[GHC] #2946: tracing should be controled by a global flag

[GHC]

#2946: tracing should be controled by a global flag
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    Reporter:  phercek           |        Owner:                  
        Type:  feature request   |       Status:  new             
    Priority:  normal            |    Milestone:  6.12 branch     
   Component:  GHCi              |      Version:  6.10.1          
    Severity:  minor             |   Resolution:                  
    Keywords:  debugger          |   Difficulty:  Unknown         
    Testcase:                    |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |  
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Changes (by phercek):

  * summary:  tracing should be controled by a global flag (it should not
              be resume context specific) => tracing should
              be controled by a global flag

Comment:

 As I discussed in message
 [http://permalink.gmane.org/gmane.comp.lang.haskell.glasgow.user/16270 my
 experience with ghci debugger extensions], the {{{:set trace}}} should
 have a grammar like this:[[BR]]
 {{{
  -- should everything be traced?
 :set trace (True|False)
 -- scopes which should be traced (or should not be traced when ! is
 present)
 :set trace ( (!)? scopeid )*
 -- add/remove individual scopeids to/from the trace specification
 :set trace (+|-) (!)? scopeid
 -- scopeid = ( conid . )* ( varid . )* varid | { breakPointArgs }
 }}}
 {{{scopeId}}} can be specified by its hierarchical identifier or by
 breakpoint arguments in curly braces.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2946#comment:5>
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