Ruby

Bug #21186

Updated by qnighy (Masaki Hara) 18 days ago

`?あand 0` has inconsistent behavior between Prism and parse.y. 

 ```console 
 % ./miniruby --parser=parse.y -e "?aand 0" 
 -e:1: syntax error, unexpected '?' 
 ?aand 0 
 ./miniruby: compile error (SyntaxError) 

 % ./miniruby --parser=parse.y -e "?あand 0" 

 % ./miniruby --parser=prism -e "?aand 0" 
 -e: -e:1: syntax error found (SyntaxError) 
 > 1 | ?aand 0 
     | ^ unexpected '?', ignoring it 


 % ./miniruby --parser=prism -e "?あand 0" 
 -e: -e:1: syntax error found (SyntaxError) 
 > 1 | ?あand 0 
     | ^ unexpected '?', ignoring it 

 % ./miniruby --parser=parse.y -e "?\caand 0" 

 % ./miniruby --parser=prism -e "?\caand 0" 

 
 ``` 

 |                         |parse.y|Prism| 
 |------------|-------|-----| |----------|-------|-----| 
 |`?aand 0`     |     x     |    x    | 
 |`?あand 0`    | 0`|         |    x    | 
 |`?\caand 0` |         |       | 

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