rust/tests/run-make/rustc-macro-dep-files/foo.rs

#![crate_type = "proc-macro"]

extern crate proc_macro;

use proc_macro::TokenStream;

#[proc_macro_derive(A)]
pub fn derive(input: TokenStream) -> TokenStream {
    let input = input.to_string();
    assert!(input.contains("struct A;"));
    "struct B;".parse().unwrap()
}
rustc: Rename rustc_macro to proc_macro This commit blanket renames the `rustc_macro` infrastructure to `proc_macro`, which reflects the general consensus of #35900. A follow up PR to Cargo will be required to purge the `rustc-macro` name as well. 2016-10-03 11:49:39 -05:00			`#![crate_type = "proc-macro"]`
rustc: Use a special filename for macros 1.1 This "special filename" is surrounded by `<>` to ensure that `FileMap::is_real_file` returns `false`. This way the "files" parsed here aren't emitted as dep info `.d` files and don't confuse Cargo about non-existent files. Closes #36625 2016-09-27 13:19:03 -05:00
rustc: Rename rustc_macro to proc_macro This commit blanket renames the `rustc_macro` infrastructure to `proc_macro`, which reflects the general consensus of #35900. A follow up PR to Cargo will be required to purge the `rustc-macro` name as well. 2016-10-03 11:49:39 -05:00			`extern crate proc_macro;`
rustc: Use a special filename for macros 1.1 This "special filename" is surrounded by `<>` to ensure that `FileMap::is_real_file` returns `false`. This way the "files" parsed here aren't emitted as dep info `.d` files and don't confuse Cargo about non-existent files. Closes #36625 2016-09-27 13:19:03 -05:00
rustc: Rename rustc_macro to proc_macro This commit blanket renames the `rustc_macro` infrastructure to `proc_macro`, which reflects the general consensus of #35900. A follow up PR to Cargo will be required to purge the `rustc-macro` name as well. 2016-10-03 11:49:39 -05:00			`use proc_macro::TokenStream;`
rustc: Use a special filename for macros 1.1 This "special filename" is surrounded by `<>` to ensure that `FileMap::is_real_file` returns `false`. This way the "files" parsed here aren't emitted as dep info `.d` files and don't confuse Cargo about non-existent files. Closes #36625 2016-09-27 13:19:03 -05:00
rustc: Rename rustc_macro to proc_macro This commit blanket renames the `rustc_macro` infrastructure to `proc_macro`, which reflects the general consensus of #35900. A follow up PR to Cargo will be required to purge the `rustc-macro` name as well. 2016-10-03 11:49:39 -05:00			`#[proc_macro_derive(A)]`
rustc: Use a special filename for macros 1.1 This "special filename" is surrounded by `<>` to ensure that `FileMap::is_real_file` returns `false`. This way the "files" parsed here aren't emitted as dep info `.d` files and don't confuse Cargo about non-existent files. Closes #36625 2016-09-27 13:19:03 -05:00			`pub fn derive(input: TokenStream) -> TokenStream {`
			`let input = input.to_string();`
Improve `print_tts` by changing `tokenstream::Spacing`. `tokenstream::Spacing` appears on all `TokenTree::Token` instances, both punct and non-punct. Its current usage: - `Joint` means "can join with the next token and that token is a punct". - `Alone` means "cannot join with the next token or can join with the next token but that token is not a punct". The fact that `Alone` is used for two different cases is awkward. This commit augments `tokenstream::Spacing` with a new variant `JointHidden`, resulting in: - `Joint` means "can join with the next token and that token is a punct". - `JointHidden` means "can join with the next token and that token is a not a punct". - `Alone` means "cannot join with the next token". This drastically improves the output of `print_tts`. For example, this: ``` stringify!(let a: Vec<u32> = vec![];) ``` currently produces this string: ``` let a : Vec < u32 > = vec! [] ; ``` With this PR, it now produces this string: ``` let a: Vec<u32> = vec![] ; ``` (The space after the `]` is because `TokenTree::Delimited` currently doesn't have spacing information. The subsequent commit fixes this.) The new `print_tts` doesn't replicate original code perfectly. E.g. multiple space characters will be condensed into a single space character. But it's much improved. `print_tts` still produces the old, uglier output for code produced by proc macros. Because we have to translate the generated code from `proc_macro::Spacing` to the more expressive `token::Spacing`, which results in too much `proc_macro::Along` usage and no `proc_macro::JointHidden` usage. So `space_between` still exists and is used by `print_tts` in conjunction with the `Spacing` field. This change will also help with the removal of `Token::Interpolated`. Currently interpolated tokens are pretty-printed nicely via AST pretty printing. `Token::Interpolated` removal will mean they get printed with `print_tts`. Without this change, that would result in much uglier output for code produced by decl macro expansions. With this change, AST pretty printing and `print_tts` produce similar results. The commit also tweaks the comments on `proc_macro::Spacing`. In particular, it refers to "compound tokens" rather than "multi-char operators" because lifetimes aren't operators. 2023-08-07 20:43:44 -05:00			`assert!(input.contains("struct A;"));`
rustc: Use a special filename for macros 1.1 This "special filename" is surrounded by `<>` to ensure that `FileMap::is_real_file` returns `false`. This way the "files" parsed here aren't emitted as dep info `.d` files and don't confuse Cargo about non-existent files. Closes #36625 2016-09-27 13:19:03 -05:00			`"struct B;".parse().unwrap()`
			`}`