play | Evaluation of Play 2.8 API and performance using wrk2

You are correct, this is due to match ergonomics. The first case should hopefully be self explanatory, but the second and third cases can be a bit counter-intuitive.

In the second case:

• (x,) is a non-reference pattern (see the second example in the RFC). The t tuple reference is dereferenced, and x is bound as a ref as it also is a non-reference pattern. Note that t.0 was a reference to begin with, thus resulting in x being a double reference.

• (&y,) is also a non-reference pattern. The t tuple is dereferenced again to a (&i32,). However, &y is a reference pattern being matched to a &i32 reference. Hence y is bound with move mode and is an i32.

In the third case:

• Using the same reasoning as the second case, u is dereferenced via Deref coercion to an (i32,), and x, a non-reference pattern, is bound in ref mode. Hence x is an &i32.

• Again with the same reasoning as the second case, u is dereferenced to an (i32,). The &y reference pattern is then matched to an i32, a non-reference, which causes an error.

You missed adding this in your eslint.json file.

I face the same Issue but i solved by writing android:exported="true" in activity bellow the android:name=".MainActivity" image shown

extern "C" on both sides + #[repr(C)] on the Rust side + only using C-compatible types for interfacing between C++ and Rust, should work.

Alternatively, see cxx and autocxx.

The key is to keep a reference to the Task, and if found, await its value.

Perhaps:

Apparently, there is a reference to that, in a github issue - rust-lang/rust#63104:

This conflicts with the existing blanket impl in core.

Turning on the Windows High Contrast Setting does the equivalent of setting an ANSI-C escaped sequence to be bold, in other words: It sets the weight at 700, but I don't think it stops there. I am pretty certain, much like ANSI-C Escape Sequences, and in addition to increasing the font's weight, it also makes the text render brighter.

If you read above, then you pretty much already got the solution, but for clarity's sake I'll reference the solution, in the context of a solution:

1. Open the "Tools Menu" from the windows menu bar (it reads TOOLS).

2. When TOOLS drops open, select "OPTIONS" from that menu (it was near the very bottom for me).

3. The "Options Window" will open, select ENVIRONMENT (it should be the first choice to choose from the list of option-groups).

4. The option groups are folded, so when ENVIRONMENT is pressed, the group should unfold. After ENVIRONMENT unfolds select — "what should be" — the top option, GENERAL.

5. After you choose the GENERAL option in the ENVIRONMENT group, you'll see a bunch of settings open up on the right side side of the settings window that you have opened. If your in the correct location, you'll see a couple bunches of check boxes, and a couple drop-down menus. The setting that you are looking for is the very first check box, and it should clearly read:

You want to DESELECT that option. I repeat, make sure that the checkbox belonging to, "USE WINDOWS HIGH CONTRAST SETTINGS (REQUIRES START)" DOES NOT HAVE A CHECK-MARK INSIDE OF IT!. Make sure that when you finished, and ready to wrap up & return back to the text editor, that you exit via the OKAY, and that you don't exit by simply closing the window using the X button in the upper right-hand corner. Remember that your changes will not be saved unless you use the OKAY button (I have failed to do this in the past and it cost me much valuable time, and made me feel stupid, don't be me).

Right now react only batches sync setStates inside event handlers. But in react 18 it will be available in setTimeout, useEffects etc Here is excellent explanation from Dan https://github.com/reactwg/react-18/discussions/21

For C. The program is valid. The only requirement that applies here is "strict aliasing rule" saying that the object can be accessed only via a l-value of a compatible type (+ a few exception described in 6.5p7).

The compatibility of structures/unions defined in separate translation units is defined in 6.2.7p1.

... two structure, union, or enumerated types declared in separate translation units are compatible if their tags and members satisfy the following requirements: If one is declared with a tag, the other shall be declared with the same tag. If both are completed anywhere within their respective translation units, then the following additional requirements apply: there shall be a one-to-one correspondence between their members such that each pair of corresponding members are declared with compatible types; if one member of the pair is declared with an alignment specifier, the other is declared with an equivalent alignment specifier; and if one member of the pair is declared with a name, the other is declared with the same name. For two structures, corresponding members shall be declared in the same order. For two structures or unions, corresponding bit-fields shall have the same widths. For two enumerations, corresponding members shall have the same values.

Therefore the structures are not compatible in the example.

However, it is not an issue because the f object is created and accessed via locally defined type. UB would be invoked if the object was created with Foo type defined in one translation unit and accessed via other Foo type in the other translation unit: