mirror of
https://github.com/rust-lang/rust-analyzer
synced 2025-01-09 11:48:48 +00:00
1757 lines
34 KiB
Rust
1757 lines
34 KiB
Rust
use super::{infer, type_at, type_at_pos};
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use crate::test_db::TestDB;
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use insta::assert_snapshot;
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use ra_db::fixture::WithFixture;
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#[test]
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fn infer_box() {
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let (db, pos) = TestDB::with_position(
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r#"
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//- /main.rs crate:main deps:std
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fn test() {
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let x = box 1;
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let t = (x, box x, box &1, box [1]);
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t<|>;
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}
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//- /std.rs crate:std
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#[prelude_import] use prelude::*;
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mod prelude {}
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mod boxed {
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#[lang = "owned_box"]
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pub struct Box<T: ?Sized> {
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inner: *mut T,
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}
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}
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"#,
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);
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assert_eq!("(Box<i32>, Box<Box<i32>>, Box<&i32>, Box<[i32; _]>)", type_at_pos(&db, pos));
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}
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#[test]
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fn infer_adt_self() {
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let (db, pos) = TestDB::with_position(
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r#"
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//- /main.rs
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enum Nat { Succ(Self), Demo(Nat), Zero }
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fn test() {
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let foo: Nat = Nat::Zero;
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if let Nat::Succ(x) = foo {
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x<|>
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}
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}
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"#,
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);
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assert_eq!("Nat", type_at_pos(&db, pos));
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}
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#[test]
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fn self_in_struct_lit() {
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assert_snapshot!(infer(
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r#"
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//- /main.rs
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struct S<T> { x: T }
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impl S<u32> {
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fn foo() {
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Self { x: 1 };
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}
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}
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"#,
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), @r###"
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[63; 93) '{ ... }': ()
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[73; 86) 'Self { x: 1 }': S<u32>
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[83; 84) '1': u32
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"###);
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}
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#[test]
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fn type_alias_in_struct_lit() {
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assert_snapshot!(infer(
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r#"
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//- /main.rs
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struct S<T> { x: T }
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type SS = S<u32>;
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fn foo() {
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SS { x: 1 };
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}
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"#,
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), @r###"
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[64; 84) '{ ...1 }; }': ()
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[70; 81) 'SS { x: 1 }': S<u32>
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[78; 79) '1': u32
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"###);
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}
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#[test]
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fn infer_ranges() {
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let (db, pos) = TestDB::with_position(
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r#"
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//- /main.rs crate:main deps:std
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fn test() {
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let a = ..;
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let b = 1..;
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let c = ..2u32;
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let d = 1..2usize;
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let e = ..=10;
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let f = 'a'..='z';
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let t = (a, b, c, d, e, f);
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t<|>;
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}
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//- /std.rs crate:std
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#[prelude_import] use prelude::*;
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mod prelude {}
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pub mod ops {
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pub struct Range<Idx> {
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pub start: Idx,
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pub end: Idx,
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}
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pub struct RangeFrom<Idx> {
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pub start: Idx,
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}
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struct RangeFull;
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pub struct RangeInclusive<Idx> {
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start: Idx,
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end: Idx,
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is_empty: u8,
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}
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pub struct RangeTo<Idx> {
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pub end: Idx,
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}
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pub struct RangeToInclusive<Idx> {
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pub end: Idx,
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}
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}
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"#,
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);
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assert_eq!(
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"(RangeFull, RangeFrom<i32>, RangeTo<u32>, Range<usize>, RangeToInclusive<i32>, RangeInclusive<char>)",
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type_at_pos(&db, pos),
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);
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}
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#[test]
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fn infer_while_let() {
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let (db, pos) = TestDB::with_position(
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r#"
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//- /main.rs
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enum Option<T> { Some(T), None }
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fn test() {
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let foo: Option<f32> = None;
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while let Option::Some(x) = foo {
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<|>x
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}
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}
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"#,
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);
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assert_eq!("f32", type_at_pos(&db, pos));
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}
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#[test]
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fn infer_basics() {
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assert_snapshot!(
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infer(r#"
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fn test(a: u32, b: isize, c: !, d: &str) {
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a;
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b;
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c;
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d;
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1usize;
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1isize;
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"test";
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1.0f32;
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}"#),
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@r###"
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[9; 10) 'a': u32
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[17; 18) 'b': isize
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[27; 28) 'c': !
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[33; 34) 'd': &str
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[42; 121) '{ ...f32; }': !
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[48; 49) 'a': u32
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[55; 56) 'b': isize
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[62; 63) 'c': !
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[69; 70) 'd': &str
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[76; 82) '1usize': usize
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[88; 94) '1isize': isize
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[100; 106) '"test"': &str
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[112; 118) '1.0f32': f32
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"###
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);
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}
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#[test]
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fn infer_let() {
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assert_snapshot!(
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infer(r#"
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fn test() {
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let a = 1isize;
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let b: usize = 1;
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let c = b;
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let d: u32;
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let e;
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let f: i32 = e;
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}
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"#),
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@r###"
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[11; 118) '{ ...= e; }': ()
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[21; 22) 'a': isize
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[25; 31) '1isize': isize
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[41; 42) 'b': usize
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[52; 53) '1': usize
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[63; 64) 'c': usize
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[67; 68) 'b': usize
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[78; 79) 'd': u32
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[94; 95) 'e': i32
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[105; 106) 'f': i32
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[114; 115) 'e': i32
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"###
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);
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}
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#[test]
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fn infer_paths() {
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assert_snapshot!(
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infer(r#"
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fn a() -> u32 { 1 }
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mod b {
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fn c() -> u32 { 1 }
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}
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fn test() {
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a();
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b::c();
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}
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"#),
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@r###"
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[15; 20) '{ 1 }': u32
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[17; 18) '1': u32
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[48; 53) '{ 1 }': u32
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[50; 51) '1': u32
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[67; 91) '{ ...c(); }': ()
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[73; 74) 'a': fn a() -> u32
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[73; 76) 'a()': u32
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[82; 86) 'b::c': fn c() -> u32
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[82; 88) 'b::c()': u32
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"###
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);
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}
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#[test]
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fn infer_path_type() {
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assert_snapshot!(
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infer(r#"
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struct S;
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impl S {
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fn foo() -> i32 { 1 }
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}
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fn test() {
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S::foo();
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<S>::foo();
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}
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"#),
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@r###"
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[41; 46) '{ 1 }': i32
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[43; 44) '1': i32
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[60; 93) '{ ...o(); }': ()
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[66; 72) 'S::foo': fn foo() -> i32
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[66; 74) 'S::foo()': i32
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[80; 88) '<S>::foo': fn foo() -> i32
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[80; 90) '<S>::foo()': i32
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"###
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);
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}
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#[test]
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fn infer_struct() {
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assert_snapshot!(
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infer(r#"
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struct A {
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b: B,
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c: C,
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}
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struct B;
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struct C(usize);
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fn test() {
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let c = C(1);
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B;
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let a: A = A { b: B, c: C(1) };
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a.b;
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a.c;
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}
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"#),
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@r###"
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[72; 154) '{ ...a.c; }': ()
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[82; 83) 'c': C
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[86; 87) 'C': C(usize) -> C
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[86; 90) 'C(1)': C
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[88; 89) '1': usize
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[96; 97) 'B': B
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[107; 108) 'a': A
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[114; 133) 'A { b:...C(1) }': A
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[121; 122) 'B': B
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[127; 128) 'C': C(usize) -> C
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[127; 131) 'C(1)': C
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[129; 130) '1': usize
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[139; 140) 'a': A
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[139; 142) 'a.b': B
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[148; 149) 'a': A
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[148; 151) 'a.c': C
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"###
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);
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}
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#[test]
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fn infer_enum() {
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assert_snapshot!(
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infer(r#"
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enum E {
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V1 { field: u32 },
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V2
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}
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fn test() {
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E::V1 { field: 1 };
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E::V2;
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}"#),
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@r###"
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[48; 82) '{ E:...:V2; }': ()
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[52; 70) 'E::V1 ...d: 1 }': E
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[67; 68) '1': u32
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[74; 79) 'E::V2': E
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"###
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);
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}
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#[test]
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fn infer_refs() {
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assert_snapshot!(
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infer(r#"
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fn test(a: &u32, b: &mut u32, c: *const u32, d: *mut u32) {
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a;
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*a;
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&a;
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&mut a;
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b;
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*b;
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&b;
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c;
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*c;
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d;
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*d;
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}
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"#),
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@r###"
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[9; 10) 'a': &u32
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[18; 19) 'b': &mut u32
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[31; 32) 'c': *const u32
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[46; 47) 'd': *mut u32
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[59; 150) '{ ... *d; }': ()
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[65; 66) 'a': &u32
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[72; 74) '*a': u32
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[73; 74) 'a': &u32
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[80; 82) '&a': &&u32
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[81; 82) 'a': &u32
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[88; 94) '&mut a': &mut &u32
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[93; 94) 'a': &u32
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[100; 101) 'b': &mut u32
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[107; 109) '*b': u32
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[108; 109) 'b': &mut u32
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[115; 117) '&b': &&mut u32
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[116; 117) 'b': &mut u32
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[123; 124) 'c': *const u32
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[130; 132) '*c': u32
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[131; 132) 'c': *const u32
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[138; 139) 'd': *mut u32
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[145; 147) '*d': u32
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[146; 147) 'd': *mut u32
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"###
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);
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}
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#[test]
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fn infer_literals() {
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assert_snapshot!(
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infer(r##"
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fn test() {
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5i32;
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5f32;
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5f64;
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"hello";
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b"bytes";
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'c';
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b'b';
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3.14;
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5000;
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false;
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true;
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r#"
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//! doc
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// non-doc
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mod foo {}
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"#;
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br#"yolo"#;
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}
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"##),
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@r###"
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[11; 221) '{ ...o"#; }': ()
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[17; 21) '5i32': i32
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[27; 31) '5f32': f32
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[37; 41) '5f64': f64
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[47; 54) '"hello"': &str
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[60; 68) 'b"bytes"': &[u8]
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[74; 77) ''c'': char
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[83; 87) 'b'b'': u8
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[93; 97) '3.14': f64
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[103; 107) '5000': i32
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[113; 118) 'false': bool
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[124; 128) 'true': bool
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[134; 202) 'r#" ... "#': &str
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[208; 218) 'br#"yolo"#': &[u8]
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"###
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);
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}
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#[test]
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fn infer_unary_op() {
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assert_snapshot!(
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infer(r#"
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enum SomeType {}
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fn test(x: SomeType) {
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let b = false;
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let c = !b;
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let a = 100;
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let d: i128 = -a;
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let e = -100;
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let f = !!!true;
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let g = !42;
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let h = !10u32;
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let j = !a;
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-3.14;
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!3;
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-x;
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!x;
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-"hello";
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!"hello";
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}
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"#),
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@r###"
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[27; 28) 'x': SomeType
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[40; 272) '{ ...lo"; }': ()
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[50; 51) 'b': bool
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[54; 59) 'false': bool
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[69; 70) 'c': bool
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|
[73; 75) '!b': bool
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[74; 75) 'b': bool
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[85; 86) 'a': i128
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[89; 92) '100': i128
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[102; 103) 'd': i128
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|
[112; 114) '-a': i128
|
|
[113; 114) 'a': i128
|
|
[124; 125) 'e': i32
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|
[128; 132) '-100': i32
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|
[129; 132) '100': i32
|
|
[142; 143) 'f': bool
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|
[146; 153) '!!!true': bool
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|
[147; 153) '!!true': bool
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|
[148; 153) '!true': bool
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|
[149; 153) 'true': bool
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|
[163; 164) 'g': i32
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|
[167; 170) '!42': i32
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|
[168; 170) '42': i32
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|
[180; 181) 'h': u32
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|
[184; 190) '!10u32': u32
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|
[185; 190) '10u32': u32
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|
[200; 201) 'j': i128
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|
[204; 206) '!a': i128
|
|
[205; 206) 'a': i128
|
|
[212; 217) '-3.14': f64
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|
[213; 217) '3.14': f64
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|
[223; 225) '!3': i32
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|
[224; 225) '3': i32
|
|
[231; 233) '-x': {unknown}
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|
[232; 233) 'x': SomeType
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|
[239; 241) '!x': {unknown}
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|
[240; 241) 'x': SomeType
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|
[247; 255) '-"hello"': {unknown}
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|
[248; 255) '"hello"': &str
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|
[261; 269) '!"hello"': {unknown}
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|
[262; 269) '"hello"': &str
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|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_backwards() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
fn takes_u32(x: u32) {}
|
|
|
|
struct S { i32_field: i32 }
|
|
|
|
fn test() -> &mut &f64 {
|
|
let a = unknown_function();
|
|
takes_u32(a);
|
|
let b = unknown_function();
|
|
S { i32_field: b };
|
|
let c = unknown_function();
|
|
&mut &c
|
|
}
|
|
"#),
|
|
@r###"
|
|
[14; 15) 'x': u32
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|
[22; 24) '{}': ()
|
|
[78; 231) '{ ...t &c }': &mut &f64
|
|
[88; 89) 'a': u32
|
|
[92; 108) 'unknow...nction': {unknown}
|
|
[92; 110) 'unknow...tion()': u32
|
|
[116; 125) 'takes_u32': fn takes_u32(u32)
|
|
[116; 128) 'takes_u32(a)': ()
|
|
[126; 127) 'a': u32
|
|
[138; 139) 'b': i32
|
|
[142; 158) 'unknow...nction': {unknown}
|
|
[142; 160) 'unknow...tion()': i32
|
|
[166; 184) 'S { i3...d: b }': S
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|
[181; 182) 'b': i32
|
|
[194; 195) 'c': f64
|
|
[198; 214) 'unknow...nction': {unknown}
|
|
[198; 216) 'unknow...tion()': f64
|
|
[222; 229) '&mut &c': &mut &f64
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|
[227; 229) '&c': &f64
|
|
[228; 229) 'c': f64
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_self() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
struct S;
|
|
|
|
impl S {
|
|
fn test(&self) {
|
|
self;
|
|
}
|
|
fn test2(self: &Self) {
|
|
self;
|
|
}
|
|
fn test3() -> Self {
|
|
S {}
|
|
}
|
|
fn test4() -> Self {
|
|
Self {}
|
|
}
|
|
}
|
|
"#),
|
|
@r###"
|
|
[34; 38) 'self': &S
|
|
[40; 61) '{ ... }': ()
|
|
[50; 54) 'self': &S
|
|
[75; 79) 'self': &S
|
|
[88; 109) '{ ... }': ()
|
|
[98; 102) 'self': &S
|
|
[133; 153) '{ ... }': S
|
|
[143; 147) 'S {}': S
|
|
[177; 200) '{ ... }': S
|
|
[187; 194) 'Self {}': S
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_binary_op() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
fn f(x: bool) -> i32 {
|
|
0i32
|
|
}
|
|
|
|
fn test() -> bool {
|
|
let x = a && b;
|
|
let y = true || false;
|
|
let z = x == y;
|
|
let t = x != y;
|
|
let minus_forty: isize = -40isize;
|
|
let h = minus_forty <= CONST_2;
|
|
let c = f(z || y) + 5;
|
|
let d = b;
|
|
let g = minus_forty ^= i;
|
|
let ten: usize = 10;
|
|
let ten_is_eleven = ten == some_num;
|
|
|
|
ten < 3
|
|
}
|
|
"#),
|
|
@r###"
|
|
[6; 7) 'x': bool
|
|
[22; 34) '{ 0i32 }': i32
|
|
[28; 32) '0i32': i32
|
|
[54; 370) '{ ... < 3 }': bool
|
|
[64; 65) 'x': bool
|
|
[68; 69) 'a': bool
|
|
[68; 74) 'a && b': bool
|
|
[73; 74) 'b': bool
|
|
[84; 85) 'y': bool
|
|
[88; 92) 'true': bool
|
|
[88; 101) 'true || false': bool
|
|
[96; 101) 'false': bool
|
|
[111; 112) 'z': bool
|
|
[115; 116) 'x': bool
|
|
[115; 121) 'x == y': bool
|
|
[120; 121) 'y': bool
|
|
[131; 132) 't': bool
|
|
[135; 136) 'x': bool
|
|
[135; 141) 'x != y': bool
|
|
[140; 141) 'y': bool
|
|
[151; 162) 'minus_forty': isize
|
|
[172; 180) '-40isize': isize
|
|
[173; 180) '40isize': isize
|
|
[190; 191) 'h': bool
|
|
[194; 205) 'minus_forty': isize
|
|
[194; 216) 'minus_...ONST_2': bool
|
|
[209; 216) 'CONST_2': isize
|
|
[226; 227) 'c': i32
|
|
[230; 231) 'f': fn f(bool) -> i32
|
|
[230; 239) 'f(z || y)': i32
|
|
[230; 243) 'f(z || y) + 5': i32
|
|
[232; 233) 'z': bool
|
|
[232; 238) 'z || y': bool
|
|
[237; 238) 'y': bool
|
|
[242; 243) '5': i32
|
|
[253; 254) 'd': {unknown}
|
|
[257; 258) 'b': {unknown}
|
|
[268; 269) 'g': ()
|
|
[272; 283) 'minus_forty': isize
|
|
[272; 288) 'minus_...y ^= i': ()
|
|
[287; 288) 'i': isize
|
|
[298; 301) 'ten': usize
|
|
[311; 313) '10': usize
|
|
[323; 336) 'ten_is_eleven': bool
|
|
[339; 342) 'ten': usize
|
|
[339; 354) 'ten == some_num': bool
|
|
[346; 354) 'some_num': usize
|
|
[361; 364) 'ten': usize
|
|
[361; 368) 'ten < 3': bool
|
|
[367; 368) '3': usize
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_shift_op() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
fn test() {
|
|
1u32 << 5u8;
|
|
1u32 >> 5u8;
|
|
}
|
|
"#),
|
|
@r###"
|
|
[11; 48) '{ ...5u8; }': ()
|
|
[17; 21) '1u32': u32
|
|
[17; 28) '1u32 << 5u8': u32
|
|
[25; 28) '5u8': u8
|
|
[34; 38) '1u32': u32
|
|
[34; 45) '1u32 >> 5u8': u32
|
|
[42; 45) '5u8': u8
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_field_autoderef() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
struct A {
|
|
b: B,
|
|
}
|
|
struct B;
|
|
|
|
fn test1(a: A) {
|
|
let a1 = a;
|
|
a1.b;
|
|
let a2 = &a;
|
|
a2.b;
|
|
let a3 = &mut a;
|
|
a3.b;
|
|
let a4 = &&&&&&&a;
|
|
a4.b;
|
|
let a5 = &mut &&mut &&mut a;
|
|
a5.b;
|
|
}
|
|
|
|
fn test2(a1: *const A, a2: *mut A) {
|
|
a1.b;
|
|
a2.b;
|
|
}
|
|
"#),
|
|
@r###"
|
|
[44; 45) 'a': A
|
|
[50; 213) '{ ...5.b; }': ()
|
|
[60; 62) 'a1': A
|
|
[65; 66) 'a': A
|
|
[72; 74) 'a1': A
|
|
[72; 76) 'a1.b': B
|
|
[86; 88) 'a2': &A
|
|
[91; 93) '&a': &A
|
|
[92; 93) 'a': A
|
|
[99; 101) 'a2': &A
|
|
[99; 103) 'a2.b': B
|
|
[113; 115) 'a3': &mut A
|
|
[118; 124) '&mut a': &mut A
|
|
[123; 124) 'a': A
|
|
[130; 132) 'a3': &mut A
|
|
[130; 134) 'a3.b': B
|
|
[144; 146) 'a4': &&&&&&&A
|
|
[149; 157) '&&&&&&&a': &&&&&&&A
|
|
[150; 157) '&&&&&&a': &&&&&&A
|
|
[151; 157) '&&&&&a': &&&&&A
|
|
[152; 157) '&&&&a': &&&&A
|
|
[153; 157) '&&&a': &&&A
|
|
[154; 157) '&&a': &&A
|
|
[155; 157) '&a': &A
|
|
[156; 157) 'a': A
|
|
[163; 165) 'a4': &&&&&&&A
|
|
[163; 167) 'a4.b': B
|
|
[177; 179) 'a5': &mut &&mut &&mut A
|
|
[182; 200) '&mut &...&mut a': &mut &&mut &&mut A
|
|
[187; 200) '&&mut &&mut a': &&mut &&mut A
|
|
[188; 200) '&mut &&mut a': &mut &&mut A
|
|
[193; 200) '&&mut a': &&mut A
|
|
[194; 200) '&mut a': &mut A
|
|
[199; 200) 'a': A
|
|
[206; 208) 'a5': &mut &&mut &&mut A
|
|
[206; 210) 'a5.b': B
|
|
[224; 226) 'a1': *const A
|
|
[238; 240) 'a2': *mut A
|
|
[250; 273) '{ ...2.b; }': ()
|
|
[256; 258) 'a1': *const A
|
|
[256; 260) 'a1.b': B
|
|
[266; 268) 'a2': *mut A
|
|
[266; 270) 'a2.b': B
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_argument_autoderef() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
#[lang = "deref"]
|
|
pub trait Deref {
|
|
type Target;
|
|
fn deref(&self) -> &Self::Target;
|
|
}
|
|
|
|
struct A<T>(T);
|
|
|
|
impl<T> A<T> {
|
|
fn foo(&self) -> &T {
|
|
&self.0
|
|
}
|
|
}
|
|
|
|
struct B<T>(T);
|
|
|
|
impl<T> Deref for B<T> {
|
|
type Target = T;
|
|
fn deref(&self) -> &Self::Target {
|
|
&self.0
|
|
}
|
|
}
|
|
|
|
fn test() {
|
|
let t = A::foo(&&B(B(A(42))));
|
|
}
|
|
"#),
|
|
@r###"
|
|
[68; 72) 'self': &Self
|
|
[139; 143) 'self': &A<T>
|
|
[151; 174) '{ ... }': &T
|
|
[161; 168) '&self.0': &T
|
|
[162; 166) 'self': &A<T>
|
|
[162; 168) 'self.0': T
|
|
[255; 259) 'self': &B<T>
|
|
[278; 301) '{ ... }': &T
|
|
[288; 295) '&self.0': &T
|
|
[289; 293) 'self': &B<T>
|
|
[289; 295) 'self.0': T
|
|
[315; 353) '{ ...))); }': ()
|
|
[325; 326) 't': &i32
|
|
[329; 335) 'A::foo': fn foo<i32>(&A<i32>) -> &i32
|
|
[329; 350) 'A::foo...42))))': &i32
|
|
[336; 349) '&&B(B(A(42)))': &&B<B<A<i32>>>
|
|
[337; 349) '&B(B(A(42)))': &B<B<A<i32>>>
|
|
[338; 339) 'B': B<B<A<i32>>>(B<A<i32>>) -> B<B<A<i32>>>
|
|
[338; 349) 'B(B(A(42)))': B<B<A<i32>>>
|
|
[340; 341) 'B': B<A<i32>>(A<i32>) -> B<A<i32>>
|
|
[340; 348) 'B(A(42))': B<A<i32>>
|
|
[342; 343) 'A': A<i32>(i32) -> A<i32>
|
|
[342; 347) 'A(42)': A<i32>
|
|
[344; 346) '42': i32
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_method_argument_autoderef() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
#[lang = "deref"]
|
|
pub trait Deref {
|
|
type Target;
|
|
fn deref(&self) -> &Self::Target;
|
|
}
|
|
|
|
struct A<T>(*mut T);
|
|
|
|
impl<T> A<T> {
|
|
fn foo(&self, x: &A<T>) -> &T {
|
|
&*x.0
|
|
}
|
|
}
|
|
|
|
struct B<T>(T);
|
|
|
|
impl<T> Deref for B<T> {
|
|
type Target = T;
|
|
fn deref(&self) -> &Self::Target {
|
|
&self.0
|
|
}
|
|
}
|
|
|
|
fn test(a: A<i32>) {
|
|
let t = A(0 as *mut _).foo(&&B(B(a)));
|
|
}
|
|
"#),
|
|
@r###"
|
|
[68; 72) 'self': &Self
|
|
[144; 148) 'self': &A<T>
|
|
[150; 151) 'x': &A<T>
|
|
[166; 187) '{ ... }': &T
|
|
[176; 181) '&*x.0': &T
|
|
[177; 181) '*x.0': T
|
|
[178; 179) 'x': &A<T>
|
|
[178; 181) 'x.0': *mut T
|
|
[268; 272) 'self': &B<T>
|
|
[291; 314) '{ ... }': &T
|
|
[301; 308) '&self.0': &T
|
|
[302; 306) 'self': &B<T>
|
|
[302; 308) 'self.0': T
|
|
[326; 327) 'a': A<i32>
|
|
[337; 383) '{ ...))); }': ()
|
|
[347; 348) 't': &i32
|
|
[351; 352) 'A': A<i32>(*mut i32) -> A<i32>
|
|
[351; 365) 'A(0 as *mut _)': A<i32>
|
|
[351; 380) 'A(0 as...B(a)))': &i32
|
|
[353; 354) '0': i32
|
|
[353; 364) '0 as *mut _': *mut i32
|
|
[370; 379) '&&B(B(a))': &&B<B<A<i32>>>
|
|
[371; 379) '&B(B(a))': &B<B<A<i32>>>
|
|
[372; 373) 'B': B<B<A<i32>>>(B<A<i32>>) -> B<B<A<i32>>>
|
|
[372; 379) 'B(B(a))': B<B<A<i32>>>
|
|
[374; 375) 'B': B<A<i32>>(A<i32>) -> B<A<i32>>
|
|
[374; 378) 'B(a)': B<A<i32>>
|
|
[376; 377) 'a': A<i32>
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_in_elseif() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
struct Foo { field: i32 }
|
|
fn main(foo: Foo) {
|
|
if true {
|
|
|
|
} else if false {
|
|
foo.field
|
|
}
|
|
}
|
|
"#),
|
|
@r###"
|
|
[35; 38) 'foo': Foo
|
|
[45; 109) '{ ... } }': ()
|
|
[51; 107) 'if tru... }': ()
|
|
[54; 58) 'true': bool
|
|
[59; 67) '{ }': ()
|
|
[73; 107) 'if fal... }': ()
|
|
[76; 81) 'false': bool
|
|
[82; 107) '{ ... }': i32
|
|
[92; 95) 'foo': Foo
|
|
[92; 101) 'foo.field': i32
|
|
"###
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn infer_if_match_with_return() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
fn foo() {
|
|
let _x1 = if true {
|
|
1
|
|
} else {
|
|
return;
|
|
};
|
|
let _x2 = if true {
|
|
2
|
|
} else {
|
|
return
|
|
};
|
|
let _x3 = match true {
|
|
true => 3,
|
|
_ => {
|
|
return;
|
|
}
|
|
};
|
|
let _x4 = match true {
|
|
true => 4,
|
|
_ => return
|
|
};
|
|
}"#),
|
|
@r###"
|
|
[10; 323) '{ ... }; }': ()
|
|
[20; 23) '_x1': i32
|
|
[26; 80) 'if tru... }': i32
|
|
[29; 33) 'true': bool
|
|
[34; 51) '{ ... }': i32
|
|
[44; 45) '1': i32
|
|
[57; 80) '{ ... }': !
|
|
[67; 73) 'return': !
|
|
[90; 93) '_x2': i32
|
|
[96; 149) 'if tru... }': i32
|
|
[99; 103) 'true': bool
|
|
[104; 121) '{ ... }': i32
|
|
[114; 115) '2': i32
|
|
[127; 149) '{ ... }': !
|
|
[137; 143) 'return': !
|
|
[159; 162) '_x3': i32
|
|
[165; 247) 'match ... }': i32
|
|
[171; 175) 'true': bool
|
|
[186; 190) 'true': bool
|
|
[186; 190) 'true': bool
|
|
[194; 195) '3': i32
|
|
[205; 206) '_': bool
|
|
[210; 241) '{ ... }': !
|
|
[224; 230) 'return': !
|
|
[257; 260) '_x4': i32
|
|
[263; 320) 'match ... }': i32
|
|
[269; 273) 'true': bool
|
|
[284; 288) 'true': bool
|
|
[284; 288) 'true': bool
|
|
[292; 293) '4': i32
|
|
[303; 304) '_': bool
|
|
[308; 314) 'return': !
|
|
"###
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn infer_inherent_method() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
struct A;
|
|
|
|
impl A {
|
|
fn foo(self, x: u32) -> i32 {}
|
|
}
|
|
|
|
mod b {
|
|
impl super::A {
|
|
fn bar(&self, x: u64) -> i64 {}
|
|
}
|
|
}
|
|
|
|
fn test(a: A) {
|
|
a.foo(1);
|
|
(&a).bar(1);
|
|
a.bar(1);
|
|
}
|
|
"#),
|
|
@r###"
|
|
[32; 36) 'self': A
|
|
[38; 39) 'x': u32
|
|
[53; 55) '{}': ()
|
|
[103; 107) 'self': &A
|
|
[109; 110) 'x': u64
|
|
[124; 126) '{}': ()
|
|
[144; 145) 'a': A
|
|
[150; 198) '{ ...(1); }': ()
|
|
[156; 157) 'a': A
|
|
[156; 164) 'a.foo(1)': i32
|
|
[162; 163) '1': u32
|
|
[170; 181) '(&a).bar(1)': i64
|
|
[171; 173) '&a': &A
|
|
[172; 173) 'a': A
|
|
[179; 180) '1': u64
|
|
[187; 188) 'a': A
|
|
[187; 195) 'a.bar(1)': i64
|
|
[193; 194) '1': u64
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_inherent_method_str() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
#[lang = "str"]
|
|
impl str {
|
|
fn foo(&self) -> i32 {}
|
|
}
|
|
|
|
fn test() {
|
|
"foo".foo();
|
|
}
|
|
"#),
|
|
@r###"
|
|
[40; 44) 'self': &str
|
|
[53; 55) '{}': ()
|
|
[69; 89) '{ ...o(); }': ()
|
|
[75; 80) '"foo"': &str
|
|
[75; 86) '"foo".foo()': i32
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_tuple() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
fn test(x: &str, y: isize) {
|
|
let a: (u32, &str) = (1, "a");
|
|
let b = (a, x);
|
|
let c = (y, x);
|
|
let d = (c, x);
|
|
let e = (1, "e");
|
|
let f = (e, "d");
|
|
}
|
|
"#),
|
|
@r###"
|
|
[9; 10) 'x': &str
|
|
[18; 19) 'y': isize
|
|
[28; 170) '{ ...d"); }': ()
|
|
[38; 39) 'a': (u32, &str)
|
|
[55; 63) '(1, "a")': (u32, &str)
|
|
[56; 57) '1': u32
|
|
[59; 62) '"a"': &str
|
|
[73; 74) 'b': ((u32, &str), &str)
|
|
[77; 83) '(a, x)': ((u32, &str), &str)
|
|
[78; 79) 'a': (u32, &str)
|
|
[81; 82) 'x': &str
|
|
[93; 94) 'c': (isize, &str)
|
|
[97; 103) '(y, x)': (isize, &str)
|
|
[98; 99) 'y': isize
|
|
[101; 102) 'x': &str
|
|
[113; 114) 'd': ((isize, &str), &str)
|
|
[117; 123) '(c, x)': ((isize, &str), &str)
|
|
[118; 119) 'c': (isize, &str)
|
|
[121; 122) 'x': &str
|
|
[133; 134) 'e': (i32, &str)
|
|
[137; 145) '(1, "e")': (i32, &str)
|
|
[138; 139) '1': i32
|
|
[141; 144) '"e"': &str
|
|
[155; 156) 'f': ((i32, &str), &str)
|
|
[159; 167) '(e, "d")': ((i32, &str), &str)
|
|
[160; 161) 'e': (i32, &str)
|
|
[163; 166) '"d"': &str
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_array() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
fn test(x: &str, y: isize) {
|
|
let a = [x];
|
|
let b = [a, a];
|
|
let c = [b, b];
|
|
|
|
let d = [y, 1, 2, 3];
|
|
let d = [1, y, 2, 3];
|
|
let e = [y];
|
|
let f = [d, d];
|
|
let g = [e, e];
|
|
|
|
let h = [1, 2];
|
|
let i = ["a", "b"];
|
|
|
|
let b = [a, ["b"]];
|
|
let x: [u8; 0] = [];
|
|
}
|
|
"#),
|
|
@r###"
|
|
[9; 10) 'x': &str
|
|
[18; 19) 'y': isize
|
|
[28; 293) '{ ... []; }': ()
|
|
[38; 39) 'a': [&str; _]
|
|
[42; 45) '[x]': [&str; _]
|
|
[43; 44) 'x': &str
|
|
[55; 56) 'b': [[&str; _]; _]
|
|
[59; 65) '[a, a]': [[&str; _]; _]
|
|
[60; 61) 'a': [&str; _]
|
|
[63; 64) 'a': [&str; _]
|
|
[75; 76) 'c': [[[&str; _]; _]; _]
|
|
[79; 85) '[b, b]': [[[&str; _]; _]; _]
|
|
[80; 81) 'b': [[&str; _]; _]
|
|
[83; 84) 'b': [[&str; _]; _]
|
|
[96; 97) 'd': [isize; _]
|
|
[100; 112) '[y, 1, 2, 3]': [isize; _]
|
|
[101; 102) 'y': isize
|
|
[104; 105) '1': isize
|
|
[107; 108) '2': isize
|
|
[110; 111) '3': isize
|
|
[122; 123) 'd': [isize; _]
|
|
[126; 138) '[1, y, 2, 3]': [isize; _]
|
|
[127; 128) '1': isize
|
|
[130; 131) 'y': isize
|
|
[133; 134) '2': isize
|
|
[136; 137) '3': isize
|
|
[148; 149) 'e': [isize; _]
|
|
[152; 155) '[y]': [isize; _]
|
|
[153; 154) 'y': isize
|
|
[165; 166) 'f': [[isize; _]; _]
|
|
[169; 175) '[d, d]': [[isize; _]; _]
|
|
[170; 171) 'd': [isize; _]
|
|
[173; 174) 'd': [isize; _]
|
|
[185; 186) 'g': [[isize; _]; _]
|
|
[189; 195) '[e, e]': [[isize; _]; _]
|
|
[190; 191) 'e': [isize; _]
|
|
[193; 194) 'e': [isize; _]
|
|
[206; 207) 'h': [i32; _]
|
|
[210; 216) '[1, 2]': [i32; _]
|
|
[211; 212) '1': i32
|
|
[214; 215) '2': i32
|
|
[226; 227) 'i': [&str; _]
|
|
[230; 240) '["a", "b"]': [&str; _]
|
|
[231; 234) '"a"': &str
|
|
[236; 239) '"b"': &str
|
|
[251; 252) 'b': [[&str; _]; _]
|
|
[255; 265) '[a, ["b"]]': [[&str; _]; _]
|
|
[256; 257) 'a': [&str; _]
|
|
[259; 264) '["b"]': [&str; _]
|
|
[260; 263) '"b"': &str
|
|
[275; 276) 'x': [u8; _]
|
|
[288; 290) '[]': [u8; _]
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_struct_generics() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
struct A<T> {
|
|
x: T,
|
|
}
|
|
|
|
fn test(a1: A<u32>, i: i32) {
|
|
a1.x;
|
|
let a2 = A { x: i };
|
|
a2.x;
|
|
let a3 = A::<i128> { x: 1 };
|
|
a3.x;
|
|
}
|
|
"#),
|
|
@r###"
|
|
[36; 38) 'a1': A<u32>
|
|
[48; 49) 'i': i32
|
|
[56; 147) '{ ...3.x; }': ()
|
|
[62; 64) 'a1': A<u32>
|
|
[62; 66) 'a1.x': u32
|
|
[76; 78) 'a2': A<i32>
|
|
[81; 91) 'A { x: i }': A<i32>
|
|
[88; 89) 'i': i32
|
|
[97; 99) 'a2': A<i32>
|
|
[97; 101) 'a2.x': i32
|
|
[111; 113) 'a3': A<i128>
|
|
[116; 134) 'A::<i1...x: 1 }': A<i128>
|
|
[131; 132) '1': i128
|
|
[140; 142) 'a3': A<i128>
|
|
[140; 144) 'a3.x': i128
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_tuple_struct_generics() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
struct A<T>(T);
|
|
enum Option<T> { Some(T), None }
|
|
use Option::*;
|
|
|
|
fn test() {
|
|
A(42);
|
|
A(42u128);
|
|
Some("x");
|
|
Option::Some("x");
|
|
None;
|
|
let x: Option<i64> = None;
|
|
}
|
|
"#),
|
|
@r###"
|
|
[76; 184) '{ ...one; }': ()
|
|
[82; 83) 'A': A<i32>(i32) -> A<i32>
|
|
[82; 87) 'A(42)': A<i32>
|
|
[84; 86) '42': i32
|
|
[93; 94) 'A': A<u128>(u128) -> A<u128>
|
|
[93; 102) 'A(42u128)': A<u128>
|
|
[95; 101) '42u128': u128
|
|
[108; 112) 'Some': Some<&str>(&str) -> Option<&str>
|
|
[108; 117) 'Some("x")': Option<&str>
|
|
[113; 116) '"x"': &str
|
|
[123; 135) 'Option::Some': Some<&str>(&str) -> Option<&str>
|
|
[123; 140) 'Option...e("x")': Option<&str>
|
|
[136; 139) '"x"': &str
|
|
[146; 150) 'None': Option<{unknown}>
|
|
[160; 161) 'x': Option<i64>
|
|
[177; 181) 'None': Option<i64>
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_function_generics() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
fn id<T>(t: T) -> T { t }
|
|
|
|
fn test() {
|
|
id(1u32);
|
|
id::<i128>(1);
|
|
let x: u64 = id(1);
|
|
}
|
|
"#),
|
|
@r###"
|
|
[10; 11) 't': T
|
|
[21; 26) '{ t }': T
|
|
[23; 24) 't': T
|
|
[38; 98) '{ ...(1); }': ()
|
|
[44; 46) 'id': fn id<u32>(u32) -> u32
|
|
[44; 52) 'id(1u32)': u32
|
|
[47; 51) '1u32': u32
|
|
[58; 68) 'id::<i128>': fn id<i128>(i128) -> i128
|
|
[58; 71) 'id::<i128>(1)': i128
|
|
[69; 70) '1': i128
|
|
[81; 82) 'x': u64
|
|
[90; 92) 'id': fn id<u64>(u64) -> u64
|
|
[90; 95) 'id(1)': u64
|
|
[93; 94) '1': u64
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_impl_generics_basic() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
struct A<T1, T2> {
|
|
x: T1,
|
|
y: T2,
|
|
}
|
|
impl<Y, X> A<X, Y> {
|
|
fn x(self) -> X {
|
|
self.x
|
|
}
|
|
fn y(self) -> Y {
|
|
self.y
|
|
}
|
|
fn z<T>(self, t: T) -> (X, Y, T) {
|
|
(self.x, self.y, t)
|
|
}
|
|
}
|
|
|
|
fn test() -> i128 {
|
|
let a = A { x: 1u64, y: 1i64 };
|
|
a.x();
|
|
a.y();
|
|
a.z(1i128);
|
|
a.z::<u128>(1);
|
|
}
|
|
"#),
|
|
@r###"
|
|
[74; 78) 'self': A<X, Y>
|
|
[85; 107) '{ ... }': X
|
|
[95; 99) 'self': A<X, Y>
|
|
[95; 101) 'self.x': X
|
|
[117; 121) 'self': A<X, Y>
|
|
[128; 150) '{ ... }': Y
|
|
[138; 142) 'self': A<X, Y>
|
|
[138; 144) 'self.y': Y
|
|
[163; 167) 'self': A<X, Y>
|
|
[169; 170) 't': T
|
|
[188; 223) '{ ... }': (X, Y, T)
|
|
[198; 217) '(self.....y, t)': (X, Y, T)
|
|
[199; 203) 'self': A<X, Y>
|
|
[199; 205) 'self.x': X
|
|
[207; 211) 'self': A<X, Y>
|
|
[207; 213) 'self.y': Y
|
|
[215; 216) 't': T
|
|
[245; 342) '{ ...(1); }': ()
|
|
[255; 256) 'a': A<u64, i64>
|
|
[259; 281) 'A { x:...1i64 }': A<u64, i64>
|
|
[266; 270) '1u64': u64
|
|
[275; 279) '1i64': i64
|
|
[287; 288) 'a': A<u64, i64>
|
|
[287; 292) 'a.x()': u64
|
|
[298; 299) 'a': A<u64, i64>
|
|
[298; 303) 'a.y()': i64
|
|
[309; 310) 'a': A<u64, i64>
|
|
[309; 319) 'a.z(1i128)': (u64, i64, i128)
|
|
[313; 318) '1i128': i128
|
|
[325; 326) 'a': A<u64, i64>
|
|
[325; 339) 'a.z::<u128>(1)': (u64, i64, u128)
|
|
[337; 338) '1': u128
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_impl_generics_with_autoderef() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
enum Option<T> {
|
|
Some(T),
|
|
None,
|
|
}
|
|
impl<T> Option<T> {
|
|
fn as_ref(&self) -> Option<&T> {}
|
|
}
|
|
fn test(o: Option<u32>) {
|
|
(&o).as_ref();
|
|
o.as_ref();
|
|
}
|
|
"#),
|
|
@r###"
|
|
[78; 82) 'self': &Option<T>
|
|
[98; 100) '{}': ()
|
|
[111; 112) 'o': Option<u32>
|
|
[127; 165) '{ ...f(); }': ()
|
|
[133; 146) '(&o).as_ref()': Option<&u32>
|
|
[134; 136) '&o': &Option<u32>
|
|
[135; 136) 'o': Option<u32>
|
|
[152; 153) 'o': Option<u32>
|
|
[152; 162) 'o.as_ref()': Option<&u32>
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_generic_chain() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
struct A<T> {
|
|
x: T,
|
|
}
|
|
impl<T2> A<T2> {
|
|
fn x(self) -> T2 {
|
|
self.x
|
|
}
|
|
}
|
|
fn id<T>(t: T) -> T { t }
|
|
|
|
fn test() -> i128 {
|
|
let x = 1;
|
|
let y = id(x);
|
|
let a = A { x: id(y) };
|
|
let z = id(a.x);
|
|
let b = A { x: z };
|
|
b.x()
|
|
}
|
|
"#),
|
|
@r###"
|
|
[53; 57) 'self': A<T2>
|
|
[65; 87) '{ ... }': T2
|
|
[75; 79) 'self': A<T2>
|
|
[75; 81) 'self.x': T2
|
|
[99; 100) 't': T
|
|
[110; 115) '{ t }': T
|
|
[112; 113) 't': T
|
|
[135; 261) '{ ....x() }': i128
|
|
[146; 147) 'x': i128
|
|
[150; 151) '1': i128
|
|
[162; 163) 'y': i128
|
|
[166; 168) 'id': fn id<i128>(i128) -> i128
|
|
[166; 171) 'id(x)': i128
|
|
[169; 170) 'x': i128
|
|
[182; 183) 'a': A<i128>
|
|
[186; 200) 'A { x: id(y) }': A<i128>
|
|
[193; 195) 'id': fn id<i128>(i128) -> i128
|
|
[193; 198) 'id(y)': i128
|
|
[196; 197) 'y': i128
|
|
[211; 212) 'z': i128
|
|
[215; 217) 'id': fn id<i128>(i128) -> i128
|
|
[215; 222) 'id(a.x)': i128
|
|
[218; 219) 'a': A<i128>
|
|
[218; 221) 'a.x': i128
|
|
[233; 234) 'b': A<i128>
|
|
[237; 247) 'A { x: z }': A<i128>
|
|
[244; 245) 'z': i128
|
|
[254; 255) 'b': A<i128>
|
|
[254; 259) 'b.x()': i128
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_associated_const() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
struct Struct;
|
|
|
|
impl Struct {
|
|
const FOO: u32 = 1;
|
|
}
|
|
|
|
enum Enum {}
|
|
|
|
impl Enum {
|
|
const BAR: u32 = 2;
|
|
}
|
|
|
|
trait Trait {
|
|
const ID: u32;
|
|
}
|
|
|
|
struct TraitTest;
|
|
|
|
impl Trait for TraitTest {
|
|
const ID: u32 = 5;
|
|
}
|
|
|
|
fn test() {
|
|
let x = Struct::FOO;
|
|
let y = Enum::BAR;
|
|
let z = TraitTest::ID;
|
|
}
|
|
"#),
|
|
@r###"
|
|
[52; 53) '1': u32
|
|
[105; 106) '2': u32
|
|
[213; 214) '5': u32
|
|
[229; 307) '{ ...:ID; }': ()
|
|
[239; 240) 'x': u32
|
|
[243; 254) 'Struct::FOO': u32
|
|
[264; 265) 'y': u32
|
|
[268; 277) 'Enum::BAR': u32
|
|
[287; 288) 'z': u32
|
|
[291; 304) 'TraitTest::ID': u32
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_type_alias() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
struct A<X, Y> { x: X, y: Y }
|
|
type Foo = A<u32, i128>;
|
|
type Bar<T> = A<T, u128>;
|
|
type Baz<U, V> = A<V, U>;
|
|
fn test(x: Foo, y: Bar<&str>, z: Baz<i8, u8>) {
|
|
x.x;
|
|
x.y;
|
|
y.x;
|
|
y.y;
|
|
z.x;
|
|
z.y;
|
|
}
|
|
"#),
|
|
@r###"
|
|
[116; 117) 'x': A<u32, i128>
|
|
[124; 125) 'y': A<&str, u128>
|
|
[138; 139) 'z': A<u8, i8>
|
|
[154; 211) '{ ...z.y; }': ()
|
|
[160; 161) 'x': A<u32, i128>
|
|
[160; 163) 'x.x': u32
|
|
[169; 170) 'x': A<u32, i128>
|
|
[169; 172) 'x.y': i128
|
|
[178; 179) 'y': A<&str, u128>
|
|
[178; 181) 'y.x': &str
|
|
[187; 188) 'y': A<&str, u128>
|
|
[187; 190) 'y.y': u128
|
|
[196; 197) 'z': A<u8, i8>
|
|
[196; 199) 'z.x': u8
|
|
[205; 206) 'z': A<u8, i8>
|
|
[205; 208) 'z.y': i8
|
|
"###
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn recursive_type_alias() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
struct A<X> {}
|
|
type Foo = Foo;
|
|
type Bar = A<Bar>;
|
|
fn test(x: Foo) {}
|
|
"#),
|
|
@r###"
|
|
[59; 60) 'x': {unknown}
|
|
[67; 69) '{}': ()
|
|
"###
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn infer_type_param() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
fn id<T>(x: T) -> T {
|
|
x
|
|
}
|
|
|
|
fn clone<T>(x: &T) -> T {
|
|
*x
|
|
}
|
|
|
|
fn test() {
|
|
let y = 10u32;
|
|
id(y);
|
|
let x: bool = clone(z);
|
|
id::<i128>(1);
|
|
}
|
|
"#),
|
|
@r###"
|
|
[10; 11) 'x': T
|
|
[21; 30) '{ x }': T
|
|
[27; 28) 'x': T
|
|
[44; 45) 'x': &T
|
|
[56; 66) '{ *x }': T
|
|
[62; 64) '*x': T
|
|
[63; 64) 'x': &T
|
|
[78; 158) '{ ...(1); }': ()
|
|
[88; 89) 'y': u32
|
|
[92; 97) '10u32': u32
|
|
[103; 105) 'id': fn id<u32>(u32) -> u32
|
|
[103; 108) 'id(y)': u32
|
|
[106; 107) 'y': u32
|
|
[118; 119) 'x': bool
|
|
[128; 133) 'clone': fn clone<bool>(&bool) -> bool
|
|
[128; 136) 'clone(z)': bool
|
|
[134; 135) 'z': &bool
|
|
[142; 152) 'id::<i128>': fn id<i128>(i128) -> i128
|
|
[142; 155) 'id::<i128>(1)': i128
|
|
[153; 154) '1': i128
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_const() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
struct Foo;
|
|
impl Foo { const ASSOC_CONST: u32 = 0; }
|
|
const GLOBAL_CONST: u32 = 101;
|
|
fn test() {
|
|
const LOCAL_CONST: u32 = 99;
|
|
let x = LOCAL_CONST;
|
|
let z = GLOBAL_CONST;
|
|
let id = Foo::ASSOC_CONST;
|
|
}
|
|
"#),
|
|
@r###"
|
|
[49; 50) '0': u32
|
|
[80; 83) '101': u32
|
|
[95; 213) '{ ...NST; }': ()
|
|
[138; 139) 'x': u32
|
|
[142; 153) 'LOCAL_CONST': u32
|
|
[163; 164) 'z': u32
|
|
[167; 179) 'GLOBAL_CONST': u32
|
|
[189; 191) 'id': u32
|
|
[194; 210) 'Foo::A..._CONST': u32
|
|
[126; 128) '99': u32
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn infer_static() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
static GLOBAL_STATIC: u32 = 101;
|
|
static mut GLOBAL_STATIC_MUT: u32 = 101;
|
|
fn test() {
|
|
static LOCAL_STATIC: u32 = 99;
|
|
static mut LOCAL_STATIC_MUT: u32 = 99;
|
|
let x = LOCAL_STATIC;
|
|
let y = LOCAL_STATIC_MUT;
|
|
let z = GLOBAL_STATIC;
|
|
let w = GLOBAL_STATIC_MUT;
|
|
}
|
|
"#),
|
|
@r###"
|
|
[29; 32) '101': u32
|
|
[70; 73) '101': u32
|
|
[85; 280) '{ ...MUT; }': ()
|
|
[173; 174) 'x': u32
|
|
[177; 189) 'LOCAL_STATIC': u32
|
|
[199; 200) 'y': u32
|
|
[203; 219) 'LOCAL_...IC_MUT': u32
|
|
[229; 230) 'z': u32
|
|
[233; 246) 'GLOBAL_STATIC': u32
|
|
[256; 257) 'w': u32
|
|
[260; 277) 'GLOBAL...IC_MUT': u32
|
|
[118; 120) '99': u32
|
|
[161; 163) '99': u32
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn shadowing_primitive() {
|
|
let t = type_at(
|
|
r#"
|
|
//- /main.rs
|
|
struct i32;
|
|
struct Foo;
|
|
|
|
impl i32 { fn foo(&self) -> Foo { Foo } }
|
|
|
|
fn main() {
|
|
let x: i32 = i32;
|
|
x.foo()<|>;
|
|
}"#,
|
|
);
|
|
assert_eq!(t, "Foo");
|
|
}
|
|
|
|
#[test]
|
|
fn not_shadowing_primitive_by_module() {
|
|
let t = type_at(
|
|
r#"
|
|
//- /str.rs
|
|
fn foo() {}
|
|
|
|
//- /main.rs
|
|
mod str;
|
|
fn foo() -> &'static str { "" }
|
|
|
|
fn main() {
|
|
foo()<|>;
|
|
}"#,
|
|
);
|
|
assert_eq!(t, "&str");
|
|
}
|
|
|
|
#[test]
|
|
fn not_shadowing_module_by_primitive() {
|
|
let t = type_at(
|
|
r#"
|
|
//- /str.rs
|
|
fn foo() -> u32 {0}
|
|
|
|
//- /main.rs
|
|
mod str;
|
|
fn foo() -> &'static str { "" }
|
|
|
|
fn main() {
|
|
str::foo()<|>;
|
|
}"#,
|
|
);
|
|
assert_eq!(t, "u32");
|
|
}
|
|
|
|
#[test]
|
|
fn closure_return() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
fn foo() -> u32 {
|
|
let x = || -> usize { return 1; };
|
|
}
|
|
"#),
|
|
@r###"
|
|
[17; 59) '{ ...; }; }': ()
|
|
[27; 28) 'x': || -> usize
|
|
[31; 56) '|| -> ...n 1; }': || -> usize
|
|
[43; 56) '{ return 1; }': !
|
|
[45; 53) 'return 1': !
|
|
[52; 53) '1': usize
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn closure_return_unit() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
fn foo() -> u32 {
|
|
let x = || { return; };
|
|
}
|
|
"#),
|
|
@r###"
|
|
[17; 48) '{ ...; }; }': ()
|
|
[27; 28) 'x': || -> ()
|
|
[31; 45) '|| { return; }': || -> ()
|
|
[34; 45) '{ return; }': !
|
|
[36; 42) 'return': !
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn closure_return_inferred() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
fn foo() -> u32 {
|
|
let x = || { "test" };
|
|
}
|
|
"#),
|
|
@r###"
|
|
[17; 47) '{ ..." }; }': ()
|
|
[27; 28) 'x': || -> &str
|
|
[31; 44) '|| { "test" }': || -> &str
|
|
[34; 44) '{ "test" }': &str
|
|
[36; 42) '"test"': &str
|
|
"###
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn fn_pointer_return() {
|
|
assert_snapshot!(
|
|
infer(r#"
|
|
struct Vtable {
|
|
method: fn(),
|
|
}
|
|
|
|
fn main() {
|
|
let vtable = Vtable { method: || {} };
|
|
let m = vtable.method;
|
|
}
|
|
"#),
|
|
@r###"
|
|
[48; 121) '{ ...hod; }': ()
|
|
[58; 64) 'vtable': Vtable
|
|
[67; 91) 'Vtable...| {} }': Vtable
|
|
[84; 89) '|| {}': || -> ()
|
|
[87; 89) '{}': ()
|
|
[101; 102) 'm': fn()
|
|
[105; 111) 'vtable': Vtable
|
|
[105; 118) 'vtable.method': fn()
|
|
"###
|
|
);
|
|
}
|