会计学符号表的作用(zuòyòng)标识符的存储种类(zhǒnglèi)、可见性和生命期（1）标识符的存储种类(zhǒnglèi)、可见性和生命期（2）标识符的存储种类(zhǒnglèi)、可见性和生命期（3）标识符的存储(cúnchǔ)种类、可见性和生命期（4）符号需要(xūyào)记录的典型属性标识符属性(shǔxìng)介绍（1）标识符属性(shǔxìng)介绍（2）标识符属性(shǔxìng)介绍（3）符号表的分类(fēnlèi)部分表项有效(yǒuxiào)的属性的处理符号表表项的设计(shèjì)结构化符号表表项的设计(shèjì)structNameblock{fieldtag;intindex;fieldvtype;fieldvclass;fieldvstg;expptrvleng;charvarname[VL+2];unsignedvdovar:1;unsignedvdcldone:1;unsignedvadjdim:1;unsignedvsave:1;unsignedvprocclass:3;unsignedvregno:4;unsignedvarray:1;unsignedvequiv:1;union{intvarno;structIntrpackedintrdesc;/*bitsforintrinsicfunction*/}vardesc;intveqno;structDimblock*vdim;ftnintvoffset;union{structHeadblock*hp;Chainpnamelist;/*pointstochainofnamesin*/Chainpvstfdesc;/*pointsto(formals,expr)pair*/}varxptr;intenamep;intindex_varxptr;/*名字是语函时为语函描述链头的链区索引(suǒyǐn)*/intindex_dim;intlength;unsignedis_shared:1;/*该变量是否为共享变量*/}面向对象的符号表表项设计(shèjì)classSymbol:publicBasic{protected:SYMBTAGm_tag;CString*m_pName;};classVarSymbol:publicSymbol{protected:union{struct{unsignedm_bInitialized:1;/*hasinitializevalue*/unsignedm_bUsed:1;/*beusedinthisprocedure*/unsignedm_bReturn:1;/*returnvalue*/unsignedm_bArgument:1;/*formalargumentflag*/unsignedm_bStatic:1;/*staticvariable*/unsignedm_bGlobal:1;/*globalvariable*/unsignedm_bExternal:1;/*externalvariable*/unsignedm_bCallRule:2;/*0:default,1:value,2:reference,3:content*/……};UINT32u;};Type*m_pType;Expression*m_pInitExpr;};classProcedureSymbol:publicSymbol{protected:union{struct{unsignedm_bSubProcedure:1;/*subprocedureflag*/……unsignedm_bHasDeclaratives:1;/*hasdeclpart*/};UINT32u;};Type*m_pProcType;/*proceduretype*/CompoundStmt*m_pBodyStmt;/*bodystateofthisproc,includingdeclaratives*/INT32m_iProcIndex;/*procedureindex*/ProcedureSymbol*m_pParentProcedure;/*parentprocsymbol*/P