From 276b09f0040719774f07e080d5d0e4a0c998c842 Mon Sep 17 00:00:00 2001
From: bolero-MURAKAMI <bolero.murakami@gmail.com>
Date: Tue, 29 Mar 2016 01:35:57 +0900
Subject: [PATCH] fix csv example

---
 example/csv/main.cpp | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/example/csv/main.cpp b/example/csv/main.cpp
index d061fd6e..6ce81b1d 100644
--- a/example/csv/main.cpp
+++ b/example/csv/main.cpp
@@ -6,6 +6,7 @@
   file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 =============================================================================*/
 
+#include <stdexcept>
 #include <sprout/workaround/std/cstddef.hpp>
 #include <sprout/array.hpp>
 #include <sprout/sub_array.hpp>
@@ -48,6 +49,7 @@ parse_csv(String const& src, csv_parser_settings<typename String::value_type> se
 	sprout::array_sub_t<sprout::array_sub_t<ResultString, N>, L> result = {};
 	result.window(0, 1);
 	result.back().window(0, 0);
+	bool same_escape = settings.quote() == settings.escape();
 	auto delimiters = sprout::make_string(settings.delimiter(), value_type('\r'), value_type('\n'));
 	auto first = sprout::begin(src), last = sprout::end(src);
 	while (first != last) {
@@ -57,18 +59,26 @@ parse_csv(String const& src, csv_parser_settings<typename String::value_type> se
 			auto end_quote = sprout::find(first, last, settings.quote());
 			while (true) {
 				if (end_quote == last) {
-					throw 0;
+					throw std::runtime_error("end quote not found");
 				}
 				auto next = sprout::next(end_quote);
+				if (!same_escape && first != end_quote) {
+					auto prev = sprout::prev(end_quote);
+					if (*prev == settings.escape()) {
+						// escaped quote
+						end_quote = sprout::find(next, last, settings.quote());
+						continue;
+					}
+				}
 				if (next != last) {
-					if (*next == settings.escape()) {
+					if (*next == settings.quote()) {
 						// escaped quote
 						++next;
 						end_quote = sprout::find(next, last, settings.quote());
 						continue;
 					}
 					if (!sprout::any_of_equal(delimiters.begin(), delimiters.end(), *next)) {
-						throw 0;
+						throw std::runtime_error("invalid quote");
 					}
 					if (*next == value_type('\r') && sprout::next(next) != last && *sprout::next(next) == value_type('\n')) {
 						++next;
@@ -109,17 +119,18 @@ parse_csv(String const& src, csv_parser_settings<typename String::value_type> se
 
 int main() {
 	using namespace sprout::udl;
+	constexpr auto settings = csv_parser_settings<char>(',', '\"', '\\');
 	constexpr auto src = R"(
 (no quoted),a,b,c
 (quoted),"d","e","f"
-(escaped),"""g""","""h""","""i"""
+(escaped),"""g""","\"h\"","""i"""
 (comma),"j,k","l,m","n,o"
 (new line),"p
 q","r
 s","t
 u"
 )"_sv;
-	constexpr auto result = parse_csv<16, 16>(src);
+	constexpr auto result = parse_csv<16, 16>(src, settings);
 	for (auto const& field : result) {
 		for (auto const& elem : field) {
 			std::cout