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Use a more compelling example in the example code for replace().

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Fixes #96.
This commit is contained in:
Zach Laine
2024-02-19 21:50:28 -06:00
parent 0ea1516b6e
commit ca1ad064ff
2 changed files with 30 additions and 11 deletions
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15
doc/tutorial.qbk
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@@ -3145,15 +3145,16 @@ Unlike _split_v_, _replace_v_ does not produce empty subranges, unless
`replacement` is empty.
namespace bp = boost::parser;
auto rng = "XYZaaXYZbaabaXYZXYZ" | bp::replace(bp::lit("XYZ"), "foo");
auto card_number = bp::int_ >> bp::repeat(3)['-' >> bp::int_];
auto rng = "My credit card number is 1234-5678-9012-3456." | bp::replace(card_number, "XXXX-XXXX-XXXX-XXXX");
int count = 0;
// Prints foo aa foo baaba foo foo.
// Prints My credit card number is XXXX-XXXX-XXXX-XXXX.
for (auto subrange : rng) {
std::cout << std::string_view(subrange.begin(), subrange.end() - subrange.begin()) << " ";
std::cout << std::string_view(subrange.begin(), subrange.end() - subrange.begin());
++count;
}
std::cout << "\n";
assert(count == 6);
assert(count == 3);
If the iterator types `Ir` and `Ireplacement` for the `r` and `replacement`
@@ -3168,13 +3169,13 @@ subranges represented by _replace_v_ is easily joined back into a single
range.
namespace bp = boost::parser;
char const str[] = "XYZaaXYZbaabaXYZXYZ";
auto rng = str | bp::replace(bp::lit("XYZ"), "foo") | std::views::join;
auto card_number = bp::int_ >> bp::repeat(3)['-' >> bp::int_];
auto rng = "My credit card number is 1234-5678-9012-3456." | bp::replace(card_number, "XXXX-XXXX-XXXX-XXXX") | std::views::join;
std::string replace_result;
for (auto ch : rng) {
replace_result.push_back(ch);
}
assert(replace_result == "fooaafoobaabafoofoo");
assert(replace_result == "My credit card number is XXXX-XXXX-XXXX-XXXX.");
Note that we could *not* have written `std::string replace_result(r.begin(),
r.end())`. This is ill-formed because the `std::string` range constructor

26
test/replace.cpp
View File

@@ -437,17 +437,35 @@ TEST(replace, join_compat)
TEST(replace, doc_examples)
{
// clang-format off
{
auto rng = "XYZaaXYZbaabaXYZXYZ" | bp::replace(bp::lit("XYZ"), "foo");
namespace bp = boost::parser;
auto card_number = bp::int_ >> bp::repeat(3)['-' >> bp::int_];
auto rng = "My credit card number is 1234-5678-9012-3456." | bp::replace(card_number, "XXXX-XXXX-XXXX-XXXX");
int count = 0;
// Prints foo aa foo baaba foo foo.
// Prints My credit card number is XXXX-XXXX-XXXX-XXXX.
for (auto subrange : rng) {
std::cout << std::string_view(subrange.begin(), subrange.end() - subrange.begin()) << " ";
std::cout << std::string_view(subrange.begin(), subrange.end() - subrange.begin());
++count;
}
std::cout << "\n";
assert(count == 6);
assert(count == 3);
}
#if BOOST_PARSER_USE_CONCEPTS && (!defined(__GNUC__) || 12 <= __GNUC__)
{
namespace bp = boost::parser;
auto card_number = bp::int_ >> bp::repeat(3)['-' >> bp::int_];
auto rng = "My credit card number is 1234-5678-9012-3456." |
bp::replace(card_number, "XXXX-XXXX-XXXX-XXXX") |
std::views::join;
std::string replace_result;
for (auto ch : rng) {
replace_result.push_back(ch);
}
assert(replace_result == "My credit card number is XXXX-XXXX-XXXX-XXXX.");
}
#endif
// clang-format on
}
#endif