Missing InitListExpr

[useche]

When parsing the following piece of code (taken from uemacs):

struct name_bind {
        char *n_name;
        int (*n_func)(int, int);
};

int ctrlg(int, int);

struct name_bind a[] = {{"a",ctrlg},{"",NULL}};

I don't get the InitListExpression for array a. However, when parsing the code:

int b[] = {1, 2};

I get the list for b just fine.

[marxriedl]

Hi, i will look into it, as soon as I can!

[marxriedl]

Ok, the thing is, atm we can't/don't handle function pointers.
I didn't look too much into how we handle the struct name_bind stuff, but you most certainly won't get the desired result anyway.

Further, I can't promise you when we will be able to add that feature (although it is certainly on my will be eventually added list).

I will close this here, will be fixed by #81.

Still, thanks for reporting and taking an interest in go-clang!

-Markus

[zimmski]

The problem is not go-clang. Clang presents the AST even if there are errors. You can check all problems using the TranslationUnit method Diagnostics. Given your example I get the following error "error: use of undeclared identifier 'NULL'". After including stddef.h I get "fatal error: 'stddef.h' file not found". And after I added the include path of Clang to the ParseTranslationUnit call it works using the following example program:

package main

import (
    "fmt"

    "github.com/go-clang/v3.7/clang"
)

func main() {
    idx := clang.NewIndex(0, 1)
    defer idx.Dispose()

    tu := idx.ParseTranslationUnit("tt.c", []string{"-I", "/usr/lib/clang/3.7/include"}, nil, 0)
    defer tu.Dispose()

    for _, d := range tu.Diagnostics() {
        fmt.Println("Problem:", d.Spelling())
    }

    cursor := tu.TranslationUnitCursor()

    cursor.Visit(func(cursor, parent clang.Cursor) clang.ChildVisitResult {
        if cursor.IsNull() {
            return clang.ChildVisit_Continue
        }

        fmt.Printf("%s: %s (%s)\n", cursor.Kind().Spelling(), cursor.Spelling(), cursor.USR())

        return clang.ChildVisit_Recurse
    })
}

which outputs for your adapted C code the following

TypedefDecl: ptrdiff_t (c:stddef.h@T@ptrdiff_t)
TypedefDecl: size_t (c:stddef.h@T@size_t)
TypedefDecl: wchar_t (c:stddef.h@T@wchar_t)
StructDecl:  (c:@SA@max_align_t)
FieldDecl: __clang_max_align_nonce1 (c:@SA@max_align_t@FI@__clang_max_align_nonce1)
UnexposedAttr:  ()
FieldDecl: __clang_max_align_nonce2 (c:@SA@max_align_t@FI@__clang_max_align_nonce2)
UnexposedAttr:  ()
TypedefDecl: max_align_t (c:__stddef_max_align_t.h@T@max_align_t)
StructDecl:  (c:@SA@max_align_t)
FieldDecl: __clang_max_align_nonce1 (c:@SA@max_align_t@FI@__clang_max_align_nonce1)
UnexposedAttr:  ()
FieldDecl: __clang_max_align_nonce2 (c:@SA@max_align_t@FI@__clang_max_align_nonce2)
UnexposedAttr:  ()
StructDecl: name_bind (c:@S@name_bind)
FieldDecl: n_name (c:@S@name_bind@FI@n_name)
FieldDecl: n_func (c:@S@name_bind@FI@n_func)
ParmDecl:  ()
ParmDecl:  ()
FunctionDecl: ctrlg (c:@F@ctrlg)
ParmDecl:  ()
ParmDecl:  ()
VarDecl: a (c:@a)
TypeRef: struct name_bind ()
InitListExpr:  ()
InitListExpr:  ()
UnexposedExpr:  ()
StringLiteral: "a" ()
UnexposedExpr: ctrlg ()
DeclRefExpr: ctrlg ()
InitListExpr:  ()
UnexposedExpr:  ()
StringLiteral: "" ()
UnexposedExpr:  ()
ParenExpr:  ()
CStyleCastExpr:  ()
IntegerLiteral:  ()

Of course you have to do the same with your program which is using go-clang and your correct include path.