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author | John Hodge <tpg@mutabah.net> | 2016-10-15 11:17:16 +0800 |
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committer | John Hodge <tpg@mutabah.net> | 2016-10-15 11:17:16 +0800 |
commit | be952e5ea5f60edf6d39ebb6f6ec692799c60850 (patch) | |
tree | ff547ef32d7e7e6ba2a41b379eb7f26c933092dc /Notes | |
parent | 7c74d6a7c03af83de0c41260c81460cfe447f8cf (diff) | |
download | mrust-be952e5ea5f60edf6d39ebb6f6ec692799c60850.tar.gz |
Notes - Various quirks
Diffstat (limited to 'Notes')
-rw-r--r-- | Notes/Quirks.md | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Notes/Quirks.md b/Notes/Quirks.md new file mode 100644 index 00000000..258d095e --- /dev/null +++ b/Notes/Quirks.md @@ -0,0 +1,37 @@ + +Methods can be called on some "statement-like" expressions +==== + +https://github.com/rust-lang/rust/blob/master/src/libstd/sys/common/poison.rs#L172 +``` +fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + match *self { + TryLockError::Poisoned(..) => "poisoned lock: another task failed inside", + TryLockError::WouldBlock => "try_lock failed because the operation would block" + }.fmt(f) +} +``` + +Method call on a statement-like match + + +The `ident` fragment matches reserved words +=== + +Typically used for replacing `self` in macros. + + + +Any integer can cast to a pointer +=================== +This includes `u8` + + +Modules with the same name as primtiive types have interesting lookup quirks +=================== +- If a path like `u32::some_name` is seen, if the module `u32` exists in the current scope and `some_name` is an item in that module + - Treat the path as `self::u32::some_name` + - Otherwise, treat it as `<u32 as ?>::some_name` + + + |