lib/Parse/AttributeList.cpp

//===--- AttributeList.cpp --------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the AttributeList class implementation
//
//===----------------------------------------------------------------------===//

#include "clang/Parse/AttributeList.h"
#include "clang/Basic/IdentifierTable.h"
#include "llvm/ADT/StringSwitch.h"
using namespace clang;

AttributeList::AttributeList(IdentifierInfo *aName, SourceLocation aLoc,
                             IdentifierInfo *pName, SourceLocation pLoc,
                             ActionBase::ExprTy **ExprList, unsigned numArgs,
                             AttributeList *n, bool declspec)
  : AttrName(aName), AttrLoc(aLoc), ParmName(pName), ParmLoc(pLoc),
    NumArgs(numArgs), Next(n), DeclspecAttribute(declspec) {

  if (numArgs == 0)
    Args = 0;
  else {
    Args = new ActionBase::ExprTy*[numArgs];
    memcpy(Args, ExprList, numArgs*sizeof(Args[0]));
  }
}

AttributeList::~AttributeList() {
  if (Args) {
    // FIXME: before we delete the vector, we need to make sure the Expr's
    // have been deleted. Since ActionBase::ExprTy is "void", we are dependent
    // on the actions module for actually freeing the memory. The specific
    // hooks are ActOnDeclarator, ActOnTypeName, ActOnParamDeclaratorType,
    // ParseField, ParseTag. Once these routines have freed the expression,
    // they should zero out the Args slot (to indicate the memory has been
    // freed). If any element of the vector is non-null, we should assert.
    delete [] Args;
  }
  delete Next;
}

AttributeList::Kind AttributeList::getKind(const IdentifierInfo *Name) {
  llvm::StringRef AttrName = Name->getName();

  // Normalize the attribute name, __foo__ becomes foo.
  if (AttrName.startswith("__") && AttrName.endswith("__"))
    AttrName = AttrName.substr(2, AttrName.size() - 4);

  // FIXME: Hand generating this is neither smart nor efficient.
  return llvm::StringSwitch<AttributeList::Kind>(AttrName)
    .Case("weak", AT_weak)
    .Case("pure", AT_pure)
    .Case("mode", AT_mode)
    .Case("used", AT_used)
    .Case("alias", AT_alias)
    .Case("const", AT_const)
    .Case("packed", AT_packed)
    .Case("malloc", AT_malloc)
    .Case("format", AT_format)
    .Case("unused", AT_unused)
    .Case("blocks", AT_blocks)
    .Case("aligned", AT_aligned)
    .Case("cleanup", AT_cleanup)
    .Case("nodebug", AT_nodebug)
    .Case("nonnull", AT_nonnull)
    .Case("nothrow", AT_nothrow)
    .Case("objc_gc", AT_objc_gc)
    .Case("regparm", AT_regparm)
    .Case("section", AT_section)
    .Case("stdcall", AT_stdcall)
    .Case("annotate", AT_annotate)
    .Case("noreturn", AT_noreturn)
    .Case("noinline", AT_noinline)
    .Case("fastcall", AT_fastcall)
    .Case("iboutlet", AT_IBOutlet)
    .Case("sentinel", AT_sentinel)
    .Case("NSObject", AT_nsobject)
    .Case("dllimport", AT_dllimport)
    .Case("dllexport", AT_dllexport)
    .Case("may_alias", IgnoredAttribute) // FIXME: TBAA
    .Case("deprecated", AT_deprecated)
    .Case("visibility", AT_visibility)
    .Case("destructor", AT_destructor)
    .Case("format_arg", AT_format_arg)
    .Case("gnu_inline", AT_gnu_inline)
    .Case("weak_import", AT_weak_import)
    .Case("vector_size", AT_vector_size)
    .Case("constructor", AT_constructor)
    .Case("unavailable", AT_unavailable)
    .Case("overloadable", AT_overloadable)
    .Case("address_space", AT_address_space)
    .Case("always_inline", AT_always_inline)
    .Case("vec_type_hint", IgnoredAttribute)
    .Case("objc_exception", AT_objc_exception)
    .Case("ext_vector_type", AT_ext_vector_type)
    .Case("transparent_union", AT_transparent_union)
    .Case("analyzer_noreturn", AT_analyzer_noreturn)
    .Case("warn_unused_result", AT_warn_unused_result)
    .Case("ns_returns_retained", AT_ns_returns_retained)
    .Case("cf_returns_retained", AT_cf_returns_retained)
    .Case("reqd_work_group_size", AT_reqd_wg_size)
    .Case("no_instrument_function", AT_no_instrument_function)
    .Default(UnknownAttribute);
}