Class: Hornetseye::Inject

Inherits:
Node show all
Defined in:
lib/multiarray/inject.rb

Overview

Class for representing injections

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Node

#+@, #<=>, ===, #[], #[]=, #allocate, #b=, #b_with_decompose, basetype, #basetype, #between?, bool, byte, #check_shape, #clip, #coerce, coercion_bool, coercion_byte, coercion_maxint, #collect, compilable?, #components, cond, #conditional, #convolve, #decompose, define_binary_op, define_unary_op, descriptor, #diagonal, #dilate, #dimension, dimension, #downsample, #dup, #each, #empty?, #eq_with_multiarray, #erode, #fill!, #finalised?, #flip, float, float_scalar, floating, #fmod_with_float, #force, #g=, #g_with_decompose, #gauss_blur, #gauss_gradient, #get, #height, #histogram, #histogram_with_rgb, identity, #if, #if_else, #imag=, #imag_with_decompose, indgen, #inject, #inspect, #integral, #lut, #lut_with_rgb, #malloc, #mask, match, #matched?, #max, maxint, #mean, #memorise, #memory, #min, #normalise, #prod, #r=, #r_with_decompose, #range, #real=, #real_with_decompose, #reshape, #rgb?, rgb?, #roll, scalar, shape, #shift, #simplify, #size, #sobel, #stretch, #stride, #strides, strip, subst, #sum, #swap_rgb_with_scalar, #table, #to_a, #to_s, to_s, #to_type, to_type, #to_type_with_identity, #to_type_with_rgb, #transpose, typecode, typecodes, #unmask, #unroll, variables, #warp, #width

Methods included from Field_::Match

#align, #fit

Methods included from FLOAT_::Match

#align, #fit

Methods included from OBJECT::Match

#align, #fit

Methods included from COMPLEX_::Match

#align, #fit

Methods included from BOOL::Match

#fit

Methods included from RGB_::Match

#align, #fit

Methods included from Hornetseye::INT_::Match

#fit

Constructor Details

#initialize(value, index, initial, block, var1, var2) ⇒ Inject

Constructor

Parameters:

  • value (Node) —

    Initial value of injection.

  • index (Node) —

    Index to iterate over value.

  • initial (Node, NilClass) —

    Initial value for injection.

  • block (Node) —

    Expression with body of injection.

  • var1 (Variable) —

    Variable for performing substitutions on body of injection.

  • var2 (Variable) —

    Variable for performing substitutions on body of injection.



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# File 'lib/multiarray/inject.rb', line 48

def initialize( value, index, initial, block, var1, var2 )
  @value, @index, @initial, @block, @var1, @var2 =
    value, index, initial, block, var1, var2
end

Class Method Details

.finalised? ⇒ Boolean

Check whether objects of this class are finalised computations

Returns:

  • (Boolean) —

    Returns false.



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# File 'lib/multiarray/inject.rb', line 30

def finalised?
  false
end

Instance Method Details

#compilable? ⇒ Boolean

Check whether this term is compilable

Returns:

  • (Boolean) —

    Returns whether this term is compilable.



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# File 'lib/multiarray/inject.rb', line 165

def compilable?
  initial_compilable = @initial ? @initial.compilable? : true
  @value.compilable? and initial_compilable and @block.compilable?
end

#demand ⇒ Node, Object

Reevaluate computation

Returns:

See Also:



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# File 'lib/multiarray/inject.rb', line 84

def demand
  if @initial
    retval = @initial.to_type( typecode ).simplify # !!!
    offset = INT.new 0
  else
    retval = @value.subst( @index => INT.new( 0 ) ).simplify # !!!
    offset = INT.new 1
  end
  offset.upto @index.size - 1 do |i|
    sub = @value.subst @index => INT.new( i )
    retval.assign @block.subst(@var1 => retval, @var2 => sub)
  end
  retval
end

#descriptor(hash) ⇒ String

Get unique descriptor of this object

Parameters:

  • hash (Hash) —

    Labels for any variables.

Returns:

  • (String) —

    Descriptor of this object,



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# File 'lib/multiarray/inject.rb', line 60

def descriptor( hash )
  hash = hash.merge @index => ( ( hash.values.max || 0 ) + 1 )
  hash = hash.merge @var1 => ( ( hash.values.max || 0 ) + 1 )
  hash = hash.merge @var2 => ( ( hash.values.max || 0 ) + 1 )
  "Inject(#{@value.descriptor( hash )}," +
     "#{@initial ? @initial.descriptor( hash ) : 'nil'}," +
     "#{@index.descriptor( hash )},#{@block.descriptor( hash )})"
end

#element(i) ⇒ Node, Object

Get element of injection

Parameters:

  • i (Integer, Node) —

    Index of desired element.

Returns:



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# File 'lib/multiarray/inject.rb', line 106

def element( i )
  self.class.new @value.element( i ), @index, @initial, @block, @var1, @var2
end

#shape ⇒ Object 



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# File 'lib/multiarray/inject.rb', line 73

def shape
  @value.to_type(@block.typecode).shape
end

#strip ⇒ Array<Array,Node>

Strip of all values

Split up into variables, values, and a term where all values have been replaced with variables.

values, and the term based on variables.

Returns:



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# File 'lib/multiarray/inject.rb', line 129

def strip
  meta_vars, meta_values, var = @index.strip
  vars1, values1, term1 = @value.subst( @index => var ).strip
  if @initial
    vars2, values2, term2 = @initial.strip
  else
    vars2, values2 = [], [], nil
  end
  vars3, values3, term3 = @block.strip
  return vars1 + vars2 + vars3 + meta_vars,
    values1 + values2 + values3 + meta_values,
    self.class.new( term1, var, term2, term3, @var1, @var2 )
end

#subst(hash) ⇒ Node

Substitute variables

Substitute the variables with the values given in the hash.

Parameters:

  • hash (Hash) —

    Substitutions to apply.

Returns:

  • (Node) —

    Term with substitutions applied.



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# File 'lib/multiarray/inject.rb', line 152

def subst( hash )
  subst_var = @index.subst hash
  value = @value.subst( @index => subst_var ).subst hash
  initial = @initial ? @initial.subst( hash ) : nil
  block = @block.subst hash
  self.class.new value, subst_var, initial, block, @var1, @var2
end

#typecode ⇒ Object 



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# File 'lib/multiarray/inject.rb', line 69

def typecode
  @block.typecode
end

#variables ⇒ Set

Get variables contained in this term

Returns:

  • (Set) —

    Returns set of variables.



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# File 'lib/multiarray/inject.rb', line 115

def variables
  initial_variables = @initial ? @initial.variables : Set[]
  ( @value.variables + initial_variables ) - @index.variables
end