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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - "Implicit int" is still available for function parameters in C99"
href="https://llvm.org/bugs/show_bug.cgi?id=25110">25110</a>
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<th>Summary</th>
<td>"Implicit int" is still available for function parameters in C99
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Frontend
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>mimomorin@gmail.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>A legacy "implicit int" feature of was removed in C99.
But Clang still allows it for function parameters (e.g. `void f(x) {}`)
and produces no warnings unless `-pedantic` is specified.
Clang should produce warnings (at least).
For reference, here is a list of "implicit int" warnings/errors in C99 mode:
void f(x) {};
[no warning!]
void g(x);
[error]
a parameter list without types is only allowed in a function definition
x;
[warning]
type specifier missing, defaults to 'int' [-Wimplicit-int]
(gcc produces warnings for all the three cases.)</pre>
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