ZealOS/docs/Doc/PreProcessor.DD.html
TomAwezome dbf8647d59 Fixed non-writable drive throw on F5 and Ctrl-S.
Added top & right borders to RawDr.
Improved spacing in some debug and compiler reporting.
Fixed RawPutChar and EdLite tab width.
Fixed Ui missing '0x' prefix syntax highlighter bug.
Added 32BitPaint demo.
2021-07-14 18:38:02 -04:00

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<pre style="font-family:monospace;font-size:12pt">
<a name="l1"></a><span class=cF5> PreProcessor</span><span class=cF0>
<a name="l2"></a>
<a name="l3"></a>There is no separate preprocessor pass. The parser front-end calls </span><a href="https://tomawezome.github.io/ZealOS/Compiler/Lex.CC.html#l529"><span class=cF4>Lex</span></a><span class=cF0>() which has the preprocessor built-in. The compiler
<a name="l4"></a>looks ahead a token, most of the time, so you might throw an extra semicolon after a directive if it's not taking affect right
<a name="l5"></a>away.
<a name="l6"></a>
<a name="l7"></a>Put an extra semicolon </span><span class=cF2>#exe {Cd(&quot;DirName&quot;);;}</span><span class=cF0> in case a </span><span class=cF2>#include</span><span class=cF0> follows.
<a name="l8"></a>
<a name="l9"></a></span><span class=cF2>#include &quot;&quot;</span><span class=cF0> There is no angle bracket &lt;&gt; form of this directive.
<a name="l10"></a></span><span class=cF2>#exe {}</span><span class=cF0> Will execute code at compile-time and can be used to insert code into the stream being compiled using </span><span class=cF4>
<a name="l11"></a></span><a href="https://tomawezome.github.io/ZealOS/Compiler/CMisc.CC.html#l71"><span class=cF4>StreamPrint</span></a><span class=cF0>().
<a name="l12"></a></span><span class=cF2>#define</span><span class=cF0> Define string const
<a name="l13"></a></span><span class=cF2>#assert</span><span class=cF0> Print a warning during compilation if an expression is not true.
<a name="l14"></a></span><span class=cF2>#if</span><span class=cF0> Include code if an expresion is true.
<a name="l15"></a></span><span class=cF2>#else
<a name="l16"></a>#endif
<a name="l17"></a>#ifdef,#ifndef </span><span class=cF0>Include code if a sym is defined.
<a name="l18"></a></span><span class=cF2>#ifaot,#ifjit </span><span class=cF0>Include code if in </span><span class=cF2>AOT</span><span class=cF0> compiler mode.
<a name="l19"></a></span><span class=cF2>defined()</span><span class=cF0> Is a function that can be used in expressions.
<a name="l20"></a></span><span class=cF2>#help_index</span><span class=cF0>, </span><span class=cF2>#help_file</span><span class=cF0> See </span><a href="https://tomawezome.github.io/ZealOS/Doc/HelpSystem.DD.html#l1"><span class=cF4>Help System</span></a><span class=cF0>.
<a name="l21"></a>
<a name="l22"></a>See </span><a href="https://tomawezome.github.io/ZealOS/Compiler/Lex.CC.html#l855"><span class=cF4>PreProcessor</span></a><span class=cF0>.
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