diff options
Diffstat (limited to 'lib/irb/statement.rb')
-rw-r--r-- | lib/irb/statement.rb | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/lib/irb/statement.rb b/lib/irb/statement.rb new file mode 100644 index 0000000000..9493c3ffb1 --- /dev/null +++ b/lib/irb/statement.rb @@ -0,0 +1,78 @@ +# frozen_string_literal: true + +module IRB + class Statement + attr_reader :code + + def is_assignment? + raise NotImplementedError + end + + def suppresses_echo? + raise NotImplementedError + end + + def should_be_handled_by_debugger? + raise NotImplementedError + end + + def evaluable_code + raise NotImplementedError + end + + class Expression < Statement + def initialize(code, is_assignment) + @code = code + @is_assignment = is_assignment + end + + def suppresses_echo? + @code.match?(/;\s*\z/) + end + + def should_be_handled_by_debugger? + true + end + + def is_assignment? + @is_assignment + end + + def evaluable_code + @code + end + end + + class Command < Statement + def initialize(code, command, arg, command_class) + @code = code + @command = command + @arg = arg + @command_class = command_class + end + + def is_assignment? + false + end + + def suppresses_echo? + false + end + + def should_be_handled_by_debugger? + IRB::ExtendCommand::DebugCommand > @command_class + end + + def evaluable_code + # Hook command-specific transformation to return valid Ruby code + if @command_class.respond_to?(:transform_args) + arg = @command_class.transform_args(@arg) + else + arg = @arg + end + + [@command, arg].compact.join(' ') + end + end + end +end |