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'Expression is not an integer constant expression' fail to compile on Xcode 6 beta 3 about masonry HOT 4 CLOSED

snapkit commented on July 22, 2024

'Expression is not an integer constant expression' fail to compile on Xcode 6 beta 3

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Comments (4)

davdroman commented on July 22, 2024

Same here. I can't see the problem there either.

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erichoracek commented on July 22, 2024

The problem seems to be that the UILayoutPriority type that MASLayoutPrioritys are declared equal to are of type float. AFAIK, floats are not valid as the values of enum—there's a reason why Apple's declaring them as static const and not the same way as Masonry does. LLVM just seems to only now be enforcing this as of Xcode 6 Beta 3.

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erichoracek commented on July 22, 2024

So the solution would be:

typedef float MASLayoutPriority;
static const MASLayoutPriority MASLayoutPriorityRequired = UILayoutPriorityRequired;
static const MASLayoutPriority MASLayoutPriorityDefaultHigh = UILayoutPriorityDefaultHigh;
static const MASLayoutPriority MASLayoutPriorityDefaultMedium = 500;
static const MASLayoutPriority MASLayoutPriorityDefaultLow = UILayoutPriorityDefaultLow;
static const MASLayoutPriority MASLayoutPriorityFittingSizeLevel = UILayoutPriorityFittingSizeLevel;

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cloudkite commented on July 22, 2024

@eric-horacek thanks for looking into this!

In previous versions xcode5 & xcode6 beta 2 UILayoutPriority is declared as

enum {
    UILayoutPriorityRequired = 1000, // a required constraint.  Do not exceed this.
    UILayoutPriorityDefaultHigh = 750, // this is the priority level with which a button resists compressing its content.
    UILayoutPriorityDefaultLow = 250, // this is the priority level at which a button hugs its contents horizontally.  
    UILayoutPriorityFittingSizeLevel = 50, // When you send -[UIView systemLayoutSizeFittingSize:], the size fitting most closely to the target size (the argument) is computed.  UILayoutPriorityFittingSizeLevel is the priority level with which the view wants to conform to the target size in that computation.  It's quite low.  It is generally not appropriate to make a constraint at exactly this priority.  You want to be higher or lower.
};
typedef float UILayoutPriority;

so this seems like a very recent change in how apple declares non integer enums

If you have time could you submit a PR? 👍

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