swift/printer.swift

   1 //******************************************************************************
   2 // MAL - printer
   3 //******************************************************************************
   4
   5 import Foundation
   6
   7 var MalValPrintReadably = true
   8
   9 func with_print_readably<T>(print_readably: Bool, fn: () -> T) -> T {
  10     let old = MalValPrintReadably
  11     MalValPrintReadably = print_readably
  12     let result = fn()
  13     MalValPrintReadably = old
  14     return result
  15 }
  16
  17 func pr_str(m: MalVal, _ print_readably: Bool = MalValPrintReadably) -> String {
  18     return with_print_readably(print_readably) {
  19         if is_string(m) {
  20             return print_readably ? escape(m.description) : m.description
  21         }
  22         if is_keyword(m) {
  23             return ":\(m.description)"
  24         }
  25         return m.description
  26     }
  27 }