Commits on Jul 7, 2021

1. c_parser: support parenthesized compounds …

   Support parenthesized compound statements as described here:
       https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html
   
   Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>

   Jordan Yates committed Jul 7, 2021
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2. test_c_parser: support additional initializers …

   Add support to `expand_init` for additional `c_ast` types. If a type
   is not explicitly handled, return the type name instead of `None`.
   
   Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>

   Jordan Yates committed Jul 7, 2021
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3. test_c_parser: test parenthesized compounds …

   Add parsing tests for various situations of parenthesized compound
   statements. The complete tree generated by the test string is:
   
   ```
   FileAST:
     FuncDef:
       Decl: foo, [], [], []
         FuncDecl:
           TypeDecl: foo, []
             IdentifierType: ['void']
       Compound:
         Decl: a, [], [], []
           TypeDecl: a, []
             IdentifierType: ['int']
         Compound:
         Compound:
           Constant: int, 1
         Compound:
           Constant: int, 1
           Constant: int, 2
         Decl: b, [], [], []
           TypeDecl: b, []
             IdentifierType: ['int']
           Compound:
             Constant: int, 1
         Decl: c, [], [], []
           TypeDecl: c, []
             IdentifierType: ['int']
         Decl: d, [], [], []
           TypeDecl: d, []
             IdentifierType: ['int']
           Compound:
             Decl: x, [], [], []
               TypeDecl: x, []
                 IdentifierType: ['int']
               Constant: int, 1
             BinaryOp: +
               ID: x
               Constant: int, 2
         Assignment: =
           ID: a
           Compound:
             Decl: x, [], [], []
               TypeDecl: x, []
                 IdentifierType: ['int']
               Constant: int, 1
             BinaryOp: *
               Constant: int, 2
               ID: x
   ```
   
   Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>

   Jordan Yates committed Jul 7, 2021
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