Reland and fix "Fix wide enum names" (#8344) (#8362) (#8365) (#8366)

src/V3Number.cpp

@@ -645,6 +645,41 @@ string V3Number::displayPad(size_t fmtsize, char pad, bool left, const string& i
     return left ? (in + padding) : (padding + in);
 }
 
+string V3Number::displayedEnumName(const AstEnumItem* itemp) {
+    const string name = VIdProtect::protect(itemp->prettyName());
+    return VString::isIdentifier(name) && !std::isdigit(static_cast<unsigned char>(name[0]))
+               ? name
+               : "\\" + name + " ";
+}
+
+string V3Number::displayedEnumName(const AstEnumDType* dtypep) const VL_MT_STABLE {
+    V3Number value{this, dtypep->width()};
+    value.opAssign(*this);
+    for (const AstEnumItem* itemp = dtypep->itemsp(); itemp;
+         itemp = VN_AS(itemp->nextp(), EnumItem)) {
+        const AstConst* const constp = VN_AS(itemp->valuep(), Const);
+        if (!constp->num().isAnyXZ() && value.isCaseEq(constp->num()))
+            return displayedEnumName(itemp);
+    }
+    return "";
+}
+
+string V3Number::displayedEnum(const AstSFormatArg* argp,
+                               const string& vformat) const VL_MT_STABLE {
+    const AstEnumDType* const dtypep = VN_AS(argp->dtypep()->skipRefToEnump(), EnumDType);
+    V3Number value{this, dtypep->width()};
+    value.opAssign(*this);
+    const VFormatAttr numericAttr
+        = dtypep->isSigned() ? VFormatAttr::SIGNED : VFormatAttr::UNSIGNED;
+    const char fmt = std::tolower(vformat.back());
+    if (fmt != 'p' && fmt != 's') return value.displayed(argp, vformat, numericAttr);
+    string name = value.displayedEnumName(dtypep);
+    if (name.empty()) name = value.displayed(argp, fmt == 'p' ? vformat : "%0d", numericAttr);
+    V3Number nameNum{this};
+    nameNum.setString(name);
+    return nameNum.displayed(argp, vformat, VFormatAttr::COMPLEX);
+}
+
 string V3Number::displayed(const AstNode* nodep, const string& vformat,
                            const VFormatAttr& formatAttr) const VL_MT_STABLE {
     return displayed(nodep->fileline(), vformat, formatAttr);