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Monthly Downloads: 62
Programming language: Haskell
License: MIT License
Tags: Language    
Latest version: v0.7.0.1

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README

config-value

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This package implements a simple, layout-based value definition language used for supplying configuration values to various applications.

Before starting to use config-value, you probably want to read the documentation for config-schema to see the user-friendly way to wrap this library.

Live Demo

The config-value and config-schema packages are available in a live demo.

Example

-- Line comments until newline
layout:
  based:
    configuration:
      {} -- empty section

    inline-maps: {key1: value1, key2: value2}

    sections:
     "glguy"

    {- Block comments
       {- nested comments -}
       "O'caml style {- strings in comments"
       so you can comment out otherwise valid
       portions of your config
    -}
    atoms:       yes

    decimal:     -1234
    hexadecimal: 0x1234
    octal:       0o1234
    binary:      0b1010

    floats:      [1e2, 0x3p-5, 24.48]
    underscores: 1_000_000

lists:
   * sections: in-lists
     next-section: still-in-list
   * [ "inline", "lists" ]
   * * "nestable"
     * "layout"
     * "lists"
   * 3

unicode: "standard Haskell format strings (1 ≤ 2)x2228(2 ≤ 3)"

multiline: "haskell style\
           \string gaps"

Format

The language supports: Strings, Atoms, Integers, Lists, Nested Sections.

Sections are layout based. The contents of a section must be indented further than the section heading. The whitespace between a section heading and its colon is not significant. Section names must start with a letter and may contain letters, numbers, dashes (-), underscores (_), and periods (.).

Lists are either layout based with * prefixes or inline surrounded by [ and ] delimited by ,

Strings are surrounded by " and use Haskell-style escapes.

Numbers support decimal, hexadecimal (0x), octal (0o), and binary (0b).

Atoms follow the same lexical rule as section heading.