Added white space escape sequence

exasol · Oct 10, 2024 · 0268a87 · 0268a87
1 parent f03dae4
commit 0268a87
Show file tree

Hide file tree

Showing 2 changed files with 279 additions and 236 deletions.
diff --git a/exaudfclient/base/script_options_parser/ctpg/script_option_lines_ctpg.cc b/exaudfclient/base/script_options_parser/ctpg/script_option_lines_ctpg.cc
@@ -68,11 +68,30 @@ const auto convert_escape_seq(std::string_view escape_seq) {
 }
 
 
+const auto convert_whitespace_escape_seq(std::string_view escape_seq) {
+    std::string retVal;
+    if (escape_seq == R"_(\ )_") {
+        retVal = " ";
+    } else if (escape_seq == R"_(\t)_") {
+        retVal = "\t";
+    } else if (escape_seq == R"_(\f)_") {
+        retVal = "\f";
+    } else if (escape_seq == R"_(\v)_") {
+        retVal = "\v";
+    } else {
+        throw std::runtime_error(std::string("Internal parser error: Unexpected white space escape sequence " + std::string(escape_seq)));
+    }
+
+    return retVal;
+}
+
+
 
 constexpr char alpha_numeric_pattern[] = R"_([0-9a-zA-Z_]+)_";
 constexpr char not_semicolon_pattern[] = R"_([^;])_";
 constexpr char whitespaces_pattern[] = R"_([ \x09\x0c\x0b]+)_";
 constexpr char escape_pattern[] = R"_(\\;|\\n|\\r)_";
+constexpr char whitespace_escape_pattern[] = R"_(\\ |\\t|\\f|\\v)_";
 
 
 
@@ -82,6 +101,7 @@ constexpr regex_term<alpha_numeric_pattern> alpha_numeric("alpha_numeric");
 constexpr regex_term<not_semicolon_pattern> not_semicolon("not_semicolon");
 constexpr regex_term<whitespaces_pattern> whitespaces("whitespace");
 constexpr regex_term<escape_pattern> escape_seq("escape_seq");
+constexpr regex_term<whitespace_escape_pattern> whitespace_escape_seq("escape_seq");
 
 constexpr nterm<options_type> text("text");
 constexpr nterm<options_type> options("options");
@@ -92,7 +112,7 @@ constexpr nterm<std::string> option_value("option_value");
 
 constexpr parser option_parser(
     text,
-    terms(start_option_token, escape_seq, whitespaces, end_option_token, alpha_numeric, not_semicolon),
+    terms(start_option_token, escape_seq, whitespace_escape_seq, whitespaces, end_option_token, alpha_numeric, not_semicolon),
     nterms(text, option_value, options, option_element, rest),
     rules(
         text(rest)
@@ -113,12 +133,14 @@ constexpr parser option_parser(
             >= [](auto o) { return std::string(o.get_value()); },
         option_value(not_semicolon)
             >= [](auto o) { return std::string(o.get_value()); },
-        option_value(whitespaces)
-            >= [](auto o) { return std::string(o.get_value()); },
+        option_value(whitespace_escape_seq)
+            >= [](auto o) { return std::string(convert_whitespace_escape_seq(o.get_value())); },
         option_value(escape_seq)
             >= [](auto es) { return convert_escape_seq(es.get_value()); },
         option_value(option_value, not_semicolon)
             >= [](auto&& ov, auto v) { return std::move(ov.append(v.get_value())); },
+        option_value(option_value, whitespace_escape_seq)
+            >= [](auto&& ov, auto es) { return std::move(ov.append(es.get_value())); },
         option_value(option_value, escape_seq)
             >= [](auto&& ov, auto es) { return std::move(ov.append(convert_escape_seq(es.get_value()))); },
         option_value(option_value, start_option_token)
@@ -133,6 +155,8 @@ constexpr parser option_parser(
             >= [](auto r) { return 0;},
         rest(escape_seq)
             >= [](auto r) { return 0;},
+        rest(whitespace_escape_seq)
+            >= [](auto r) { return 0;},
         rest(end_option_token)
             >= [](auto r) { return 0;},
         rest(not_semicolon)
@@ -148,6 +172,8 @@ constexpr parser option_parser(
         rest(rest, start_option_token)
             >= [](auto r, skip) { return 0;},
         rest(rest, escape_seq)
+            >= [](auto r, skip) { return 0;},
+        rest(rest, whitespace_escape_seq)
             >= [](auto r, skip) { return 0;}
     )
 );