rust/tests/ui/resolve/suggest-path-instead-of-mod-dot-item.rs

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// Beginners write `mod.item` when they should write `mod::item`.
// This tests that we suggest the latter when we encounter the former.
pub mod a {
pub const I: i32 = 1;
pub fn f() -> i32 { 2 }
pub mod b {
pub const J: i32 = 3;
pub fn g() -> i32 { 4 }
}
}
fn h1() -> i32 {
a.I
//~^ ERROR expected value, found module `a`
//~| HELP use the path separator
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}
fn h2() -> i32 {
a.g()
//~^ ERROR expected value, found module `a`
//~| HELP use the path separator
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}
fn h3() -> i32 {
a.b.J
//~^ ERROR expected value, found module `a`
//~| HELP use the path separator
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}
fn h4() -> i32 {
a::b.J
//~^ ERROR expected value, found module `a::b`
//~| HELP a constant with a similar name exists
//~| HELP use the path separator
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}
fn h5() {
a.b.f();
//~^ ERROR expected value, found module `a`
//~| HELP use the path separator
let v = Vec::new();
v.push(a::b);
//~^ ERROR expected value, found module `a::b`
//~| HELP a constant with a similar name exists
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}
fn h6() -> i32 {
a::b.f()
//~^ ERROR expected value, found module `a::b`
//~| HELP a constant with a similar name exists
//~| HELP use the path separator
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}
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fn h7() {
a::b
//~^ ERROR expected value, found module `a::b`
//~| HELP a constant with a similar name exists
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}
fn h8() -> i32 {
a::b()
//~^ ERROR expected function, found module `a::b`
//~| HELP a constant with a similar name exists
}
macro_rules! module {
() => {
a
//~^ ERROR expected value, found module `a`
//~| ERROR expected value, found module `a`
};
}
macro_rules! create {
(method) => {
a.f()
//~^ ERROR expected value, found module `a`
//~| HELP use the path separator
};
(field) => {
a.f
//~^ ERROR expected value, found module `a`
//~| HELP use the path separator
};
}
fn h9() {
//
// Note that if the receiver is a macro call, we do not want to suggest to replace
// `.` with `::` as that would be a syntax error.
// Since the receiver is a module and not a type, we cannot suggest to surround
// it with angle brackets.
//
module!().g::<()>(); // no `help` here!
module!().g; // no `help` here!
//
// Ensure that the suggestion is shown for expressions inside of macro definitions.
//
let _ = create!(method);
let _ = create!(field);
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}
fn main() {}