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local mapargs = require 'mapargs'
local inspect = require 'inspect'
function tabfunc(...)
local a = mapargs({'a1', 'a2', 'a3'}, ...)
print(inspect(a))
end
print('----------')
print('f(10, 20, 30)')
tabfunc(10, 20, 30)
print('f(10, nil, 30)')
tabfunc(10, nil, 30)
print('f{10, 20, 30}')
tabfunc{10, 20, 30}
print('f{10, nil, 30}')
tabfunc{10, nil, 30}
print('f{a3=300, a1=100}')
tabfunc{a3=300, a1=100}
print('f{1, a3=3}')
tabfunc{1, a3=3}
print('f{a3=3, 1}')
tabfunc{a3=3, 1}
print('----------')
if false then
-- the code below was used to explore ideas that became mapargs()
mixed = { '[1]', nil, '[3]', abc='[abc]', '[3]', def='[def]' }
local function showtable(desc, t)
print(string.format('%s (len %s)\n%s', desc, #t, inspect(t)))
end
showtable('mixed', mixed)
print('ipairs(mixed)')
for k, v in ipairs(mixed) do
print(string.format('[%s] = %s', k, tostring(v)))
end
print('table.pack(mixed)')
print(inspect(table.pack(mixed)))
local function nilarg(desc, a, b, c)
print(desc)
print('a = ' .. tostring(a))
print('b = ' .. tostring(b))
print('c = ' .. tostring(c))
end
nilarg('nilarg(1)', 1)
nilarg('nilarg(1, nil, 3)', 1, nil, 3)
local function nilargs(desc, ...)
args = table.pack(...)
showtable(desc, args)
end
nilargs('nilargs{a=1, b=2, c=3}', {a=1, b=2, c=3})
nilargs('nilargs(1, 2, 3)', 1, 2, 3)
nilargs('nilargs(1, nil, 3)', 1, nil, 3)
nilargs('nilargs{1, 2, 3}', {1, 2, 3})
nilargs('nilargs{1, nil, 3}', {1, nil, 3})
print('table.unpack({1, nil, 3})')
a, b, c = table.unpack({1, nil, 3})
print('a = ' .. tostring(a))
print('b = ' .. tostring(b))
print('c = ' .. tostring(c))
end
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