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https://github.com/neovim/neovim
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bba75eb184
This is where "pure functions" can live, which can be shared by Nvim and test logic which may not have a running Nvim instance available. If in the future we use Nvim itself as the Lua engine for tests, then these functions could be moved directly onto the `vim` Lua module. closes #6580
40 lines
1006 B
Lua
40 lines
1006 B
Lua
--- Shared functions
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-- - Used by Nvim and tests
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-- - Can run in vanilla Lua (do not require a running instance of Nvim)
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--- Merge map-like tables.
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--
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--@see |extend()|
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--
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-- behavior: Decides what to do if a key is found in more than one map:
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-- "error": raise an error
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-- "keep": skip
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-- "force": set the item again
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local function tbl_extend(behavior, ...)
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if (behavior ~= 'error' and behavior ~= 'keep' and behavior ~= 'force') then
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error('invalid "behavior": '..tostring(behavior))
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end
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local ret = {}
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for i = 1, select('#', ...) do
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local tbl = select(i, ...)
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if tbl then
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for k, v in pairs(tbl) do
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if behavior ~= 'force' and ret[k] ~= nil then
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if behavior == 'error' then
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error('key found in more than one map: '..k)
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end -- Else behavior is "keep".
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else
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ret[k] = v
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end
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end
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end
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end
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return ret
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end
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local module = {
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tbl_extend = tbl_extend,
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}
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return module
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