Vector Representation R←⎕VR Y

Y must be a simple character scalar or vector which represents the name of a function or defined operator.

If Y is the name of a defined function or defined operator, R is a simple character vector containing a character representation of the function or operator with each line except the last terminated by the newline character (⎕UCS ⎕AVU[4]).

Its display form is as follows:

  1. the header line starts at column 8 with the ∇ symbol in column 6,
  2. the line number for each line of the function starts in column 1,
  3. the statement contained in each line starts at column 8 except for labelled lines or lines beginning with ⍝ which start at column 7,
  4. the header line and statements contain no redundant blanks beyond column 7 except that the ⋄ separator is surrounded by single blanks, control structure indentation is preserved and comments retain embedded blanks as originally defined,
  5. the last line shows only the ∇ character in column 6.

If Y is the name of a variable, a locked function or operator, an external function, or is undefined, R is an empty vector.

Example

      ⍴V←⎕VR'PLUS'
128

      V
     ∇ R←{A}PLUS B
[1]   ⍝ MONADIC OR DYADIC +
[2]    →DYADIC⍴⍨2=⎕NC'A' ⋄ R←B ⋄ →END
[3]   DYADIC:R←A+B ⋄ →END
[4]   END:
     ∇

The definition of ⎕VR has been extended to names assigned to functions by specification (←), and to local names of functions used as operands to defined operators. In these cases, the result of ⎕VR is identical to that of ⎕CR except that the representation of defined functions and operators is as described above.

Example

      AVG←MEAN∘,

      +F←⎕VR'AVG'
      ∇ R←MEAN X    ⍝ Arithmetic mean
[1]     R←(+/X)÷⍴X
     ∇ ∘,

      ⍴F
3

      ]display F
┌→───────────────────────────────────────────┐
│ ┌→───────────────────────────────────┐     │
│ │     ∇ R←MEAN X    ⍝ Arithmetic mean│ ∘ , │
│ │[1]    R←(+/X)÷⍴X                   │ - - │
│ │     ∇                              │     │
│ └────────────────────────────────────┘     │
└∊───────────────────────────────────────────┘