127 lines
4.7 KiB
C++
127 lines
4.7 KiB
C++
//--------------------------------------------------------------------*- C++ -*-
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// CLING - the C++ LLVM-based InterpreterG :)
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// author: Vassil Vassilev <vasil.georgiev.vasilev@cern.ch>
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//
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// This file is dual-licensed: you can choose to license it under the University
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// of Illinois Open Source License or the GNU Lesser General Public License. See
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// LICENSE.TXT for details.
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//------------------------------------------------------------------------------
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#ifndef CLING_META_PARSER_H
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#define CLING_META_PARSER_H
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#include "MetaLexer.h" // for cling::Token
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#include "MetaSema.h" // for ActionResult
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/ADT/SmallVector.h"
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namespace llvm {
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class StringRef;
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}
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namespace cling {
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class MetaLexer;
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class MetaSema;
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class Value;
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// Command syntax: MetaCommand := <CommandSymbol><Command>
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// CommandSymbol := '.' | '//.'
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// Command := LCommand | XCommand | qCommand | UCommand |
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// ICommand | OCommand | RawInputCommand |
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// PrintDebugCommand | DynamicExtensionsCommand |
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// HelpCommand | FileExCommand | FilesCommand |
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// ClassCommand | GCommand | StoreStateCommand |
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// CompareStateCommand | StatsCommand | undoCommand
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// LCommand := 'L' FilePath
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// >Command := '>' FilePath
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// qCommand := 'q'
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// XCommand := 'x' FilePath[ArgList] | 'X' FilePath[ArgList]
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// UCommand := 'U' FilePath
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// ICommand := 'I' [FilePath]
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// OCommand := 'O'[' ']Constant
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// RawInputCommand := 'rawInput' [Constant]
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// PrintDebugCommand := 'printDebug' [Constant]
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// StoreStateCommand := 'storeState' "Ident"
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// CompareStateCommand := 'compareState' "Ident"
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// StatsCommand := 'stats' ['ast']
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// undoCommand := 'undo' [Constant]
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// DynamicExtensionsCommand := 'dynamicExtensions' [Constant]
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// HelpCommand := 'help'
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// FileExCommand := 'fileEx'
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// FilesCommand := 'files'
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// ClassCommand := 'class' AnyString | 'Class'
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// GCommand := 'g' [Ident]
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// FilePath := AnyString
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// ArgList := (ExtraArgList) ' ' [ArgList]
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// ExtraArgList := AnyString [, ExtraArgList]
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// AnyString := *^(' ' | '\t')
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// Constant := {0-9}
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// Ident := a-zA-Z{a-zA-Z0-9}
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//
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class MetaParser {
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private:
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llvm::OwningPtr<MetaLexer> m_Lexer;
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llvm::OwningPtr<MetaSema> m_Actions;
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llvm::SmallVector<Token, 2> m_TokenCache;
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llvm::SmallVector<Token, 4> m_MetaSymbolCache;
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private:
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///\brief Returns the current token without consuming it.
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///
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inline const Token& getCurTok() { return lookAhead(0); }
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///\brief Consume the current 'peek' token.
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///
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void consumeToken();
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void consumeAnyStringToken(tok::TokenKind stopAt = tok::space);
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const Token& lookAhead(unsigned Num);
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void skipWhitespace();
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bool isCommandSymbol();
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bool isCommand(MetaSema::ActionResult& actionResult,
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Value* resultValue);
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bool isLCommand(MetaSema::ActionResult& actionResult);
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bool isRedirectCommand(MetaSema::ActionResult& actionResult);
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bool isExtraArgList();
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bool isXCommand(MetaSema::ActionResult& actionResult,
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Value* resultValue);
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bool isqCommand();
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bool isUCommand(MetaSema::ActionResult& actionResult);
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bool isICommand();
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bool isOCommand();
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bool israwInputCommand();
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bool isprintDebugCommand();
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bool isstoreStateCommand();
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bool iscompareStateCommand();
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bool isstatsCommand();
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bool isundoCommand();
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bool isdynamicExtensionsCommand();
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bool ishelpCommand();
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bool isfileExCommand();
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bool isfilesCommand();
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bool isClassCommand();
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bool isNamespaceCommand();
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bool isgCommand();
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bool isTypedefCommand();
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bool isShellCommand(MetaSema::ActionResult& actionResult,
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Value* resultValue);
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public:
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MetaParser(MetaSema* Actions);
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void enterNewInputLine(llvm::StringRef Line);
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///\brief Drives the recursive decendent parsing.
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///
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///\returns true if it was meta command.
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///
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bool isMetaCommand(MetaSema::ActionResult& actionResult,
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Value* resultValue);
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///\brief Returns whether quit was requested via .q command
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///
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bool isQuitRequested() const;
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MetaSema& getActions() const { return *m_Actions.get(); }
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};
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} // end namespace cling
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#endif // CLING_META_PARSER_H
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