ToolChain: Add a language field

* Make sure this field can not change during the lifetime of the
  toolchain
* Save/restore it, default to Cxx if no language is set in the
  toolchain.xml file

Change-Id: Ie79321f9913521b087cb8a735660cf1e1faeec3b
Reviewed-by: Tim Jenssen <tim.jenssen@theqtcompany.com>

src/plugins/projectexplorer/toolchain.cpp

@@ -39,6 +39,7 @@
 static const char ID_KEY[] = "ProjectExplorer.ToolChain.Id";
 static const char DISPLAY_NAME_KEY[] = "ProjectExplorer.ToolChain.DisplayName";
 static const char AUTODETECT_KEY[] = "ProjectExplorer.ToolChain.Autodetect";
+static const char LANGUAGE_KEY[] = "ProjectExplorer.ToolChain.Language";
 
 namespace ProjectExplorer {
 namespace Internal {
@@ -62,8 +63,10 @@ public:
     }
 
     QByteArray m_id;
+    QSet<ToolChain::Language> m_supportedLanguages;
     mutable QString m_displayName;
     Core::Id m_typeId;
+    ToolChain::Language m_language = ToolChain::Language::None;
     Detection m_detection;
 };
 
@@ -79,16 +82,27 @@ public:
 
 ToolChain::ToolChain(Core::Id typeId, Detection d) :
     d(new Internal::ToolChainPrivate(typeId, d))
-{ }
+{
+}
 
 ToolChain::ToolChain(const ToolChain &other) :
     d(new Internal::ToolChainPrivate(other.d->m_typeId, ManualDetection))
 {
+    d->m_language = other.d->m_language;
+
     // leave the autodetection bit at false.
     d->m_displayName = QCoreApplication::translate("ProjectExplorer::ToolChain", "Clone of %1")
             .arg(other.displayName());
 }
 
+void ToolChain::setLanguage(const ToolChain::Language &l)
+{
+    QTC_ASSERT(d->m_language == Language::None, return);
+    QTC_ASSERT(l != Language::None, return);
+
+    d->m_language = l;
+}
+
 ToolChain::~ToolChain()
 {
     delete d;
@@ -135,6 +149,30 @@ Core::Id ToolChain::typeId() const
     return d->m_typeId;
 }
 
+const QSet<ToolChain::Language> &ToolChain::allLanguages()
+{
+    static QSet<Language> languages({ Language::C, Language::Cxx });
+    return languages;
+}
+
+QString ToolChain::languageDisplayName(Language language)
+{
+    switch (language) {
+    case Language::None:
+        return QCoreApplication::translate("ProjectExplorer::ToolChain", "None");
+    case Language::C:
+        return QCoreApplication::translate("ProjectExplorer::ToolChain", "C");
+    case Language::Cxx:
+        return QCoreApplication::translate("ProjectExplorer::ToolChain", "C++");
+    };
+    return QString();
+}
+
+ToolChain::Language ToolChain::language() const
+{
+    return d->m_language;
+}
+
 bool ToolChain::canClone() const
 {
     return true;
@@ -162,6 +200,7 @@ QVariantMap ToolChain::toMap() const
     result.insert(QLatin1String(ID_KEY), idToSave);
     result.insert(QLatin1String(DISPLAY_NAME_KEY), displayName());
     result.insert(QLatin1String(AUTODETECT_KEY), isAutoDetected());
+    result.insert(QLatin1String(LANGUAGE_KEY), static_cast<int>(language()));
 
     return result;
 }
@@ -199,6 +238,13 @@ bool ToolChain::fromMap(const QVariantMap &data)
     const bool autoDetect = data.value(QLatin1String(AUTODETECT_KEY), false).toBool();
     d->m_detection = autoDetect ? AutoDetectionFromSettings : ManualDetection;
 
+    bool ok;
+    d->m_language
+            = static_cast<Language>(data.value(QLatin1String(LANGUAGE_KEY),
+                                               static_cast<int>(Language::Cxx)).toInt(&ok));
+    if (!ok)
+        d->m_language = Language::Cxx;
+
     return true;
 }
 

src/plugins/projectexplorer/toolchain.h

@@ -33,6 +33,7 @@
 #include <utils/fileutils.h>
 
 #include <QObject>
+#include <QSet>
 #include <QString>
 #include <QVariantMap>
 
@@ -110,6 +111,16 @@ public:
     virtual void addToEnvironment(Utils::Environment &env) const = 0;
     virtual QString makeCommand(const Utils::Environment &env) const = 0;
 
+    enum class Language {
+        None = 0,
+        C,
+        Cxx
+    };
+    static const QSet<Language>& allLanguages();
+    static QString languageDisplayName(Language language);
+
+    Language language() const;
+
     virtual Utils::FileName compilerCommand() const = 0;
     virtual IOutputParser *outputParser() const = 0;
 
@@ -124,10 +135,13 @@ public:
     virtual QVariantMap toMap() const;
     virtual QList<Task> validateKit(const Kit *k) const;
 
+    void setLanguage(const Language &l);
+
 protected:
     explicit ToolChain(Core::Id typeId, Detection d);
     explicit ToolChain(const ToolChain &);
 
+
     void toolChainUpdated();
 
     // Make sure to call this function when deriving!
@@ -168,4 +182,9 @@ private:
     QString m_displayName;
 };
 
+inline uint qHash(const ProjectExplorer::ToolChain::Language &l, uint seed = 0)
+{
+    return QT_PREPEND_NAMESPACE(qHash)(static_cast<int>(l), seed);
+}
+
 } // namespace ProjectExplorer