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<title>Data/Text/Lazy/Builder.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE BangPatterns, CPP, Rank2Types #-}</span>
<a name="line-2"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 702</span>
<a name="line-3"></a><span class='hs-comment'>{-# LANGUAGE Trustworthy #-}</span>
<a name="line-4"></a><span class='hs-cpp'>#endif</span>
<a name="line-5"></a>
<a name="line-6"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-7"></a><span class='hs-comment'>-- |</span>
<a name="line-8"></a><span class='hs-comment'>-- Module : Data.Text.Lazy.Builder</span>
<a name="line-9"></a><span class='hs-comment'>-- Copyright : (c) 2013 Bryan O'Sullivan</span>
<a name="line-10"></a><span class='hs-comment'>-- (c) 2010 Johan Tibell</span>
<a name="line-11"></a><span class='hs-comment'>-- License : BSD3-style (see LICENSE)</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- Maintainer : Johan Tibell <johan.tibell@gmail.com></span>
<a name="line-14"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-15"></a><span class='hs-comment'>-- Portability : portable to Hugs and GHC</span>
<a name="line-16"></a><span class='hs-comment'>--</span>
<a name="line-17"></a><span class='hs-comment'>-- Efficient construction of lazy @Text@ values. The principal</span>
<a name="line-18"></a><span class='hs-comment'>-- operations on a @Builder@ are @singleton@, @fromText@, and</span>
<a name="line-19"></a><span class='hs-comment'>-- @fromLazyText@, which construct new builders, and 'mappend', which</span>
<a name="line-20"></a><span class='hs-comment'>-- concatenates two builders.</span>
<a name="line-21"></a><span class='hs-comment'>--</span>
<a name="line-22"></a><span class='hs-comment'>-- To get maximum performance when building lazy @Text@ values using a</span>
<a name="line-23"></a><span class='hs-comment'>-- builder, associate @mappend@ calls to the right. For example,</span>
<a name="line-24"></a><span class='hs-comment'>-- prefer</span>
<a name="line-25"></a><span class='hs-comment'>--</span>
<a name="line-26"></a><span class='hs-comment'>-- > singleton 'a' `mappend` (singleton 'b' `mappend` singleton 'c')</span>
<a name="line-27"></a><span class='hs-comment'>--</span>
<a name="line-28"></a><span class='hs-comment'>-- to</span>
<a name="line-29"></a><span class='hs-comment'>--</span>
<a name="line-30"></a><span class='hs-comment'>-- > singleton 'a' `mappend` singleton 'b' `mappend` singleton 'c'</span>
<a name="line-31"></a><span class='hs-comment'>--</span>
<a name="line-32"></a><span class='hs-comment'>-- as the latter associates @mappend@ to the left. Or, equivalently,</span>
<a name="line-33"></a><span class='hs-comment'>-- prefer</span>
<a name="line-34"></a><span class='hs-comment'>--</span>
<a name="line-35"></a><span class='hs-comment'>-- > singleton 'a' <> singleton 'b' <> singleton 'c'</span>
<a name="line-36"></a><span class='hs-comment'>--</span>
<a name="line-37"></a><span class='hs-comment'>-- since the '<>' from recent versions of 'Data.Monoid' associates</span>
<a name="line-38"></a><span class='hs-comment'>-- to the right.</span>
<a name="line-39"></a>
<a name="line-40"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-41"></a>
<a name="line-42"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>Builder</span>
<a name="line-43"></a> <span class='hs-layout'>(</span> <span class='hs-comment'>-- * The Builder type</span>
<a name="line-44"></a> <span class='hs-conid'>Builder</span>
<a name="line-45"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>toLazyText</span>
<a name="line-46"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>toLazyTextWith</span>
<a name="line-47"></a>
<a name="line-48"></a> <span class='hs-comment'>-- * Constructing Builders</span>
<a name="line-49"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>singleton</span>
<a name="line-50"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromText</span>
<a name="line-51"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromLazyText</span>
<a name="line-52"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromString</span>
<a name="line-53"></a>
<a name="line-54"></a> <span class='hs-comment'>-- * Flushing the buffer state</span>
<a name="line-55"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>flush</span>
<a name="line-56"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-57"></a>
<a name="line-58"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span><span class='hs-varop'>.</span><span class='hs-conid'>Builder</span>
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