Add support for Instant for wasm32.

Cargo.toml

@@ -63,3 +63,6 @@ version = "0.3.2"
 default-features = false
 features = ["compile-time-rng"]
 optional = true
+
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+instant= "0.1.4"    # WASM implementation of std::time::Instant

src/any.rs

@@ -27,6 +27,10 @@ use crate::stdlib::{
 #[cfg(not(target_arch = "wasm32"))]
 use crate::stdlib::time::Instant;
 
+#[cfg(not(feature = "no_std"))]
+#[cfg(target_arch = "wasm32")]
+use instant::Instant;
+
 /// Trait to represent any type.
 ///
 /// Currently, `Variant` is not `Send` nor `Sync`, so it can practically be any type.

src/packages/mod.rs

@@ -33,7 +33,6 @@ pub use pkg_std::StandardPackage;
 pub use string_basic::BasicStringPackage;
 pub use string_more::MoreStringPackage;
 #[cfg(not(feature = "no_std"))]
-#[cfg(not(target_arch = "wasm32"))]
 pub use time_basic::BasicTimePackage;
 
 /// Trait that all packages must implement.

src/packages/pkg_std.rs

@@ -6,7 +6,6 @@ use super::math_basic::BasicMathPackage;
 use super::pkg_core::CorePackage;
 use super::string_more::MoreStringPackage;
 #[cfg(not(feature = "no_std"))]
-#[cfg(not(target_arch = "wasm32"))]
 use super::time_basic::BasicTimePackage;
 
 use crate::def_package;
@@ -19,7 +18,6 @@ def_package!(crate:StandardPackage:"_Standard_ package containing all built-in f
     #[cfg(not(feature = "no_object"))]
     BasicMapPackage::init(lib);
     #[cfg(not(feature = "no_std"))]
-    #[cfg(not(target_arch = "wasm32"))]
     BasicTimePackage::init(lib);
     MoreStringPackage::init(lib);
 });

src/packages/time_basic.rs

@@ -1,5 +1,4 @@
-#![cfg(not(target_arch = "wasm32"))]
-
+#![cfg(not(feature = "no_std"))]
 use super::logic::{eq, gt, gte, lt, lte, ne};
 use super::math_basic::MAX_INT;
 
@@ -9,13 +8,15 @@ use crate::parser::INT;
 use crate::result::EvalAltResult;
 use crate::token::Position;
 
-#[cfg(not(feature = "no_std"))]
+#[cfg(not(target_arch = "wasm32"))]
 use crate::stdlib::time::Instant;
 
+#[cfg(target_arch = "wasm32")]
+use instant::Instant;
+
 #[cfg(not(feature = "no_float"))]
 use crate::parser::FLOAT;
 
-#[cfg(not(feature = "no_std"))]
 def_package!(crate:BasicTimePackage:"Basic timing utilities.", lib, {
     // Register date/time functions
     lib.set_fn_0("timestamp", || Ok(Instant::now()));