Ruby » Ruby master

Bug #19583

Updated by hurricup (Alexandr Evstigneev) over 1 year ago

This feels a bit inconsistent and I could not find an explanation. 

 This is fine and `-` has higher precedence than `.` 
 ``` 
 -2.upto 0 do |arg| 
 puts arg 
 end 
 ``` 

 But this is not working, won't even compile (requires parens): 
 ``` 
 var = 2 
 -var.upto 0 do |arg| 
 puts arg 
 end 
 ``` 

 I presume that in the first example there is no unary minus operation, just negative literal.  

 Ok, according to this - my assumption is correct. The question is - why? 
 ``` 
 def some 
   puts -2 
   a = 42 
   puts -a 
 end 

 puts RubyVM::InstructionSequence.of(method :some).disasm 
 ```

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