Internals: Cleanup find with chars for clang-tidy. No functional change.

include/verilated_vcd_c.cpp

@@ -182,7 +182,7 @@ void VerilatedVcd::openNext(bool incFilename) {
     if (incFilename) {
         // Find _0000.{ext} in filename
         std::string name = m_filename;
-        size_t pos=name.rfind(".");
+        size_t pos = name.rfind('.');
         if (pos>8 && 0==strncmp("_cat",name.c_str()+pos-8,4)
             && isdigit(name.c_str()[pos-4])
             && isdigit(name.c_str()[pos-3])

src/V3Ast.cpp

@@ -158,7 +158,7 @@ string AstNode::vcdName(const string& namein) {
     while ((pos=pretty.find("__DOT__")) != string::npos) {
 	pretty.replace(pos, 7, " ");
     }
-    while ((pos=pretty.find(".")) != string::npos) {
+    while ((pos = pretty.find('.')) != string::npos) {
 	pretty.replace(pos, 1, " ");
     }
     // Now convert escaped special characters, etc

src/V3AstNodes.cpp

@@ -586,7 +586,7 @@ void AstScope::cloneRelink() {
 string AstScope::nameDotless() const {
     string out = shortName();
     string::size_type pos;
-    while ((pos=out.find(".")) != string::npos) {
+    while ((pos = out.find('.')) != string::npos) {
 	out.replace(pos, 1, "__");
     }
     return out;
@@ -613,7 +613,7 @@ string AstScopeName::scopeNameFormatter(AstText* scopeTextp) const {
     if (out.substr(0,7) == "__DOT__") out.replace(0,7,"");
     if (out.substr(0,1) == ".") out.replace(0,1,"");
     string::size_type pos;
-    while ((pos=out.find(".")) != string::npos) {
+    while ((pos = out.find('.')) != string::npos) {
 	out.replace(pos, 1, "__");
     }
     while ((pos=out.find("__DOT__")) != string::npos) {
@@ -1159,7 +1159,7 @@ void AstNodeText::dump(std::ostream& str) {
     this->AstNode::dump(str);
     string out = text();
     string::size_type pos;
-    if ((pos = out.find("\n")) != string::npos) {
+    if ((pos = out.find('\n')) != string::npos) {
 	out.erase(pos,out.length()-pos);
 	out += "...";
     }

src/V3Const.cpp

@@ -2021,7 +2021,7 @@ private:
 	    }
 	}
 	if (!nodep->exprsp()
-	    && nodep->name().find("%") == string::npos
+            && nodep->name().find('%') == string::npos
 	    && !nodep->hidden()) {
 	    // Just a simple constant string - the formatting is pointless
 	    replaceConstString(nodep, nodep->name()); VL_DANGLING(nodep);

src/V3Descope.cpp

@@ -126,7 +126,7 @@ private:
             // Reference to scope of cell directly under this module, can just "cell->"
             string name = scopep->name();
             string::size_type pos;
-            if ((pos = name.rfind(".")) != string::npos) {
+            if ((pos = name.rfind('.')) != string::npos) {
                 name.erase(0,pos+1);
             }
             m_needThis = true;

src/V3EmitCSyms.cpp

@@ -144,7 +144,7 @@ class EmitCSyms : EmitCBaseVisitor {
 			}
 			if (out.substr(0,10) == "TOP__DOT__") out.replace(0,10,"");
 			if (out.substr(0,4) == "TOP.") out.replace(0,4,"");
-			while ((pos=out.find(".")) != string::npos) {
+                        while ((pos = out.find('.')) != string::npos) {
 			    out.replace(pos, 1, "__");
 			}
 			while ((pos=out.find("__DOT__")) != string::npos) {
@@ -409,7 +409,7 @@ void EmitCSyms::emitSymImp() {
 	if (!modp->isTop()) {
 	    string arrow = scopep->name();
 	    string::size_type pos;
-	    while ((pos=arrow.find(".")) != string::npos) {
+            while ((pos = arrow.find('.')) != string::npos) {
 		arrow.replace(pos, 1, "->");
 	    }
 	    if (arrow.substr(0,5) == "TOP->") arrow.replace(0,5,"TOPp->");

src/V3File.cpp

@@ -103,8 +103,8 @@ class V3FileDependImp {
     static string stripQuotes(const string& in) {
 	string pretty = in;
 	string::size_type pos;
-	while ((pos=pretty.find("\"")) != string::npos) pretty.replace(pos, 1, "_");
+        while ((pos = pretty.find('\"')) != string::npos) pretty.replace(pos, 1, "_");
-	while ((pos=pretty.find("\n")) != string::npos) pretty.replace(pos, 1, "_");
+        while ((pos = pretty.find('\n')) != string::npos) pretty.replace(pos, 1, "_");
 	return pretty;
     }
 public:

src/V3FileLine.cpp

@@ -154,7 +154,7 @@ FileLine* FileLine::copyOrSameFileLine() {
 const string FileLine::filebasename() const {
     string name = filename();
     string::size_type pos;
-    if ((pos = name.rfind("/")) != string::npos) {
+    if ((pos = name.rfind('/')) != string::npos) {
 	name.erase(0,pos+1);
     }
     return name;
@@ -163,7 +163,7 @@ const string FileLine::filebasename() const {
 const string FileLine::filebasenameNoExt() const {
     string name = filebasename();
     string::size_type pos;
-    if ((pos = name.find(".")) != string::npos) {
+    if ((pos = name.find('.')) != string::npos) {
 	name = name.substr(0,pos);
     }
     return name;

src/V3Inline.cpp

@@ -409,7 +409,7 @@ private:
                 break;
             }
             // If foo.bar, and foo is an interface, then need to search again for foo
-            string::size_type pos = tryname.rfind(".");
+            string::size_type pos = tryname.rfind('.');
             if (pos == string::npos || pos==0) {
                 break;
             } else {

src/V3LinkDot.cpp

@@ -476,7 +476,7 @@ public:
 	while (leftname != "") {  // foreach dotted part of xref name
 	    string::size_type pos;
 	    string ident;
-	    if ((pos = leftname.find(".")) != string::npos) {
+            if ((pos = leftname.find('.')) != string::npos) {
 		ident = leftname.substr(0,pos);
 		leftname = leftname.substr(pos+1);
 	    } else {
@@ -611,8 +611,8 @@ class LinkDotFindVisitor : public AstNVisitor {
             string v = literal.substr(1, literal.find('"', 1) - 1);
             V3Number n(V3Number::VerilogStringLiteral(), fl, v);
             return new AstConst(fl,n);
-        } else if ((literal.find(".") != string::npos)
+        } else if ((literal.find('.') != string::npos)
-		   || (literal.find("e") != string::npos)) {
+                   || (literal.find('e') != string::npos)) {
 	    // This may be a real
             double v = V3ParseImp::parseDouble(literal.c_str(), literal.length(), &success);
             if (success) {
@@ -750,7 +750,7 @@ class LinkDotFindVisitor : public AstNVisitor {
 	VSymEnt* aboveSymp = m_curSymp;
 	string origname = AstNode::dedotName(nodep->name());
 	string::size_type pos;
-	if ((pos = origname.rfind(".")) != string::npos) {
+        if ((pos = origname.rfind('.')) != string::npos) {
 	    // Flattened, find what CellInline it should live under
 	    string scope = origname.substr(0,pos);
 	    string baddot;

src/V3Options.cpp

@@ -116,14 +116,14 @@ void V3Options::addDefine(const string& defline, bool allowPlus) {
     while (left != "") {
 	string def = left;
 	string::size_type pos;
-	if (allowPlus && ((pos=left.find("+")) != string::npos)) {
+        if (allowPlus && ((pos = left.find('+')) != string::npos)) {
 	    left = left.substr(pos+1);
 	    def.erase(pos);
 	} else {
 	    left = "";
 	}
 	string value;
-	if ((pos=def.find("=")) != string::npos) {
+        if ((pos = def.find('=')) != string::npos) {
 	    value = def.substr(pos+1);
 	    def.erase(pos);
 	}
@@ -138,14 +138,14 @@ void V3Options::addParameter(const string& paramline, bool allowPlus) {
     while (left != "") {
         string param = left;
         string::size_type pos;
-        if (allowPlus && ((pos=left.find("+")) != string::npos)) {
+        if (allowPlus && ((pos = left.find('+')) != string::npos)) {
             left = left.substr(pos+1);
             param.erase(pos);
         } else {
             left = "";
         }
         string value;
-        if ((pos=param.find("=")) != string::npos) {
+        if ((pos = param.find('=')) != string::npos) {
             value = param.substr(pos+1);
             param.erase(pos);
         }
@@ -396,7 +396,7 @@ void V3Options::filePathLookedMsg(FileLine* fl, const string& modname) {
 V3LangCode V3Options::fileLanguage(const string &filename) {
     string ext = V3Os::filenameNonDir(filename);
     string::size_type pos;
-    if ((pos = ext.rfind(".")) != string::npos) {
+    if ((pos = ext.rfind('.')) != string::npos) {
 	ext.erase(0, pos + 1);
         std::map<string,V3LangCode>::iterator it = m_impp->m_langExts.find(ext);
 	if (it != m_impp->m_langExts.end()) {
@@ -620,7 +620,7 @@ void V3Options::parseOptsList(FileLine* fl, const string& optdir, int argc, char
 	    else if ( !strncmp (sw, "+libext+", 8)) {
 		string exts = string(sw+strlen("+libext+"));
 		string::size_type pos;
-		while ((pos=exts.find("+")) != string::npos) {
+                while ((pos = exts.find('+')) != string::npos) {
                     addLibExtV(exts.substr(0,pos));
 		    exts = exts.substr(pos+1);
 		}
@@ -1139,7 +1139,7 @@ void V3Options::parseOptsFile(FileLine* fl, const string& filename, bool rel) {
     // Split into argument list and process
     // Note we don't respect quotes.  It seems most simulators dont.
     // Woez those that expect it; we'll at least complain.
-    if (whole_file.find("\"") != string::npos) {
+    if (whole_file.find('\"') != string::npos) {
 	fl->v3error("Double quotes in -f files cause unspecified behavior.");
     }
 

src/V3Os.cpp

@@ -79,7 +79,7 @@ string V3Os::filenameFromDirBase(const string& dir, const string& basename) {
 
 string V3Os::filenameDir(const string& filename) {
     string::size_type pos;
-    if ((pos = filename.rfind("/")) != string::npos) {
+    if ((pos = filename.rfind('/')) != string::npos) {
 	return filename.substr(0,pos);
     } else {
 	return ".";
@@ -88,7 +88,7 @@ string V3Os::filenameDir(const string& filename) {
 
 string V3Os::filenameNonDir(const string& filename) {
     string::size_type pos;
-    if ((pos = filename.rfind("/")) != string::npos) {
+    if ((pos = filename.rfind('/')) != string::npos) {
 	return filename.substr(pos+1);
     } else {
 	return filename;
@@ -98,7 +98,7 @@ string V3Os::filenameNonDir(const string& filename) {
 string V3Os::filenameNonExt(const string& filename) {
     string base = filenameNonDir(filename);
     string::size_type pos;
-    if ((pos = base.find(".")) != string::npos) {
+    if ((pos = base.find('.')) != string::npos) {
 	base.erase(pos);
     }
     return base;

src/V3PreLex.l

@@ -532,8 +532,8 @@ void V3PreLex::dumpStack() {
 string V3PreLex::cleanDbgStrg(const string& in) {
     string out = in;
     string::size_type pos;
-    while ((pos=out.find("\n")) != string::npos) { out.replace(pos, 1, "\\n"); }
+    while ((pos = out.find('\n')) != string::npos) { out.replace(pos, 1, "\\n"); }
-    while ((pos=out.find("\r")) != string::npos) { out.replace(pos, 1, "\\r"); }
+    while ((pos = out.find('\r')) != string::npos) { out.replace(pos, 1, "\\r"); }
     return out;
 }
 

src/V3PreProc.cpp

@@ -421,9 +421,9 @@ void V3PreProcImp::comment(const string& text) {
 
     string cmd (cp, ep-cp);
     string::size_type pos;
-    while ((pos=cmd.find("\"")) != string::npos)
+    while ((pos = cmd.find('\"')) != string::npos)
 	cmd.replace(pos, 1, " ");
-    while ((pos=cmd.find("\t")) != string::npos)
+    while ((pos = cmd.find('\t')) != string::npos)
 	cmd.replace(pos, 1, " ");
     while ((pos = cmd.find("  ")) != string::npos)
 	cmd.replace(pos, 2, " ");
@@ -853,8 +853,8 @@ void V3PreProcImp::debugToken(int tok, const char* cmtp) {
     if (debug()>=5) {
         string buf = string(yyourtext(), yyourleng());
 	string::size_type pos;
-	while ((pos=buf.find("\n")) != string::npos) { buf.replace(pos, 1, "\\n"); }
+        while ((pos = buf.find('\n')) != string::npos) { buf.replace(pos, 1, "\\n"); }
-	while ((pos=buf.find("\r")) != string::npos) { buf.replace(pos, 1, "\\r"); }
+        while ((pos = buf.find('\r')) != string::npos) { buf.replace(pos, 1, "\\r"); }
         fprintf(stderr, "%d: %s %s %s(%d) dr%d:  <%d>%-10s: %s\n",
                 m_lexp->m_tokFilelinep->lineno(), cmtp, m_off?"of":"on",
                 procStateName(state()), (int)m_states.size(), (int)m_defRefs.size(),
@@ -1214,7 +1214,7 @@ int V3PreProcImp::getStateToken() {
 		// Convert any newlines to spaces, so we don't get a multiline "..." without \ escapes
 		// The spec is silent about this either way; simulators vary
 		string::size_type pos;
-		while ((pos=out.find("\n")) != string::npos) {
+                while ((pos=out.find('\n')) != string::npos) {
 		    out.replace(pos, 1, " ");
 		}
                 unputString(string("\"")+out+"\"");

src/V3StatsReport.cpp

@@ -162,7 +162,7 @@ class StatsReport {
 		{
 		    string commaName = lastName;
 		    string::size_type pos;
-		    if ((pos=commaName.find(",")) != string::npos) {
+                    if ((pos = commaName.find(',')) != string::npos) {
 			commaName.erase(pos);
 		    }
 		    if (lastCommaName != commaName) {

src/verilog.l

@@ -65,7 +65,7 @@ void V3ParseImp::verilatorCmtLint(const char* textp, bool warnOff) {
     while (*sp && !isspace(*sp)) sp++;  while (*sp && isspace(*sp)) sp++;
     string msg = sp;
     string::size_type pos;
-    if ((pos=msg.find("*")) != string::npos) { msg.erase(pos); }
+    if ((pos = msg.find('*')) != string::npos) { msg.erase(pos); }
     if (!(PARSEP->fileline()->warnOff(msg, warnOff))) {
 	if (!PARSEP->optFuture(msg)) {
 	    yyerrorf("Unknown verilator lint message code: %s, in %s",msg.c_str(), textp);