From: "mame (Yusuke Endoh)" <mame@...>
Date: 2012-11-20T21:20:31+09:00
Subject: [ruby-core:49697] [ruby-trunk - Feature #3163] SyntaxError when using variable which is also a method in current scope with a Symbol argument


Issue #3163 has been updated by mame (Yusuke Endoh).

Description updated
Target version set to next minor


----------------------------------------
Feature #3163: SyntaxError when using variable which is also a method in current scope with a Symbol argument
https://bugs.ruby-lang.org/issues/3163#change-33219

Author: Eregon (Benoit Daloze)
Status: Assigned
Priority: Low
Assignee: matz (Yukihiro Matsumoto)
Category: 
Target version: next minor


=begin
 Hi,
 Here is a simple example:
 
 irb for ruby-1.9.2-r27362
 > print = 0
 > print :symbol
 SyntaxError: (irb):2: syntax error, unexpected ':', expecting $end
 print :symbol
        ^
 	from .../bin/irb:17:in `<main>'
 
 Why does this generate a SyntaxError ?
 It doesn't if you use parentheses of courses: print(:symbol)
 
 But it shouldn't fail as long as these methods are not keywords.
 This mean that *any* method which in current scope is also a variable,
 and accept a symbol as argument (else you would not call it with a symbol), cause this issue:
 
 def render(*args)
   puts "in render"
 end
 render = 1
 render :a
 SyntaxError: (irb):5: syntax error, unexpected ':', expecting $end
 render :a
         ^
 and this cause it too:
 render :a => "b"
 SyntaxError:...
 (and "method param: value" does not works either)
 
 I ran a few times in this bug, while using some "p :done"(and having a local var p) to trace the program execution quickly.
 
 Sorry if this has already been reported, but I didn't see.
 I think the use of "method :symbol" or "method" is high, so this can be really frustrating to need to use parentheses.
=end



-- 
http://bugs.ruby-lang.org/