54 lines
3.4 KiB
Plaintext
54 lines
3.4 KiB
Plaintext
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<pre style="font-family:courier;font-size:10pt">
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<a name="l1"></a><span class=cF5> PreProcessor</span><span class=cF0>
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<a name="l2"></a>
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<a name="l3"></a>There is no separate preprocessor pass. The parser front-end calls </span><a href="/src/Compiler/Lex.HC#l441"><span class=cF4>Lex</span></a><span class=cF0>() which
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<a name="l4"></a>has the preprocessor built-in. The compiler looks ahead a token, most of the
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<a name="l5"></a>time, so you might throw an extra semicolon after a directive if it's not taking
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<a name="l6"></a>affect right away.
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<a name="l7"></a>
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<a name="l8"></a>Put an extra semicolon </span><span class=cF2>#exe {Cd("DirName");;}</span><span class=cF0> in case a </span><span class=cF2>#include</span><span class=cF0> follows.
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<a name="l9"></a>
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<a name="l10"></a></span><span class=cF2>#include ""</span><span class=cF0> There is no angle bracket <> form of this directive.
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<a name="l11"></a></span><span class=cF2>#exe {}</span><span class=cF0> Will execute code at compile-time and can be used to insert code
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<a name="l12"></a>into the stream being compiled using </span><a href="/src/Compiler/CMisc.HC#l68"><span class=cF4>StreamPrint</span></a><span class=cF0>().
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<a name="l13"></a></span><span class=cF2>#define</span><span class=cF0> Define string const
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<a name="l14"></a></span><span class=cF2>#assert</span><span class=cF0> Print a warning during compilation if an expression is not true.
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<a name="l15"></a></span><span class=cF2>#if</span><span class=cF0> Include code if an expresion is true.
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<a name="l16"></a></span><span class=cF2>#else
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<a name="l17"></a>#endif
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<a name="l18"></a>#ifdef,#ifndef </span><span class=cF0>Include code if a sym is defined.
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<a name="l19"></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.
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<a name="l20"></a></span><span class=cF2>defined()</span><span class=cF0> Is a function that can be used in expressions.
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<a name="l21"></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="/src/Doc/HelpSystem.DD.HTML#l1"><span class=cF4>Help System</span></a><span class=cF0>.
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<a name="l22"></a>
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<a name="l23"></a>See </span><a href="/src/Compiler/Lex.HC#l710"><span class=cF4>PreProcessor</span></a><span class=cF0>.
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</span></pre></body>
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</html>
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