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Multiply with parentheses wont work

Reproduction:

use calc::eval;
// ...
println!("{:?}", eval("2*(2*2)"));

Expected behavior: results in 8

Actual behavior: A error with message InvalidOperator('*')

Build information:

  • calc: Latest version from crates.io (0.5.1)
  • rustc -V: rustc 1.33.0 (2aa4c46cf 2019-02-28)
  • System: MacOS Mojave 10.14.4