Safe Haskell	Safe-Inferred
Language	Haskell2010

Lsql.Csv.Core.BlockOps

Description

This module contains the Block definition representing an LSQL command block and functions for getting a specific type of block from a list of Block.

Synopsis

data Block
- = Select [Arg]
- | If Arg
- | Sort [Arg]
- | By [Arg]
getSelects :: [Block] -> [[Arg]]
getIf :: [Block] -> Arg
getSort :: [Block] -> [Arg]
getBy :: [Block] -> [Arg]

Documentation

data Block Source #

This data structure represents a command block.

Constructors

Select [Arg]
If Arg
Sort [Arg]
By [Arg]

getSelects :: [Block] -> [[Arg]] Source #

Returns all select blocks.

getIf :: [Block] -> Arg Source #

Makes conjunction of all if blocks (if none, simple True is returned) and returns it.

getSort :: [Block] -> [Arg] Source #

Finds a sort block, if exists, and returns it. If there is none, [] is returned. If there is more than one sort block, fails.

getBy :: [Block] -> [Arg] Source #

Finds a by block, if exists, and returns it. If there is none, [] is returned. If there is more than one by block, fails.