Hi clang developers,
I wasn't sure if this was the relevant channel to ask this, and I apologize if so.
I've hit a puzzle with an out-of-tree build based on 6.0.0 and was wondering if anyone could share their wisdom on it.
ASTContext::getParents seems to be returning an empty list in a particular case:
Run on ArraySubscriptExpr node looking for Stmt parents.
I have four ArraySubscriptExprs in my AST dump, the faulty one being:
-FunctionDecl 0x6190f58 <line:33:1, line:35:1> line:33:5 used fib 'int
>-ParmVarDecl 0x6190ec8 <col:9, col:13> col:13 used n 'int'$
`-CompoundStmt 0x61915d8 <col:16, line:35:1>$
`-ReturnStmt 0x6191518 <line:34:3, col:13>$
`-ImplicitCastExpr 0x6191460 <col:10, col:13> 'int' <LValueToRValue>$
`-ArraySubscriptExpr 0x6191390 <col:10, col:13> 'int' lvalue$
>-ImplicitCastExpr 0x6191220 <col:10> 'int *'
> \`\-DeclRefExpr 0x6191080 <col:10> 'int \[16\]' lvalue Var
0x618c780 'b' 'int '$
\`\-ImplicitCastExpr 0x61912d8 <col:12> 'int' <LValueToRValue>$ \`\-DeclRefExpr 0x6191150 <col:12> 'int' lvalue ParmVar
0x6190ec8 'n' 'int'$
In this case, getParents returns empty list even though ImplicitCastExpr is clearly a parent and is a Stmt. My modification simply calls "const auto Parents = getContext().getParents<Stmt>(ERef);" in EmitArraySubscriptExpr. Has anyone run into a similar problem before?