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util/bitcompat.lua @ 12254:5b0c8e499288
modulemanager: Add plugin load filter that reads module metadata from source
Metadata in modules is added using lines formatted as:
--% key: value
Where key is a valid identifier string, and value is also a string (leading
and trailing whitespace are trimmed during parsing).
The initial supported keys are:
--% requires_core_features: feature1, feature2, ...
--% conflicts_core_features: feature1, feature2. ...
These 'features' map to features reported by the new core.features module.
A benefit of this load-time metadata approach compared to e.g. something like
module:requires()/module:conflicts() is that we can continue to look in module
search paths for a suitable module. Aborting an already-loaded module due to
a version conflict would be too late.
author | Matthew Wild <mwild1@gmail.com> |
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date | Fri, 04 Feb 2022 14:20:00 +0000 |
parent | 10241:48f7cda4174d |
child | 12573:0f4feaf9ca64 |
rev | line source |
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10241
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
diff
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1 -- Compatibility layer for bitwise operations |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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2 |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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3 -- First try the bit32 lib |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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4 -- Lua 5.3 has it with compat enabled |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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5 -- Lua 5.2 has it by default |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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6 if _G.bit32 then |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
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7 return _G.bit32; |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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8 else |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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9 -- Lua 5.1 may have it as a standalone module that can be installed |
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Kim Alvefur <zash@zash.se>
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10 local ok, bitop = pcall(require, "bit32") |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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11 if ok then |
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12 return bitop; |
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Kim Alvefur <zash@zash.se>
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13 end |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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14 end |
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Kim Alvefur <zash@zash.se>
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15 |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
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16 do |
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17 -- Lua 5.3 and 5.4 would be able to use native infix operators |
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18 local ok, bitop = pcall(require, "util.bit53") |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
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19 if ok then |
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20 return bitop; |
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21 end |
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22 end |
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23 |
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24 do |
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25 -- Lastly, try the LuaJIT bitop library |
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26 local ok, bitop = pcall(require, "bit") |
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27 if ok then |
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28 return bitop; |
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29 end |
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parents:
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30 end |
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31 |
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32 error "No bit module found. See https://prosody.im/doc/depends#bitop"; |