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<title>Data/Textual/Encoding.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE FunctionalDependencies #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE MultiParamTypeClasses #-}</span>
<a name="line-3"></a><span class='hs-comment'>{-# LANGUAGE TypeFamilies #-}</span>
<a name="line-4"></a><span class='hs-comment'>{-# LANGUAGE UndecidableInstances #-}</span>
<a name="line-5"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Textual</span><span class='hs-varop'>.</span><span class='hs-conid'>Encoding</span> <span class='hs-keyword'>where</span>
<a name="line-6"></a>
<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>S</span>
<a name="line-8"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>L</span>
<a name="line-9"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Sequences</span>
<a name="line-10"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>T</span>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</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'>Encoding</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>T</span>
<a name="line-12"></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'>Encoding</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span> <span class='hs-layout'>(</span><span class='hs-varid'>lenientDecode</span><span class='hs-layout'>)</span>
<a name="line-13"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</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-keyword'>as</span> <span class='hs-conid'>TL</span>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</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'>Encoding</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>TL</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Word</span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</span><span class='hs-layout'>)</span>
<a name="line-16"></a>
<a name="line-17"></a><a name="Utf8"></a><span class='hs-comment'>-- | Textual data which can be encoded to and decoded from UTF8.</span>
<a name="line-18"></a><a name="Utf8"></a><span class='hs-keyword'>class</span> <span class='hs-layout'>(</span><span class='hs-conid'>Textual</span> <span class='hs-varid'>textual</span><span class='hs-layout'>,</span> <span class='hs-conid'>IsSequence</span> <span class='hs-varid'>binary</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Utf8</span> <span class='hs-varid'>textual</span> <span class='hs-varid'>binary</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>textual</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>binary</span><span class='hs-layout'>,</span> <span class='hs-varid'>binary</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>textual</span> <span class='hs-keyword'>where</span>
<a name="line-19"></a> <span class='hs-varid'>encodeUtf8</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>textual</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>binary</span>
<a name="line-20"></a> <span class='hs-comment'>-- | Note that this function is required to be pure. In the case of</span>
<a name="line-21"></a> <span class='hs-comment'>-- a decoding error, Unicode replacement characters must be used.</span>
<a name="line-22"></a> <span class='hs-varid'>decodeUtf8</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>binary</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>textual</span>
<a name="line-23"></a><a name="instance%20Utf8%20%5bc%5d%20%5bw%5d"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-keyglyph'>~</span> <span class='hs-conid'>Char</span><span class='hs-layout'>,</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>~</span> <span class='hs-conid'>Word8</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Utf8</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>w</span><span class='hs-keyglyph'>]</span> <span class='hs-keyword'>where</span>
<a name="line-24"></a> <span class='hs-varid'>encodeUtf8</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varop'>.</span> <span class='hs-conid'>TL</span><span class='hs-varop'>.</span><span class='hs-varid'>encodeUtf8</span> <span class='hs-varop'>.</span> <span class='hs-conid'>TL</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span>
<a name="line-25"></a> <span class='hs-varid'>decodeUtf8</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TL</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varop'>.</span> <span class='hs-conid'>TL</span><span class='hs-varop'>.</span><span class='hs-varid'>decodeUtf8With</span> <span class='hs-varid'>lenientDecode</span> <span class='hs-varop'>.</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span>
<a name="line-26"></a><a name="instance%20Utf8%20T.Text%20S.ByteString"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Utf8</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyword'>where</span>
<a name="line-27"></a> <span class='hs-varid'>encodeUtf8</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>encodeUtf8</span>
<a name="line-28"></a> <span class='hs-varid'>decodeUtf8</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>decodeUtf8With</span> <span class='hs-varid'>lenientDecode</span>
<a name="line-29"></a><a name="instance%20Utf8%20TL.Text%20L.ByteString"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Utf8</span> <span class='hs-conid'>TL</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyword'>where</span>
<a name="line-30"></a> <span class='hs-varid'>encodeUtf8</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TL</span><span class='hs-varop'>.</span><span class='hs-varid'>encodeUtf8</span>
<a name="line-31"></a> <span class='hs-varid'>decodeUtf8</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TL</span><span class='hs-varop'>.</span><span class='hs-varid'>decodeUtf8With</span> <span class='hs-varid'>lenientDecode</span>
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