Class: Byebug::CatchCommand

Inherits:
Command
  • Object
show all
Defined in:
lib/byebug/commands/catch.rb

Overview

Implements exception catching.

Enables the user to catch unhandled assertion when they happen.

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Command

commands, find, format_subcmd, format_subcmds, help, inherited, #initialize, #match

Methods included from StringFunctions

#camelize, #prettify

Methods included from FileFunctions

#get_line, #get_lines, #n_lines, #normalize

Methods included from ParseFunctions

#get_int, #parse_steps, #syntax_valid?

Constructor Details

This class inherits a constructor from Byebug::Command

Class Method Details

.descriptionObject


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# File 'lib/byebug/commands/catch.rb', line 52

def description
  prettify <<-EOD
    cat[ch][ (off|<exception>[ off])]

    "catch" lists catchpoints.
    "catch off" deletes all catchpoints.
    "catch <exception>" enables handling <exception>.
    "catch <exception> off" disables handling <exception>.
  EOD
end

.namesObject


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# File 'lib/byebug/commands/catch.rb', line 48

def names
  %w(catch)
end

Instance Method Details

#executeObject


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# File 'lib/byebug/commands/catch.rb', line 16

def execute
  ex = @match[1]
  return info_catch unless ex

  cmd = @match[2]
  unless cmd
    if 'off' == ex
      Byebug.catchpoints.clear if
        confirm(pr('catch.confirmations.delete_all'))

      return
    end

    is_class = bb_eval("#{ex.is_a?(Class)}")
    puts pr('catch.errors.not_class', class: ex) unless is_class

    Byebug.add_catchpoint(ex)
    return puts pr('catch.catching', exception: ex)
  end

  if cmd == 'off'
    exists = Byebug.catchpoints.member?(ex)
    return errmsg pr('catch.errors.not_found', exception: ex) unless exists

    Byebug.catchpoints.delete(ex)
    return errmsg pr('catch.errors.removed', exception: ex)
  end

  errmsg pr('catch.errors.off', off: cmd)
end

#regexpObject


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# File 'lib/byebug/commands/catch.rb', line 12

def regexp
  /^\s* cat(?:ch)? (?:\s+(\S+))? (?:\s+(off))? \s*$/x
end