[LyX/master] Use range-based loops

[Yuriy Skalko]

commit e97daf9e13f450fd1828b944c0db94d0efff52c9
Author: Yuriy Skalko <yuriy.skalko at gmail.com>
Date:   Fri Nov 27 11:09:16 2020 +0200

    Use range-based loops
---
 src/graphics/GraphicsCache.cpp |   23 ++++++-----------------
 1 files changed, 6 insertions(+), 17 deletions(-)

diff --git a/src/graphics/GraphicsCache.cpp b/src/graphics/GraphicsCache.cpp
index dbf9caf..5f89c56 100644
--- a/src/graphics/GraphicsCache.cpp
+++ b/src/graphics/GraphicsCache.cpp
@@ -70,18 +70,10 @@ vector<string> const & Cache::loadableFormats() const
 	if (!fmts.empty())
 		return fmts;
 
-	// The formats recognised by LyX
-	Formats::const_iterator begin = theFormats().begin();
-	Formats::const_iterator end   = theFormats().end();
-
-	// The formats natively loadable.
-	vector<string> nformat = frontend::loadableImageFormats();
-
-	vector<string>::const_iterator it = nformat.begin();
-	for (; it != nformat.end(); ++it) {
-		for (Formats::const_iterator fit = begin; fit != end; ++fit) {
-			if (fit->extension() == *it) {
-				fmts.push_back(fit->name());
+	for (string const & native_extension : frontend::loadableImageFormats()) {
+		for (Format const & format : theFormats()) {
+			if (format.extension() == native_extension) {
+				fmts.push_back(format.name());
 				break;
 			}
 		}
@@ -89,11 +81,8 @@ vector<string> const & Cache::loadableFormats() const
 
 	if (lyxerr.debugging()) {
 		LYXERR(Debug::GRAPHICS, "LyX recognises the following image formats:");
-
-		vector<string>::const_iterator fbegin = fmts.begin();
-		vector<string>::const_iterator fend = fmts.end();
-		for (vector<string>::const_iterator fit = fbegin; fit != fend; ++fit) {
-			LYXERR(Debug::GRAPHICS, *fit << ',');
+		for (string const & format : fmts) {
+			LYXERR(Debug::GRAPHICS, format << ',');
 		}
 	}