Module: Musa::Neumalang::Neumalang::Parser::DurationCalculation Private

Included in:
AbsDurationAttribute, DeltaDurationAttribute
Defined in:
lib/musa-dsl/neumalang/neumalang.rb

Overview

This module is part of a private API. You should avoid using this module if possible, as it may be removed or be changed in the future.

Helper module for duration calculations.

Calculates duration from notation including dots and slashes. Supports: _2 (double), _/2 (half), _. (dotted), _.. (double dotted).

Instance Method Summary collapse

Instance Method Details

#duration ⇒ Rational

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Calculates duration value.

Returns:



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# File 'lib/musa-dsl/neumalang/neumalang.rb', line 704

def duration
  base = capture(:number)&.value

  slashes = capture(:slashes)&.value || 0
  base ||= Rational(1, 2**slashes.to_r)

  dots_extension = 0
  capture(:mid_dots)&.value&.times do |i|
    dots_extension += Rational(base, 2**(i+1))
  end

  base + dots_extension
end