solang-parser 0.2.1

Solang Solidity Parser
Documentation 
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contract C {
    uint immutable x;
    constructor() {
        initX();
    }

    function initX() internal {
        x = 3;
    }
}
// ----
// TypeError 1581: (119-120): Cannot write to immutable here: Immutable variables can only be initialized inline or assigned directly in the constructor.