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Objective

While working on #7784, I noticed that a #define VAR in a .wgsl file is always effective, even if it its scope is not accepting lines.

Example:

#define A
#ifndef A
#define B
#endif

Currently, B will be defined although it shouldn't. This PR fixes that.

Solution

Move the branch responsible for #define lines into the last else branch, which is only evaluated if the current scope is accepting lines.

@alice-i-cecile alice-i-cecile added C-Bug An unexpected or incorrect behavior A-Rendering Drawing game state to the screen labels Feb 23, 2023
@mockersf
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Makes sense! Could you add a test for this case?

@geieredgar
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I've added a test.

@mockersf mockersf added the S-Ready-For-Final-Review This PR has been approved by the community. It's ready for a maintainer to consider merging it label Feb 23, 2023
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Always nice to see regression tests.

bors r+

bors bot pushed a commit that referenced this pull request Feb 24, 2023
# Objective

While working on #7784, I noticed that a `#define VAR` in a `.wgsl` file is always effective, even if it its scope is not accepting lines. 

Example:
```c
#define A
#ifndef A
#define B
#endif
```

Currently, `B` will be defined although it shouldn't. This PR fixes that. 

## Solution

Move the branch responsible for `#define` lines into the last else branch, which is only evaluated if the current scope is accepting lines.
@bors bors bot changed the title Only execute #define if current scope is accepting lines [Merged by Bors] - Only execute #define if current scope is accepting lines Feb 24, 2023
@bors bors bot closed this Feb 24, 2023
ProfLander pushed a commit to shfty-rust/bevy that referenced this pull request Mar 19, 2023
…e#7798)

# Objective

While working on bevyengine#7784, I noticed that a `#define VAR` in a `.wgsl` file is always effective, even if it its scope is not accepting lines. 

Example:
```c
#define A
#ifndef A
#define B
#endif
```

Currently, `B` will be defined although it shouldn't. This PR fixes that. 

## Solution

Move the branch responsible for `#define` lines into the last else branch, which is only evaluated if the current scope is accepting lines.
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A-Rendering Drawing game state to the screen C-Bug An unexpected or incorrect behavior S-Ready-For-Final-Review This PR has been approved by the community. It's ready for a maintainer to consider merging it

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4 participants