Implemented logic for loops and if statements

src/libsh/utils.rs

@@ -1,6 +1,7 @@
 use std::collections::VecDeque;
 
 use crate::parse::lex::{Span, Tk};
+use crate::parse::{Redir, RedirType};
 use crate::prelude::*;
 
 pub trait VecDequeExt<T> {
@@ -12,6 +13,13 @@ pub trait TkVecUtils<Tk> {
 	fn debug_tokens(&self);
 }
 
+pub trait RedirVecUtils<Redir> {
+	/// Splits the vector of redirections into two vectors
+	///
+	/// One vector contains input redirs, the other contains output redirs
+	fn split_by_channel(self) -> (Vec<Redir>,Vec<Redir>);
+}
+
 impl<T> VecDequeExt<T> for VecDeque<T> {
 	fn to_vec(self) -> Vec<T> {
 		self.into_iter().collect::<Vec<T>>()
@@ -41,3 +49,25 @@ impl<'t> TkVecUtils<Tk<'t>> for Vec<Tk<'t>> {
 		}
 	}
 }
+
+impl RedirVecUtils<Redir> for Vec<Redir> {
+	fn split_by_channel(self) -> (Vec<Redir>,Vec<Redir>) {
+		let mut input = vec![];
+		let mut output = vec![];
+		for redir in self {
+			match redir.class {
+				RedirType::Input => input.push(redir),
+				RedirType::Pipe => {
+					match redir.io_mode.tgt_fd() {
+						STDIN_FILENO => input.push(redir),
+						STDOUT_FILENO |
+							STDERR_FILENO => output.push(redir),
+						_ => unreachable!()
+					}
+				}
+				_ => output.push(redir)
+			}
+		}
+		(input,output)
+	}
+}