28 lines
770 B
Rust
28 lines
770 B
Rust
use std::{env::args, fs};
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use microlang::{Context, Value};
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pub fn main() {
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// Context instantiation.
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let mut context = Context::empty();
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// Definition of built-in function.
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context.define_built("print", |values, _| {
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for val in values {
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print!("{} ", val.serialize());
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}
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println!();
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Ok(Value::None)
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});
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// Script to evaluate.
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let lines = fs::read_to_string(args().nth(1).expect("Pass a file as arg 1.")).expect("File could not be read.");
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// Script evaluation.
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match context.eval(lines) {
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// May return errors raised during parsing or actual evaluation.
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Err(err) => panic!("Failed : {err:?}"),
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// Success returns the parsed AST alongside the value resulting from the evaluation.
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Ok((_, value)) => println!("{}", value.serialize()),
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}
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}
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