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rust/tests/ui/proc-macro/expand-expr.stderr

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proc_macro: Add an expand_expr method to TokenStream This feature is aimed at giving proc macros access to powers similar to those used by builtin macros such as `format_args!` or `concat!`. These macros are able to accept macros in place of string literal parameters, such as the format string, as they perform recursive macro expansion while being expanded. This can be especially useful in many cases thanks to helper macros like `concat!`, `stringify!` and `include_str!` which are often used to construct string literals at compile-time in user code. For now, this method only allows expanding macros which produce literals, although more expresisons will be supported before the method is stabilized.
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error: expected one of `.`, `?`, or an operator, found `;`
ui tests: Remap test base directory by default.
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--> $DIR/expand-expr.rs:108:27
proc_macro: Add an expand_expr method to TokenStream This feature is aimed at giving proc macros access to powers similar to those used by builtin macros such as `format_args!` or `concat!`. These macros are able to accept macros in place of string literal parameters, such as the format string, as they perform recursive macro expansion while being expanded. This can be especially useful in many cases thanks to helper macros like `concat!`, `stringify!` and `include_str!` which are often used to construct string literals at compile-time in user code. For now, this method only allows expanding macros which produce literals, although more expresisons will be supported before the method is stabilized.
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|
LL | expand_expr_fail!("string"; hello);
| ^ expected one of `.`, `?`, or an operator
error: expected expression, found `$`
ui tests: Remap test base directory by default.
2023-01-06 05:49:07 -06:00
--> $DIR/expand-expr.rs:111:19
proc_macro: Add an expand_expr method to TokenStream This feature is aimed at giving proc macros access to powers similar to those used by builtin macros such as `format_args!` or `concat!`. These macros are able to accept macros in place of string literal parameters, such as the format string, as they perform recursive macro expansion while being expanded. This can be especially useful in many cases thanks to helper macros like `concat!`, `stringify!` and `include_str!` which are often used to construct string literals at compile-time in user code. For now, this method only allows expanding macros which produce literals, although more expresisons will be supported before the method is stabilized.
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|
LL | expand_expr_fail!($);
| ^ expected expression
error: expected expression, found `$`
ui tests: Remap test base directory by default.
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--> $DIR/expand-expr.rs:40:23
proc_macro: Add an expand_expr method to TokenStream This feature is aimed at giving proc macros access to powers similar to those used by builtin macros such as `format_args!` or `concat!`. These macros are able to accept macros in place of string literal parameters, such as the format string, as they perform recursive macro expansion while being expanded. This can be especially useful in many cases thanks to helper macros like `concat!`, `stringify!` and `include_str!` which are often used to construct string literals at compile-time in user code. For now, this method only allows expanding macros which produce literals, although more expresisons will be supported before the method is stabilized.
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|
LL | ($($t:tt)*) => { $($t)* };
| ^^^^ expected expression
error: expected expression, found `$`
ui tests: Remap test base directory by default.
2023-01-06 05:49:07 -06:00
--> $DIR/expand-expr.rs:113:28
proc_macro: Add an expand_expr method to TokenStream This feature is aimed at giving proc macros access to powers similar to those used by builtin macros such as `format_args!` or `concat!`. These macros are able to accept macros in place of string literal parameters, such as the format string, as they perform recursive macro expansion while being expanded. This can be especially useful in many cases thanks to helper macros like `concat!`, `stringify!` and `include_str!` which are often used to construct string literals at compile-time in user code. For now, this method only allows expanding macros which produce literals, although more expresisons will be supported before the method is stabilized.
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|
LL | expand_expr_fail!(echo_pm!($));
| ^ expected expression
error: macro expansion ignores token `hello` and any following
ui tests: Remap test base directory by default.
2023-01-06 05:49:07 -06:00
--> $DIR/expand-expr.rs:117:47
proc_macro: Add an expand_expr method to TokenStream This feature is aimed at giving proc macros access to powers similar to those used by builtin macros such as `format_args!` or `concat!`. These macros are able to accept macros in place of string literal parameters, such as the format string, as they perform recursive macro expansion while being expanded. This can be especially useful in many cases thanks to helper macros like `concat!`, `stringify!` and `include_str!` which are often used to construct string literals at compile-time in user code. For now, this method only allows expanding macros which produce literals, although more expresisons will be supported before the method is stabilized.
2021-07-18 14:53:06 -05:00
|
LL | expand_expr_is!("string", echo_tts!("string"; hello));
Migrate parts of `rustc_expand` to session diagnostics This migrates everything but the `mbe` and `proc_macro` modules. It also contains a few cleanups and drive-by/accidental diagnostic improvements which can be seen in the diff for the UI tests.
2022-11-15 07:24:33 -06:00
| --------------------^^^^^- caused by the macro expansion here
proc_macro: Add an expand_expr method to TokenStream This feature is aimed at giving proc macros access to powers similar to those used by builtin macros such as `format_args!` or `concat!`. These macros are able to accept macros in place of string literal parameters, such as the format string, as they perform recursive macro expansion while being expanded. This can be especially useful in many cases thanks to helper macros like `concat!`, `stringify!` and `include_str!` which are often used to construct string literals at compile-time in user code. For now, this method only allows expanding macros which produce literals, although more expresisons will be supported before the method is stabilized.
2021-07-18 14:53:06 -05:00
|
= note: the usage of `echo_tts!` is likely invalid in expression context
Migrate parts of `rustc_expand` to session diagnostics This migrates everything but the `mbe` and `proc_macro` modules. It also contains a few cleanups and drive-by/accidental diagnostic improvements which can be seen in the diff for the UI tests.
2022-11-15 07:24:33 -06:00
help: you might be missing a semicolon here
|
LL | expand_expr_is!("string", echo_tts!("string"; hello););
| +
proc_macro: Add an expand_expr method to TokenStream This feature is aimed at giving proc macros access to powers similar to those used by builtin macros such as `format_args!` or `concat!`. These macros are able to accept macros in place of string literal parameters, such as the format string, as they perform recursive macro expansion while being expanded. This can be especially useful in many cases thanks to helper macros like `concat!`, `stringify!` and `include_str!` which are often used to construct string literals at compile-time in user code. For now, this method only allows expanding macros which produce literals, although more expresisons will be supported before the method is stabilized.
2021-07-18 14:53:06 -05:00
error: macro expansion ignores token `;` and any following
ui tests: Remap test base directory by default.
2023-01-06 05:49:07 -06:00
--> $DIR/expand-expr.rs:118:44
proc_macro: Add an expand_expr method to TokenStream This feature is aimed at giving proc macros access to powers similar to those used by builtin macros such as `format_args!` or `concat!`. These macros are able to accept macros in place of string literal parameters, such as the format string, as they perform recursive macro expansion while being expanded. This can be especially useful in many cases thanks to helper macros like `concat!`, `stringify!` and `include_str!` which are often used to construct string literals at compile-time in user code. For now, this method only allows expanding macros which produce literals, although more expresisons will be supported before the method is stabilized.
2021-07-18 14:53:06 -05:00
|
LL | expand_expr_is!("string", echo_pm!("string"; hello));
Migrate parts of `rustc_expand` to session diagnostics This migrates everything but the `mbe` and `proc_macro` modules. It also contains a few cleanups and drive-by/accidental diagnostic improvements which can be seen in the diff for the UI tests.
2022-11-15 07:24:33 -06:00
| -----------------^------- caused by the macro expansion here
proc_macro: Add an expand_expr method to TokenStream This feature is aimed at giving proc macros access to powers similar to those used by builtin macros such as `format_args!` or `concat!`. These macros are able to accept macros in place of string literal parameters, such as the format string, as they perform recursive macro expansion while being expanded. This can be especially useful in many cases thanks to helper macros like `concat!`, `stringify!` and `include_str!` which are often used to construct string literals at compile-time in user code. For now, this method only allows expanding macros which produce literals, although more expresisons will be supported before the method is stabilized.
2021-07-18 14:53:06 -05:00
|
= note: the usage of `echo_pm!` is likely invalid in expression context
Migrate parts of `rustc_expand` to session diagnostics This migrates everything but the `mbe` and `proc_macro` modules. It also contains a few cleanups and drive-by/accidental diagnostic improvements which can be seen in the diff for the UI tests.
2022-11-15 07:24:33 -06:00
help: you might be missing a semicolon here
|
LL | expand_expr_is!("string", echo_pm!("string"; hello););
| +
proc_macro: Add an expand_expr method to TokenStream This feature is aimed at giving proc macros access to powers similar to those used by builtin macros such as `format_args!` or `concat!`. These macros are able to accept macros in place of string literal parameters, such as the format string, as they perform recursive macro expansion while being expanded. This can be especially useful in many cases thanks to helper macros like `concat!`, `stringify!` and `include_str!` which are often used to construct string literals at compile-time in user code. For now, this method only allows expanding macros which produce literals, although more expresisons will be supported before the method is stabilized.
2021-07-18 14:53:06 -05:00
error: recursion limit reached while expanding `recursive_expand!`
ui tests: Remap test base directory by default.
2023-01-06 05:49:07 -06:00
--> $DIR/expand-expr.rs:126:16
proc_macro: Add an expand_expr method to TokenStream This feature is aimed at giving proc macros access to powers similar to those used by builtin macros such as `format_args!` or `concat!`. These macros are able to accept macros in place of string literal parameters, such as the format string, as they perform recursive macro expansion while being expanded. This can be especially useful in many cases thanks to helper macros like `concat!`, `stringify!` and `include_str!` which are often used to construct string literals at compile-time in user code. For now, this method only allows expanding macros which produce literals, although more expresisons will be supported before the method is stabilized.
2021-07-18 14:53:06 -05:00
|
LL | const _: u32 = recursive_expand!();
| ^^^^^^^^^^^^^^^^^^^
|
= help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`expand_expr`)
= note: this error originates in the macro `recursive_expand` (in Nightly builds, run with -Z macro-backtrace for more info)
error: aborting due to 7 previous errors
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