Class: Byebug::ConditionCommand

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

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Command

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

Constructor Details

This class inherits a constructor from Byebug::Command

Class Method Details

.description ⇒ Object 



35
36
37
38
39
40
41
42
 
# File 'lib/byebug/commands/condition.rb', line 35

def description
  %{cond[ition] nnn[ expr]

    Specify breakpoint number nnn to break only if expr is true. nnn is an
    integer and expr is an expression to be evaluated whenever breakpoint
    nnn is reached. If no expression is specified, the condition is
    removed.}
end

.names ⇒ Object 



31
32
33
 
# File 'lib/byebug/commands/condition.rb', line 31

def names
  %w(condition)
end

Instance Method Details

#execute ⇒ Object 



9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
# File 'lib/byebug/commands/condition.rb', line 9

def execute
  return print ConditionCommand.help(nil) unless @match[1]

  breakpoints = Byebug.breakpoints.sort_by { |b| b.id }
  largest = breakpoints.inject(0) do |tally, b|
    tally = b.id if b.id > tally
  end

  return errmsg "No breakpoints have been set\n" if 0 == largest
  return unless pos = get_int(@match[1], "Condition", 1, largest)

  breakpoint = breakpoints.select { |b| b.id == pos }.first

  if syntax_valid?(@match[2])
    breakpoint.expr = @match[2]
  else
    return errmsg "Incorrect expression \"#{@match[2]}\", " \
                  "breakpoint not changed\n"
  end
end

#regexp ⇒ Object 



5
6
7
 
# File 'lib/byebug/commands/condition.rb', line 5

def regexp
  /^\s* cond(?:ition)? (?:\s+(\d+)(?:\s+(.*))?)? \s*$/x
end