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68 lines
2.9 KiB
HTML
68 lines
2.9 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML>
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<HEAD>
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<META NAME="generator" CONTENT="http://txt2tags.sf.net">
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<TITLE> Predefined functions for concrete syntax</TITLE>
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</HEAD><BODY BGCOLOR="white" TEXT="black">
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<P ALIGN="center"><CENTER><H1> Predefined functions for concrete syntax</H1>
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<FONT SIZE="4">
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<I>Last update: 2006-09-01 16:37:08 CEST</I><BR>
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</FONT></CENTER>
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<P></P>
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<HR NOSHADE SIZE=1>
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<P></P>
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<P></P>
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<HR NOSHADE SIZE=1>
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<P></P>
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<P>
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Produced by
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gfdoc - a rudimentary GF document generator.
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(c) Aarne Ranta (<A HREF="mailto:aarne@cs.chalmers.se">aarne@cs.chalmers.se</A>) 2002 under GNU GPL.
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</P>
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<P>
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The definitions of these constants are hard-coded in GF, and defined
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in <A HREF="../src/GF/Grammar/AppPredefined.hs">AppPredefined.hs</A>. Applying
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them to run-time variables leads to compiler errors that are often
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only detected at the code generation time.
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</P>
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<PRE>
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resource Predef = {
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</PRE>
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<P></P>
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<P>
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This type of booleans is for internal use only.
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</P>
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<PRE>
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param PBool = PTrue | PFalse ;
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oper Error : Type = variants {} ; -- the empty type
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oper Int : Type = variants {} ; -- the type of integers
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oper Ints : Int -> Type = variants {} ; -- the type of integers from 0 to n
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oper error : Str -> Error = variants {} ; -- forms error message
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oper length : Tok -> Int = variants {} ; -- length of string
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oper drop : Int -> Tok -> Tok = variants {} ; -- drop prefix of length
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oper take : Int -> Tok -> Tok = variants {} ; -- take prefix of length
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oper tk : Int -> Tok -> Tok = variants {} ; -- drop suffix of length
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oper dp : Int -> Tok -> Tok = variants {} ; -- take suffix of length
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oper eqInt : Int -> Int -> PBool = variants {} ; -- test if equal integers
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oper lessInt: Int -> Int -> PBool = variants {} ; -- test order of integers
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oper plus : Int -> Int -> Int = variants {} ; -- add integers
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oper eqStr : Tok -> Tok -> PBool = variants {} ; -- test if equal strings
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oper occur : Tok -> Tok -> PBool = variants {} ; -- test if occurs as substring
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oper occurs : Tok -> Tok -> PBool = variants {} ; -- test if any char occurs
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oper show : (P : Type) -> P -> Tok = variants {} ; -- convert param to string
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oper read : (P : Type) -> Tok -> P = variants {} ; -- convert string to param
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oper toStr : (L : Type) -> L -> Str = variants {} ; -- find the "first" string
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oper mapStr : (L : Type) -> (Str -> Str) -> L -> L = variants {} ;
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-- map all strings in a data structure; experimental ---
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} ;
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</PRE>
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<P></P>
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<!-- html code generated by txt2tags 2.3 (http://txt2tags.sf.net) -->
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<!-- cmdline: txt2tags -thtml -\-toc ../prelude/Predef.txt -->
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</BODY></HTML>
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