Project

General

Profile

Bug #16506

Updated by sawa (Tsuyoshi Sawada) 3 months ago

https://ruby-doc.org/core-2.7.0/Module.html#method-i-const_source_location says: 

 > Returns the Ruby source filename and line number containing **first** definition of constant specified. 

 It should be: 

 > Returns the Ruby source filename and line number containing the **last** definition (the effective definition) of the constant specified. 

 It also has an example line: 

 ```ruby 
 p Object.const_source_location('A')         # => ["test.rb", 1]    -- note it is first entry, not "continuation" 
 ``` 

 but that may give the impression that the first-ness is due to the nature of this method. The reason `["test.rb", 1]` is returned instead of `["test.rb", 14]` is because the constant is created at line 1, and is only reopened/modified in line 14. Perhaps, this line can be changed to: 


 ```ruby 
 p Object.const_source_location('A')         # => ["test.rb", 1]    -- note 'A' is created in line 1, and is only reopened/modified in "continuation" 
 ``` 

 Adding something like this may make it clear that it is the last definition that is returned: 

 ```ruby 
 D = 'D1' 
 D = 'D2' 
 D = 'D3' 

 ... 

 Object.const_source_location('D') # => returns the location that corresponds to 'D3'

Back