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104 lines
8.4 KiB
104 lines
8.4 KiB
<HTML><HEAD><TITLE>Microsoft.FSharp.Compatibility.OCaml.Lexing</TITLE><link rel="stylesheet" type="text/css"href="../msdn.css"></link></HEAD><BODY>
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<h1>[<a href='../namespaces.html'>Home</a>] Module <a href='Microsoft.FSharp.Compatibility.html'>Microsoft.FSharp.Compatibility</a>.<a href='Microsoft.FSharp.Compatibility.OCaml.html'>OCaml</a>.Lexing </h1><br>
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</dd>
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<dt></dt><dd>
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<table>
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<tr valign='top'><td><summary>
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Lexing: ML-like lexing support
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This file maintains rough compatibility for lexbuffers used by some ML
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laxer generators. The lexbuf carries an associated pair of positions.
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Beware that only the "cnum" (absolute character number) field is automatically
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updated as each lexeme is matched. Upon each successful match the prior end
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position is transferred to be the start position and a new start position
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is allocated with an updated pos_cnum field.
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</summary>
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<dt><h3>Type Definitions</h3></dt><dd>
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<table width="100%%">
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<tr><th width=30%>Type</th><th>Description</th></tr>
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<tr valign="top"><td>type <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a></td><td><summary>
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ASCII LexBuffers
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The type "lexbuf" is opaque, but has an internal position information field
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that can be updated by setting "lexbuf.EndPos", for example if you wish
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to update the other fields in that position data before or during
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lexing. You will need to do this if you wish to maintain accurate
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line-count information. If you do this and wish to maintain strict
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cross-compiling compatibility with OCamlLex and other tools you may need code
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to conditionally use lexbuf_set_curr_p when compiling F# code.
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</summary> Note: an abbreviation for <tt><a href='Microsoft.FSharp.Text.Lexing.type_LexBuffer-1.html'>LexBuffer</a><<a href='../FSharp.Core/Microsoft.FSharp.Core.type__byte.html'>byte</a>></tt></td></tr>
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<tr valign="top"><td>type <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__position.html'>position</a></td><td> Note: an abbreviation for <tt><a href='Microsoft.FSharp.Text.Lexing.type_Position.html'>Position</a></tt></td></tr>
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</table>
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</dd>
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<dt><h3>Values</h3></dt><dd>
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<table width="100%%">
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<tr><th width=60%>Value</th><th>Description</th></tr>
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<tr valign="top"><td><pre>val flush_input : <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a> -> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__unit.html'>unit</a></pre></td><td><summary>
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Remove all input, though don't discard the except the current lexeme
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</summary></td></tr>
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<tr valign="top"><td><pre>val from_binary_reader : <a href='http://msdn2.microsoft.com/en-us/library/System.IO.BinaryReader.aspx'>BinaryReader</a> -> <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a></pre></td><td><summary>
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Fuel a lexer using the given BinaryReader.
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</summary></td></tr>
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<tr valign="top"><td><pre>val from_bytearray : <a href='../FSharp.Core/Microsoft.FSharp.Core.type__byte.html'>byte</a> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__[]-1.html'>[]</a> -> <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a></pre></td><td><summary>
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Fuel a lexer from an array of bytes
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</summary></td></tr>
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<tr valign="top"><td><pre>val from_channel : <a href='http://msdn2.microsoft.com/en-us/library/System.IO.TextReader.aspx'>TextReader</a> -> <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a></pre></td><td><summary>
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Fuel a lexer using the given in_channel. The bytes are read using Pervasives.input.
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If the in_channel is a textual channel the bytes are
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presented to the lexer by decoding the characters using System.Text.Encoding.ASCII.
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</summary></td></tr>
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<tr valign="top"><td><pre>val from_function : (<a href='../FSharp.Core/Microsoft.FSharp.Core.type__byte.html'>byte</a> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__[]-1.html'>[]</a> -> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__int.html'>int</a> -> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__int.html'>int</a>) -> <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a></pre></td><td><summary>
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Fuel a lexer from function that fills an array of bytes up to the given length, returning the
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number of bytes filled.
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</summary></td></tr>
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<tr valign="top"><td><pre>val from_string : <a href='../FSharp.Core/Microsoft.FSharp.Core.type__string.html'>string</a> -> <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a></pre></td><td><summary>
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Fuel a lexer from a string, converted to ascii using <tt>System.Text.Encoding.ASCII.GetBytes</tt>
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</summary></td></tr>
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<tr valign="top"><td><pre>val from_text_reader : <a href='http://msdn2.microsoft.com/en-us/library/System.Text.Encoding.aspx'>Encoding</a> -> <a href='http://msdn2.microsoft.com/en-us/library/System.IO.TextReader.aspx'>TextReader</a> -> <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a></pre></td><td><summary>
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Fuel a lexer using the given TextReader or StreamReader.
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The characters read are decoded to bytes using the given encoding (e.g. System.Text.Encoding.ASCII)
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and the bytes presented to the lexer. The encoding used to decode the characters
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is associated with the expectations of the lexer (e.g. a lexer may be constructed to accept only
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ASCII or pseudo-UTF8 bytes) and will typically be different to
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the encoding used to decode the file.
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</summary></td></tr>
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<tr valign="top"><td><pre>val lexeme : <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a> -> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__string.html'>string</a></pre></td><td><summary>
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Return the matched string
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</summary></td></tr>
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<tr valign="top"><td><pre>val lexeme_bytes : <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a> -> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__byte.html'>byte</a> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__array-1.html'>array</a></pre></td><td><summary>
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Return the bytes for the matched string
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</summary></td></tr>
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<tr valign="top"><td><pre>val lexeme_char : <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a> -> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__int.html'>int</a> -> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__char.html'>char</a></pre></td><td><summary>
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Return a character from the matched string, innterpreting the bytes using an ASCII encoding
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</summary></td></tr>
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<tr valign="top"><td><pre>val lexeme_end : <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a> -> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__int.html'>int</a></pre></td><td><summary>
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Return absolute positions into the entire stream of characters
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</summary></td></tr>
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<tr valign="top"><td><pre>val lexeme_end_p : <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a> -> <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__position.html'>position</a></pre></td><td><summary>
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Return the positions stored in the lexbuf for the matched string
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</summary></td></tr>
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<tr valign="top"><td><pre>val lexeme_start : <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a> -> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__int.html'>int</a></pre></td><td><summary>
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Return absolute positions into the entire stream of characters
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</summary></td></tr>
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<tr valign="top"><td><pre>val lexeme_start_p : <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a> -> <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__position.html'>position</a></pre></td><td><summary>
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Return the positions stored in the lexbuf for the matched string
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</summary></td></tr>
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<tr valign="top"><td><pre>val lexeme_utf8 : <a href='Microsoft.FSharp.Compatibility.OCaml.Lexing.type__lexbuf.html'>lexbuf</a> -> <a href='../FSharp.Core/Microsoft.FSharp.Core.type__string.html'>string</a></pre></td><td><summary>
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Return the matched string interpreting the bytes using the given Unicode text encoding
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</summary></td></tr>
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</table>
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</dd>
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</td></tr>
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<tr valign='top'><td>
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<dt><h3>See Also</h3></dt><dd>
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<a href="Microsoft.FSharp.Compatibility.OCaml.html">Microsoft.FSharp.Compatibility.OCaml</a> </dd>
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</td></tr>
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</table>
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</dd>
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</dl>
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<br /> <br/><p><i>Documentation for assembly FSharp.PowerPack, version 1.9.6.16, generated using <a href='http://research.microsoft.com/fsharp/'>F# Programming Language</a> version 1.9.6.16</i></p>
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