denotype

From the SETL Wiki

denotype
Category	string
Syntax	prefix
Compatibility
CIMS SETL	no
SETL-S	no
SETL2	no
GNU SETL	yes

Contents 1 Purpose 2 Synopsis 3 Description 4 Examples

Purpose

Determine the type of value that would be parsed from a string by unstr

Synopsis

 denotype s

Description

Returns the name of the type of the value denoted in the string s, if any.
Almost equivalent to type(unstr s), except that it returns om if s contains invalid input to unstr, i.e. if s is not the string representation of a valid SETL value.

Examples

• denotype '42'
  

  Result: 'INTEGER'

• denotype '[][[[1!@#$'
  

  Result: om

• numbers := [unstr line: line in split(getfile('numbers.txt'), "\n"), t in {denotype(line)} | t = "INTEGER"];
  

  Returns a tuple. For each line of in "numbers.txt" that contains a decimal integer, that integer value is included in the tuple.