(file_id);
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let def_map = module.def_map(&db);
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let mut defs: Vec<DefWithBodyId> = Vec::new();
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visit_module(&db, &def_map, module.local_id, &mut |it| defs.push(it));
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defs.sort_by_key(|def| match def {
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DefWithBodyId::FunctionId(it) => {
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let loc = it.lookup(&db);
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loc.source(&db).value.syntax().text_range().start()
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}
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DefWithBodyId::ConstId(it) => {
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let loc = it.lookup(&db);
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loc.source(&db).value.syntax().text_range().start()
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}
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DefWithBodyId::StaticId(it) => {
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let loc = it.lookup(&db);
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loc.source(&db).value.syntax().text_range().start()
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}
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DefWithBodyId::VariantId(it) => {
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let loc = it.lookup(&db);
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loc.source(&db).value.syntax().text_range().start()
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}
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DefWithBodyId::InTypeConstId(it) => it.source(&db).syntax().text_range().start(),
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});
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for def in defs {
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let (body, source_map) = db.body_with_source_map(def);
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let infer = db.infer(def);
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infer_def(infer, body, source_map);
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}
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buf.truncate(buf.trim_end().len());
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buf
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}
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fn visit_module(
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db: &TestDB,
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crate_def_map: &DefMap,
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module_id: LocalModuleId,
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cb: &mut dyn FnMut(DefWithBodyId),
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) {
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visit_scope(db, crate_def_map, &crate_def_map[module_id].scope, cb);
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for impl_id in crate_def_map[module_id].scope.impls() {
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let impl_data = db.impl_data(impl_id);
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for &item in impl_data.items.iter() {
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match item {
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AssocItemId::FunctionId(it) => {
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let def = it.into();
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cb(def);
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let body = db.body(def);
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visit_body(db, &body, cb);
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}
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AssocItemId::ConstId(it) => {
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let def = it.into();
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cb(def);
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let body = db.body(def);
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visit_body(db, &body, cb);
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}
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AssocItemId::TypeAliasId(_) => (),
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}
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}
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}
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fn visit_scope(
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db: &TestDB,
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crate_def_map: &DefMap,
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scope: &ItemScope,
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cb: &mut dyn FnMut(DefWithBodyId),
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) {
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for decl in scope.declarations() {
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match decl {
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ModuleDefId::FunctionId(it) => {
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let def = it.into();
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cb(def);
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let body = db.body(def);
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visit_body(db, &body, cb);
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}
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ModuleDefId::ConstId(it) => {
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let def = it.into();
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cb(def);
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let body = db.body(def);
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visit_body(db, &body, cb);
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}
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ModuleDefId::StaticId(it) => {
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let def = it.into();
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cb(def);
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let body = db.body(def);
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visit_body(db, &body, cb);
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}
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ModuleDefId::AdtId(hir_def::AdtId::EnumId(it)) => {
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db.enum_data(it).variants.iter().for_each(|&(it, _)| {
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let def = it.into();
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cb(def);
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let body = db.body(def);
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visit_body(db, &body, cb);
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});
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}
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ModuleDefId::TraitId(it) => {
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let trait_data = db.trait_data(it);
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for &(_, item) in trait_data.items.iter() {
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match item {
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AssocItemId::FunctionId(it) => cb(it.into()),
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AssocItemId::ConstId(it) => cb(it.into()),
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AssocItemId::TypeAliasId(_) => (),
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}
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}
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}
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ModuleDefId::ModuleId(it) => visit_module(db, crate_def_map, it.local_id, cb),
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_ => (),
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}
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}
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}
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|
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fn visit_body(db: &TestDB, body: &Body, cb: &mut dyn FnMut(DefWithBodyId)) {
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for (_, def_map) in body.blocks(db) {
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for (mod_id, _) in def_map.modules() {
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visit_module(db, &def_map, mod_id, cb);
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}
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}
|
|
}
|
|
}
|
|
|
|
fn ellipsize(mut text: String, max_len: usize) -> String {
|
|
if text.len() <= max_len {
|
|
return text;
|
|
}
|
|
let ellipsis = "...";
|
|
let e_len = ellipsis.len();
|
|
let mut prefix_len = (max_len - e_len) / 2;
|
|
while !text.is_char_boundary(prefix_len) {
|
|
prefix_len += 1;
|
|
}
|
|
let mut suffix_len = max_len - e_len - prefix_len;
|
|
while !text.is_char_boundary(text.len() - suffix_len) {
|
|
suffix_len += 1;
|
|
}
|
|
text.replace_range(prefix_len..text.len() - suffix_len, ellipsis);
|
|
text
|
|
}
|
|
|
|
fn check_infer(ra_fixture: &str, expect: Expect) {
|
|
let mut actual = infer(ra_fixture);
|
|
actual.push('\n');
|
|
expect.assert_eq(&actual);
|
|
}
|
|
|
|
fn check_infer_with_mismatches(ra_fixture: &str, expect: Expect) {
|
|
let mut actual = infer_with_mismatches(ra_fixture, true);
|
|
actual.push('\n');
|
|
expect.assert_eq(&actual);
|
|
}
|
|
|
|
#[test]
|
|
fn salsa_bug() {
|
|
let (mut db, pos) = TestDB::with_position(
|
|
"
|
|
//- /lib.rs
|
|
trait Index {
|
|
type Output;
|
|
}
|
|
|
|
type Key<S: UnificationStoreBase> = <S as UnificationStoreBase>::Key;
|
|
|
|
pub trait UnificationStoreBase: Index<Output = Key<Self>> {
|
|
type Key;
|
|
|
|
fn len(&self) -> usize;
|
|
}
|
|
|
|
pub trait UnificationStoreMut: UnificationStoreBase {
|
|
fn push(&mut self, value: Self::Key);
|
|
}
|
|
|
|
fn main() {
|
|
let x = 1;
|
|
x.push(1);$0
|
|
}
|
|
",
|
|
);
|
|
|
|
let module = db.module_for_file(pos.file_id);
|
|
let crate_def_map = module.def_map(&db);
|
|
visit_module(&db, &crate_def_map, module.local_id, &mut |def| {
|
|
db.infer(def);
|
|
});
|
|
|
|
let new_text = "
|
|
//- /lib.rs
|
|
trait Index {
|
|
type Output;
|
|
}
|
|
|
|
type Key<S: UnificationStoreBase> = <S as UnificationStoreBase>::Key;
|
|
|
|
pub trait UnificationStoreBase: Index<Output = Key<Self>> {
|
|
type Key;
|
|
|
|
fn len(&self) -> usize;
|
|
}
|
|
|
|
pub trait UnificationStoreMut: UnificationStoreBase {
|
|
fn push(&mut self, value: Self::Key);
|
|
}
|
|
|
|
fn main() {
|
|
|
|
let x = 1;
|
|
x.push(1);
|
|
}
|
|
";
|
|
|
|
db.set_file_text(pos.file_id, Arc::from(new_text));
|
|
|
|
let module = db.module_for_file(pos.file_id);
|
|
let crate_def_map = module.def_map(&db);
|
|
visit_module(&db, &crate_def_map, module.local_id, &mut |def| {
|
|
db.infer(def);
|
|
});
|
|
}
|