Skip to content

Implement ${count()} metavariable expression #14878

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
May 28, 2023
Merged

Implement ${count()} metavariable expression #14878

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
9ebaa85
Split test module for metavariable expressions
lowr May 23, 2023
0d4d1d7
Implement `${count()}` metavariable expression
lowr May 28, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
87 changes: 1 addition & 86 deletions crates/hir-def/src/macro_expansion_tests/mbe.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
mod tt_conversion;
mod matching;
mod meta_syntax;
mod metavar_expr;
mod regression;

use expect_test::expect;
Expand Down Expand Up @@ -1614,92 +1615,6 @@ struct Foo;
)
}

#[test]
fn test_dollar_dollar() {
check(
r#"
macro_rules! register_struct { ($Struct:ident) => {
macro_rules! register_methods { ($$($method:ident),*) => {
macro_rules! implement_methods { ($$$$($$val:expr),*) => {
struct $Struct;
impl $Struct { $$(fn $method() -> &'static [u32] { &[$$$$($$$$val),*] })*}
}}
}}
}}

register_struct!(Foo);
register_methods!(alpha, beta);
implement_methods!(1, 2, 3);
"#,
expect![[r#"
macro_rules! register_struct { ($Struct:ident) => {
macro_rules! register_methods { ($$($method:ident),*) => {
macro_rules! implement_methods { ($$$$($$val:expr),*) => {
struct $Struct;
impl $Struct { $$(fn $method() -> &'static [u32] { &[$$$$($$$$val),*] })*}
}}
}}
}}

macro_rules !register_methods {
($($method: ident), *) = > {
macro_rules!implement_methods {
($$($val: expr), *) = > {
struct Foo;
impl Foo {
$(fn $method()-> &'static[u32] {
&[$$($$val), *]
}
)*
}
}
}
}
}
macro_rules !implement_methods {
($($val: expr), *) = > {
struct Foo;
impl Foo {
fn alpha()-> &'static[u32] {
&[$($val), *]
}
fn beta()-> &'static[u32] {
&[$($val), *]
}
}
}
}
struct Foo;
impl Foo {
fn alpha() -> &'static[u32] {
&[1, 2, 3]
}
fn beta() -> &'static[u32] {
&[1, 2, 3]
}
}
"#]],
)
}

#[test]
fn test_metavar_exprs() {
check(
r#"
macro_rules! m {
( $( $t:tt )* ) => ( $( ${ignore(t)} -${index()} )-* );
}
const _: i32 = m!(a b c);
"#,
expect![[r#"
macro_rules! m {
( $( $t:tt )* ) => ( $( ${ignore(t)} -${index()} )-* );
}
const _: i32 = -0--1--2;
"#]],
);
}

#[test]
fn test_punct_without_space() {
// Puncts are "glued" greedily.
Expand Down
Loading