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dearblue
c14e26d79e
If the `Errno::EXXX` class is defined minimally when needed, it will save about 17 KiB of RAM in a 32-bit environment.
Define the singular methods `.const_defined?`, `.const_missing` and `.constants` in the `Errno` module and act as if there are classes that have not yet been defined.
However, if real classes are enumerated, for example by the following code, the effect is lost.
```ruby
Errno.constants.map { |id| Errno.const_get(id) }
```
But I believe that such codes are rarely written with the intention of being written.
In this patch, the `Errno::EXXX#initialize` method is no longer defined for further memory reduction.
Instead, it has been merged into the `SystemCallError#initialize` method.
16 lines
309 B
Ruby
16 lines
309 B
Ruby
module Errno
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def Errno.const_defined?(name)
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__errno_defined?(name) or super
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end
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def Errno.const_missing(name)
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__errno_define(name) or super
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end
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# Module#constants is defined in mruby-metaprog
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# So, it's may be raised NoMethodError
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def Errno.constants
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__errno_list(super)
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end
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end
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