/
condition.rb
57 lines (43 loc) · 1.44 KB
/
condition.rb
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
# frozen_string_literal: true
require "byebug/command"
require "byebug/helpers/parse"
module Byebug
#
# Implements conditions on breakpoints.
#
# Adds the ability to stop on breakpoints only under certain conditions.
#
class ConditionCommand < Command
include Helpers::ParseHelper
self.allow_in_post_mortem = true
def self.regexp
/^\s* cond(?:ition)? (?:\s+(\d+)(?:\s+(.*))?)? \s*$/x
end
def self.description
<<-DESCRIPTION
cond[ition] <n>[ expr]
#{short_description}
Specify breakpoint number <n> to break only if <expr> is true. <n> is
an integer and <expr> is an expression to be evaluated whenever
breakpoint <n> is reached. If no expression is specified, the condition
is removed.
DESCRIPTION
end
def self.short_description
"Sets conditions on breakpoints"
end
def execute
return puts(help) unless @match[1]
breakpoints = Byebug.breakpoints.sort_by(&:id)
return errmsg(pr("condition.errors.no_breakpoints")) if breakpoints.empty?
pos, err = get_int(@match[1], "Condition", 1)
return errmsg(err) if err
breakpoint = breakpoints.find { |b| b.id == pos }
return errmsg(pr("break.errors.no_breakpoint")) unless breakpoint
unless syntax_valid?(@match[2])
return errmsg(pr("break.errors.not_changed", expr: @match[2]))
end
breakpoint.expr = @match[2]
end
end
end