Revision 6542fdbd8d000fc5b18eb3f396b5d18f1ffd6521 authored by Paul Russo on 13 June 2008, 20:34:11 UTC, committed by Paul Russo on 13 June 2008, 20:34:11 UTC
"int" so that NULL translates to a constant integral type. The C++ standard has this to say in section 4.10 Pointer conversions [conv.ptr]: A "null pointer constant" is an integral constant expression (5.19) rvalue of integer type that evaluates to zero. This is a problem in a function overloading situation like this: void f(double); void f(char*); int main() { for (int i = 1; i < 10; ++i) { f(i); } } The rule in section 4.10 on null pointer constants and the rules in Chapter 13 Overloading, make f(char*) a non-viable function for overloading purposes because i is not a "integral constant expression". However given: #define POGO 0 then in the same loop a call written: f(POGO); is ambiguous since both of the functions are viable (because POGO is substituted with 0, which is an integral constant expression). In cint "#define int MyType" is implemented as a variable definition using the special type macroInt$. So we need to make that type const so that overloading works correctly. Note that this is all a gross hack to paper over the fact that cint does not have a proper preprocessor. -- Paul Russo and Philippe Canal git-svn-id: http://root.cern.ch/svn/root/trunk@24273 27541ba8-7e3a-0410-8455-c3a389f83636
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cont | ||
eve | ||
fft | ||
fit | ||
foam | ||
geom | ||
gl | ||
graphics | ||
graphs | ||
gui | ||
hist | ||
image | ||
io | ||
math | ||
matrix | ||
mlp | ||
net | ||
physics | ||
proof | ||
pyroot | ||
pythia | ||
quadp | ||
ruby | ||
spectrum | ||
splot | ||
sql | ||
thread | ||
tree | ||
unuran | ||
xml | ||
MyTasks.cxx | -rw-r--r-- | 6.1 KB |
README | -rw-r--r-- | 1.9 KB |
benchmarks.C | -rw-r--r-- | 2.1 KB |
demos.C | -rw-r--r-- | 2.7 KB |
demoshelp.C | -rw-r--r-- | 1.3 KB |
gallery.root | -rw-r--r-- | 387.6 KB |
geant3tasks.C | -rw-r--r-- | 5.9 KB |
hsimple.C | -rw-r--r-- | 3.6 KB |
htmlex.C | -rw-r--r-- | 3.1 KB |
regexp.C | -rw-r--r-- | 5.4 KB |
regexp_pme.C | -rw-r--r-- | 3.3 KB |
rootalias.C | -rw-r--r-- | 1.8 KB |
rootenv.C | -rw-r--r-- | 3.5 KB |
rootlogoff.C | -rw-r--r-- | 59 bytes |
rootlogon.C | -rw-r--r-- | 377 bytes |
rootmarks.C | -rw-r--r-- | 4.9 KB |
tasks.C | -rw-r--r-- | 1.7 KB |
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