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add __call metamethod support #256

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add __call metamethod support #256

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c9ac66b
add __call metamethod support
codehz Apr 9, 2024
b6dd215
simplify
codehz Apr 9, 2024
ab51833
remove unused
codehz Apr 9, 2024
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15 changes: 14 additions & 1 deletion lualib/nelua/analyzer.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -1318,6 +1318,15 @@ local function visitor_Call(context, node, argnodes, calleetype, calleesym, call
local attr = node.attr
if calleetype then
local sideeffect
local origintype = calleetype
if calleetype.is_record and calleetype.metafields.__call ~= nil then
calleetype = calleetype.metafields.__call.type
if not calleetype.is_procedure then
node:raisef("invalid metamethod __call in '%s'", calleetype)
end
attr.ismetacall = true
calleeobjnode = node[2]
end
if calleetype.is_procedure then -- function call
local argattrs = {}
for i=1,#argnodes do
Expand Down Expand Up @@ -1503,7 +1512,11 @@ local function visitor_Call(context, node, argnodes, calleetype, calleesym, call
end
end
end
attr.calleesym = calleesym
if attr.ismetacall then
attr.calleesym = calleetype.symbol
else
attr.calleesym = calleesym
end
if calleetype then
attr.type, attr.value = calleetype:get_return_type_and_value(1)
sideeffect = calleetype.sideeffect
Expand Down
6 changes: 5 additions & 1 deletion lualib/nelua/cgenerator.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -625,7 +625,11 @@ local function visitor_Call(context, node, emitter, argnodes, callee, calleeobjn
emitter:add_value(callee)
end
emitter:add_text('(')
emitter:add_converted_val(selftype, calleeobj, calleeobjtype)
if attr.ismetacall then
emitter:add_converted_val(selftype, node[2], calleeobjtype)
else
emitter:add_converted_val(selftype, calleeobj, calleeobjtype)
end
else
emitter:add_value(callee)
emitter:add_text('(')
Expand Down