array_index

One subscript or one range of a subscript list.

Declaration

Syntax

array_index = (expr? left, expr? right, expr? step)

Arguments

Argument

Description

left

the first index of a range.

right

the last index of a range, or the subscript itself when left and step are nil.

step

the stride of a range.

Return values

None.

Description

The same product serves an element and a section. In an ArrayItem only right is set, and it is the subscript. In an ArraySection a dimension with left, right and step is a range, while a dimension with only right fixes that subscript and drops the dimension from the result.

Examples

(array_index
  :left nil
  :right (IntegerConstant
    :n 2
    :type (Integer
      :kind 4
    )
    :intboz_type :Decimal
  )
  :step nil
)

It comes from this complete ASR text document:

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              :intent :Local
              :symbolic_value nil
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                :type (Integer
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                :dims [
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                    :start (IntegerConstant
                      :n 1
                      :type (Integer
                        :kind 4
                      )
                      :intboz_type :Decimal
                    )
                    :length (IntegerConstant
                      :n 3
                      :type (Integer
                        :kind 4
                      )
                      :intboz_type :Decimal
                    )
                  )
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                :physical_type :FixedSizeArray
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                      :type (Integer
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                      :intboz_type :Decimal
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                    :length (IntegerConstant
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                      :type (Integer
                        :kind 4
                      )
                      :intboz_type :Decimal
                    )
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          (Assignment
            :target (Var
              :v (SymbolRef 1 "a")
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            :value (ArrayConstant
              :n_data 12
              :data #asr/bytes "010000000200000003000000"
              :type (Array
                :type (Integer
                  :kind 4
                )
                :dims [
                  (dimension
                    :start (IntegerConstant
                      :n 1
                      :type (Integer
                        :kind 4
                      )
                      :intboz_type :Decimal
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                        :kind 4
                      )
                      :intboz_type :Decimal
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                      :kind 4
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                    :intboz_type :Decimal
                  )
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              :args [
                (array_index
                  :left (IntegerConstant
                    :n 1
                    :type (Integer
                      :kind 4
                    )
                    :intboz_type :Decimal
                  )
                  :right (IntegerConstant
                    :n 3
                    :type (Integer
                      :kind 4
                    )
                    :intboz_type :Decimal
                  )
                  :step (IntegerConstant
                    :n 1
                    :type (Integer
                      :kind 4
                    )
                    :intboz_type :Decimal
                  )
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              :type (Array
                :type (Integer
                  :kind 4
                )
                :dims [
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                    :start (IntegerConstant
                      :n 1
                      :type (Integer
                        :kind 4
                      )
                      :intboz_type :Decimal
                    )
                    :length (IntegerConstant
                      :n 3
                      :type (Integer
                        :kind 4
                      )
                      :intboz_type :Decimal
                    )
                  )
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                :physical_type :DescriptorArray
              )
              :value nil
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              :dim (IntegerConstant
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                :type (Integer
                  :kind 4
                )
                :intboz_type :Decimal
              )
              :type (Integer
                :kind 4
              )
              :value nil
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            :move_allocation false
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          (Assignment
            :target (Var
              :v (SymbolRef 1 "i")
            )
            :value (ArrayRank
              :v (Var
                :v (SymbolRef 1 "a")
              )
              :type (Integer
                :kind 4
              )
              :value nil
            )
            :overloaded nil
            :realloc_lhs false
            :move_allocation false
          )
          (Assignment
            :target (Var
              :v (SymbolRef 1 "i")
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            :value (ArrayBound
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                :v (SymbolRef 1 "a")
              )
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                :type (Integer
                  :kind 4
                )
                :intboz_type :Decimal
              )
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                :kind 4
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              :value nil
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    }
  )
  :items []
)

See Also

ArrayItem, ArraySection, ListSection, dimension