Merge #11307 'Lua: vim.validate()'
Cette révision appartient à :
révision
0190de9aab
3
.luacov
3
.luacov
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@ -14,6 +14,9 @@ return {
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-- Relative (non-hidden) paths.
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'^[^/\\.]',
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},
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modules = {
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['vim'] = 'runtime/lua/vim/shared.lua'
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},
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}
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-- vim: ft=lua tw=80 sw=2 et
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@ -847,4 +847,63 @@ pesc({s}) *vim.pesc()*
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See also: ~
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https://github.com/rxi/lume
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validate({opt}) *vim.validate()*
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Validates a parameter specification (types and values).
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Usage example: >
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function user.new(name, age, hobbies)
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vim.validate{
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name={name, 'string'},
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age={age, 'number'},
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hobbies={hobbies, 'table'},
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}
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...
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end
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<
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Examples with explicit argument values (can be run directly): >
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vim.validate{arg1={{'foo'}, 'table'}, arg2={'foo', 'string'}}
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=> NOP (success)
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<
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>
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vim.validate{arg1={1, 'table'}}
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=> error('arg1: expected table, got number')
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<
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>
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vim.validate{arg1={3, function(a) return (a % 2) == 0 end, 'even number'}}
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=> error('arg1: expected even number, got 3')
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<
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Parameters: ~
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{opt} Map of parameter names to validations. Each key is
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a parameter name; each value is a tuple in one of
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these forms:
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1. (arg_value, type_name, optional)
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• arg_value: argument value
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• type_name: string type name, one of: ("table",
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"t", "string", "s", "number", "n", "boolean",
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"b", "function", "f", "nil", "thread",
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"userdata")
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• optional: (optional) boolean, if true, `nil`
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is valid
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2. (arg_value, fn, msg)
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• arg_value: argument value
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• fn: any function accepting one argument,
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returns true if and only if the argument is
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valid
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• msg: (optional) error string if validation
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fails
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is_callable({f}) *vim.is_callable()*
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Returns true if object `f` can be called as a function.
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Parameters: ~
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{f} Any object
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Return: ~
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true if `f` is callable, else false
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vim:tw=78:ts=8:ft=help:norl:
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@ -47,9 +47,7 @@ end)()
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--@param plain If `true` use `sep` literally (passed to String.find)
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--@returns Iterator over the split components
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function vim.gsplit(s, sep, plain)
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assert(type(s) == "string", string.format("Expected string, got %s", type(s)))
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assert(type(sep) == "string", string.format("Expected string, got %s", type(sep)))
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assert(type(plain) == "boolean" or type(plain) == "nil", string.format("Expected boolean or nil, got %s", type(plain)))
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vim.validate{s={s,'s'},sep={sep,'s'},plain={plain,'b',true}}
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local start = 1
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local done = false
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@ -106,7 +104,7 @@ end
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--@param value Value to compare
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--@returns true if `t` contains `value`
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function vim.tbl_contains(t, value)
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assert(type(t) == 'table', string.format("Expected table, got %s", type(t)))
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vim.validate{t={t,'t'}}
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for _,v in ipairs(t) do
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if v == value then
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@ -176,7 +174,7 @@ end
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--@param s String to trim
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--@returns String with whitespace removed from its beginning and end
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function vim.trim(s)
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assert(type(s) == 'string', string.format("Expected string, got %s", type(s)))
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vim.validate{s={s,'s'}}
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return s:match('^%s*(.*%S)') or ''
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end
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@ -186,8 +184,98 @@ end
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--@param s String to escape
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--@returns %-escaped pattern string
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function vim.pesc(s)
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assert(type(s) == 'string', string.format("Expected string, got %s", type(s)))
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vim.validate{s={s,'s'}}
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return s:gsub('[%(%)%.%%%+%-%*%?%[%]%^%$]', '%%%1')
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end
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--- Validates a parameter specification (types and values).
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---
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--- Usage example:
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--- <pre>
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--- function user.new(name, age, hobbies)
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--- vim.validate{
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--- name={name, 'string'},
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--- age={age, 'number'},
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--- hobbies={hobbies, 'table'},
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--- }
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--- ...
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--- end
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--- </pre>
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---
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--- Examples with explicit argument values (can be run directly):
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--- <pre>
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--- vim.validate{arg1={{'foo'}, 'table'}, arg2={'foo', 'string'}}
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--- => NOP (success)
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---
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--- vim.validate{arg1={1, 'table'}}
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--- => error('arg1: expected table, got number')
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---
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--- vim.validate{arg1={3, function(a) return (a % 2) == 0 end, 'even number'}}
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--- => error('arg1: expected even number, got 3')
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--- </pre>
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---
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--@param opt Map of parameter names to validations. Each key is a parameter
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--- name; each value is a tuple in one of these forms:
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--- 1. (arg_value, type_name, optional)
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--- - arg_value: argument value
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--- - type_name: string type name, one of: ("table", "t", "string",
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--- "s", "number", "n", "boolean", "b", "function", "f", "nil",
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--- "thread", "userdata")
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--- - optional: (optional) boolean, if true, `nil` is valid
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--- 2. (arg_value, fn, msg)
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--- - arg_value: argument value
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--- - fn: any function accepting one argument, returns true if and
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--- only if the argument is valid
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--- - msg: (optional) error string if validation fails
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function vim.validate(opt) end -- luacheck: no unused
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vim.validate = (function()
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local type_names = {
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t='table', s='string', n='number', b='boolean', f='function', c='callable',
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['table']='table', ['string']='string', ['number']='number',
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['boolean']='boolean', ['function']='function', ['callable']='callable',
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['nil']='nil', ['thread']='thread', ['userdata']='userdata',
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}
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local function _type_name(t)
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local tname = type_names[t]
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if tname == nil then
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error(string.format('invalid type name: %s', tostring(t)))
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end
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return tname
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end
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local function _is_type(val, t)
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return t == 'callable' and vim.is_callable(val) or type(val) == t
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end
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return function(opt)
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assert(type(opt) == 'table', string.format('opt: expected table, got %s', type(opt)))
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for param_name, spec in pairs(opt) do
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assert(type(spec) == 'table', string.format('%s: expected table, got %s', param_name, type(spec)))
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local val = spec[1] -- Argument value.
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local t = spec[2] -- Type name, or callable.
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local optional = (true == spec[3])
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if not vim.is_callable(t) then -- Check type name.
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if (not optional or val ~= nil) and not _is_type(val, _type_name(t)) then
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error(string.format("%s: expected %s, got %s", param_name, _type_name(t), type(val)))
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end
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elseif not t(val) then -- Check user-provided validation function.
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error(string.format("%s: expected %s, got %s", param_name, (spec[3] or '?'), val))
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end
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end
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return true
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end
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end)()
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--- Returns true if object `f` can be called as a function.
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---
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--@param f Any object
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--@return true if `f` is callable, else false
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function vim.is_callable(f)
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if type(f) == 'function' then return true end
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local m = getmetatable(f)
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if m == nil then return false end
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return type(m.__call) == 'function'
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end
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return vim
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@ -261,14 +261,14 @@ end
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-- vim.fn.{func}(...)
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local function fn_index(t, key)
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local function func(...)
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local function _fn_index(t, key)
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local function _fn(...)
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return vim.call(key, ...)
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end
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t[key] = func
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return func
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t[key] = _fn
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return _fn
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end
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local fn = setmetatable({}, {__index=fn_index})
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local fn = setmetatable({}, {__index=_fn_index})
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local module = {
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_update_package_paths = _update_package_paths,
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@ -230,12 +230,12 @@ describe('lua stdlib', function()
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end
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-- Validates args.
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eq(true, pcall(split, 'string', 'string', nil))
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eq('Error executing lua: .../shared.lua: Expected string, got number',
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pcall_err(split, 1, 'string', nil))
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eq('Error executing lua: .../shared.lua: Expected string, got number',
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pcall_err(split, 'string', 1, nil))
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eq('Error executing lua: .../shared.lua: Expected boolean or nil, got number',
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eq(true, pcall(split, 'string', 'string'))
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eq('Error executing lua: .../shared.lua: s: expected string, got number',
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pcall_err(split, 1, 'string'))
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eq('Error executing lua: .../shared.lua: sep: expected string, got number',
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pcall_err(split, 'string', 1))
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eq('Error executing lua: .../shared.lua: plain: expected boolean, got number',
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pcall_err(split, 'string', 'string', 1))
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end)
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@ -256,7 +256,7 @@ describe('lua stdlib', function()
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end
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-- Validates args.
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eq('Error executing lua: .../shared.lua: Expected string, got number',
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eq('Error executing lua: .../shared.lua: s: expected string, got number',
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pcall_err(trim, 2))
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end)
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@ -301,7 +301,7 @@ describe('lua stdlib', function()
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eq('foo%%%-bar', exec_lua([[return vim.pesc(vim.pesc('foo-bar'))]]))
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-- Validates args.
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eq("Error executing lua: .../shared.lua: Expected string, got number",
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eq('Error executing lua: .../shared.lua: s: expected string, got number',
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pcall_err(exec_lua, [[return vim.pesc(2)]]))
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end)
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@ -402,4 +402,79 @@ describe('lua stdlib', function()
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feed('<cr>')
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eq({3, NIL}, meths.get_var('yy'))
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end)
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it('vim.validate', function()
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exec_lua("vim.validate{arg1={{}, 'table' }}")
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exec_lua("vim.validate{arg1={{}, 't' }}")
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exec_lua("vim.validate{arg1={nil, 't', true }}")
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exec_lua("vim.validate{arg1={{ foo='foo' }, 't' }}")
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exec_lua("vim.validate{arg1={{ 'foo' }, 't' }}")
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exec_lua("vim.validate{arg1={'foo', 'string' }}")
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exec_lua("vim.validate{arg1={'foo', 's' }}")
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exec_lua("vim.validate{arg1={'', 's' }}")
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exec_lua("vim.validate{arg1={nil, 's', true }}")
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exec_lua("vim.validate{arg1={1, 'number' }}")
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exec_lua("vim.validate{arg1={1, 'n' }}")
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exec_lua("vim.validate{arg1={0, 'n' }}")
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exec_lua("vim.validate{arg1={0.1, 'n' }}")
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exec_lua("vim.validate{arg1={nil, 'n', true }}")
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exec_lua("vim.validate{arg1={true, 'boolean' }}")
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exec_lua("vim.validate{arg1={true, 'b' }}")
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exec_lua("vim.validate{arg1={false, 'b' }}")
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exec_lua("vim.validate{arg1={nil, 'b', true }}")
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exec_lua("vim.validate{arg1={function()end, 'function' }}")
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exec_lua("vim.validate{arg1={function()end, 'f' }}")
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exec_lua("vim.validate{arg1={nil, 'f', true }}")
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exec_lua("vim.validate{arg1={nil, 'nil' }}")
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exec_lua("vim.validate{arg1={nil, 'nil', true }}")
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exec_lua("vim.validate{arg1={coroutine.create(function()end), 'thread' }}")
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exec_lua("vim.validate{arg1={nil, 'thread', true }}")
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exec_lua("vim.validate{arg1={{}, 't' }, arg2={ 'foo', 's' }}")
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exec_lua("vim.validate{arg1={2, function(a) return (a % 2) == 0 end, 'even number' }}")
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eq("Error executing lua: .../shared.lua: 1: expected table, got number",
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pcall_err(exec_lua, "vim.validate{ 1, 'x' }"))
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eq("Error executing lua: .../shared.lua: invalid type name: x",
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pcall_err(exec_lua, "vim.validate{ arg1={ 1, 'x' }}"))
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eq("Error executing lua: .../shared.lua: invalid type name: 1",
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pcall_err(exec_lua, "vim.validate{ arg1={ 1, 1 }}"))
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eq("Error executing lua: .../shared.lua: invalid type name: nil",
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pcall_err(exec_lua, "vim.validate{ arg1={ 1 }}"))
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-- Validated parameters are required by default.
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eq("Error executing lua: .../shared.lua: arg1: expected string, got nil",
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pcall_err(exec_lua, "vim.validate{ arg1={ nil, 's' }}"))
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-- Explicitly required.
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eq("Error executing lua: .../shared.lua: arg1: expected string, got nil",
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pcall_err(exec_lua, "vim.validate{ arg1={ nil, 's', false }}"))
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eq("Error executing lua: .../shared.lua: arg1: expected table, got number",
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pcall_err(exec_lua, "vim.validate{arg1={1, 't'}}"))
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eq("Error executing lua: .../shared.lua: arg2: expected string, got number",
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pcall_err(exec_lua, "vim.validate{arg1={{}, 't'}, arg2={1, 's'}}"))
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eq("Error executing lua: .../shared.lua: arg2: expected string, got nil",
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pcall_err(exec_lua, "vim.validate{arg1={{}, 't'}, arg2={nil, 's'}}"))
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eq("Error executing lua: .../shared.lua: arg2: expected string, got nil",
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pcall_err(exec_lua, "vim.validate{arg1={{}, 't'}, arg2={nil, 's'}}"))
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eq("Error executing lua: .../shared.lua: arg1: expected even number, got 3",
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pcall_err(exec_lua, "vim.validate{arg1={3, function(a) return a == 1 end, 'even number'}}"))
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eq("Error executing lua: .../shared.lua: arg1: expected ?, got 3",
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pcall_err(exec_lua, "vim.validate{arg1={3, function(a) return a == 1 end}}"))
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end)
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it('vim.is_callable', function()
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eq(true, exec_lua("return vim.is_callable(function()end)"))
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eq(true, exec_lua([[
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local meta = { __call = function()end }
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local function new_callable()
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return setmetatable({}, meta)
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end
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local callable = new_callable()
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return vim.is_callable(callable)
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]]))
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eq(false, exec_lua("return vim.is_callable(1)"))
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eq(false, exec_lua("return vim.is_callable('foo')"))
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eq(false, exec_lua("return vim.is_callable({})"))
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end)
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end)
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