Added plugin for supporting the Nim programming language

The plugin support:
- basic syntax highlighting
- indentation
- project management
- run and build configuration
- debugging
- code style

Change-Id: Idfbb02a11ed570c90149a54b726beb956712e2bd
Reviewed-by: David Schulz <david.schulz@theqtcompany.com>
Reviewed-by: hjk <hjk@theqtcompany.com>

src/plugins/nim/tools/nimlexer.h

@@ -0,0 +1,122 @@
+/****************************************************************************
+**
+** Copyright (C) Filippo Cucchetto <filippocucchetto@gmail.com>
+** Contact: http://www.qt.io/licensing
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "sourcecodestream.h"
+
+#include <QString>
+
+namespace Nim {
+
+class NimLexer
+{
+public:
+    enum State {
+        Default = -1,
+        MultiLineString = 0,
+        MultiLineComment = 1
+    };
+
+    struct TokenType {
+        enum Type {
+            Keyword = 0,
+            Identifier,
+            Comment,
+            Documentation,
+            StringLiteral,
+            MultiLineStringLiteral,
+            Operator,
+            Number,
+            EndOfText
+        };
+    };
+
+    struct Token {
+        Token()
+            : begin(0)
+            , length(0)
+            , type(TokenType::EndOfText)
+        {}
+
+        Token(int b, int l, TokenType::Type t)
+            : begin(b), length(l), type(t)
+        {}
+
+        int begin;
+        int length;
+        TokenType::Type type;
+    };
+
+    NimLexer(const QChar *text,
+             int length,
+             State state = State::Default );
+
+    Token next();
+
+    State state() const
+    {
+        return m_state;
+    }
+
+private:
+    Token onDefaultState();
+    Token onMultiLineStringState();
+    Token onMultiLineCommentState();
+
+    bool isSkipChar();
+
+    bool isOperator();
+    Token readOperator();
+
+    bool matchCommentStart();
+    Token readComment();
+
+    bool matchMultiLineCommentStart();
+    bool matchMultiLineCommendEnd();
+    Token readMultiLineComment(bool moveForward);
+
+    bool matchDocumentationStart();
+    Token readDocumentation();
+
+    bool matchNumber();
+    Token readNumber();
+
+    bool matchIdentifierOrKeywordStart();
+    Token readIdentifierOrKeyword();
+
+    bool matchStringLiteralStart();
+    Token readStringLiteral();
+
+    bool matchMultiLineStringLiteralStart();
+    Token readMultiLineStringLiteral(bool moveForward = true);
+
+    const QChar *m_text;
+    int m_length;
+    State m_state;
+    SourceCodeStream m_stream;
+};
+
+}