Code clean up: use range-style for loops wherever possible

Remove variables obsoleted by commit 4f24617.

4 files changed, 6 insertions, 17 deletions

diff --git a/examples/pdf-filter-tokens.cc b/examples/pdf-filter-tokens.cc
index 3d4bad8b..ccacc8c2 100644
--- a/examples/pdf-filter-tokens.cc
+++ b/examples/pdf-filter-tokens.cc
@@ -191,9 +191,7 @@ main(int argc, char* argv[])
     try {
         QPDF pdf;
         pdf.processFile(infilename);
-        std::vector<QPDFPageObjectHelper> pages =
-            QPDFPageDocumentHelper(pdf).getAllPages();
-        for (auto& page: pages) {
+        for (auto& page: QPDFPageDocumentHelper(pdf).getAllPages()) {
             // Attach two token filters to each page of this file.
             // When the file is written, or when the pages' contents
             // are retrieved in any other way, the filters will be
diff --git a/examples/pdf-invert-images.cc b/examples/pdf-invert-images.cc
index b784c8e3..2c9a88e7 100644
--- a/examples/pdf-invert-images.cc
+++ b/examples/pdf-invert-images.cc
@@ -129,12 +129,9 @@ main(int argc, char* argv[])
         auto p = std::shared_ptr<QPDFObjectHandle::StreamDataProvider>(inv);
 
         // For each page...
-        std::vector<QPDFPageObjectHelper> pages =
-            QPDFPageDocumentHelper(qpdf).getAllPages();
-        for (auto& page: pages) {
+        for (auto& page: QPDFPageDocumentHelper(qpdf).getAllPages()) {
             // Get all images on the page.
-            std::map<std::string, QPDFObjectHandle> images = page.getImages();
-            for (auto& iter: images) {
+            for (auto& iter: page.getImages()) {
                 QPDFObjectHandle& image = iter.second;
                 QPDFObjectHandle image_dict = image.getDict();
                 QPDFObjectHandle color_space = image_dict.getKey("/ColorSpace");
diff --git a/examples/pdf-overlay-page.cc b/examples/pdf-overlay-page.cc
index f9603d9c..594f139e 100644
--- a/examples/pdf-overlay-page.cc
+++ b/examples/pdf-overlay-page.cc
@@ -40,9 +40,7 @@ stamp_page(char const* infile, char const* stampfile, char const* outfile)
     QPDFObjectHandle stamp_fo = inpdf.copyForeignObject(foreign_fo);
 
     // For each page...
-    std::vector<QPDFPageObjectHelper> pages =
-        QPDFPageDocumentHelper(inpdf).getAllPages();
-    for (auto& ph: pages) {
+    for (auto& ph: QPDFPageDocumentHelper(inpdf).getAllPages()) {
         // Find a unique resource name for the new form XObject
         QPDFObjectHandle resources = ph.getAttribute("/Resources", true);
         int min_suffix = 1;
diff --git a/examples/pdf-set-form-values.cc b/examples/pdf-set-form-values.cc
index c28149ad..cc328cf3 100644
--- a/examples/pdf-set-form-values.cc
+++ b/examples/pdf-set-form-values.cc
@@ -50,15 +50,11 @@ main(int argc, char* argv[])
         // illustrates how we can map from annotations to fields.
 
         QPDFAcroFormDocumentHelper afdh(qpdf);
-        QPDFPageDocumentHelper pdh(qpdf);
-        std::vector<QPDFPageObjectHelper> pages = pdh.getAllPages();
-        for (auto const& page: pages) {
+        for (auto const& page: QPDFPageDocumentHelper(qpdf).getAllPages()) {
             // Get all widget annotations for each page. Widget
             // annotations are the ones that contain the details of
             // what's in a form field.
-            std::vector<QPDFAnnotationObjectHelper> annotations =
-                afdh.getWidgetAnnotationsForPage(page);
-            for (auto& annot: annotations) {
+            for (auto& annot: afdh.getWidgetAnnotationsForPage(page)) {
                 // For each annotation, find its associated field. If
                 // it's a text field, set its value.
                 QPDFFormFieldObjectHelper ffh =