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lua: add tbl_deep_extend (#11969)

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This commit is contained in:
Hirokazu Hata
2020-05-18 02:24:34 +09:00
committed by GitHub
parent 090d3c2813
commit ae5bd0454e
2 changed files with 129 additions and 11 deletions
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41
runtime/lua/vim/shared.lua
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@@ -200,16 +200,7 @@ function vim.tbl_isempty(t)
return next(t) == nil
end
--- Merges two or more map-like tables.
---
--@see |extend()|
---
--@param behavior Decides what to do if a key is found in more than one map:
--- - "error": raise an error
--- - "keep": use value from the leftmost map
--- - "force": use value from the rightmost map
--@param ... Two or more map-like tables.
function vim.tbl_extend(behavior, ...)
local function tbl_extend(behavior, deep_extend, ...)
if (behavior ~= 'error' and behavior ~= 'keep' and behavior ~= 'force') then
error('invalid "behavior": '..tostring(behavior))
end
@@ -228,7 +219,9 @@ function vim.tbl_extend(behavior, ...)
vim.validate{["after the second argument"] = {tbl,'t'}}
if tbl then
for k, v in pairs(tbl) do
if behavior ~= 'force' and ret[k] ~= nil then
if type(v) == 'table' and deep_extend and not vim.tbl_islist(v) then
ret[k] = tbl_extend(behavior, true, ret[k] or vim.empty_dict(), v)
elseif behavior ~= 'force' and ret[k] ~= nil then
if behavior == 'error' then
error('key found in more than one map: '..k)
end -- Else behavior is "keep".
@@ -241,6 +234,32 @@ function vim.tbl_extend(behavior, ...)
return ret
end
--- Merges two or more map-like tables.
---
--@see |extend()|
---
--@param behavior Decides what to do if a key is found in more than one map:
--- - "error": raise an error
--- - "keep": use value from the leftmost map
--- - "force": use value from the rightmost map
--@param ... Two or more map-like tables.
function vim.tbl_extend(behavior, ...)
return tbl_extend(behavior, false, ...)
end
--- Merges recursively two or more map-like tables.
---
--@see |tbl_extend()|
---
--@param behavior Decides what to do if a key is found in more than one map:
--- - "error": raise an error
--- - "keep": use value from the leftmost map
--- - "force": use value from the rightmost map
--@param ... Two or more map-like tables.
function vim.tbl_deep_extend(behavior, ...)
return tbl_extend(behavior, true, ...)
end
--- Deep compare values for equality
function vim.deep_equal(a, b)
if a == b then return true end