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Allow adding overload to overload

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This commit is contained in:
Étienne Fildadut 2024-01-07 18:22:55 +01:00
parent f198286870
commit 67c952bc21
3 changed files with 14 additions and 8 deletions
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6
anselme/ast/Definition.lua
View file

@ -1,5 +1,5 @@
local ast = require("anselme.ast")
local Nil, Overloadable
local Nil, Overloadable, Overload
local operator_priority = require("anselme.common").operator_priority
@ -30,7 +30,7 @@ local Definition = ast.abstract.Node {
local symbol = self.symbol:eval(state)
local val = self.expression:eval(state)
if Overloadable:issub(val) then
if Overloadable:issub(val) or Overload:is(val) then
state.scope:define_overloadable(symbol, val)
else
state.scope:define(symbol, val)
@ -41,6 +41,6 @@ local Definition = ast.abstract.Node {
}
package.loaded[...] = Definition
Nil, Overloadable = ast.Nil, ast.abstract.Overloadable
Nil, Overloadable, Overload = ast.Nil, ast.abstract.Overloadable, ast.Overload
return Definition

2
anselme/ast/Environment.lua
View file

@ -123,7 +123,7 @@ local Environment = ast.abstract.Runtime {
end,
-- define or redefine new overloadable variable in current environment, inheriting existing overload variants from (parent) scopes
define_overloadable = function(self, state, symbol, exp)
assert(Overloadable:issub(exp), "trying to add an non-overloadable value to an overload")
assert(Overloadable:issub(exp) or Overload:is(exp), "trying to add an non-overloadable value to an overload")
local identifier = symbol:to_identifier()

14
anselme/ast/Overload.lua
View file

@ -17,9 +17,15 @@ Overload = ast.abstract.Node {
end
end,
insert = function(self, val) -- only for construction
assert0(not self._signatures[val:hash_signature()], ("a function with parameters %s is already defined in the overload"):format(val:format_signature()))
table.insert(self.list, val)
self._signatures[val:hash_signature()] = true
if Overload:is(val) then
for _, overloadable in ipairs(val.list) do
self:insert(overloadable)
end
else
assert0(not self._signatures[val:hash_signature()], ("a function with parameters %s is already defined in the overload"):format(val:format_signature()))
table.insert(self.list, val)
self._signatures[val:hash_signature()] = true
end
end,
_format = function(self, ...)
@ -61,7 +67,7 @@ Overload = ast.abstract.Node {
if success then
return success, args
else
return nil, ("no function match arguments %s, possible functions were:\n\t• %s"):format(args:format(state), table.concat(failure, "\n\t• "))
return nil, ("no function match arguments %s, possible functions were:\n\t• %s"):format(args:format_short(state), table.concat(failure, "\n\t• "))
end
end
}