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error handling docs

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This commit is contained in:
djowel
2018-03-08 11:07:48 +08:00
parent 130e6395d7
commit 54d0167bc8
6 changed files with 546 additions and 182 deletions
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16
example/x3/error_handling.cpp
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@@ -82,21 +82,15 @@ namespace client
///////////////////////////////////////////////////////////////////////
// Our error handler
///////////////////////////////////////////////////////////////////////
template <typename Iterator>
using error_handler = x3::error_handler<Iterator>;
// tag used to get our error handler from the context
using error_handler_tag = x3::error_handler_tag;
struct error_handler_base
struct error_handler
{
template <typename Iterator, typename Exception, typename Context>
x3::error_handler_result on_error(
Iterator& first, Iterator const& last
, Exception const& x, Context const& context)
{
auto& error_handler = x3::get<x3::error_handler_tag>(context).get();
std::string message = "Error! Expecting: " + x.which() + " here:";
auto& error_handler = x3::get<error_handler_tag>(context).get();
error_handler(x.where(), message);
return x3::error_handler_result::fail;
}
@@ -136,7 +130,7 @@ namespace client
struct quoted_string_class {};
struct person_class : x3::annotate_on_success {};
struct employee_class : error_handler_base, x3::annotate_on_success {};
struct employee_class : error_handler, x3::annotate_on_success {};
}
}
@@ -158,8 +152,8 @@ void parse(std::string const& input)
iterator_type const end = input.end();
using boost::spirit::x3::with;
using error_handler_type = client::parser::error_handler<iterator_type>;
using client::parser::error_handler_tag;
using boost::spirit::x3::error_handler_tag;
using error_handler_type = boost::spirit::x3::error_handler<iterator_type>;
// Our error handler
error_handler_type error_handler(iter, end, std::cerr);