dsntk-evaluator 0.3.0

ÐecisionToolkit | Evaluator
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

//! # Evaluator error definitions

use dsntk_common::{DsntkError, ToErrorMessage};
use dsntk_feel_parser::AstNode;

/// Evaluator error.
#[derive(ToErrorMessage)]
struct EvaluatorError(String);

/// Error reported when the expected node is not an expression list.
pub fn err_expected_expression_list(other: &AstNode) -> DsntkError {
  EvaluatorError(format!("expected expression list, but found '{other}'")).into()
}

/// Error reported when the expression list has not exactly 2 elements.
pub fn err_expected_two_elements_in_expression_list(count: usize) -> DsntkError {
  EvaluatorError(format!("expression list must have exactly 2 elements, found {count}")).into()
}