# 053: Show Char においてエスケープ未対応
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- issued: 2020-05-03
- 分類： 分類：C 改善項目
- status: Open

## 概要

instance Show Char の実装において、エスケープの処理が未実装

$$<pre>{
instance Show Char where
  -- todo: escape
  show c = ['\'', c, '\'']
  showList cs = (:) '"' . showl cs
    where -- showl "" = (:) '"'
          showl [] = (:) '"'
          -- showl ('"':cs) = (++) "\\\"" . showl cs
          showl (c:cs) = showLitChar c . showl cs

-- todo: should convert to printable characters
showLitChar c = (++) [c]
$$}