[cfe-dev] global init-declarator list not parsed as DeclStmt

Firat Kasmis via cfe-dev cfe-dev at lists.llvm.org
Thu Nov 26 12:53:21 PST 2015


I am trying to transform all T a, b, c = ...; to single line declarations:

T a;
T b;
T c = ...;

This works well by matching for DeclStmt and iterating through the
DeclGroup. Unfortunately, a global declared T a, b, c = ...;  does not
result in such a DeclStmt:

int alone;
int alone2 = 3;

int notalone1, notalone2 = 4;

int main(void)
int lalone;
int lalone2 = 3;

int lnotalone1, lnotalone2 = 4;


>> clang-check -ast-dump test.c --
TranslationUnitDecl 0x1742960 <<invalid sloc>> <invalid sloc>
|-TypedefDecl 0x1742e58 <<invalid sloc>> <invalid sloc> implicit __int128_t
|-TypedefDecl 0x1742eb8 <<invalid sloc>> <invalid sloc> implicit
__uint128_t 'unsigned __int128'
|-TypedefDecl 0x1743228 <<invalid sloc>> <invalid sloc> implicit
__builtin_va_list '__va_list_tag [1]'
|-VarDecl 0x1743288 </tmp/test.c:1:1, col:5> col:5 alone 'int'
|-VarDecl 0x1743338 <line:2:1, col:14> col:5 alone2 'int' cinit
| `-IntegerLiteral 0x1743398 <col:14> 'int' 3
|-VarDecl 0x17433c8 <line:4:1, col:5> col:5 notalone1 'int'
|-VarDecl 0x1743438 <col:1, col:28> col:16 notalone2 'int' cinit
| `-IntegerLiteral 0x1743498 <col:28> 'int' 4
`-FunctionDecl 0x1743590 <line:6:1, line:13:1> line:6:5 main 'int (void)'
  `-CompoundStmt 0x1789d80 <line:7:1, line:13:1>
    |-DeclStmt 0x1789b90 <line:8:2, col:12>
    | `-VarDecl 0x1789b30 <col:2, col:6> col:6 lalone 'int'
    |-DeclStmt 0x1789c38 <line:9:2, col:17>
    | `-VarDecl 0x1789bb8 <col:2, col:16> col:6 lalone2 'int' cinit
    |   `-IntegerLiteral 0x1789c18 <col:16> 'int' 3
    `-DeclStmt 0x1789d68 <line:11:2, col:32>
      |-VarDecl 0x1789c60 <col:2, col:6> col:6 lnotalone1 'int'
      `-VarDecl 0x1789cd0 <col:2, col:31> col:18 lnotalone2 'int' cinit
        `-IntegerLiteral 0x1789d30 <col:31> 'int' 4

>> clang-check -version
LLVM (http://llvm.org/):
  LLVM version 3.7.0
  Optimized build.
  Built Oct 31 2015 (11:07:58).
  Default target: x86_64-unknown-linux-gnu
  Host CPU: ivybridge

As you can see, each notalone is a VarDecl whereas VarDecl for lnotaloneX
is grouped in a DeclStmt. Is there any other way to find all the
init-declarator lists?

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