forked from Mirrors/openclonk
110 lines
3.7 KiB
C++
110 lines
3.7 KiB
C++
/*
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* OpenClonk, http://www.openclonk.org
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*
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* Copyright (c) 2001-2009, RedWolf Design GmbH, http://www.clonk.de/
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* Copyright (c) 2009-2016, The OpenClonk Team and contributors
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*
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* Distributed under the terms of the ISC license; see accompanying file
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* "COPYING" for details.
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*
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* "Clonk" is a registered trademark of Matthes Bender, used with permission.
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* See accompanying file "TRADEMARK" for details.
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*
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* To redistribute this file separately, substitute the full license texts
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* for the above references.
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*/
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#ifndef INC_C4AulParse
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#define INC_C4AulParse
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#include "script/C4Aul.h"
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#include "script/C4AulAST.h"
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#include "script/C4AulCompiler.h"
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#include "script/C4AulScriptFunc.h"
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#include <stack>
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enum C4AulBCCType : int;
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enum C4AulTokenType : int;
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struct C4ScriptOpDef
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{
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unsigned short Priority;
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const char* Identifier;
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C4AulBCCType Code;
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bool Postfix;
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bool Changer; // changes first operand to result, rewrite to "a = a (op) b"
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bool NoSecondStatement; // no second statement expected (++/-- postfix)
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C4V_Type RetType; // type returned. ignored by C4V
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C4V_Type Type1;
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C4V_Type Type2;
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};
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extern const C4ScriptOpDef C4ScriptOpMap[];
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class C4AulParse
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{
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public:
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C4AulParse(class C4ScriptHost *host);
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C4AulParse(C4AulScriptFunc * Fn, C4AulScriptContext* context, C4AulScriptEngine *Engine);
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~C4AulParse();
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std::unique_ptr<::aul::ast::FunctionDecl> Parse_DirectExec(const char *code, bool whole_function);
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std::unique_ptr<::aul::ast::Script> Parse_Script(C4ScriptHost *);
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private:
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C4AulScriptFunc *Fn; C4ScriptHost * Host; C4ScriptHost * pOrgScript;
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C4AulScriptEngine *Engine;
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const char *SPos; // current position in the script
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const char *TokenSPos; // start of the current token in the script
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char Idtf[C4AUL_MAX_Identifier]; // current identifier
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C4AulTokenType TokenType; // current token type
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int32_t cInt; // current int constant
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C4String * cStr; // current string constant
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C4AulScriptContext* ContextToExecIn;
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void Parse_Function(bool parse_for_direct_exec);
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void Parse_WarningPragma();
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protected:
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// All of the Parse_* functions need to be protected (not private!) so
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// we can make them public in a derived class for unit testing purposes
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std::unique_ptr<::aul::ast::FunctionDecl> Parse_ToplevelFunctionDecl();
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std::unique_ptr<::aul::ast::Stmt> Parse_Statement();
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std::unique_ptr<::aul::ast::Block> Parse_Block();
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std::unique_ptr<::aul::ast::ArrayLit> Parse_Array();
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std::unique_ptr<::aul::ast::ProplistLit> Parse_PropList();
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std::unique_ptr<::aul::ast::DoLoop> Parse_DoWhile();
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std::unique_ptr<::aul::ast::WhileLoop> Parse_While();
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std::unique_ptr<::aul::ast::If> Parse_If();
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std::unique_ptr<::aul::ast::ForLoop> Parse_For();
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std::unique_ptr<::aul::ast::RangeLoop> Parse_ForEach();
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std::unique_ptr<::aul::ast::Expr> Parse_Expression(int iParentPrio = -1);
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std::unique_ptr<::aul::ast::VarDecl> Parse_Var();
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void Shift();
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private:
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void Parse_Function(::aul::ast::Function *func);
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void Parse_CallParams(::aul::ast::CallExpr *call);
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bool AdvanceSpaces(); // skip whitespaces; return whether script ended
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int GetOperator(const char* pScript);
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void ClearToken(); // clear any data held with the current token
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C4AulTokenType GetNextToken(); // get next token of SPos
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void Match(C4AulTokenType TokenType, const char * Expected = nullptr);
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void Check(C4AulTokenType TokenType, const char * Expected = nullptr);
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NORETURN void UnexpectedToken(const char * Expected);
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void Warn(C4AulWarningId warning, ...);
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bool IsWarningEnabled(const char *pos, C4AulWarningId warning) const;
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void Error(const char *pMsg, ...) GNUC_FORMAT_ATTRIBUTE_O;
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void AppendPosition(StdStrBuf & Buf);
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friend class C4AulParseError;
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std::stack<const char *> parse_pos_stack;
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void PushParsePos();
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void PopParsePos();
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void DiscardParsePos();
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};
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#endif
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