class Byebug::TracevarCommand
Show (and possibily stop) at every line that changes a global variable.
Public Class Methods
description()
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# File lib/byebug/commands/tracevar.rb, line 15 def self.description <<-DESCRIPTION tr[acevar] <variable> [[no]stop] #{short_description} If "stop" is specified, execution will stop every time the variable changes its value. If nothing or "nostop" is specified, execution won't stop, changes will just be logged in byebug's output. DESCRIPTION end
regexp()
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# File lib/byebug/commands/tracevar.rb, line 9 def self.regexp /^\s* tr(?:acevar)? (?: \s+ (\S+))? # (variable-name)? (?: \s+ (stop|nostop))? \s*$/x end
short_description()
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# File lib/byebug/commands/tracevar.rb, line 27 def self.short_description "Enables tracing of a global variable" end
Public Instance Methods
execute()
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# File lib/byebug/commands/tracevar.rb, line 31 def execute var = @match[1] return errmsg(pr("trace.errors.needs_global_variable")) unless var return errmsg(pr("trace.errors.var_is_not_global", name: var)) unless global_variables.include?(:"#{var}") stop = @match[2] && @match[2] !~ /nostop/ instance_eval do trace_var(:"#{var}") { |val| on_change(var, val, stop) } end puts pr("trace.messages.success", var: var) end
Private Instance Methods
on_change(name, value, stop)
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# File lib/byebug/commands/tracevar.rb, line 47 def on_change(name, value, stop) puts pr("trace.messages.on_change", name: name, value: value) context.step_out(1, false) if stop end