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https://github.com/rust-lang/rust
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f7d49fdf4f
Instead of using AST pretty printing. This is a step towards removing `token::Interpolated`, which will eventually (in #124141) be replaced with a token stream within invisible delimiters. This changes (improves) the output of the `stringify!` macro in some cases. This is allowed. As the `stringify!` docs say: "Note that the expanded results of the input tokens may change in the future. You should be careful if you rely on the output." Test changes: - tests/ui/macros/stringify.rs: this used to test both token stream pretty printing and AST pretty printing via different ways of invoking of `stringify!` (i.e. `$expr` vs `$tt`). But those two different invocations now give the same result, which is a nice consistency improvement. This removes the need for all the `c2*` macros. The AST pretty printer now has more thorough testing thanks to #125236. - tests/ui/proc-macro/*: minor improvements where small differences between `INPUT (DISPLAY)` output and `DEEP-RE-COLLECTED (DISPLAY)` output disappear.
55 lines
1,018 B
Rust
55 lines
1,018 B
Rust
//@ compile-flags: -Z trace-macros
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#![recursion_limit = "4"]
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macro_rules! my_faulty_macro {
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() => {
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my_faulty_macro!(bcd); //~ ERROR no rules
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};
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}
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macro_rules! pat_macro {
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() => {
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pat_macro!(A{a:a, b:0, c:_, ..});
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};
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($a:pat) => {
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$a //~ ERROR expected expression
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};
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}
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macro_rules! my_recursive_macro {
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() => {
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my_recursive_macro!(); //~ ERROR recursion limit
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};
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}
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macro_rules! my_macro {
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() => {};
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}
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fn main() {
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my_faulty_macro!();
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my_recursive_macro!();
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test!();
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non_exisiting!();
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derive!(Debug);
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let a = pat_macro!();
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}
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#[my_macro]
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fn use_bang_macro_as_attr() {}
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#[derive(Debug)] //~ ERROR `derive` may only be applied to `struct`s
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fn use_derive_macro_as_attr() {}
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macro_rules! test {
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(let $p:pat = $e:expr) => {test!(($p,$e))};
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// this should be expr
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// vvv
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(($p:pat, $e:pat)) => {let $p = $e;}; //~ ERROR expected expression, found pattern `1+1`
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}
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fn foo() {
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test!(let x = 1+1);
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}
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