projects / deliverable / titan.core.git / blame
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| 970ed795 EL |
1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Copyright (c) 2000-2014 Ericsson Telecom AB | |
| 3 | // All rights reserved. This program and the accompanying materials | |
| 4 | // are made available under the terms of the Eclipse Public License v1.0 | |
| 5 | // which accompanies this distribution, and is available at | |
| 6 | // http://www.eclipse.org/legal/epl-v10.html | |
| 7 | /////////////////////////////////////////////////////////////////////////////// | |
| 8 | #ifndef _Asn_Block_HH | |
| 9 | #define _Asn_Block_HH | |
| 10 | ||
| 11 | #include "../AST.hh" | |
| 12 | ||
| 13 | namespace Asn { | |
| 14 | ||
| 15 | using namespace Common; | |
| 16 | ||
| 17 | extern Node *parsed_node; | |
| 18 | ||
| 19 | class TokenBuf; | |
| 20 | ||
| 21 | /** | |
| 22 | * A node which represents an unparsed block. When parsing a file, | |
| 23 | * it is not always known what to expect when a block begins | |
| 24 | * ('{'). So, the tokens of the block are pushed into a TokenBuf. | |
| 25 | * Block is a wrapping-class for TokenBuf. As Block is a | |
| 26 | * Node-descendant, it can be used in the AST. | |
| 27 | * | |
| 28 | * After the examination of the block's context, it is known what to | |
| 29 | * expect in the block, so the block can be parsed. | |
| 30 | */ | |
| 31 | class Block : public Node, public Location { | |
| 32 | private: | |
| 33 | /** The wrapped token buffer. */ | |
| 34 | TokenBuf *tokenbuf; | |
| 35 | ||
| 36 | Block(const Block& p); | |
| 37 | public: | |
| 38 | /** Constructs a Block from a TokenBuf. */ | |
| 39 | Block(TokenBuf *p_tokenbuf); | |
| 40 | /** The destructor. */ | |
| 41 | virtual ~Block(); | |
| 42 | virtual Block* clone() const | |
| 43 | {return new Block(*this);} | |
| 44 | /** Returns the TokenBuf. You can modify (put tokens into/remove | |
| 45 | * tokens from) it, but do not delete the buffer! */ | |
| 46 | TokenBuf* get_TokenBuf() {return tokenbuf;} | |
| 47 | /** Parses the block. The expected content is expressed by \a | |
| 48 | * kw_token, which is a constant defined in the grammar | |
| 49 | * (asn1p.y). Returns an AST-subtree. To use this function, you | |
| 50 | * have to include the TokenBuf header, too. */ | |
| 51 | Node* parse(int kw_token); | |
| 52 | ||
| 53 | virtual void dump(unsigned) const; | |
| 54 | }; | |
| 55 | ||
| 56 | } // namespace Asn | |
| 57 | ||
| 58 | #endif /* _Asn_Block_HH */ |