Class: Lisp::Format::Directives::Indirection

Inherits:
Directive show all
Defined in:
lib/carat/lisp-format.rb

Overview

Represents the ~? (Indirection) directive. This takes the two following arguments and formats them, using the first as the formatting string, and the second as its arguments and inserts it into the output.

Instance Attribute Summary

Attributes inherited from Directive

#pos

Instance Method Summary collapse

Methods inherited from Directive

#initialize, #join

Constructor Details

This class inherits a constructor from Lisp::Format::Directives::Directive

Instance Method Details

#execute(state) ⇒ Object

Uses the next argument as a formatting string and then, depending on modifiers specified, uses one of a set of different arguments as input to this formatting. The full form is

~@?

with the following interpretations

@

the formatting string is, much like a macro, inserted into the formatting stream, so to speak, and consumes arguments and so on from the current state, instead, as per default, consuming a second argument and reading arguments from it.



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# File 'lib/carat/lisp-format.rb', line 1420

def execute(state)
  if at_mod?
    formatter = Formatter.new(state.next_arg, state)
  else
    format = state.next_arg
    state = State.new(state.next_arg, state.latest_output)
    formatter = Formatter.new(format, state)
  end
  formatter.run
end