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diff --git a/share/doc/gdb/M2-Operators.html b/share/doc/gdb/M2-Operators.html new file mode 100644 index 0000000..a9a26da --- /dev/null +++ b/share/doc/gdb/M2-Operators.html @@ -0,0 +1,214 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1988-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with the +Invariant Sections being "Free Software" and "Free Software Needs +Free Documentation", with the Front-Cover Texts being "A GNU Manual," +and with the Back-Cover Texts as in (a) below. + +(a) The FSF's Back-Cover Text is: "You are free to copy and modify +this GNU Manual. Buying copies from GNU Press supports the FSF in +developing GNU and promoting software freedom." --> +<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>Debugging with GDB: M2 Operators</title> + +<meta name="description" content="Debugging with GDB: M2 Operators"> +<meta name="keywords" content="Debugging with GDB: M2 Operators"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<link href="index.html#Top" rel="start" title="Top"> +<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="Modula_002d2.html#Modula_002d2" rel="up" title="Modula-2"> +<link href="Built_002dIn-Func_002fProc.html#Built_002dIn-Func_002fProc" rel="next" title="Built-In Func/Proc"> +<link href="Modula_002d2.html#Modula_002d2" rel="previous" title="Modula-2"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.smallquotation {font-size: smaller} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.indentedblock {margin-left: 3.2em} +div.lisp {margin-left: 3.2em} +div.smalldisplay {margin-left: 3.2em} +div.smallexample {margin-left: 3.2em} +div.smallindentedblock {margin-left: 3.2em; font-size: smaller} +div.smalllisp {margin-left: 3.2em} +kbd {font-style:oblique} +pre.display {font-family: inherit} +pre.format {font-family: inherit} +pre.menu-comment {font-family: serif} +pre.menu-preformatted {font-family: serif} +pre.smalldisplay {font-family: inherit; font-size: smaller} +pre.smallexample {font-size: smaller} +pre.smallformat {font-family: inherit; font-size: smaller} +pre.smalllisp {font-size: smaller} +span.nocodebreak {white-space:nowrap} +span.nolinebreak {white-space:nowrap} +span.roman {font-family:serif; font-weight:normal} +span.sansserif {font-family:sans-serif; font-weight:normal} +ul.no-bullet {list-style: none} +--> +</style> + + +</head> + +<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="M2-Operators"></a> +<div class="header"> +<p> +Next: <a href="Built_002dIn-Func_002fProc.html#Built_002dIn-Func_002fProc" accesskey="n" rel="next">Built-In Func/Proc</a>, Up: <a href="Modula_002d2.html#Modula_002d2" accesskey="u" rel="up">Modula-2</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<a name="Operators"></a> +<h4 class="subsubsection">15.4.9.1 Operators</h4> +<a name="index-Modula_002d2-operators"></a> + +<p>Operators must be defined on values of specific types. For instance, +<code>+</code> is defined on numbers, but not on structures. Operators are +often defined on groups of types. For the purposes of Modula-2, the +following definitions hold: +</p> +<ul> +<li> <em>Integral types</em> consist of <code>INTEGER</code>, <code>CARDINAL</code>, and +their subranges. + +</li><li> <em>Character types</em> consist of <code>CHAR</code> and its subranges. + +</li><li> <em>Floating-point types</em> consist of <code>REAL</code>. + +</li><li> <em>Pointer types</em> consist of anything declared as <code>POINTER TO +<var>type</var></code>. + +</li><li> <em>Scalar types</em> consist of all of the above. + +</li><li> <em>Set types</em> consist of <code>SET</code> and <code>BITSET</code> types. + +</li><li> <em>Boolean types</em> consist of <code>BOOLEAN</code>. +</li></ul> + +<p>The following operators are supported, and appear in order of +increasing precedence: +</p> +<dl compact="compact"> +<dt><code>,</code></dt> +<dd><p>Function argument or array index separator. +</p> +</dd> +<dt><code>:=</code></dt> +<dd><p>Assignment. The value of <var>var</var> <code>:=</code> <var>value</var> is +<var>value</var>. +</p> +</dd> +<dt><code><<span class="roman">, </span>></code></dt> +<dd><p>Less than, greater than on integral, floating-point, or enumerated +types. +</p> +</dd> +<dt><code><=<span class="roman">, </span>>=</code></dt> +<dd><p>Less than or equal to, greater than or equal to +on integral, floating-point and enumerated types, or set inclusion on +set types. Same precedence as <code><</code>. +</p> +</dd> +<dt><code>=<span class="roman">, </span><><span class="roman">, </span>#</code></dt> +<dd><p>Equality and two ways of expressing inequality, valid on scalar types. +Same precedence as <code><</code>. In <small>GDB</small> scripts, only <code><></code> is +available for inequality, since <code>#</code> conflicts with the script +comment character. +</p> +</dd> +<dt><code>IN</code></dt> +<dd><p>Set membership. Defined on set types and the types of their members. +Same precedence as <code><</code>. +</p> +</dd> +<dt><code>OR</code></dt> +<dd><p>Boolean disjunction. Defined on boolean types. +</p> +</dd> +<dt><code>AND<span class="roman">, </span>&</code></dt> +<dd><p>Boolean conjunction. Defined on boolean types. +</p> +</dd> +<dt><code>@</code></dt> +<dd><p>The <small>GDB</small> “artificial array” operator (see <a href="Expressions.html#Expressions">Expressions</a>). +</p> +</dd> +<dt><code>+<span class="roman">, </span>-</code></dt> +<dd><p>Addition and subtraction on integral and floating-point types, or union +and difference on set types. +</p> +</dd> +<dt><code>*</code></dt> +<dd><p>Multiplication on integral and floating-point types, or set intersection +on set types. +</p> +</dd> +<dt><code>/</code></dt> +<dd><p>Division on floating-point types, or symmetric set difference on set +types. Same precedence as <code>*</code>. +</p> +</dd> +<dt><code>DIV<span class="roman">, </span>MOD</code></dt> +<dd><p>Integer division and remainder. Defined on integral types. Same +precedence as <code>*</code>. +</p> +</dd> +<dt><code>-</code></dt> +<dd><p>Negative. Defined on <code>INTEGER</code> and <code>REAL</code> data. +</p> +</dd> +<dt><code>^</code></dt> +<dd><p>Pointer dereferencing. Defined on pointer types. +</p> +</dd> +<dt><code>NOT</code></dt> +<dd><p>Boolean negation. Defined on boolean types. Same precedence as +<code>^</code>. +</p> +</dd> +<dt><code>.</code></dt> +<dd><p><code>RECORD</code> field selector. Defined on <code>RECORD</code> data. Same +precedence as <code>^</code>. +</p> +</dd> +<dt><code>[]</code></dt> +<dd><p>Array indexing. Defined on <code>ARRAY</code> data. Same precedence as <code>^</code>. +</p> +</dd> +<dt><code>()</code></dt> +<dd><p>Procedure argument list. Defined on <code>PROCEDURE</code> objects. Same precedence +as <code>^</code>. +</p> +</dd> +<dt><code>::<span class="roman">, </span>.</code></dt> +<dd><p><small>GDB</small> and Modula-2 scope operators. +</p></dd> +</dl> + +<blockquote> +<p><em>Warning:</em> Set expressions and their operations are not yet supported, so <small>GDB</small> +treats the use of the operator <code>IN</code>, or the use of operators +<code>+</code>, <code>-</code>, <code>*</code>, <code>/</code>, <code>=</code>, , <code><></code>, <code>#</code>, +<code><=</code>, and <code>>=</code> on sets as an error. +</p></blockquote> + + +<hr> +<div class="header"> +<p> +Next: <a href="Built_002dIn-Func_002fProc.html#Built_002dIn-Func_002fProc" accesskey="n" rel="next">Built-In Func/Proc</a>, Up: <a href="Modula_002d2.html#Modula_002d2" accesskey="u" rel="up">Modula-2</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p> +</div> + + + +</body> +</html> |