Module: Fbe::Award::PTerm

Defined in:
lib/fbe/award.rb

Overview

A term for bylaw.

Instance Method Summary collapse

Instance Method Details

#abstract? ⇒ Boolean

Returns:

  • (Boolean) 


209
210
211
 
# File 'lib/fbe/award.rb', line 209

def abstract?
  false
end

#publish_to(bylaw) ⇒ Object 



213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
 
# File 'lib/fbe/award.rb', line 213

def publish_to(bylaw)
  case @op
  when :award
    @operands.each do |o|
      o.publish_to(bylaw)
    rescue StandardError => e
      raise "Failure in #{o}: #{e.message}"
    end
  when :aka
    @operands[0..-2].each do |o|
      o.publish_to(bylaw)
    rescue StandardError => e
      raise "Failure in #{o}: #{e.message}"
    end
    bylaw.revert(@operands.size - 1)
    bylaw.line(to_p(@operands[@operands.size - 1]))
  when :explain
    bylaw.intro(to_p(@operands[0]))
  when :in
    bylaw.line("assume that #{to_p(@operands[0])} is #{to_p(@operands[1])}")
  when :let
    bylaw.line("let #{to_p(@operands[0])} be equal to #{to_p(@operands[1])}")
    bylaw.let(@operands[0], @operands[1])
  when :set
    bylaw.line("set #{to_p(@operands[0])} to #{to_p(@operands[1])}")
  when :give
    bylaw.line("award #{to_p(@operands[0])}")
  else
    raise "Unknown term '#{@op}'"
  end
end

#static? ⇒ Boolean

Returns:

  • (Boolean) 


205
206
207
 
# File 'lib/fbe/award.rb', line 205

def static?
  true
end

#to_p(any) ⇒ Object 



245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
 
# File 'lib/fbe/award.rb', line 245

def to_p(any)
  case any
  when PTerm
    any.to_s
  when Symbol
    s = any.to_s
    subs = {
      0 => '₀',
      1 => '₁',
      2 => '₂',
      3 => '₃',
      4 => '₄',
      5 => '₅',
      6 => '₆',
      7 => '₇',
      8 => '₈',
      9 => '₉'
    }
    s.gsub!(/([a-z]+)([0-9])/) { |_| "#{Regexp.last_match[1]}#{subs[Regexp.last_match[2].to_i]}" }
    "_#{s.tr('_', '-')}_"
  when Integer, Float
    "**#{any}**"
  else
    any
  end
end

#to_s ⇒ Object 



164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
 
# File 'lib/fbe/award.rb', line 164

def to_s
  case @op
  when :total
    'total'
  when :if
    "if #{to_p(@operands[0])} then #{to_p(@operands[1])} else #{to_p(@operands[2])}"
  when :and
    @operands.map(&:to_s).join(' and ')
  when :or
    @operands.map(&:to_s).join(' or ')
  when :not
    "not #{@operands[0]}"
  when :eq
    "#{to_p(@operands[0])} = #{to_p(@operands[1])}"
  when :lt
    "#{to_p(@operands[0])} < #{to_p(@operands[1])}"
  when :lte
    "#{to_p(@operands[0])} ≤ #{to_p(@operands[1])}"
  when :gt
    "#{to_p(@operands[0])} > #{to_p(@operands[1])}"
  when :gte
    "#{to_p(@operands[0])} ≥ #{to_p(@operands[1])}"
  when :div
    "#{to_p(@operands[0])} ÷ #{to_p(@operands[1])}"
  when :times
    "#{to_p(@operands[0])} × #{to_p(@operands[1])}"
  when :plus
    "#{to_p(@operands[0])} + #{to_p(@operands[1])}"
  when :minus
    "#{to_p(@operands[0])} - #{to_p(@operands[1])}"
  when :max
    "maximum of #{to_p(@operands[0])} and #{to_p(@operands[1])}"
  when :min
    "minimum of #{to_p(@operands[0])} and #{to_p(@operands[1])}"
  when :between
    "at least #{to_p(@operands[0])} and at most #{to_p(@operands[1])}"
  else
    raise "Unknown term '#{@op}'"
  end
end