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Update syntax-if-statements-initializers.md

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`where` ~> `in`
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aaron 2024-05-07 14:07:51 -07:00 • committed by GitHub
parent 548d4c8ba9
commit 544f99eed6
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GPG key ID: B5690EEEBB952194
1 changed files with 9 additions and 9 deletions
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18
docs/syntax-if-statements-initializers.md
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@ -40,7 +40,7 @@ end
```lua ```lua
function PlayerControl:GetEntities() function PlayerControl:GetEntities()
if self.RemovedSelf then if self.RemovedSelf then
elseif local entity = self:TryGetEntity() where entity == nil then elseif local entity = self:TryGetEntity() in entity == nil then
elseif local index = table.find(self.Instances, entity.Root) then elseif local index = table.find(self.Instances, entity.Root) then
table.remove(self.Instances, index) table.remove(self.Instances, index)
self.RemovedSelf = true self.RemovedSelf = true
@ -62,8 +62,8 @@ If statements with initializers must match the below grammar. The variables decl
+ 'if' cond 'then' block {'elseif' cond 'then' block} ['else' block] 'end' | + 'if' cond 'then' block {'elseif' cond 'then' block} ['else' block] 'end' |
'for' binding '=' exp ',' exp [',' exp] 'do' block 'end' | 'for' binding '=' exp ',' exp [',' exp] 'do' block 'end' |
... ...
+ cond = 'local' binding '=' exp ['where' exp] | + cond = 'local' binding '=' exp ['in' exp] |
+ 'local' bindinglist '=' explist 'where' exp | + 'local' bindinglist '=' explist 'in' exp |
+ exp + exp
``` ```
@ -94,7 +94,7 @@ local function foo()
return true return true
end end
if local b = foo() where b == false then if local b = foo() in b == false then
print(b, "truthy block") print(b, "truthy block")
else else
print(b, "falsy block") print(b, "falsy block")
@ -103,7 +103,7 @@ end
`Output: true falsy block` `Output: true falsy block`
When declaring multiple values inside of an initializer, the `where` clause is required. When declaring multiple values inside of an initializer, the `in` clause is required.
Example: Example:
@ -112,7 +112,7 @@ local function foo()
return true, false return true, false
end end
if local a,b = foo() where a and b then if local a, b = foo() in a and b then
else else
print'Hello World, from Luau!' print'Hello World, from Luau!'
end end
@ -148,12 +148,12 @@ Initializers increase the complexity of the language syntax and may obscure cont
# Alternatives # Alternatives
A different keyword or token can be used in place of `where`. A different keyword or token can be used in place of `in`.
Introducing a new contextual keyword can introduce complexity in the parser, and a different existing keyword like `in` or `do` could be used instead. Rather than use `in`, we could introduce a new contextual keyword, or use a different existing keyword like `do`.
```lua ```lua
if local a, b = foo() in b > a then if local a, b = foo() do b > a then
print'Hello World, from Luau!' print'Hello World, from Luau!'
end end
``` ```