From 963db49a8bf5fd372a722bba14f1c83f03be26dd Mon Sep 17 00:00:00 2001
From: Roberto Raggi <roberto.raggi@nokia.com>
Date: Fri, 19 Nov 2010 13:01:39 +0100
Subject: [PATCH] Introduced a simple AST dumper for GLSL.

---
 src/libs/glsl/glsl-lib.pri       |  4 +-
 src/libs/glsl/glslastdump.cpp    | 64 ++++++++++++++++++++++++++++++++
 src/libs/glsl/glslastdump.h      | 57 ++++++++++++++++++++++++++++
 src/libs/glsl/glslastvisitor.cpp |  6 +++
 src/libs/glsl/glslastvisitor.h   |  2 +
 5 files changed, 131 insertions(+), 2 deletions(-)
 create mode 100644 src/libs/glsl/glslastdump.cpp
 create mode 100644 src/libs/glsl/glslastdump.h

diff --git a/src/libs/glsl/glsl-lib.pri b/src/libs/glsl/glsl-lib.pri
index ead8cdd8e4e..c92e158e478 100644
--- a/src/libs/glsl/glsl-lib.pri
+++ b/src/libs/glsl/glsl-lib.pri
@@ -1,8 +1,8 @@
 HEADERS += $$PWD/glsl.h $$PWD/glsllexer.h $$PWD/glslparser.h $$PWD/glslparsertable_p.h $$PWD/glslast.h \
-    $$PWD/glslastvisitor.h $$PWD/glslengine.h $$PWD/glslmemorypool.h
+    $$PWD/glslastvisitor.h $$PWD/glslengine.h $$PWD/glslmemorypool.h glslastdump.h
 SOURCES += $$PWD/glslkeywords.cpp $$PWD/glslparser.cpp $$PWD/glslparsertable.cpp \
     $$PWD/glsllexer.cpp $$PWD/glslast.cpp \
-    $$PWD/glslastvisitor.cpp $$PWD/glslengine.cpp $$PWD/glslmemorypool.cpp
+    $$PWD/glslastvisitor.cpp $$PWD/glslengine.cpp $$PWD/glslmemorypool.cpp glslastdump.cpp
 
 OTHER_FILES = $$PWD/glsl.g \
     $$PWD/specs/grammar.txt
diff --git a/src/libs/glsl/glslastdump.cpp b/src/libs/glsl/glslastdump.cpp
new file mode 100644
index 00000000000..b22ac1bead1
--- /dev/null
+++ b/src/libs/glsl/glslastdump.cpp
@@ -0,0 +1,64 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#include "glslastdump.h"
+#include <QtCore/QTextStream>
+
+#ifdef Q_CC_GNU
+#  include <cxxabi.h>
+#endif
+
+using namespace GLSL;
+
+ASTDump::ASTDump(QTextStream &out)
+    : out(out), _depth(0)
+{
+}
+
+void ASTDump::operator()(AST *ast)
+{
+    _depth = 0;
+    accept(ast);
+}
+
+bool ASTDump::preVisit(AST *ast)
+{
+    const char *id = typeid(*ast).name();
+#ifdef Q_CC_GNU
+    id = abi::__cxa_demangle(id, 0, 0, 0);
+#endif
+    out << QByteArray(_depth, ' ') << id << endl;
+    ++_depth;
+    return true;
+}
+
+void ASTDump::postVisit(AST *)
+{
+    --_depth;
+}
diff --git a/src/libs/glsl/glslastdump.h b/src/libs/glsl/glslastdump.h
new file mode 100644
index 00000000000..c1bc249de38
--- /dev/null
+++ b/src/libs/glsl/glslastdump.h
@@ -0,0 +1,57 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#ifndef GLSLASTDUMP_H
+#define GLSLASTDUMP_H
+
+#include "glslastvisitor.h"
+
+QT_FORWARD_DECLARE_CLASS(QTextStream)
+
+namespace GLSL {
+
+class GLSL_EXPORT ASTDump: protected Visitor
+{
+public:
+    ASTDump(QTextStream &out);
+
+    void operator()(AST *ast);
+
+protected:
+    virtual bool preVisit(AST *);
+    virtual void postVisit(AST *);
+
+private:
+    QTextStream &out;
+    int _depth;
+};
+
+} // namespace GLSL
+
+#endif // GLSLASTDUMP_H
diff --git a/src/libs/glsl/glslastvisitor.cpp b/src/libs/glsl/glslastvisitor.cpp
index da22d0c299d..c0d5bbbcaa3 100644
--- a/src/libs/glsl/glslastvisitor.cpp
+++ b/src/libs/glsl/glslastvisitor.cpp
@@ -38,3 +38,9 @@ Visitor::Visitor()
 Visitor::~Visitor()
 {
 }
+
+void Visitor::accept(AST *ast)
+{
+    if (ast)
+        ast->accept(this);
+}
diff --git a/src/libs/glsl/glslastvisitor.h b/src/libs/glsl/glslastvisitor.h
index 1214ce19207..2f4b74875e5 100644
--- a/src/libs/glsl/glslastvisitor.h
+++ b/src/libs/glsl/glslastvisitor.h
@@ -39,6 +39,8 @@ public:
     Visitor();
     virtual ~Visitor();
 
+    void accept(AST *ast);
+
     virtual bool preVisit(AST *) { return true; }
     virtual void postVisit(AST *) {}