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* lib/date/delta.rb: merged from date4. [experimental]
* lib/date/delta/parser.*: ditto. * lib/date.rb: followed the above changes. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24567 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
tadf
parent
cfed2cefb2
commit
ae3a58e8c5
5 changed files with 810 additions and 1 deletions
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@ -1,3 +1,11 @@
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Mon Aug 17 08:31:56 2009 Tadayoshi Funaba <tadf@dotrb.org>
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* lib/date/delta.rb: merged from date4. [experimental]
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* lib/date/delta/parser.*: ditto.
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* lib/date.rb: followed the above changes.
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Mon Aug 17 08:19:03 2009 Tadayoshi Funaba <tadf@dotrb.org>
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* lib/date/format.rb (strptime): removed \v; since \s includes \v.
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18
lib/date.rb
18
lib/date.rb
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@ -194,6 +194,7 @@
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# puts secs_to_new_year()
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require 'date/format'
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require 'date/delta'
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# Class representing a date.
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#
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@ -1336,6 +1337,9 @@ class Date
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def + (n)
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case n
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when Numeric; return self.class.new!(@ajd + n, @of, @sg)
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when Delta
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d = n.__send__(:delta)
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return (self >> d.imag) + d.real
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end
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raise TypeError, 'expected numeric'
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end
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@ -1352,8 +1356,11 @@ class Date
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case x
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when Numeric; return self.class.new!(@ajd - x, @of, @sg)
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when Date; return @ajd - x.ajd
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when Delta
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d = x.__send__(:delta)
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return (self << d.imag) - d.real
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end
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raise TypeError, 'expected numeric or date'
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raise TypeError, 'expected numeric'
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end
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# Compare this date with another date.
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@ -1371,6 +1378,12 @@ class Date
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case other
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when Numeric; return @ajd <=> other
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when Date; return @ajd <=> other.ajd
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else
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begin
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l, r = other.coerce(self)
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return l <=> r
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rescue NoMethodError
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end
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end
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nil
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end
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@ -1385,6 +1398,9 @@ class Date
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case other
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when Numeric; return jd == other
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when Date; return jd == other.jd
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else
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l, r = other.coerce(self)
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return l === r
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end
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false
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end
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400
lib/date/delta.rb
Normal file
400
lib/date/delta.rb
Normal file
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@ -0,0 +1,400 @@
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# delta.rb: Written by Tadayoshi Funaba 2004-2009
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require 'date'
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require 'date/delta/parser'
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class Date
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class Delta
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include Comparable
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UNIT_PREFIXES = {
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'yotta' => Rational(10**24),
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'zetta' => Rational(10**21),
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'exa' => Rational(10**18),
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'peta' => Rational(10**15),
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'tera' => Rational(10**12),
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'giga' => Rational(10**9),
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'mega' => Rational(10**6),
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'kilo' => Rational(10**3),
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'hecto' => Rational(10**2),
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'deca' => Rational(10**1),
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'deka' => Rational(10**1),
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'deci' => Rational(1, 10**1),
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'centi' => Rational(1, 10**2),
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'milli' => Rational(1, 10**3),
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'decimilli' => Rational(1, 10**4),
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'centimilli' => Rational(1, 10**5),
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'micro' => Rational(1, 10**6),
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'nano' => Rational(1, 10**9),
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'millimicro' => Rational(1, 10**9),
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'pico' => Rational(1, 10**12),
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'micromicro' => Rational(1, 10**12),
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'femto' => Rational(1, 10**15),
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'atto' => Rational(1, 10**18),
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'zepto' => Rational(1, 10**21),
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'yocto' => Rational(1, 10**24)
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}
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IUNITS = {
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'year' => Complex(0, 12),
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'month' => Complex(0, 1)
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}
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RUNITS = {
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'day' => Rational(1),
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'week' => Rational(7),
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'sennight' => Rational(7),
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'fortnight' => Rational(14),
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'hour' => Rational(1, 24),
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'minute' => Rational(1, 1440),
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'second' => Rational(1, 86400)
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}
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UNIT_PREFIXES.each do |k, v|
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RUNITS[k + 'second'] = v * RUNITS['second']
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end
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remove_const :UNIT_PREFIXES
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UNITS = {}
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IUNITS.each do |k, v|
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UNITS[k] = v
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end
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RUNITS.each do |k, v|
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UNITS[k] = v
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end
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UNITS4KEY = {}
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UNITS.each do |k, v|
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UNITS4KEY[k] = UNITS4KEY[k + 's'] = v
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end
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UNITS4KEY['y'] = UNITS4KEY['years']
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UNITS4KEY['yr'] = UNITS4KEY['years']
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UNITS4KEY['yrs'] = UNITS4KEY['years']
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UNITS4KEY['m'] = UNITS4KEY['months']
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UNITS4KEY['mo'] = UNITS4KEY['months']
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UNITS4KEY['mon'] = UNITS4KEY['months']
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UNITS4KEY['mnth'] = UNITS4KEY['months']
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UNITS4KEY['mnths'] = UNITS4KEY['months']
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UNITS4KEY['w'] = UNITS4KEY['weeks']
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UNITS4KEY['wk'] = UNITS4KEY['weeks']
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UNITS4KEY['d'] = UNITS4KEY['days']
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UNITS4KEY['dy'] = UNITS4KEY['days']
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UNITS4KEY['dys'] = UNITS4KEY['days']
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UNITS4KEY['h'] = UNITS4KEY['hours']
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UNITS4KEY['hr'] = UNITS4KEY['hours']
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UNITS4KEY['hrs'] = UNITS4KEY['hours']
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UNITS4KEY['min'] = UNITS4KEY['minutes']
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UNITS4KEY['mins'] = UNITS4KEY['minutes']
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UNITS4KEY['s'] = UNITS4KEY['seconds']
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UNITS4KEY['sec'] = UNITS4KEY['seconds']
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UNITS4KEY['secs'] = UNITS4KEY['seconds']
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UNITS4KEY['ms'] = UNITS4KEY['milliseconds']
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UNITS4KEY['msec'] = UNITS4KEY['milliseconds']
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UNITS4KEY['msecs'] = UNITS4KEY['milliseconds']
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UNITS4KEY['milli'] = UNITS4KEY['milliseconds']
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UNITS4KEY['us'] = UNITS4KEY['microseconds']
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UNITS4KEY['usec'] = UNITS4KEY['microseconds']
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UNITS4KEY['usecs'] = UNITS4KEY['microseconds']
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UNITS4KEY['micro'] = UNITS4KEY['microseconds']
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UNITS4KEY['ns'] = UNITS4KEY['nanoseconds']
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UNITS4KEY['nsec'] = UNITS4KEY['nanoseconds']
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UNITS4KEY['nsecs'] = UNITS4KEY['nanoseconds']
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UNITS4KEY['nano'] = UNITS4KEY['nanoseconds']
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def self.delta_to_dhms(delta)
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fr = delta.imag.abs
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y, fr = fr.divmod(12)
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m, fr = fr.divmod(1)
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if delta.imag < 0
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y = -y
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m = -m
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end
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fr = delta.real.abs
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ss, fr = fr.divmod(SECONDS_IN_DAY) # 4p
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d, ss = ss.divmod(86400)
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h, ss = ss.divmod(3600)
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min, s = ss.divmod(60)
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if delta.real < 0
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d = -d
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h = -h
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min = -min
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s = -s
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end
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return y, m, d, h, min, s, fr
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end
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def self.dhms_to_delta(y, m, d, h, min, s, fr)
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fr = 0 if fr == 0
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Complex(0, y.to_i * 12 + m.to_i) +
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Rational(d * 86400 + h * 3600 + min * 60 + (s + fr), 86400) # 4p
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end
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def initialize(delta)
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@delta = delta
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@__ca__ = {}
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end
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class << self; alias_method :new!, :new end
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def self.new(arg=0, h=0, min=0, s=0)
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if Hash === arg
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d = Complex(0)
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arg.each do |k, v|
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k = k.to_s.downcase
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unless UNITS4KEY[k]
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raise ArgumentError, "unknown keyword #{k}"
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end
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d += v * UNITS4KEY[k]
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end
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else
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d = dhms_to_delta(0, 0, arg, h, min, s, 0)
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end
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new!(d)
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end
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UNITS.each_key do |k|
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module_eval <<-"end;"
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def self.#{k}s(n=1)
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new(:d=>n * UNITS['#{k}'])
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end
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end;
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end
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class << self; alias_method :mins, :minutes end
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class << self; alias_method :secs, :seconds end
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def self.parse(str)
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d = begin (@@pa ||= Parser.new).parse(str)
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rescue Racc::ParseError
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raise ArgumentError, 'syntax error'
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end
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new!(d)
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end
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def self.diff(d1, d2) new(d1.ajd - d2.ajd) end
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class << self
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def once(*ids) # :nodoc: -- restricted
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for id in ids
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module_eval <<-"end;"
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alias_method :__#{id.object_id}__, :#{id.to_s}
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private :__#{id.object_id}__
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def #{id.to_s}(*args)
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@__ca__[#{id.object_id}] ||= __#{id.object_id}__(*args)
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end
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end;
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end
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end
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private :once
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end
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def dhms() self.class.delta_to_dhms(@delta) end
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once :dhms
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def delta() @delta end
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protected :delta
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def years() dhms[0] end
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def months() dhms[1] end
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def days() dhms[2] end
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def hours() dhms[3] end
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def minutes() dhms[4] end
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def seconds() dhms[5] end
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def second_fractions() dhms[6] end
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alias_method :mins, :minutes
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alias_method :secs, :seconds
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alias_method :sec_fractions, :second_fractions
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RUNITS.each_key do |k|
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module_eval <<-"end;"
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def in_#{k}s(u=1)
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if @delta.imag != 0
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raise ArgumentError, "#{k}: #{self} has month"
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end
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@delta.real / (u * RUNITS['#{k}'])
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end
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end;
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end
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alias_method :in_mins, :in_minutes
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alias_method :in_secs, :in_seconds
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def zero?() @delta.zero? end
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def nonzero?() unless zero? then self end end
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def integer? () @delta.imag == 0 && @delta.real.integer? end
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def -@ () self.class.new!(-@delta) end
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def +@ () self.class.new!(+@delta) end
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def dx_addsub(m, n)
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case n
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when Numeric; return self.class.new!(@delta.__send__(m, n))
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when Delta; return self.class.new!(@delta.__send__(m, n.delta))
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else
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l, r = n.coerce(self)
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return l.__send__(m, r)
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end
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end
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private :dx_addsub
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def + (n) dx_addsub(:+, n) end
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def - (n) dx_addsub(:-, n) end
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def dx_muldiv(m, n)
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case n
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when Numeric
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return self.class.new!(@delta.__send__(m, n))
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else
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l, r = n.coerce(self)
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return l.__send__(m, r)
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end
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end
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private :dx_muldiv
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def * (n) dx_muldiv(:*, n) end
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def / (n) dx_muldiv(:/, n) end
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def dx_conv1(m, n)
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if @delta.imag != 0
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raise ArgumentError, "#{m}: #{self} has month"
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end
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case n
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when Numeric
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return self.class.new!(Complex(@delta.real.__send__(m, n), 0))
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else
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l, r = n.coerce(self)
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return l.__send__(m, r)
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end
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end
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private :dx_conv1
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def % (n) dx_conv1(:%, n) end
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def div(n) dx_conv1(:div, n) end
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def modulo(n) dx_conv1(:modulo, n) end
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def divmod(n) [div(n), modulo(n)] end
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def quotient(n)
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if @delta.imag != 0
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raise ArgumentError, "quotient: #{self} has month"
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end
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case n
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when Numeric
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return self.class.new!(Complex((@delta.real / n).truncate))
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else
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l, r = n.coerce(self)
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return l.__send__(m, r)
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end
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end
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def remainder(n) dx_conv1(:remainder, n) end
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def quotrem(n) [quotient(n), remainder(n)] end
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def ** (n) dx_conv1(:**, n) end
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def quo(n) dx_muldiv(:quo, n) end
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def <=> (other)
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if @delta.imag != 0
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raise ArgumentError, "<=>: #{self} has month"
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end
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case other
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when Numeric; return @delta.real <=> other
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when Delta; return @delta.real <=> other.delta.real
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else
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begin
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l, r = other.coerce(self)
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return l <=> r
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rescue NoMethodError
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end
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end
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nil
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end
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def == (other)
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case other
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when Numeric; return @delta == other
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when Delta; return @delta == other
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else
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begin
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l, r = other.coerce(self)
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return l == r
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rescue NoMethodError
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||||
end
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end
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nil
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end
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def coerce(other)
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case other
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when Numeric; return other, @delta
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else
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super
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end
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end
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|
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def eql? (other) Delta === other && self == other end
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def hash() @delta.hash end
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|
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def dx_conv0(m)
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if @delta.imag != 0
|
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raise ArgumentError, "#{m}: #{self} has month"
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end
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@delta.real.__send__(m)
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end
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private :dx_conv0
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def abs() dx_conv0(:abs) end
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|
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def ceil() dx_conv0(:ceil) end
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def floor() dx_conv0(:floor) end
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def round() dx_conv0(:round) end
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def truncate() dx_conv0(:truncate) end
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|
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def to_i() dx_conv0(:to_i) end
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def to_f() dx_conv0(:to_f) end
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def to_r() dx_conv0(:to_r) end
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alias_method :to_int, :to_i
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def inspect() format('#<%s: %s (%s)>', self.class, to_s, @delta) end
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|
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def to_s
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format(%(%s(%dd %.02d:%02d'%02d"%03d)%s(%dy %dm)), # '
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if @delta.real < 0 then '-' else '+' end,
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days.abs, hours.abs, mins.abs, secs.abs, sec_fractions.abs * 1000,
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if @delta.imag < 0 then '-' else '+' end,
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years.abs, months.abs)
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end
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||||
|
||||
def marshal_dump() @delta end
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def marshal_load(a)
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@delta = a
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@__ca__ = {}
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||||
end
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||||
|
||||
end
|
||||
|
||||
end
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301
lib/date/delta/parser.rb
Normal file
301
lib/date/delta/parser.rb
Normal file
|
|
@ -0,0 +1,301 @@
|
|||
#
|
||||
# DO NOT MODIFY!!!!
|
||||
# This file is automatically generated by racc 1.4.5
|
||||
# from racc grammer file "parser.ry".
|
||||
#
|
||||
|
||||
require 'racc/parser'
|
||||
|
||||
|
||||
class Date
|
||||
|
||||
class Delta
|
||||
|
||||
class Parser < Racc::Parser
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||||
|
||||
module_eval <<'..end parser.ry modeval..id43bff5dec9', 'parser.ry', 42
|
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|
||||
def lookup(str)
|
||||
t = str.downcase
|
||||
k = UNITS4KEY[t]
|
||||
return [:UNIT, k] if k
|
||||
return [:AND, nil] if t == 'and'
|
||||
return [:UNKNOWNWORD, nil]
|
||||
end
|
||||
|
||||
def parse(str)
|
||||
@q = []
|
||||
until str.empty?
|
||||
case str
|
||||
when /\A\s+/
|
||||
when /\AP(\d+y)?(\d+m)?(\d+d)?t?(\d+h)?(\d+m)?(\d+s)?(\d+w)?/i
|
||||
y, m, d, h, min, s, w =
|
||||
[$1, $2, $3, $4, $5, $6, $7].collect{|x| x.to_i}
|
||||
y *= UNITS4KEY['years']
|
||||
m *= UNITS4KEY['months']
|
||||
d *= UNITS4KEY['days']
|
||||
h *= UNITS4KEY['hours']
|
||||
min *= UNITS4KEY['minutes']
|
||||
s *= UNITS4KEY['seconds']
|
||||
w *= UNITS4KEY['weeks']
|
||||
@q.push [:DURATION, y + m + d + h + min + s + w]
|
||||
when /\A\d+/
|
||||
@q.push [:DIGITS, $&.to_i]
|
||||
when /\A[a-z]+/i
|
||||
@q.push lookup($&)
|
||||
when /\A.|\n/
|
||||
@q.push [$&, $&]
|
||||
end
|
||||
str = $'
|
||||
end
|
||||
@q.push [false, false]
|
||||
do_parse
|
||||
end
|
||||
|
||||
def next_token
|
||||
@q.shift
|
||||
end
|
||||
|
||||
..end parser.ry modeval..id43bff5dec9
|
||||
|
||||
##### racc 1.4.5 generates ###
|
||||
|
||||
racc_reduce_table = [
|
||||
0, 0, :racc_error,
|
||||
1, 16, :_reduce_none,
|
||||
1, 17, :_reduce_none,
|
||||
1, 17, :_reduce_none,
|
||||
3, 17, :_reduce_4,
|
||||
3, 17, :_reduce_5,
|
||||
3, 17, :_reduce_6,
|
||||
3, 17, :_reduce_7,
|
||||
3, 17, :_reduce_8,
|
||||
3, 17, :_reduce_9,
|
||||
3, 17, :_reduce_10,
|
||||
2, 17, :_reduce_11,
|
||||
2, 17, :_reduce_12,
|
||||
3, 17, :_reduce_13,
|
||||
2, 18, :_reduce_14,
|
||||
0, 20, :_reduce_15,
|
||||
1, 20, :_reduce_none,
|
||||
1, 19, :_reduce_none ]
|
||||
|
||||
racc_reduce_n = 18
|
||||
|
||||
racc_shift_n = 32
|
||||
|
||||
racc_action_table = [
|
||||
13, 14, 15, 16, 17, 18, 19, 4, 27, 23,
|
||||
8, 9, 1, 4, 25, 2, 8, 9, 1, 4,
|
||||
24, 2, 8, 9, 1, 4, 21, 2, 8, 9,
|
||||
1, 4, 11, 2, 8, 9, 1, 4, 26, 2,
|
||||
8, 9, 1, 4, nil, 2, 8, 9, 1, 4,
|
||||
nil, 2, 8, 9, 1, nil, nil, 2, 13, 14,
|
||||
15, 16, 17, 18, 19, 13, 14, 15, 13, 14,
|
||||
15, 13, 14, 15, 13, 14, 15 ]
|
||||
|
||||
racc_action_check = [
|
||||
10, 10, 10, 10, 10, 10, 10, 17, 15, 10,
|
||||
17, 17, 17, 18, 13, 17, 18, 18, 18, 4,
|
||||
11, 18, 4, 4, 4, 1, 9, 4, 1, 1,
|
||||
1, 8, 3, 1, 8, 8, 8, 19, 14, 8,
|
||||
19, 19, 19, 0, nil, 19, 0, 0, 0, 16,
|
||||
nil, 0, 16, 16, 16, nil, nil, 16, 5, 5,
|
||||
5, 5, 5, 5, 5, 30, 30, 30, 28, 28,
|
||||
28, 29, 29, 29, 31, 31, 31 ]
|
||||
|
||||
racc_action_pointer = [
|
||||
37, 19, nil, 32, 13, 55, nil, nil, 25, 13,
|
||||
-3, 20, nil, 4, 28, -2, 43, 1, 7, 31,
|
||||
nil, nil, nil, nil, nil, nil, nil, nil, 65, 68,
|
||||
62, 71 ]
|
||||
|
||||
racc_action_default = [
|
||||
-18, -18, -17, -18, -18, -1, -2, -3, -18, -15,
|
||||
-18, -18, -12, -18, -18, -18, -18, -18, -18, -18,
|
||||
-11, -16, -14, -13, 32, -10, -8, -9, -4, -5,
|
||||
-6, -7 ]
|
||||
|
||||
racc_goto_table = [
|
||||
5, 10, 3, 22, 12, nil, nil, nil, 20, nil,
|
||||
nil, nil, nil, nil, nil, nil, 28, 29, 30, 31 ]
|
||||
|
||||
racc_goto_check = [
|
||||
2, 2, 1, 5, 2, nil, nil, nil, 2, nil,
|
||||
nil, nil, nil, nil, nil, nil, 2, 2, 2, 2 ]
|
||||
|
||||
racc_goto_pointer = [
|
||||
nil, 2, 0, nil, nil, -6 ]
|
||||
|
||||
racc_goto_default = [
|
||||
nil, nil, nil, 6, 7, nil ]
|
||||
|
||||
racc_token_table = {
|
||||
false => 0,
|
||||
Object.new => 1,
|
||||
:UNARY => 2,
|
||||
"^" => 3,
|
||||
"*" => 4,
|
||||
"/" => 5,
|
||||
"+" => 6,
|
||||
"," => 7,
|
||||
:AND => 8,
|
||||
"-" => 9,
|
||||
:DIGITS => 10,
|
||||
"(" => 11,
|
||||
")" => 12,
|
||||
:UNIT => 13,
|
||||
:DURATION => 14 }
|
||||
|
||||
racc_use_result_var = true
|
||||
|
||||
racc_nt_base = 15
|
||||
|
||||
Racc_arg = [
|
||||
racc_action_table,
|
||||
racc_action_check,
|
||||
racc_action_default,
|
||||
racc_action_pointer,
|
||||
racc_goto_table,
|
||||
racc_goto_check,
|
||||
racc_goto_default,
|
||||
racc_goto_pointer,
|
||||
racc_nt_base,
|
||||
racc_reduce_table,
|
||||
racc_token_table,
|
||||
racc_shift_n,
|
||||
racc_reduce_n,
|
||||
racc_use_result_var ]
|
||||
|
||||
Racc_token_to_s_table = [
|
||||
'$end',
|
||||
'error',
|
||||
'UNARY',
|
||||
'"^"',
|
||||
'"*"',
|
||||
'"/"',
|
||||
'"+"',
|
||||
'","',
|
||||
'AND',
|
||||
'"-"',
|
||||
'DIGITS',
|
||||
'"("',
|
||||
'")"',
|
||||
'UNIT',
|
||||
'DURATION',
|
||||
'$start',
|
||||
'stmt',
|
||||
'expr',
|
||||
'time',
|
||||
'iso',
|
||||
'unit']
|
||||
|
||||
Racc_debug_parser = false
|
||||
|
||||
##### racc system variables end #####
|
||||
|
||||
# reduce 0 omitted
|
||||
|
||||
# reduce 1 omitted
|
||||
|
||||
# reduce 2 omitted
|
||||
|
||||
# reduce 3 omitted
|
||||
|
||||
module_eval <<'.,.,', 'parser.ry', 18
|
||||
def _reduce_4( val, _values, result )
|
||||
result += val[2]
|
||||
result
|
||||
end
|
||||
.,.,
|
||||
|
||||
module_eval <<'.,.,', 'parser.ry', 19
|
||||
def _reduce_5( val, _values, result )
|
||||
result += val[2]
|
||||
result
|
||||
end
|
||||
.,.,
|
||||
|
||||
module_eval <<'.,.,', 'parser.ry', 20
|
||||
def _reduce_6( val, _values, result )
|
||||
result += val[2]
|
||||
result
|
||||
end
|
||||
.,.,
|
||||
|
||||
module_eval <<'.,.,', 'parser.ry', 21
|
||||
def _reduce_7( val, _values, result )
|
||||
result -= val[2]
|
||||
result
|
||||
end
|
||||
.,.,
|
||||
|
||||
module_eval <<'.,.,', 'parser.ry', 22
|
||||
def _reduce_8( val, _values, result )
|
||||
result *= val[2]
|
||||
result
|
||||
end
|
||||
.,.,
|
||||
|
||||
module_eval <<'.,.,', 'parser.ry', 23
|
||||
def _reduce_9( val, _values, result )
|
||||
result /= val[2]
|
||||
result
|
||||
end
|
||||
.,.,
|
||||
|
||||
module_eval <<'.,.,', 'parser.ry', 24
|
||||
def _reduce_10( val, _values, result )
|
||||
result **= val[2]
|
||||
result
|
||||
end
|
||||
.,.,
|
||||
|
||||
module_eval <<'.,.,', 'parser.ry', 25
|
||||
def _reduce_11( val, _values, result )
|
||||
result = -val[1]
|
||||
result
|
||||
end
|
||||
.,.,
|
||||
|
||||
module_eval <<'.,.,', 'parser.ry', 26
|
||||
def _reduce_12( val, _values, result )
|
||||
result = +val[1]
|
||||
result
|
||||
end
|
||||
.,.,
|
||||
|
||||
module_eval <<'.,.,', 'parser.ry', 27
|
||||
def _reduce_13( val, _values, result )
|
||||
result = val[1]
|
||||
result
|
||||
end
|
||||
.,.,
|
||||
|
||||
module_eval <<'.,.,', 'parser.ry', 30
|
||||
def _reduce_14( val, _values, result )
|
||||
result = val[0] * val[1]
|
||||
result
|
||||
end
|
||||
.,.,
|
||||
|
||||
module_eval <<'.,.,', 'parser.ry', 33
|
||||
def _reduce_15( val, _values, result )
|
||||
result = 1
|
||||
result
|
||||
end
|
||||
.,.,
|
||||
|
||||
# reduce 16 omitted
|
||||
|
||||
# reduce 17 omitted
|
||||
|
||||
def _reduce_none( val, _values, result )
|
||||
result
|
||||
end
|
||||
|
||||
end # class Parser
|
||||
|
||||
end # class Delta
|
||||
|
||||
end # class Date
|
||||
84
lib/date/delta/parser.ry
Normal file
84
lib/date/delta/parser.ry
Normal file
|
|
@ -0,0 +1,84 @@
|
|||
# parser.ry: Written by Tadayoshi Funaba 2006,2008,2009 -*- ruby -*-
|
||||
|
||||
class Date::Delta::Parser
|
||||
|
||||
prechigh
|
||||
nonassoc UNARY
|
||||
left '^'
|
||||
left '*' '/'
|
||||
left '+' ',' AND '-'
|
||||
preclow
|
||||
|
||||
rule
|
||||
|
||||
stmt : expr
|
||||
;
|
||||
|
||||
expr : time
|
||||
| iso
|
||||
| expr '+' expr {result += val[2]}
|
||||
| expr ',' expr {result += val[2]}
|
||||
| expr AND expr {result += val[2]}
|
||||
| expr '-' expr {result -= val[2]}
|
||||
| expr '*' DIGITS {result *= val[2]}
|
||||
| expr '/' DIGITS {result /= val[2]}
|
||||
| expr '^' DIGITS {result **= val[2]}
|
||||
| '-' expr =UNARY {result = -val[1]}
|
||||
| '+' expr =UNARY {result = +val[1]}
|
||||
| '(' expr ')' {result = val[1]}
|
||||
;
|
||||
|
||||
time : DIGITS unit {result = val[0] * val[1]}
|
||||
;
|
||||
|
||||
unit : {result = 1} | UNIT
|
||||
;
|
||||
|
||||
iso : DURATION
|
||||
;
|
||||
|
||||
---- header ----
|
||||
---- inner ----
|
||||
|
||||
def lookup(str)
|
||||
t = str.downcase
|
||||
k = UNITS4KEY[t]
|
||||
return [:UNIT, k] if k
|
||||
return [:AND, nil] if t == 'and'
|
||||
return [:UNKNOWNWORD, nil]
|
||||
end
|
||||
|
||||
def parse(str)
|
||||
@q = []
|
||||
until str.empty?
|
||||
case str
|
||||
when /\A\s+/
|
||||
when /\AP(\d+y)?(\d+m)?(\d+d)?t?(\d+h)?(\d+m)?(\d+s)?(\d+w)?/i
|
||||
y, m, d, h, min, s, w =
|
||||
[$1, $2, $3, $4, $5, $6, $7].collect{|x| x.to_i}
|
||||
y *= UNITS4KEY['years']
|
||||
m *= UNITS4KEY['months']
|
||||
d *= UNITS4KEY['days']
|
||||
h *= UNITS4KEY['hours']
|
||||
min *= UNITS4KEY['minutes']
|
||||
s *= UNITS4KEY['seconds']
|
||||
w *= UNITS4KEY['weeks']
|
||||
@q.push [:DURATION, y + m + d + h + min + s + w]
|
||||
when /\A\d+/
|
||||
@q.push [:DIGITS, $&.to_i]
|
||||
when /\A[a-z]+/i
|
||||
@q.push lookup($&)
|
||||
when /\A.|\n/
|
||||
@q.push [$&, $&]
|
||||
end
|
||||
str = $'
|
||||
end
|
||||
@q.push [false, false]
|
||||
do_parse
|
||||
end
|
||||
|
||||
def next_token
|
||||
@q.shift
|
||||
end
|
||||
|
||||
---- footer ----
|
||||
Loading…
Add table
Add a link
Reference in a new issue