foo.cc: In function 'int main()':
foo.cc:9:19: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
    9 |         1 <= a, b <= 10 ^ 100;
      |                 ~~^~~~~
foo.cc:9:11: warning: left operand of comma operator has no effect [-Wunused-value]
    9 |         1 <= a, b <= 10 ^ 100;
      |         ~~^~~~
foo.cc:9:25: warning: right operand of comma operator has no effect [-Wunused-value]
    9 |         1 <= a, b <= 10 ^ 100;
      |                 ~~~~~~~~^~~~~

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