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Document visitors and formatters

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This commit is contained in:
vitaut 2016-04-21 07:31:32 -07:00
parent 9ae2ac2fb7
commit c7d9d79ad2
1 changed files with 16 additions and 12 deletions
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28
cppformat/format.h
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@ -1390,13 +1390,13 @@ class ArgList {
To use `~fmt::ArgVisitor` define a subclass that implements some or all of the
visit methods with the same signatures as the methods in `~fmt::ArgVisitor`,
for example, `visit_int(int)`.
for example, `~fmt::ArgVisitor::visit_int()`.
Pass the subclass as the *Impl* template parameter. Then calling
`~fmt::ArgVisitor::visit` for some argument will dispatch to a visit method
specific to the argument type. For example, if the argument type is
``double`` then `visit_double(double)` method of a subclass will be called.
If the subclass doesn't contain a method with this signature, then
a corresponding method of `~fmt::ArgVisitor` will be called.
``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass
will be called. If the subclass doesn't contain a method with this signature,
then a corresponding method of `~fmt::ArgVisitor` will be called.
**Example**::
@ -1450,7 +1450,7 @@ class ArgVisitor {
return FMT_DISPATCH(visit_any_int(value));
}
/** Visits an argument of any integer type. **/
/** Visits an argument of any integral type. **/
template <typename T>
Result visit_any_int(T) {
return FMT_DISPATCH(visit_unhandled_arg());
@ -1498,9 +1498,12 @@ class ArgVisitor {
}
/**
\rst
Visits an argument dispatching to the appropriate visit method based on
the argument type. For example, if the argument type is ``double`` then
`visit_double(double)` method of the ``Impl`` class will be called.
the `~fmt::ArgVisitor::visit_double()` method of the *Impl* class will be
called.
\endrst
*/
Result visit(const Arg &arg) {
switch (arg.type) {
@ -1763,7 +1766,8 @@ namespace internal {
template <typename Char>
class ArgMap {
private:
typedef std::vector<std::pair<fmt::BasicStringRef<Char>, internal::Arg> > MapType;
typedef std::vector<
std::pair<fmt::BasicStringRef<Char>, internal::Arg> > MapType;
typedef typename MapType::value_type Pair;
MapType map_;
@ -1954,14 +1958,14 @@ class PrintfFormatter : private FormatterBase {
To use `~fmt::BasicArgFormatter` define a subclass that implements some or
all of the visit methods with the same signatures as the methods in
`~fmt::ArgVisitor`, for example, `visit_int(int)`.
`~fmt::ArgVisitor`, for example, `~fmt::ArgVisitor::visit_int()`.
Pass the subclass as the *Impl* template parameter. When a formatting
function processes an argument, it will dispatch to a visit method
specific to the argument type. For example, if the argument type is
``double`` then `visit_double(double)` method of a subclass will be called.
If the subclass doesn't contain a method with this signature, then
a corresponding method of `~fmt::BasicArgFormatter` or its superclass will be
called.
``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass
will be called. If the subclass doesn't contain a method with this signature,
then a corresponding method of `~fmt::BasicArgFormatter` or its superclass
will be called.
**Example**::