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			75 lines
		
	
	
	
		
			2.2 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			75 lines
		
	
	
	
		
			2.2 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
#ifndef COMPILER_CONTROLPARSER_H_INCLUDED
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#define COMPILER_CONTROLPARSER_H_INCLUDED
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#include <vector>
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#include <components/interpreter/types.hpp>
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#include "parser.hpp"
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#include "exprparser.hpp"
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#include "lineparser.hpp"
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namespace Compiler
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{
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    class Locals;
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    class Literals;
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    // Control structure parser
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    class ControlParser : public Parser
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    {
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            enum State
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            {
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                StartState,
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                IfEndState, IfBodyState,
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                IfElseifEndState, IfElseifBodyState,
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                IfElseEndState, IfElseBodyState,
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                IfEndifState,
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                WhileEndState, WhileBodyState,
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                WhileEndwhileState,
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                IfElseJunkState
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            };
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            typedef std::vector<Interpreter::Type_Code> Codes;
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            typedef std::vector<std::pair<Codes, Codes> > IfCodes;
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            Locals& mLocals;
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            Literals& mLiterals;
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            Codes mCode;
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            Codes mCodeBlock;
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            IfCodes mIfCode; // condition, body
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            LineParser mLineParser;
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            ExprParser mExprParser;
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            State mState;
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            bool parseIfBody (int keyword, const TokenLoc& loc, Scanner& scanner);
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            bool parseWhileBody (int keyword, const TokenLoc& loc, Scanner& scanner);
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        public:
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            ControlParser (ErrorHandler& errorHandler, const Context& context, Locals& locals,
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                Literals& literals);
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            void appendCode (std::vector<Interpreter::Type_Code>& code) const;
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            ///< store generated code in \a code.
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            virtual bool parseName (const std::string& name, const TokenLoc& loc,
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                Scanner& scanner);
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            ///< Handle a name token.
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            /// \return fetch another token?
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            virtual bool parseKeyword (int keyword, const TokenLoc& loc, Scanner& scanner);
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            ///< Handle a keyword token.
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            /// \return fetch another token?
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            virtual bool parseSpecial (int code, const TokenLoc& loc, Scanner& scanner);
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            ///< Handle a special character token.
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            /// \return fetch another token?
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            void reset();
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            ///< Reset parser to clean state.
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    };
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}
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#endif
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