76 lines
3.1 KiB
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76 lines
3.1 KiB
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<title>M2 Checks - Debugging with GDB</title>
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<a name="M2-Checks"></a>
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Next: <a rel="next" accesskey="n" href="M2-Scope.html#M2-Scope">M2 Scope</a>,
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Previous: <a rel="previous" accesskey="p" href="Deviations.html#Deviations">Deviations</a>,
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Up: <a rel="up" accesskey="u" href="Modula_002d2.html#Modula_002d2">Modula-2</a>
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<h5 class="subsubsection">15.4.9.7 Modula-2 Type and Range Checks</h5>
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<p><a name="index-Modula_002d2-checks-1050"></a>
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<blockquote>
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<em>Warning:</em> in this release, <span class="sc">gdb</span> does not yet perform type or
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range checking.
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</blockquote>
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<!-- FIXME remove warning when type/range checks added -->
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<p><span class="sc">gdb</span> considers two Modula-2 variables type equivalent if:
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<ul>
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<li>They are of types that have been declared equivalent via a <code>TYPE
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</code><var>t1</var><code> = </code><var>t2</var> statement
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<li>They have been declared on the same line. (Note: This is true of the
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<span class="sc">gnu</span> Modula-2 compiler, but it may not be true of other compilers.)
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</ul>
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<p>As long as type checking is enabled, any attempt to combine variables
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whose types are not equivalent is an error.
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<p>Range checking is done on all mathematical operations, assignment, array
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index bounds, and all built-in functions and procedures.
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