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			97 lines
		
	
	
	
		
			2.6 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			97 lines
		
	
	
	
		
			2.6 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
#include "scriptparser.hpp"
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#include "errorhandler.hpp"
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#include "scanner.hpp"
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#include "skipparser.hpp"
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namespace Compiler
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{
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    ScriptParser::ScriptParser(ErrorHandler& errorHandler, const Context& context, Locals& locals, bool end)
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        : Parser(errorHandler, context)
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        , mOutput(locals)
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        , mLineParser(errorHandler, context, locals, mOutput.getLiterals(), mOutput.getCode())
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        , mControlParser(errorHandler, context, locals, mOutput.getLiterals())
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        , mEnd(end)
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    {
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    }
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    void ScriptParser::getCode(std::vector<Interpreter::Type_Code>& code) const
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    {
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        mOutput.getCode(code);
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    }
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    bool ScriptParser::parseName(const std::string& name, const TokenLoc& loc, Scanner& scanner)
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    {
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        mLineParser.reset();
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        if (mLineParser.parseName(name, loc, scanner))
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            scanner.scan(mLineParser);
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        return true;
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    }
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    bool ScriptParser::parseKeyword(int keyword, const TokenLoc& loc, Scanner& scanner)
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    {
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        if (keyword == Scanner::K_while || keyword == Scanner::K_if || keyword == Scanner::K_elseif)
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        {
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            mControlParser.reset();
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            if (mControlParser.parseKeyword(keyword, loc, scanner))
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                scanner.scan(mControlParser);
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            mControlParser.appendCode(mOutput.getCode());
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            return true;
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        }
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        /// \todo add an option to disable this nonsense
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        if (keyword == Scanner::K_endif)
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        {
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            // surplus endif
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            getErrorHandler().warning("endif without matching if/elseif", loc);
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            SkipParser skip(getErrorHandler(), getContext());
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            scanner.scan(skip);
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            return true;
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        }
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        if (keyword == Scanner::K_end && mEnd)
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        {
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            return false;
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        }
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        mLineParser.reset();
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        if (mLineParser.parseKeyword(keyword, loc, scanner))
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            scanner.scan(mLineParser);
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        return true;
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    }
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    bool ScriptParser::parseSpecial(int code, const TokenLoc& loc, Scanner& scanner)
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    {
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        if (code == Scanner::S_newline) // empty line
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            return true;
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        if (code == Scanner::S_open) /// \todo Option to switch this off
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        {
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            scanner.putbackSpecial(code, loc);
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            return parseKeyword(Scanner::K_if, loc, scanner);
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        }
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        mLineParser.reset();
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        if (mLineParser.parseSpecial(code, loc, scanner))
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            scanner.scan(mLineParser);
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        return true;
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    }
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    void ScriptParser::parseEOF(Scanner& scanner)
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    {
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        if (mEnd)
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            Parser::parseEOF(scanner);
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    }
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    void ScriptParser::reset()
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    {
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        mLineParser.reset();
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        mOutput.clear();
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    }
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}
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