rfc:match_expression

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rfc:match_expression [2020/04/25 08:09] – Add switch expression to failed reason ilijatovilorfc:match_expression [2020/04/25 10:03] – Adjust adt syntax ilijatovilo
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 </code> </code>
  
-This introduces an ambiguity with the ''+'' and ''-'' prefix operators.+This introduces an ambiguity with the ''+'' and ''-'' unary operators.
  
 <code php> <code php>
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 </code> </code>
  
-The keyword ''match'' could be a bit misleading here. Because I have no strong opinion on this it will be moved to a secondary vote.+The keyword ''match'' could be a bit misleading here. A potential gotcha is passing truthy values to the match which will not work as intended. But of course this issue remains regardless of dropping ''(true)'' or not. 
 + 
 +<code php> 
 +match { 
 +    preg_match(...) => {}, // preg_match returns 1 which is NOT identical (===) to true 
 +} 
 +</code> 
 + 
 +Because I have no strong opinion on this it will be moved to a secondary vote.
  
 ===== Miscellaneous ===== ===== Miscellaneous =====
 ==== Arbitrary expressions ==== ==== Arbitrary expressions ====
-A match condition can be any arbitrary expression. Analogous to ''switch'' each condition will be checked from top to bottom until the first one matches. If a condition matches the remaining conditions won't be evaluated+A match condition can be any arbitrary expression. Analogous to ''switch'' each condition will be checked from top to bottom until the first one matches. If a condition matches the remaining conditions won't be evaluated.
  
 <code php> <code php>
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     // Algebraic data types if we ever get them     // Algebraic data types if we ever get them
-    let Ast\BinaryExpr($lhs, '+', $rhs) => ...,+    let Ast::BinaryExpr($lhs, '+', $rhs) => ...,
 } }
  
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 ==== If you voted no, why? ==== ==== If you voted no, why? ====
  
-  1. Not interested +  - Not interested 
-  2. I don't want blocks +  - I don't want blocks 
-  3. Missing return values in blocks +  - Missing return values in blocks 
-  4. Missing pattern matching +  - Missing pattern matching 
-  5. Missing explicit fallthrough +  - Missing explicit fallthrough 
-  6. BC break is not acceptable +  - BC break is not acceptable 
-  7. Wanted [[https://wiki.php.net/rfc/switch_expression|switch expressions]] instead +  - Wanted [[https://wiki.php.net/rfc/switch_expression|switch expressions]] instead 
-  8. Other+  - Other
  
 <doodle title="If you voted no, why?" auth="ilijatovilo" voteType="multi" closed="true"> <doodle title="If you voted no, why?" auth="ilijatovilo" voteType="multi" closed="true">
rfc/match_expression.txt · Last modified: 2020/05/09 15:59 by ilijatovilo

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