Use IsEmpty() or .empty() to check if a container is empty. NFC.

Most found by clang-tidy.

src/platform/entrycli.cpp

@@ -312,7 +312,7 @@ static bool RunCommand(const std::vector<std::string> args) {
         return false;
     }
 
-    if(inputFiles.size() == 0) {
+    if(inputFiles.empty()) {
         fprintf(stderr, "At least one input file must be specified.\n");
         return false;
     }

src/platform/guigtk.cpp

@@ -1292,7 +1292,8 @@ public:
 
     void FilterChanged() {
         std::string extension = GetExtension();
-        if(extension == "") return;
+        if(extension.empty())
+            return;
 
         Platform::Path path = GetFilename();
         SetCurrentName(path.WithExtension(extension).FileName());

src/platform/platform.cpp

@@ -203,7 +203,7 @@ static void FindPrefix(const std::string &raw, size_t *pos) {
         }
     }
 #else
-    if(raw.size() >= 1 && raw[0] == '/') {
+    if(!raw.empty() && raw[0] == '/') {
         *pos = 1;
     }
 #endif

src/polygon.cpp

@@ -681,7 +681,8 @@ void SPolygon::MakeEdgesInto(SEdgeList *el) const {
 }
 
 Vector SPolygon::ComputeNormal() const {
-    if(l.n < 1) return Vector::From(0, 0, 0);
+    if(l.IsEmpty())
+        return Vector::From(0, 0, 0);
     return (l[0]).ComputeNormal();
 }
 

src/render/gl3shader.cpp

@@ -395,7 +395,7 @@ GLuint Generate(const std::vector<double> &pattern) {
         int dashI = 0;
         double dashT = 0.0;
         for(int i = 0; i < size; i++) {
-            if(pattern.size() == 0) {
+            if(pattern.empty()) {
                 textureData[i] = EncodeLengthAsFloat(0.0);
                 continue;
             }

src/resource.cpp

@@ -1147,7 +1147,7 @@ PluralExpr::Token PluralExpr::Lex() {
 }
 
 PluralExpr::Token PluralExpr::PopToken() {
-    ssassert(stack.size() > 0, "Expected a non-empty stack");
+    ssassert(!stack.empty(), "Expected a non-empty stack");
     Token t = stack.back();
     stack.pop_back();
     return t;
@@ -1406,7 +1406,7 @@ void GettextParser::Parse() {
             }
         }
 
-        if(key.ident == "") {
+        if(key.ident.empty()) {
             ssassert(msgstrs.size() == 1,
                      "Expected exactly one header msgstr");
             ParseHeader(msgstrs[0]);

src/srf/curve.cpp

@@ -476,7 +476,7 @@ void SBezierLoop::MakePwlInto(SContour *sc, double chordTol) const {
 }
 
 bool SBezierLoop::IsClosed() const {
-    if(l.n < 1) return false;
+    if(l.IsEmpty()) return false;
     Vector s = l.First()->Start(),
            f = l.Last()->Finish();
     return s.Equals(f);
@@ -497,7 +497,7 @@ SBezierLoopSet SBezierLoopSet::From(SBezierList *sbl, SPolygon *poly,
     SBezierLoopSet ret = {};
 
     *allClosed = true;
-    while(sbl->l.n > 0) {
+    while(!sbl->l.IsEmpty()) {
         bool thisClosed;
         SBezierLoop loop;
         loop = SBezierLoop::FromCurves(sbl, &thisClosed, errorAt);

src/toolbar.cpp

@@ -175,7 +175,7 @@ bool GraphicsWindow::ToolbarDrawOrHitTest(int mx, int my, UiCanvas *canvas,
 
     bool leftpos = true;
     for(ToolIcon &icon : Toolbar) {
-        if(icon.name == "") { // spacer
+        if(icon.name.empty()) { // spacer
             if(!leftpos) {
                 leftpos = true;
                 y -= 32;