aec7ca0ce9
Fixes: https://github.com/supertuxkart/stk-code/issues/2528 Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
410 lines
20 KiB
C++
410 lines
20 KiB
C++
/*
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AngelCode Scripting Library
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Copyright (c) 2003-2017 Andreas Jonsson
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any
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damages arising from the use of this software.
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Permission is granted to anyone to use this software for any
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purpose, including commercial applications, and to alter it and
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redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you
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must not claim that you wrote the original software. If you use
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this software in a product, an acknowledgment in the product
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documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and
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must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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The original version of this library can be located at:
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http://www.angelcode.com/angelscript/
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Andreas Jonsson
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andreas@angelcode.com
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*/
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//
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// as_compiler.h
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//
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// The class that does the actual compilation of the functions
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//
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#ifndef AS_COMPILER_H
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#define AS_COMPILER_H
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#include "as_config.h"
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#ifndef AS_NO_COMPILER
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#include "as_builder.h"
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#include "as_scriptfunction.h"
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#include "as_variablescope.h"
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#include "as_bytecode.h"
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#include "as_array.h"
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#include "as_datatype.h"
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BEGIN_AS_NAMESPACE
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// This class represents the value of an expression as evaluated by the compiler.
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// It holds information such as the type of the value, stack offset for a local
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// variable, value of constants, whether the value can be modified (i.e. lvalue), etc.
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struct asCExprValue
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{
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asCExprValue();
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void Set(const asCDataType &dataType);
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void SetVariable(const asCDataType &dataType, int stackOffset, bool isTemporary);
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void SetConstantB(const asCDataType &dataType, asBYTE value);
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void SetConstantQW(const asCDataType &dataType, asQWORD value);
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void SetConstantDW(const asCDataType &dataType, asDWORD value);
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void SetConstantW(const asCDataType &dataType, asWORD value);
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void SetConstantF(const asCDataType &dataType, float value);
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void SetConstantD(const asCDataType &dataType, double value);
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void SetConstantB(asBYTE value);
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void SetConstantW(asWORD value);
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void SetConstantQW(asQWORD value);
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void SetConstantDW(asDWORD value);
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void SetConstantF(float value);
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void SetConstantD(double value);
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asBYTE GetConstantB();
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asWORD GetConstantW();
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asQWORD GetConstantQW();
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asDWORD GetConstantDW();
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float GetConstantF();
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double GetConstantD();
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void SetConstantData(const asCDataType &dataType, asQWORD value);
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asQWORD GetConstantData();
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void SetNullConstant();
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void SetUndefinedFuncHandle(asCScriptEngine *engine);
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void SetVoid();
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void SetDummy();
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bool IsUndefinedFuncHandle() const;
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bool IsNullConstant() const;
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bool IsVoid() const;
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asCDataType dataType;
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bool isLValue : 1; // Can this value be updated in assignment, or increment operators, etc
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bool isTemporary : 1;
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bool isConstant : 1;
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bool isVariable : 1;
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bool isExplicitHandle : 1;
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bool isRefToLocal : 1; // The reference may be to a local variable
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bool isHandleSafe : 1; // the life-time of the handle is guaranteed for the duration of the access
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short dummy : 9;
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short stackOffset;
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private:
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// These values must not be accessed directly in order to avoid problems with endianess.
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// Use the appropriate accessor methods instead
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union
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{
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asQWORD qwordValue;
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double doubleValue;
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asDWORD dwordValue;
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float floatValue;
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asWORD wordValue;
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asBYTE byteValue;
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};
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};
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struct asCExprContext;
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// This class holds information for arguments that needs to be
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// cleaned up after the result of a function has been evaluated.
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struct asSDeferredParam
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{
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asSDeferredParam() {argNode = 0; origExpr = 0;}
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asCScriptNode *argNode;
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asCExprValue argType;
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int argInOutFlags;
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asCExprContext *origExpr;
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};
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// TODO: refactor: asCExprContext should have indicators to inform where the value is,
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// i.e. if the reference to an object is pushed on the stack or not, etc
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// This class holds information about an expression that is being evaluated, e.g.
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// the current bytecode, ambiguous symbol names, property accessors, etc.
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struct asCExprContext
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{
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asCExprContext(asCScriptEngine *engine);
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~asCExprContext();
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void Clear();
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bool IsClassMethod() const;
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bool IsGlobalFunc() const;
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void SetLambda(asCScriptNode *funcDecl);
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bool IsLambda() const;
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void SetVoidExpression();
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bool IsVoidExpression() const;
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void Merge(asCExprContext *after);
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void SetAnonymousInitList(asCScriptNode *initList);
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bool IsAnonymousInitList() const;
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asCByteCode bc;
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asCExprValue type;
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int property_get;
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int property_set;
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bool property_const; // If the object that is being accessed through property accessor is read-only
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bool property_handle; // If the property accessor is called on an object stored in a handle
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bool property_ref; // If the property accessor is called on a reference
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bool isVoidExpression; // Set to true if the expression is an explicit 'void', e.g. used to ignore out parameters in func calls
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bool isCleanArg; // Set to true if the expression has only been initialized with default constructor
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asCExprContext *property_arg;
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asCArray<asSDeferredParam> deferredParams;
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asCScriptNode *exprNode;
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asCExprContext *origExpr;
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// TODO: cleanup: use ambiguousName and an enum to say if it is a method, global func, or enum value
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asCString methodName;
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asCString enumValue;
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bool isAnonymousInitList; // Set to true if the expression is an init list for which the type has not yet been determined
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};
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struct asSOverloadCandidate
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{
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asSOverloadCandidate() : funcId(0), cost(0) {}
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asSOverloadCandidate(int _id, asUINT _cost) : funcId(_id), cost(_cost) {}
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int funcId;
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asUINT cost;
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};
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struct asSNamedArgument
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{
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asCString name;
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asCExprContext *ctx;
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asUINT match;
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};
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enum EImplicitConv
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{
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asIC_IMPLICIT_CONV,
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asIC_EXPLICIT_REF_CAST,
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asIC_EXPLICIT_VAL_CAST
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};
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enum EConvCost
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{
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asCC_NO_CONV = 0,
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asCC_CONST_CONV = 1,
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asCC_ENUM_SAME_SIZE_CONV = 2,
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asCC_ENUM_DIFF_SIZE_CONV = 3,
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asCC_PRIMITIVE_SIZE_CONV = 4,
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asCC_SIGNED_CONV = 5,
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asCC_INT_FLOAT_CONV = 6,
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asCC_REF_CONV = 7,
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asCC_OBJ_TO_PRIMITIVE_CONV = 8,
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asCC_TO_OBJECT_CONV = 9,
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asCC_VARIABLE_CONV = 10
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};
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class asCCompiler
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{
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public:
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asCCompiler(asCScriptEngine *engine);
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~asCCompiler();
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int CompileFunction(asCBuilder *builder, asCScriptCode *script, asCArray<asCString> ¶meterNames, asCScriptNode *func, asCScriptFunction *outFunc, sClassDeclaration *classDecl);
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int CompileDefaultConstructor(asCBuilder *builder, asCScriptCode *script, asCScriptNode *node, asCScriptFunction *outFunc, sClassDeclaration *classDecl);
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int CompileFactory(asCBuilder *builder, asCScriptCode *script, asCScriptFunction *outFunc);
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int CompileGlobalVariable(asCBuilder *builder, asCScriptCode *script, asCScriptNode *expr, sGlobalVariableDescription *gvar, asCScriptFunction *outFunc);
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protected:
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friend class asCBuilder;
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void Reset(asCBuilder *builder, asCScriptCode *script, asCScriptFunction *outFunc);
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// Statements
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void CompileStatementBlock(asCScriptNode *block, bool ownVariableScope, bool *hasReturn, asCByteCode *bc);
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void CompileDeclaration(asCScriptNode *decl, asCByteCode *bc);
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void CompileStatement(asCScriptNode *statement, bool *hasReturn, asCByteCode *bc);
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void CompileIfStatement(asCScriptNode *node, bool *hasReturn, asCByteCode *bc);
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void CompileSwitchStatement(asCScriptNode *node, bool *hasReturn, asCByteCode *bc);
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void CompileCase(asCScriptNode *node, asCByteCode *bc);
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void CompileForStatement(asCScriptNode *node, asCByteCode *bc);
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void CompileWhileStatement(asCScriptNode *node, asCByteCode *bc);
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void CompileDoWhileStatement(asCScriptNode *node, asCByteCode *bc);
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void CompileBreakStatement(asCScriptNode *node, asCByteCode *bc);
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void CompileContinueStatement(asCScriptNode *node, asCByteCode *bc);
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void CompileReturnStatement(asCScriptNode *node, asCByteCode *bc);
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void CompileExpressionStatement(asCScriptNode *node, asCByteCode *bc);
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// Expressions
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int CompileAssignment(asCScriptNode *expr, asCExprContext *out);
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int CompileCondition(asCScriptNode *expr, asCExprContext *out);
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int CompileExpression(asCScriptNode *expr, asCExprContext *out);
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int CompilePostFixExpression(asCArray<asCScriptNode *> *postfix, asCExprContext *out);
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int CompileExpressionTerm(asCScriptNode *node, asCExprContext *out);
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int CompileExpressionPreOp(asCScriptNode *node, asCExprContext *out);
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int CompileExpressionPostOp(asCScriptNode *node, asCExprContext *out);
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int CompileExpressionValue(asCScriptNode *node, asCExprContext *out);
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int CompileFunctionCall(asCScriptNode *node, asCExprContext *out, asCObjectType *objectType, bool objIsConst, const asCString &scope = "");
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int CompileConstructCall(asCScriptNode *node, asCExprContext *out);
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int CompileConversion(asCScriptNode *node, asCExprContext *out);
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int CompileOperator(asCScriptNode *node, asCExprContext *l, asCExprContext *r, asCExprContext *out, eTokenType opToken = ttUnrecognizedToken, bool leftToRight = true);
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void CompileOperatorOnHandles(asCScriptNode *node, asCExprContext *l, asCExprContext *r, asCExprContext *out, eTokenType opToken = ttUnrecognizedToken);
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void CompileMathOperator(asCScriptNode *node, asCExprContext *l, asCExprContext *r, asCExprContext *out, eTokenType opToken = ttUnrecognizedToken);
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void CompileBitwiseOperator(asCScriptNode *node, asCExprContext *l, asCExprContext *r, asCExprContext *out, eTokenType opToken = ttUnrecognizedToken);
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void CompileComparisonOperator(asCScriptNode *node, asCExprContext *l, asCExprContext *r, asCExprContext *out, eTokenType opToken = ttUnrecognizedToken);
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void CompileBooleanOperator(asCScriptNode *node, asCExprContext *l, asCExprContext *r, asCExprContext *out, eTokenType opToken = ttUnrecognizedToken);
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bool CompileOverloadedDualOperator(asCScriptNode *node, asCExprContext *l, asCExprContext *r, bool leftToRight, asCExprContext *out, bool isHandle = false, eTokenType opToken = ttUnrecognizedToken);
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int CompileOverloadedDualOperator2(asCScriptNode *node, const char *methodName, asCExprContext *l, asCExprContext *r, bool leftToRight, asCExprContext *out, bool specificReturn = false, const asCDataType &returnType = asCDataType::CreatePrimitive(ttVoid, false));
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void CompileInitList(asCExprValue *var, asCScriptNode *node, asCByteCode *bc, int isVarGlobOrMem);
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int CompileInitListElement(asSListPatternNode *&patternNode, asCScriptNode *&valueNode, int bufferTypeId, short bufferVar, asUINT &bufferSize, asCByteCode &byteCode, int &elementsInSubList);
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int CompilerAnonymousInitList(asCScriptNode *listNode, asCExprContext *ctx, const asCDataType &dt);
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int CallDefaultConstructor(const asCDataType &type, int offset, bool isObjectOnHeap, asCByteCode *bc, asCScriptNode *node, int isVarGlobOrMem = 0, bool derefDest = false);
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int CallCopyConstructor(asCDataType &type, int offset, bool isObjectOnHeap, asCByteCode *bc, asCExprContext *arg, asCScriptNode *node, bool isGlobalVar = false, bool derefDestination = false);
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void CallDestructor(asCDataType &type, int offset, bool isObjectOnHeap, asCByteCode *bc);
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int CompileArgumentList(asCScriptNode *node, asCArray<asCExprContext *> &args, asCArray<asSNamedArgument> &namedArgs);
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int CompileDefaultAndNamedArgs(asCScriptNode *node, asCArray<asCExprContext*> &args, int funcId, asCObjectType *type, asCArray<asSNamedArgument> *namedArgs = 0);
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asUINT MatchFunctions(asCArray<int> &funcs, asCArray<asCExprContext*> &args, asCScriptNode *node, const char *name, asCArray<asSNamedArgument> *namedArgs = NULL, asCObjectType *objectType = NULL, bool isConstMethod = false, bool silent = false, bool allowObjectConstruct = true, const asCString &scope = "");
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int CompileVariableAccess(const asCString &name, const asCString &scope, asCExprContext *ctx, asCScriptNode *errNode, bool isOptional = false, bool noFunction = false, bool noGlobal = false, asCObjectType *objType = 0);
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void CompileMemberInitialization(asCByteCode *bc, bool onlyDefaults);
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bool CompileAutoType(asCDataType &autoType, asCExprContext &compiledCtx, asCScriptNode *exprNode, asCScriptNode *errNode);
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bool CompileInitialization(asCScriptNode *node, asCByteCode *bc, const asCDataType &type, asCScriptNode *errNode, int offset, asQWORD *constantValue, int isVarGlobOrMem, asCExprContext *preCompiled = 0);
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void CompileInitAsCopy(asCDataType &type, int offset, asCByteCode *bc, asCExprContext *arg, asCScriptNode *node, bool derefDestination);
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// Helper functions
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void ConvertToPostFix(asCScriptNode *expr, asCArray<asCScriptNode *> &postfix);
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void ProcessPropertyGetAccessor(asCExprContext *ctx, asCScriptNode *node);
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int ProcessPropertySetAccessor(asCExprContext *ctx, asCExprContext *arg, asCScriptNode *node);
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int ProcessPropertyGetSetAccessor(asCExprContext *ctx, asCExprContext *lctx, asCExprContext *rctx, eTokenType op, asCScriptNode *errNode);
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int FindPropertyAccessor(const asCString &name, asCExprContext *ctx, asCScriptNode *node, asSNameSpace *ns, bool isThisAccess = false);
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int FindPropertyAccessor(const asCString &name, asCExprContext *ctx, asCExprContext *arg, asCScriptNode *node, asSNameSpace *ns, bool isThisAccess = false);
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void PrepareTemporaryVariable(asCScriptNode *node, asCExprContext *ctx, bool forceOnHeap = false);
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void PrepareOperand(asCExprContext *ctx, asCScriptNode *node);
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void PrepareForAssignment(asCDataType *lvalue, asCExprContext *rvalue, asCScriptNode *node, bool toTemporary, asCExprContext *lvalueExpr = 0);
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int PerformAssignment(asCExprValue *lvalue, asCExprValue *rvalue, asCByteCode *bc, asCScriptNode *node);
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bool IsVariableInitialized(asCExprValue *type, asCScriptNode *node);
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void Dereference(asCExprContext *ctx, bool generateCode);
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bool CompileRefCast(asCExprContext *ctx, const asCDataType &to, bool isExplicit, asCScriptNode *node, bool generateCode = true);
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asUINT MatchArgument(asCArray<int> &funcs, asCArray<asSOverloadCandidate> &matches, const asCExprContext *argExpr, int paramNum, bool allowObjectConstruct = true);
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int MatchArgument(asCScriptFunction *desc, const asCExprContext *argExpr, int paramNum, bool allowObjectConstruct = true);
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void PerformFunctionCall(int funcId, asCExprContext *out, bool isConstructor = false, asCArray<asCExprContext*> *args = 0, asCObjectType *objTypeForConstruct = 0, bool useVariable = false, int varOffset = 0, int funcPtrVar = 0);
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void MoveArgsToStack(int funcId, asCByteCode *bc, asCArray<asCExprContext *> &args, bool addOneToOffset);
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void MakeFunctionCall(asCExprContext *ctx, int funcId, asCObjectType *objectType, asCArray<asCExprContext*> &args, asCScriptNode *node, bool useVariable = false, int stackOffset = 0, int funcPtrVar = 0);
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void PrepareFunctionCall(int funcId, asCByteCode *bc, asCArray<asCExprContext *> &args);
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void AfterFunctionCall(int funcId, asCArray<asCExprContext*> &args, asCExprContext *ctx, bool deferAll);
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void ProcessDeferredParams(asCExprContext *ctx);
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int PrepareArgument(asCDataType *paramType, asCExprContext *ctx, asCScriptNode *node, bool isFunction = false, int refType = 0, bool isMakingCopy = false);
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void PrepareArgument2(asCExprContext *ctx, asCExprContext *arg, asCDataType *paramType, bool isFunction = false, int refType = 0, bool isMakingCopy = false);
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bool IsLValue(asCExprValue &type);
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int DoAssignment(asCExprContext *out, asCExprContext *lctx, asCExprContext *rctx, asCScriptNode *lexpr, asCScriptNode *rexpr, eTokenType op, asCScriptNode *opNode);
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void MergeExprBytecode(asCExprContext *before, asCExprContext *after);
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void MergeExprBytecodeAndType(asCExprContext *before, asCExprContext *after);
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void FilterConst(asCArray<int> &funcs, bool removeConst = true);
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void ConvertToVariable(asCExprContext *ctx);
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void ConvertToVariableNotIn(asCExprContext *ctx, asCExprContext *exclude);
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void ConvertToTempVariable(asCExprContext *ctx);
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void ConvertToTempVariableNotIn(asCExprContext *ctx, asCExprContext *exclude);
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void ConvertToReference(asCExprContext *ctx);
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void PushVariableOnStack(asCExprContext *ctx, bool asReference);
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void DestroyVariables(asCByteCode *bc);
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asSNameSpace *DetermineNameSpace(const asCString &scope);
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int SetupParametersAndReturnVariable(asCArray<asCString> ¶meterNames, asCScriptNode *func);
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void DetermineSingleFunc(asCExprContext *ctx, asCScriptNode *node);
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// Returns the cost of the conversion (the sum of the EConvCost performed)
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asUINT ImplicitConversion(asCExprContext *ctx, const asCDataType &to, asCScriptNode *node, EImplicitConv convType, bool generateCode = true, bool allowObjectConstruct = true);
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asUINT ImplicitConvPrimitiveToPrimitive(asCExprContext *ctx, const asCDataType &to, asCScriptNode *node, EImplicitConv convType, bool generateCode = true);
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asUINT ImplicitConvObjectToPrimitive(asCExprContext *ctx, const asCDataType &to, asCScriptNode *node, EImplicitConv convType, bool generateCode = true);
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asUINT ImplicitConvPrimitiveToObject(asCExprContext *ctx, const asCDataType &to, asCScriptNode *node, EImplicitConv convType, bool generateCode = true, bool allowObjectConstruct = true);
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asUINT ImplicitConvObjectToObject(asCExprContext *ctx, const asCDataType &to, asCScriptNode *node, EImplicitConv convType, bool generateCode = true, bool allowObjectConstruct = true);
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asUINT ImplicitConvObjectRef(asCExprContext *ctx, const asCDataType &to, asCScriptNode *node, EImplicitConv convType, bool generateCode);
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asUINT ImplicitConvObjectValue(asCExprContext *ctx, const asCDataType &to, asCScriptNode *node, EImplicitConv convType, bool generateCode);
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void ImplicitConversionConstant(asCExprContext *ctx, const asCDataType &to, asCScriptNode *node, EImplicitConv convType);
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void ImplicitConvObjectToBestMathType(asCExprContext *ctx, asCScriptNode *node);
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asUINT ImplicitConvLambdaToFunc(asCExprContext *ctx, const asCDataType &to, asCScriptNode *node, EImplicitConv convType, bool generateCode = true);
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void LineInstr(asCByteCode *bc, size_t pos);
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asUINT ProcessStringConstant(asCString &str, asCScriptNode *node, bool processEscapeSequences = true);
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void ProcessHeredocStringConstant(asCString &str, asCScriptNode *node);
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int GetPrecedence(asCScriptNode *op);
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void Error(const asCString &msg, asCScriptNode *node);
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void Warning(const asCString &msg, asCScriptNode *node);
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void Information(const asCString &msg, asCScriptNode *node);
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void PrintMatchingFuncs(asCArray<int> &funcs, asCScriptNode *node, asCObjectType *inType = 0);
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void AddVariableScope(bool isBreakScope = false, bool isContinueScope = false);
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void RemoveVariableScope();
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void FinalizeFunction();
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asCByteCode byteCode;
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bool hasCompileErrors;
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int nextLabel;
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int numLambdas;
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asCVariableScope *variables;
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asCBuilder *builder;
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asCScriptEngine *engine;
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asCScriptCode *script;
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asCScriptFunction *outFunc;
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bool m_isConstructor;
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bool m_isConstructorCalled;
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sClassDeclaration *m_classDecl;
|
|
sGlobalVariableDescription *m_globalVar;
|
|
|
|
asCArray<int> breakLabels;
|
|
asCArray<int> continueLabels;
|
|
|
|
int AllocateVariable(const asCDataType &type, bool isTemporary, bool forceOnHeap = false);
|
|
int AllocateVariableNotIn(const asCDataType &type, bool isTemporary, bool forceOnHeap, asCExprContext *ctx);
|
|
int GetVariableOffset(int varIndex);
|
|
int GetVariableSlot(int varOffset);
|
|
void DeallocateVariable(int pos);
|
|
void ReleaseTemporaryVariable(asCExprValue &t, asCByteCode *bc);
|
|
void ReleaseTemporaryVariable(int offset, asCByteCode *bc);
|
|
bool IsVariableOnHeap(int offset);
|
|
|
|
// This ordered array indicates the type of each variable
|
|
asCArray<asCDataType> variableAllocations;
|
|
|
|
// This ordered array indicates which variables are temporaries or not
|
|
asCArray<bool> variableIsTemporary;
|
|
|
|
// This unordered array gives the offsets of all temporary variables, whether currently allocated or not
|
|
asCArray<int> tempVariableOffsets;
|
|
|
|
// This ordered array indicated if the variable is on the heap or not
|
|
asCArray<bool> variableIsOnHeap;
|
|
|
|
// This unordered array gives the indexes of the currently unused variables
|
|
asCArray<int> freeVariables;
|
|
|
|
// This array holds the offsets of the currently allocated temporary variables
|
|
asCArray<int> tempVariables;
|
|
|
|
// This array holds the indices of variables that must not be used in an allocation
|
|
asCArray<int> reservedVariables;
|
|
|
|
// This array holds the string constants that were allocated during the compilation,
|
|
// so they can be released upon completion, whether the compilation was successful or not.
|
|
asCArray<void*> usedStringConstants;
|
|
|
|
bool isCompilingDefaultArg;
|
|
bool isProcessingDeferredParams;
|
|
int noCodeOutput;
|
|
};
|
|
|
|
END_AS_NAMESPACE
|
|
|
|
#endif // AS_NO_COMPILER
|
|
|
|
#endif
|