Struct Evaluator 

pub struct Evaluator;

Lowerer from parse syntax to semantic document graph.

Examples

use mos_eval::Evaluator;

let evaluator = Evaluator::new();

assert_eq!(format!("{evaluator:?}"), "Evaluator");

Implementations

impl Evaluator

pub fn new() -> Self

Construct an evaluator.

Examples

use mos_eval::Evaluator;

let evaluator = Evaluator::new();

assert_eq!(format!("{evaluator:?}"), "Evaluator");

pub fn evaluate(&self, tree: &SyntaxTree) -> LowerResult

Lower tree into a semantic [Document].

Examples

use std::path::Path;

use mos_core::CollectingSink;
use mos_eval::Evaluator;

let mut sink = CollectingSink::new();
let parse_result = mos_parse::parse("= Hello\n", Path::new("main.mos"), &mut sink);
assert!(
    parse_result.is_ok(),
    "parse structurally aborted: {parse_result:?}"
);
if let Ok(tree) = parse_result {
    let result = Evaluator::new().evaluate(&tree);

    assert_eq!(result.document.len(), 3);
}

Trait Implementations

impl Debug for Evaluator

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Evaluator

fn default() -> Evaluator

Returns the “default value” for a type.