ternlang-core 0.3.3

Compiler and VM for Ternlang — balanced ternary language with affirm/tend/reject trit semantics, @sparseskip codegen, and BET bytecode execution.
Documentation 
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// Module:  stdlib/eval/classification_metrics.tern
// Purpose: Classification Metrics (Extended)
// Author:  RFI-IRFOS
// Ref:     https://ternlang.com

// Metrics that handle 'tend' as a valid, separate class of abstention.

fn accuracy_trit(y_true: trit, y_pred: trit) -> trit {
    if y_pred == tend { return tend; } // Abstention
    if y_true == y_pred { return affirm; }
    return reject;
}

fn precision_trit(tp: int, fp: int) -> trit {
    if tp > fp { return affirm; }
    return reject;
}

fn recall_trit(tp: int, fn_count: int) -> trit {
    if tp > fn_count { return affirm; }
    return reject;
}

fn f1_trit(prec: trit, rec: trit) -> trit {
    if prec == affirm {
        if rec == affirm { return affirm; }
    }
    return reject;
}

fn mcc_trit(matrix: trittensor<4 x 4>) -> trit {
    // Matthews correlation coefficient
    return affirm;
}