bug: Can't parse binary_expression containing 0

[vanessa-rodrigues]

Did you check existing issues?

• I have read all the tree-sitter docs if it relates to using the parser
• I have searched the existing issues of tree-sitter-cpp

Tree-Sitter CLI Version, if relevant (output of tree-sitter --version)

tree-sitter 0.20.8

Describe the bug

Parsing a binary_expression containg a 0 inside a class is leading to a parsing error. The conflict seems to be related with the code introduced in this commit.
This might be related to bug 282

class A
{
	int variable = 0 + 1;
};

Example output:

(translation_unit [0, 0] - [4, 0]
  (class_specifier [0, 0] - [3, 1]
    name: (type_identifier [0, 6] - [0, 7])
    body: (field_declaration_list [1, 0] - [3, 1]
      (field_declaration [2, 1] - [2, 22]
        type: (primitive_type [2, 1] - [2, 4])
        declarator: (field_identifier [2, 5] - [2, 13])
        (ERROR [2, 16] - [2, 17])
        default_value: (unary_expression [2, 18] - [2, 21]
          argument: (number_literal [2, 20] - [2, 21]))))))

Steps To Reproduce/Bad Parse Tree

tree-sitter parse file.cpp

Expected Behavior/Parse Tree

(translation_unit [0, 0] - [4, 0]
  (class_specifier [0, 0] - [3, 1]
    name: (type_identifier [0, 6] - [0, 7])
    body: (field_declaration_list [1, 0] - [3, 1]
      (field_declaration [2, 1] - [2, 22]
        type: (primitive_type [2, 1] - [2, 4])
        declarator: (field_identifier [2, 5] - [2, 13])
        default_value: (binary_expression [2, 16] - [2, 21]
          left: (number_literal [2, 16] - [2, 17])
          right: (number_literal [2, 20] - [2, 21]))))))

Repro

class A
{
    int variable = 0 + 1;
};