Add Env::make_vector and Env::vector functions

Author: ubolonton

CHANGELOG.md

@@ -4,6 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
+- Added `Env::make_vector` and `Env::vector` functions.
 - Added a default implementation for `Transfer::type_name`. This raised the minimum supported Rust version to 1.38 (for `std::any::type_name()`).
 - Added function to copy a Lisp string's content to a buffer `Value::copy_string_contents`.
 - Deprecated `unwrap_or_propagate`, and marked it as `unsafe`.

src/types/vector.rs

@@ -1,6 +1,7 @@
 use std::convert::TryInto;
 
 use super::*;
+use crate::call::IntoLispArgs;
 
 /// A type that represents Lisp vectors. This is a newtype wrapper around [`Value`] that provides
 /// vector-specific methods.
@@ -68,3 +69,13 @@ impl<'e> IntoLisp<'e> for Vector<'e> {
         Ok(self.0)
     }
 }
+
+impl Env {
+    pub fn make_vector<'e, T: IntoLisp<'e>>(&'e self, length: usize, init: T) -> Result<Vector> {
+        self.call("make-vector", (length, init)).map(Vector)
+    }
+
+    pub fn vector<'e, A: IntoLispArgs<'e>>(&'e self, args: A) -> Result<Vector> {
+        self.call("vector", args).map(Vector)
+    }
+}