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view dmd2/scope.h @ 1317:4099548c80e0
Allocate objects on the stack if they (a) don't have a destructor, and
(b) don't override the delete operator (on top of the regular conditions for
stack allocation that also apply to arrays, structs, etc.).
The "no destructor" clause is not strictly necessary, but calling them at the
right time would be tricky to say the least; it would involve, among other
things, "manually" inserting a try-finally block around anything that might
throw exceptions not caught in the current function.
Note: objects with custom new operators are automatically ignored because they
don't use the regular allocation runtime call, so there's no need to pay special
attention to them.
author | Frits van Bommel <fvbommel wxs.nl> |
---|---|
date | Sat, 09 May 2009 00:50:15 +0200 |
parents | 356e65836fb5 |
children | 638d16625da2 |
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// Copyright (c) 1999-2005 by Digital Mars // All Rights Reserved // written by Walter Bright // http://www.digitalmars.com // License for redistribution is by either the Artistic License // in artistic.txt, or the GNU General Public License in gnu.txt. // See the included readme.txt for details. #ifndef DMD_SCOPE_H #define DMD_SCOPE_H #ifdef __DMC__ #pragma once #endif /* __DMC__ */ struct Dsymbol; struct ScopeDsymbol; struct Array; struct Identifier; struct Module; struct Statement; struct SwitchStatement; struct TryFinallyStatement; struct LabelStatement; struct ForeachStatement; struct ClassDeclaration; struct AggregateDeclaration; struct AnonymousAggregateDeclaration; struct FuncDeclaration; struct DocComment; struct EnclosingHandler; struct AnonDeclaration; #if __GNUC__ #include "dsymbol.h" // PROT #include "mars.h" // LINK #else enum LINK; enum PROT; #endif struct Scope { Scope *enclosing; // enclosing Scope Module *module; // Root module ScopeDsymbol *scopesym; // current symbol ScopeDsymbol *sd; // if in static if, and declaring new symbols, // sd gets the addMember() FuncDeclaration *func; // function we are in Dsymbol *parent; // parent to use LabelStatement *slabel; // enclosing labelled statement SwitchStatement *sw; // enclosing switch statement TryFinallyStatement *tf; // enclosing try finally statement; set inside its finally block EnclosingHandler *tfOfTry; // enclosing try-finally, volatile or synchronized statement; set inside its try or body block TemplateInstance *tinst; // enclosing template instance Statement *sbreak; // enclosing statement that supports "break" Statement *scontinue; // enclosing statement that supports "continue" ForeachStatement *fes; // if nested function for ForeachStatement, this is it unsigned offset; // next offset to use in aggregate int inunion; // we're processing members of a union int incontract; // we're inside contract code int nofree; // set if shouldn't free it int noctor; // set if constructor calls aren't allowed int intypeof; // in typeof(exp) int parameterSpecialization; // if in template parameter specialization int noaccesscheck; // don't do access checks unsigned callSuper; // primitive flow analysis for constructors #define CSXthis_ctor 1 // called this() #define CSXsuper_ctor 2 // called super() #define CSXthis 4 // referenced this #define CSXsuper 8 // referenced super #define CSXlabel 0x10 // seen a label #define CSXreturn 0x20 // seen a return statement #define CSXany_ctor 0x40 // either this() or super() was called unsigned structalign; // alignment for struct members enum LINK linkage; // linkage for external functions enum PROT protection; // protection for class members int explicitProtection; // set if in an explicit protection attribute unsigned stc; // storage class unsigned flags; #define SCOPEctor 1 // constructor type #define SCOPEstaticif 2 // inside static if #define SCOPEfree 4 // is on free list AnonymousAggregateDeclaration *anonAgg; // for temporary analysis DocComment *lastdc; // documentation comment for last symbol at this scope unsigned lastoffset; // offset in docbuf of where to insert next dec OutBuffer *docbuf; // buffer for documentation output static Scope *freelist; static void *operator new(size_t sz); static Scope *createGlobal(Module *module); Scope(); Scope(Module *module); Scope(Scope *enclosing); Scope *push(); Scope *push(ScopeDsymbol *ss); Scope *pop(); void mergeCallSuper(Loc loc, unsigned cs); Dsymbol *search(Loc loc, Identifier *ident, Dsymbol **pscopesym); Dsymbol *insert(Dsymbol *s); ClassDeclaration *getClassScope(); AggregateDeclaration *getStructClassScope(); void setNoFree(); }; #endif /* DMD_SCOPE_H */