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76 lines
2.2 KiB
C++
76 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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bool parseName (const std::string& name, const TokenLoc& loc,
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Scanner& scanner) override;
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///< Handle a name token.
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/// \return fetch another token?
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bool parseKeyword (int keyword, const TokenLoc& loc, Scanner& scanner) override;
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///< Handle a keyword token.
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/// \return fetch another token?
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bool parseSpecial (int code, const TokenLoc& loc, Scanner& scanner) override;
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///< Handle a special character token.
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/// \return fetch another token?
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void reset() override;
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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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