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Contents
# 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
return errmsg(pr("break.errors.not_changed", expr: @match[2])) unless syntax_valid?(@match[2])
breakpoint.expr = @match[2]
end
end
end
Version data entries
6 entries across 6 versions & 4 rubygems