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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - explain why a variable is const"
href="http://llvm.org/bugs/show_bug.cgi?id=19139">19139</a>
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<th>Summary</th>
<td>explain why a variable is const
</td>
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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>Linux
</td>
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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
</td>
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>nlewycky@google.com
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
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<p>
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<pre>Clang should explain why a variable is read-only.
nlewycky@ducttape:~$ cat c.cc
const int k = 1;
void f() { k = 0; }
class X {
int i;
const int j = 1;
void f() const { i = 0; }
void g() { j = 0; }
};
nlewycky@ducttape:~$ llvm/Debug+Asserts/bin/clang c.cc -std=c++11
c.cc:2:14: error: read-only variable is not assignable
void f() { k = 0; }
~ ^
c.cc:6:22: error: read-only variable is not assignable
void f() const { i = 0; }
~ ^
c.cc:7:16: error: read-only variable is not assignable
void g() { j = 0; }
~ ^
3 errors generated.
There are const's to point to in each of those cases.</pre>
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