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make hex parser strict (expecting two characters after \x) to avoid greedy parsing of trailing characters as in

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"\xF0\x9F\x8D\xB7abc" ==>  ... + "\xB7" +  "abc" not "\xB7abc"
This commit is contained in:
artemp 2017-03-01 10:27:12 +01:00
parent 87c619cdc2
commit 570126bd76
1 changed files with 3 additions and 3 deletions
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6
include/mapnik/expression_grammar_x3_def.hpp
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@ -63,7 +63,7 @@ namespace mapnik { namespace grammar {
using x3::no_case; using x3::no_case;
using x3::alpha; using x3::alpha;
using x3::alnum; using x3::alnum;
using x3::hex; x3::uint_parser<char, 16, 2, 2> const hex2 {};
auto do_assign = [] (auto const& ctx) auto do_assign = [] (auto const& ctx)
{ {
@ -302,8 +302,8 @@ namespace mapnik { namespace grammar {
x3::rule<class regex_replace_expression, std::pair<std::string,std::string> > const regex_replace_expression("regex replace expression"); x3::rule<class regex_replace_expression, std::pair<std::string,std::string> > const regex_replace_expression("regex replace expression");
// strings // strings
auto const single_quoted_string = x3::rule<class single_quoted_string, std::string> {} = lit('\'') >> no_skip[*(unesc_char | ("\\x" > hex) | (char_ - '\''))] > '\''; auto const single_quoted_string = x3::rule<class single_quoted_string, std::string> {} = lit('\'') >> no_skip[*(unesc_char | ("\\x" > hex2) | (char_ - '\''))] > '\'';
auto const double_quoted_string = x3::rule<class double_quoted_string, std::string> {} = lit('"') >> no_skip[*(unesc_char | ("\\x" > hex) | (char_ - '"'))] > '"'; auto const double_quoted_string = x3::rule<class double_quoted_string, std::string> {} = lit('"') >> no_skip[*(unesc_char | ("\\x" > hex2) | (char_ - '"'))] > '"';
auto const quoted_string = x3::rule<class quoted_string, std::string> {} = single_quoted_string | double_quoted_string; auto const quoted_string = x3::rule<class quoted_string, std::string> {} = single_quoted_string | double_quoted_string;
auto const unquoted_ustring = x3::rule<class ustring, std::string> {} = no_skip[alpha > *alnum] - lit("not"); auto const unquoted_ustring = x3::rule<class ustring, std::string> {} = no_skip[alpha > *alnum] - lit("not");