Early work on scripting features

src/libsh/utils.rs

@@ -1,11 +1,43 @@
 use std::collections::VecDeque;
 
+use crate::parse::lex::{Span, Tk};
+use crate::prelude::*;
+
 pub trait VecDequeExt<T> {
 	fn to_vec(self) -> Vec<T>;
 }
 
+pub trait TkVecUtils<Tk> {
+	fn get_span(&self) -> Option<Span>;
+	fn debug_tokens(&self);
+}
+
 impl<T> VecDequeExt<T> for VecDeque<T> {
 	fn to_vec(self) -> Vec<T> {
 		self.into_iter().collect::<Vec<T>>()
 	}
 }
+
+impl<'t> TkVecUtils<Tk<'t>> for Vec<Tk<'t>> {
+	fn get_span(&self) -> Option<Span<'t>> {
+		if let Some(first_tk) = self.first() {
+			if let Some(last_tk) = self.last() {
+				Some(
+					Span::new(
+						first_tk.span.start..last_tk.span.end,
+						first_tk.source()
+					)
+				)
+			} else {
+				None
+			}
+		} else {
+			None
+		}
+	}
+	fn debug_tokens(&self) {
+		for token in self {
+			flog!(DEBUG, "token: {}",token)
+		}
+	}
+}