refactor(HandlebarsGenerator): toString customization is virtual function

Author: alandefreitas

src/lib/Gen/adoc/AdocGenerator.cpp

@@ -18,17 +18,19 @@ namespace adoc {
 
 AdocGenerator::
 AdocGenerator()
-    : hbs::HandlebarsGenerator("Asciidoc", "adoc", [](
-        hbs::HandlebarsCorpus const& c,
-        doc::Node const& I) -> std::string
-    {
-        std::string s;
-        DocVisitor visitor(c, s);
-        doc::visit(I, visitor);
-        return s;
-    })
+    : hbs::HandlebarsGenerator("Asciidoc", "adoc")
 {}
 
+std::string
+AdocGenerator::
+toString(hbs::HandlebarsCorpus const& c, doc::Node const& I) const
+{
+    std::string s;
+    DocVisitor visitor(c, s);
+    doc::visit(I, visitor);
+    return s;
+}
+
 } // adoc
 
 std::unique_ptr<Generator>

src/lib/Gen/adoc/AdocGenerator.hpp

@@ -26,6 +26,11 @@ class AdocGenerator
 {
 public:
     AdocGenerator();
+
+    std::string
+    toString(
+        hbs::HandlebarsCorpus const&,
+        doc::Node const&) const override;
 };
 
 } // adoc

src/lib/Gen/hbs/Builder.hpp

@@ -55,10 +55,14 @@ class Builder
     Expected<std::string> renderSinglePageHeader();
     Expected<std::string> renderSinglePageFooter();
 
+    /** Render the contents for a symbol.
+     */
     template<class T>
     Expected<std::string>
     operator()(T const&);
 
+    /** Render the contents for an overload set.
+     */
     Expected<std::string>
     operator()(OverloadSet const&);
 };

src/lib/Gen/hbs/HandlebarsGenerator.cpp

@@ -92,7 +92,12 @@ build(
 
     Options options = loadOptions(fileExtension(), corpus.config);
     HandlebarsCorpus domCorpus(
-        corpus, std::move(options), fileExtension(), toStringFn);
+        corpus,
+        std::move(options),
+        fileExtension(),
+        [this](HandlebarsCorpus const& c, doc::Node const& n) {
+            return this->toString(c, n);
+        });
     auto ex = createExecutors(domCorpus);
     if (!ex)
     {
@@ -119,7 +124,12 @@ buildOne(
     auto options = loadOptions(fileExtension(), corpus.config);
 
     HandlebarsCorpus domCorpus(
-        corpus, std::move(options), fileExtension(), toStringFn);
+        corpus,
+        std::move(options),
+        fileExtension(),
+        [this](HandlebarsCorpus const& c, doc::Node const& n) {
+            return this->toString(c, n);
+        });
     auto ex = createExecutors(domCorpus);
     if (!ex)
     {

src/lib/Gen/hbs/HandlebarsGenerator.hpp

@@ -28,17 +28,13 @@ class HandlebarsGenerator
 {
     std::string displayName_;
     std::string fileExtension_;
-    using JavadocToStringFn = std::function<std::string(HandlebarsCorpus const&, doc::Node const&)>;
-    JavadocToStringFn toStringFn;
 
 public:
     HandlebarsGenerator(
         std::string_view displayName,
-        std::string_view fileExtension,
-        JavadocToStringFn toStringFn)
+        std::string_view fileExtension)
         : displayName_(displayName)
         , fileExtension_(fileExtension)
-        , toStringFn(std::move(toStringFn))
     {}
 
     std::string_view
@@ -68,6 +64,15 @@ class HandlebarsGenerator
     buildOne(
         std::ostream& os,
         Corpus const& corpus) const override;
+
+    /** Convert a Javadoc node to a string.
+    */
+    virtual
+    std::string
+    toString(HandlebarsCorpus const&, doc::Node const&) const
+    {
+        return {};
+    }
 };
 
 } // hbs

src/lib/Gen/html/HTMLGenerator.cpp

@@ -18,17 +18,19 @@ namespace html {
 
 HTMLGenerator::
 HTMLGenerator()
-    : hbs::HandlebarsGenerator("HTML", "html", [](
-        hbs::HandlebarsCorpus const& c,
-        doc::Node const& I) -> std::string
-    {
-        std::string s;
-        DocVisitor visitor(c, s);
-        doc::visit(I, visitor);
-        return s;
-    })
+    : hbs::HandlebarsGenerator("HTML", "html")
 {}
 
+std::string
+HTMLGenerator::
+toString(hbs::HandlebarsCorpus const& c, doc::Node const& I) const
+{
+    std::string s;
+    DocVisitor visitor(c, s);
+    doc::visit(I, visitor);
+    return s;
+}
+
 } // html
 
 //------------------------------------------------

src/lib/Gen/html/HTMLGenerator.hpp

@@ -26,6 +26,11 @@ class HTMLGenerator
 {
 public:
     HTMLGenerator();
+
+    std::string
+    toString(
+        hbs::HandlebarsCorpus const&,
+        doc::Node const&) const override;
 };
 
 } // html