add more readable aliases for std fds

2 files changed, 9 insertions, 2 deletions

diff --git a/src/parse/ast.rs b/src/parse/ast.rs
index 37e7fe0..4c65c6a 100644
--- a/src/parse/ast.rs
+++ b/src/parse/ast.rs
@@ -242,7 +242,12 @@ impl Redirect {
                 super::Direction::Out | super::Direction::Append => 1,
             }
         } else {
-            from.parse().unwrap()
+            match from {
+                "in" => 0,
+                "out" => 1,
+                "err" => 2,
+                _ => from.parse().unwrap(),
+            }
         };
         Self { from, to, dir }
     }
diff --git a/src/shell.pest b/src/shell.pest
index 4c5f728..dc3f247 100644
--- a/src/shell.pest
+++ b/src/shell.pest
@@ -14,7 +14,9 @@ var = @{
     ("${" ~ (!"}" ~ ANY)+ ~ "}")
 }
 
-redir_prefix  = @{ ASCII_DIGIT* ~ (">>" | ">" | "<") ~ WHITESPACE* }
+redir_prefix = @{
+    ("in" | "out" | "err" | ASCII_DIGIT*) ~ (">>" | ">" | "<") ~ WHITESPACE*
+}
 bareword      = @{ bareword_char+ }
 single_string = @{ single_string_char+ }
 double_string = @{ double_string_char+ }