Attribute range is not included in extern declaration

[nojaf]

Consider the following code:

[<DllImport("oleacc.dll")>]
extern int AccessibleChildren()

Matching AST

ImplFile
  (ParsedImplFileInput
     ("tmp.fsx", true, QualifiedNameOfFile Tmp$fsx, [], [],
      [SynModuleOrNamespace
         ([Tmp], false, AnonModule,
          [Let
             (false,
              [SynBinding
                 (None, Normal, false, false,
                  [{ Attributes =
                      [{ TypeName = LongIdentWithDots ([DllImport], [])
                         ArgExpr =
                          Paren
                            (Const
                               (String
                                  ("oleacc.dll", Regular,
                                   tmp.fsx (1,12--1,24) IsSynthetic=false),
                                tmp.fsx (1,12--1,24) IsSynthetic=false),
                             tmp.fsx (1,11--1,12) IsSynthetic=false,
                             Some tmp.fsx (1,24--1,25) IsSynthetic=false,
                             tmp.fsx (1,11--1,25) IsSynthetic=false)
                         Target = None
                         AppliesToGetterAndSetter = false
                         Range = tmp.fsx (1,2--1,11) IsSynthetic=false }]
                     Range = tmp.fsx (1,0--1,27) IsSynthetic=false }],
                  PreXmlDoc ((2,6), FSharp.Compiler.Xml.XmlDocCollector),
                  SynValData
                    (None, SynValInfo ([[]], SynArgInfo ([], false, None)), None),
                  LongIdent
                    (LongIdentWithDots ([AccessibleChildren], []), None,
                     Some (SynValTyparDecls ([], false, [])),
                     Pats
                       [Tuple
                          (false, [], tmp.fsx (2,29--2,30) IsSynthetic=false)],
                     None, tmp.fsx (2,11--2,29) IsSynthetic=false),
                  Some
                    (SynBindingReturnInfo
                       (App
                          (LongIdent (LongIdentWithDots ([int], [])), None, [],
                           [], None, false,
                           tmp.fsx (2,7--2,10) IsSynthetic=false),
                        tmp.fsx (2,7--2,10) IsSynthetic=false, [])),
                  Typed
                    (App
                       (NonAtomic, false, Ident failwith,
                        Const
                          (String
                             ("extern was not given a DllImport attribute",
                              Regular, tmp.fsx (2,30--2,31) IsSynthetic=false),
                           tmp.fsx (2,30--2,31) IsSynthetic=false),
                        tmp.fsx (2,0--2,31) IsSynthetic=false),
                     App
                       (LongIdent (LongIdentWithDots ([int], [])), None, [], [],
                        None, false, tmp.fsx (2,7--2,10) IsSynthetic=false),
                     tmp.fsx (2,0--2,31) IsSynthetic=false),
                  tmp.fsx (2,0--2,31) IsSynthetic=false, NoneAtInvisible)],
              tmp.fsx (2,0--2,31) IsSynthetic=false)], PreXmlDocEmpty, [], None,
          tmp.fsx (1,0--2,31) IsSynthetic=false)], (true, true)))

Expected behavior

I would expect the range of the SynModuleDecl.Let and SynBinding to include the range of the attribute.

Actual behavior

Range is 2.0 - 2.31, not starting from 1.0 as the attribute does.

Known workarounds

Create a custom range based on other elements.

Related information

Provide any related information (optional):

• Editing Tools (e.g. Visual Studio Version, Visual Studio): FCS 40.