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| author | Aleksey Kladov <aleksey.kladov@gmail.com> | 2019-04-25 11:48:25 +0300 |
|---|---|---|
| committer | Aleksey Kladov <aleksey.kladov@gmail.com> | 2019-05-02 15:31:57 +0300 |
| commit | bfa5f278472d0bad4e7db4a4259b2f1fa97ca0ab (patch) | |
| tree | bb27691d38cfe85ef181ea8d2cb7609da12cbe91 /src/test/ui/parser/macro | |
| parent | 9b67bd42b7cbf97f72d039afcba02f5177d0d68c (diff) | |
| download | rust-bfa5f278472d0bad4e7db4a4259b2f1fa97ca0ab.tar.gz rust-bfa5f278472d0bad4e7db4a4259b2f1fa97ca0ab.zip | |
introduce unescape module
Currently, we deal with escape sequences twice: once when we lex a string, and a second time when we unescape literals. This PR aims to remove this duplication, by introducing a new `unescape` mode as a single source of truth for character escaping rules
Diffstat (limited to 'src/test/ui/parser/macro')
| -rw-r--r-- | src/test/ui/parser/macro/literals-are-validated-before-expansion.rs | 10 | ||||
| -rw-r--r-- | src/test/ui/parser/macro/literals-are-validated-before-expansion.stderr | 18 |
2 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/parser/macro/literals-are-validated-before-expansion.rs b/src/test/ui/parser/macro/literals-are-validated-before-expansion.rs new file mode 100644 index 00000000000..c3fc754b556 --- /dev/null +++ b/src/test/ui/parser/macro/literals-are-validated-before-expansion.rs @@ -0,0 +1,10 @@ +macro_rules! black_hole { + ($($tt:tt)*) => {} +} + +fn main() { + black_hole! { '\u{FFFFFF}' } + //~^ ERROR: invalid unicode character escape + black_hole! { "this is surrogate: \u{DAAA}" } + //~^ ERROR: invalid unicode character escape +} diff --git a/src/test/ui/parser/macro/literals-are-validated-before-expansion.stderr b/src/test/ui/parser/macro/literals-are-validated-before-expansion.stderr new file mode 100644 index 00000000000..d20eb0fb30a --- /dev/null +++ b/src/test/ui/parser/macro/literals-are-validated-before-expansion.stderr @@ -0,0 +1,18 @@ +error: invalid unicode character escape + --> $DIR/literals-are-validated-before-expansion.rs:6:20 + | +LL | black_hole! { '\u{FFFFFF}' } + | ^^^^^^^^^^ + | + = help: unicode escape must be at most 10FFFF + +error: invalid unicode character escape + --> $DIR/literals-are-validated-before-expansion.rs:8:39 + | +LL | black_hole! { "this is surrogate: \u{DAAA}" } + | ^^^^^^^^ + | + = help: unicode escape must not be a surrogate + +error: aborting due to 2 previous errors + |