Merge branch 'master' into plugins

.ci/build.sh

@@ -1,11 +0,0 @@
-#!/bin/bash
-
-set -ex
-
-cargo build --verbose
-cargo test --verbose
-
-if [[ $TRAVIS_RUST_VERSION == "nightly" ]]; then
-    cargo build --verbose --features no_std
-    cargo test --verbose --features no_std
-fi

.github/workflows/build.yml

@@ -0,0 +1,76 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - master
+  pull_request: {}
+
+jobs:
+  # typical build with various feature combinations
+  build:
+    name: Build
+    runs-on: ${{ matrix.os }}
+    continue-on-error: ${{ matrix.experimental }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        flags:
+          - ""
+          - "--features serde"
+          - "--features plugins"
+          - "--features unchecked"
+          - "--features sync"
+          - "--features no_optimize"
+          - "--features no_float"
+          - "--features only_i32"
+          - "--features only_i64"
+          - "--features no_index"
+          - "--features no_object"
+          - "--features no_function"
+          - "--features no_module"
+        toolchain: [stable]
+        experimental: [false]
+        include:
+          # smoketests for future and experimental toolchains
+          - {toolchain: stable, os: windows-latest, experimental: false, flags: ""}
+          - {toolchain: stable, os: macos-latest, experimental: false, flags: ""}
+          - {toolchain: beta, os: ubuntu-latest, experimental: false, flags: ""}
+          - {toolchain: nightly, os: ubuntu-latest, experimental: true, flags: ""}
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Setup Toolchain
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: ${{matrix.toolchain}}
+        override: true
+    - name: Test
+      uses: actions-rs/cargo@v1
+      with:
+        command: test
+        args: --all {{matrix.flags}}
+  # no-std builds are a bit more extensive to test
+  no_std_build:
+    name: NoStdBuild
+    runs-on: ${{matrix.os}}
+    continue-on-error: ${{matrix.experimental}}
+    strategy:
+      matrix:
+        include:
+          - {os: ubuntu-latest, flags: "--profile unix -Z unstable-options", experimental: false}
+          - {os: windows-latest, flags: "--profile windows -Z unstable-options", experimental: true}
+          - {os: macos-latest, flags: "--profile macos -Z unstable-options", experimental: false}
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Setup Toolchain
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: nightly
+        override: true
+    - name: Build Project
+      uses: actions-rs/cargo@v1
+      with:
+        command: build
+        args: --manifest-path=no_std/no_std_test/Cargo.toml ${{matrix.flags}}

.travis.yml

@@ -1,10 +0,0 @@
-language: rust
-rust:
-  - stable
-  - beta
-  - nightly
-matrix:
-  allow_failures:
-    - rust: nightly
-
-script: bash ./.ci/build.sh

README.md

@@ -2,7 +2,7 @@ Rhai - Embedded Scripting for Rust
 =================================
 
 ![GitHub last commit](https://img.shields.io/github/last-commit/jonathandturner/rhai)
-[![Travis (.org)](https://img.shields.io/travis/jonathandturner/rhai)](http://travis-ci.org/jonathandturner/rhai)
+[![Build Status](https://github.com/jonathandturner/rhai/workflows/Build/badge.svg)](https://github.com/jonathandturner/rhai/actions)
 [![license](https://img.shields.io/github/license/jonathandturner/rhai)](https://github.com/license/jonathandturner/rhai)
 [![crates.io](https://img.shields.io/crates/v/rhai.svg)](https://crates.io/crates/rhai/)
 [![crates.io](https://img.shields.io/crates/d/rhai)](https://crates.io/crates/rhai/)
@@ -73,7 +73,7 @@ Licensed under either:
 * [Apache License, Version 2.0](https://github.com/jonathandturner/rhai/blob/master/LICENSE-APACHE.txt), or
 * [MIT license](https://github.com/jonathandturner/rhai/blob/master/LICENSE-MIT.txt)
 
-at your option.
+at your choice.
 
 Unless explicitly stated otherwise, any contribution intentionally submitted
 for inclusion in this crate, as defined in the Apache-2.0 license, shall

doc/src/SUMMARY.md

@@ -5,8 +5,9 @@ The Rhai Scripting Language
    1. [Features](about/features.md)
    2. [Supported Targets and Builds](about/targets.md)
    3. [What Rhai Isn't](about/non-design.md)
-   4. [Related Resources](about/related.md)
+   4. [Licensing](about/license.md)
-3. [Getting Started](start/index.md)
+   5. [Related Resources](about/related.md)
+2. [Getting Started](start/index.md)
    1. [Online Playground](start/playground.md)
    2. [Install the Rhai Crate](start/install.md)
    3. [Optional Features](start/features.md)
@@ -18,14 +19,14 @@ The Rhai Scripting Language
    5. [Examples](start/examples/index.md)
       1. [Rust](start/examples/rust.md)
       2. [Scripts](start/examples/scripts.md)
-4. [Using the `Engine`](engine/index.md)
+3. [Using the `Engine`](engine/index.md)
    1. [Hello World in Rhai - Evaluate a Script](engine/hello-world.md)
-   2. [Compile a Script to AST for Repeated Evaluations](engine/compile.md)
+   2. [Compile to AST for Repeated Evaluations](engine/compile.md)
    3. [Call a Rhai Function from Rust](engine/call-fn.md)
    4. [Create a Rust Anonymous Function from a Rhai Function](engine/func.md)
    5. [Evaluate Expressions Only](engine/expressions.md)
    6. [Raw Engine](engine/raw.md)
-5. [Extend Rhai with Rust](rust/index.md)
+4. [Extend Rhai with Rust](rust/index.md)
    1. [Traits](rust/traits.md)
    2. [Register a Rust Function](rust/functions.md)
       1. [String Parameters in Rust Functions](rust/strings.md)
@@ -43,7 +44,7 @@ The Rhai Scripting Language
       4. [Printing Custom Types](rust/print-custom.md)
    9. [Scope - Initializing and Maintaining State](rust/scope.md)
    10. [Engine Configuration Options](rust/options.md)
-6. [Rhai Language Reference](language/index.md)
+5. [Rhai Language Reference](language/index.md)
    1. [Comments](language/comments.md)
    2. [Values and Types](language/values-and-types.md)
       1. [Dynamic Values](language/dynamic.md)
@@ -64,28 +65,29 @@ The Rhai Scripting Language
    5. [Variables](language/variables.md)
    6. [Constants](language/constants.md)
    7. [Logic Operators](language/logic.md)
-   8. [If Statement](language/if.md)
+   8. [Other Operators](language/other-op.md)
-   9. [While Loop](language/while.md)
+   9. [If Statement](language/if.md)
-   10. [Loop Statement](language/loop.md)
+   10. [While Loop](language/while.md)
-   11. [For Loop](language/for.md)
+   11. [Loop Statement](language/loop.md)
-   12. [Return Values](language/return.md)
+   12. [For Loop](language/for.md)
-   13. [Throw Exception on Error](language/throw.md)
+   13. [Return Values](language/return.md)
-   14. [Functions](language/functions.md)
+   14. [Throw Exception on Error](language/throw.md)
+   15. [Functions](language/functions.md)
        1. [Call Method as Function](language/method.md)
        2. [Overloading](language/overload.md)
        3. [Namespaces](language/fn-namespaces.md)
        4. [Function Pointers](language/fn-ptr.md)
        5. [Anonymous Functions](language/fn-anon.md)
        6. [Currying](language/fn-curry.md)
-   15. [Print and Debug](language/print-debug.md)
+   16. [Print and Debug](language/print-debug.md)
-   16. [Modules](language/modules/index.md)
+   17. [Modules](language/modules/index.md)
        1. [Export Variables, Functions and Sub-Modules](language/modules/export.md)
        2. [Import Modules](language/modules/import.md)
        3. [Create from Rust](rust/modules/index.md)
        4. [Create from AST](language/modules/ast.md)
        5. [Module Resolvers](rust/modules/resolvers.md)
           1. [Custom Implementation](rust/modules/imp-resolver.md)
-7. [Safety and Protection](safety/index.md)
+6. [Safety and Protection](safety/index.md)
    1. [Checked Arithmetic](safety/checked.md)
    2. [Sand-Boxing](safety/sandbox.md)
    3. [Maximum Length of Strings](safety/max-string-size.md)
@@ -96,7 +98,7 @@ The Rhai Scripting Language
    7. [Maximum Number of Modules](safety/max-modules.md)
    8. [Maximum Call Stack Depth](safety/max-call-stack.md)
    9. [Maximum Statement Depth](safety/max-stmt-depth.md)
-8. [Advanced Topics](advanced.md)
+7. [Advanced Topics](advanced.md)
    1. [Object-Oriented Programming (OOP)](language/oop.md)
    2. [Serialization/Deserialization of `Dynamic` with `serde`](rust/serde.md)
    3. [Script Optimization](engine/optimize/index.md)
@@ -112,7 +114,7 @@ The Rhai Scripting Language
       2. [Custom Operators](engine/custom-op.md)
       3. [Extending with Custom Syntax](engine/custom-syntax.md)
    6. [Eval Statement](language/eval.md)
-9. [Appendix](appendix/index.md)
+8. [Appendix](appendix/index.md)
    1. [Keywords](appendix/keywords.md)
    2. [Operators and Symbols](appendix/operators.md)
    3. [Literals](appendix/literals.md)

doc/src/about/index.md

@@ -7,6 +7,9 @@ Rhai is an embedded scripting language and evaluation engine for Rust that gives
 to add scripting to any application.
 
 
-This Book is for version {{version}} of Rhai.
+Versions
+--------
+
+This Book is for version **{{version}}** of Rhai.
 
 For the latest development version, see [here]({{rootUrl}}/vnext/).

doc/src/about/license.md

@@ -0,0 +1,16 @@
+Licensing
+=========
+
+{{#include ../links.md}}
+
+Rhai is licensed under either:
+
+* [Apache License, Version 2.0]({{repoHome}}/LICENSE-APACHE.txt), or
+
+* [MIT license]({{repoHome}}/LICENSE-MIT.txt)
+
+at your choice.
+
+Unless explicitly stated otherwise, any contribution intentionally submitted for inclusion in this crate,
+as defined in the Apache-2.0 license, shall be dual-licensed as above,
+without any additional terms or conditions.

doc/src/about/non-design.md

@@ -18,21 +18,38 @@ It doesn't attempt to be a new language. For example:
 
 * No first-class functions - Code your functions in Rust instead, and register them with Rhai.
 
-  There is, however, support for simple [function pointers] allowing runtime dispatch by function name.
+  There is, however, support for simple [function pointers] to allow runtime dispatch by function name.
 
 * No garbage collection - this should be expected, so...
 
 * No closures - do your closure magic in Rust instead; [turn a Rhai scripted function into a Rust closure]({{rootUrl}}/engine/call-fn.md).
 
+  But you can [curry][currying] a [function pointer] with arguments to simulate it somewhat.
+
 * No byte-codes/JIT - Rhai has an AST-walking interpreter which will not win any speed races. The purpose of Rhai is not
   to be extremely _fast_, but to make it as easy as possible to integrate with native Rust applications.
 
+
+Do Not Write The Next 4D VR Game in Rhai
+---------------------------------------
+
 Due to this intended usage, Rhai deliberately keeps the language simple and small by omitting advanced language features
 such as classes, inheritance, first-class functions, closures, concurrency, byte-codes, JIT etc.
 
 Avoid the temptation to write full-fledge application logic entirely in Rhai - that use case is best fulfilled by
 more complete languages such as JavaScript or Lua.
 
-Therefore, in actual practice, it is usually best to expose a Rust API into Rhai for scripts to call.
+
-All your core functionalities should be in Rust.
+Thin Dynamic Wrapper Layer Over Rust Code
+----------------------------------------
+
+In actual practice, it is usually best to expose a Rust API into Rhai for scripts to call.
+
+All the core functionalities should be written in Rust, with Rhai being the dynamic _control_ layer.
+
 This is similar to some dynamic languages where most of the core functionalities reside in a C/C++ standard library.
+
+Another similar scenario is a web front-end driving back-end services written in a systems language.
+In this case, JavaScript takes the role of Rhai while the back-end language, well... it can actually also be Rust.
+Except that Rhai integrates with Rust _much_ more tightly, removing the need for interfaces such
+as XHR calls and payload encoding such as JSON.

doc/src/advanced.md

@@ -5,7 +5,7 @@ Advanced Topics
 
 This section covers advanced features such as:
 
-* Simulated [Object Oriented Programming][OOP].
+* Simulated [Object Oriented Programming (OOP)][OOP].
 
 * [`serde`] integration.
 
@@ -13,4 +13,6 @@ This section covers advanced features such as:
 
 * [Domain-Specific Languages][DSL].
 
+* Low-level [function registration API]({{rootUrl}}/rust/register-raw.md)
+
 * The dreaded (or beloved for those with twisted tastes) [`eval`] statement.

doc/src/context.json

@@ -1,5 +1,7 @@
 {
 	"version": "0.18.0",
+	"repoHome": "https://github.com/jonathandturner/rhai/blob/master",
+	"repoTree": "https://github.com/jonathandturner/rhai/tree/master",
 	"rootUrl": "",
 	"rootUrlX": "/rhai",
 	"rootUrlXX": "/rhai/vnext"

doc/src/engine/hello-world.md

@@ -22,19 +22,31 @@ fn main() -> Result<(), Box<EvalAltResult>>
 }
 ```
 
-`rhai::EvalAltResult` is a Rust `enum` containing all errors encountered during the parsing or evaluation process.
+Evaluate a script file directly:
+
+```rust
+// 'eval_file' takes a 'PathBuf'
+let result = engine.eval_file::<i64>("hello_world.rhai".into())?;
+```
 
 
-Evaluate a Script
+Error Type
-----------------
+----------
 
-The type parameter is used to specify the type of the return value, which _must_ match the actual type or an error is returned.
+`rhai::EvalAltResult` is the standard Rhai error type, which is a Rust `enum` containing all errors encountered
-Rhai is very strict here.
+during the parsing or evaluation process.
 
-Use [`Dynamic`] for uncertain return types.
+
+Return Type
+-----------
+
+The type parameter for `Engine::eval` is used to specify the type of the return value,
+which _must_ match the actual type or an error is returned. Rhai is very strict here.
 
 There are two ways to specify the return type - _turbofish_ notation, or type inference.
 
+Use [`Dynamic`] for uncertain return types.
+
 ```rust
 let result = engine.eval::<i64>("40 + 2")?;     // return type is i64, specified using 'turbofish' notation
 
@@ -46,9 +58,3 @@ let result: Dynamic = engine.eval("boo()")?;    // use 'Dynamic' if you're not s
 
 let result = engine.eval::<String>("40 + 2")?;  // returns an error because the actual return type is i64, not String
 ```
-
-Evaluate a script file directly:
-
-```rust
-let result = engine.eval_file::<i64>("hello_world.rhai".into())?;   // 'eval_file' takes a 'PathBuf'
-```

doc/src/engine/raw.md

@@ -10,7 +10,10 @@ In many controlled embedded environments, however, these may not be needed and u
 application code storage space.
 
 Use `Engine::new_raw` to create a _raw_ `Engine`, in which only a minimal set of
-basic arithmetic and logical operators are supported.
+basic arithmetic and logical operators are supported (see below).
+
+To add more functionalities to a _raw_ `Engine`, load [packages] into it.
+
 
 Built-in Operators
 ------------------
@@ -20,7 +23,7 @@ Built-in Operators
 | `+`,                     | `+=`                         | `INT`, `FLOAT` (if not [`no_float`]), `ImmutableString`                       |
 | `-`, `*`, `/`, `%`, `~`, | `-=`, `*=`, `/=`, `%=`, `~=` | `INT`, `FLOAT` (if not [`no_float`])                                          |
 | `<<`, `>>`, `^`,         | `<<=`, `>>=`, `^=`           | `INT`                                                                         |
-| `&`, `|`,                | `&=`, `|=`                   | `INT`, `bool`                                                                 |
+| `&`, <code>\|</code>,    | `&=`, <code>\|=</code>       | `INT`, `bool`                                                                 |
-| `&&`, `||`               |                              | `bool`                                                                        |
+| `&&`, <code>\|\|</code>  |                              | `bool`                                                                        |
 | `==`, `!=`               |                              | `INT`, `FLOAT` (if not [`no_float`]), `bool`, `char`, `()`, `ImmutableString` |
 | `>`, `>=`, `<`, `<=`     |                              | `INT`, `FLOAT` (if not [`no_float`]), `char`, `()`, `ImmutableString`         |

doc/src/language/for.md

@@ -3,7 +3,8 @@
 
 {{#include ../links.md}}
 
-Iterating through a range or an [array] is provided by the `for` ... `in` loop.
+Iterating through a range or an [array], or any type with a registered _iterator_,
+is provided by the `for` ... `in` loop.
 
 Like C, `continue` can be used to skip to the next iteration, by-passing all following statements;
 `break` can be used to break out of the loop unconditionally.

doc/src/language/if.md

@@ -19,6 +19,9 @@ if foo(x) {
 }
 ```
 
+Braces Are Mandatory
+--------------------
+
 Unlike C, the condition expression does _not_ need to be enclosed in parentheses '`(`' .. '`)`', but
 all branches of the `if` statement must be enclosed within braces '`{`' .. '`}`',
 even when there is only one statement inside the branch.

doc/src/language/logic.md

@@ -65,42 +65,3 @@ a() | b();              // both a() and b() are evaluated
 
 a() & b();              // both a() and b() are evaluated
 ```
-
-Compound Assignment Operators
-----------------------------
-
-```rust
-let number = 9;
-
-number += 8;            // number = number + 8
-
-number -= 7;            // number = number - 7
-
-number *= 6;            // number = number * 6
-
-number /= 5;            // number = number / 5
-
-number %= 4;            // number = number % 4
-
-number ~= 3;            // number = number ~ 3
-
-number <<= 2;           // number = number << 2
-
-number >>= 1;           // number = number >> 1
-
-number &= 0x00ff;       // number = number & 0x00ff;
-
-number |= 0x00ff;       // number = number | 0x00ff;
-
-number ^= 0x00ff;       // number = number ^ 0x00ff;
-```
-
-The `+=` operator can also be used to build [strings]:
-
-```rust
-let my_str = "abc";
-my_str += "ABC";
-my_str += 12345;
-
-my_str == "abcABC12345"
-```

doc/src/language/method.md

@@ -4,8 +4,8 @@ Call Method as Function
 {{#include ../links.md}}
 
 
-First `&mut` Reference Parameter
+First `&mut` Parameter
--------------------------------
+----------------------
 
 Property [getters/setters] and [methods][custom types] in a Rust custom type registered with the [`Engine`] can be called
 just like a regular function.  In fact, like Rust, property getters/setters and object methods
@@ -37,19 +37,20 @@ array[0].update();  // <- call in method-call style will update 'a'
 ```
 
 
-Encouraged Usage
+`&mut` is Efficient
-----------------
+------------------
 
 Using a `&mut` first parameter is highly encouraged when using types that are expensive to clone,
 even when the intention is not to mutate that argument, because it avoids cloning that argument value.
 
-For primary types that are cheap to clone, including `ImmutableString`, this is not necessary.
+For primary types that are cheap to clone (e.g. those that implement `Copy`),
+including `ImmutableString`, this is not necessary.
 
 
 Avoid `&mut ImmutableString`
 ---------------------------
 
-`ImmutableString`, Rhai internal [string] type, is an exception.
+`ImmutableString`, Rhai's internal [string] type, is an exception.
 
 `ImmutableString` is cheap to clone, but expensive to take a mutable reference (because the underlying
 string must be cloned to make a private copy).

doc/src/language/other-op.md

@@ -0,0 +1,66 @@
+Other Operators
+===============
+
+{{#include ../links.md}}
+
+
+Compound Assignment Operators
+----------------------------
+
+```rust
+let number = 9;
+
+number += 8;            // number = number + 8
+
+number -= 7;            // number = number - 7
+
+number *= 6;            // number = number * 6
+
+number /= 5;            // number = number / 5
+
+number %= 4;            // number = number % 4
+
+number ~= 3;            // number = number ~ 3
+
+number <<= 2;           // number = number << 2
+
+number >>= 1;           // number = number >> 1
+
+number &= 0x00ff;       // number = number & 0x00ff;
+
+number |= 0x00ff;       // number = number | 0x00ff;
+
+number ^= 0x00ff;       // number = number ^ 0x00ff;
+```
+
+
+The Flexible `+=`
+----------------
+
+The `+=` operator can also be used to build [strings]:
+
+```rust
+let my_str = "abc";
+my_str += "ABC";
+my_str += 12345;
+
+my_str == "abcABC12345"
+```
+
+It may also be used to concatenate [arrays]:
+
+```rust
+let my_array = [1, 2, 3];
+my_array += [4, 5];
+
+my_array == [1, 2, 3, 4, 5];
+```
+
+or mix two [object maps] together:
+
+```rust
+let my_obj = #{a:1, b:2};
+my_obj += #{c:3, d:4, e:5};
+
+my_obj.len() == 5;
+```

doc/src/rust/custom.md

@@ -66,8 +66,8 @@ let mut engine = Engine::new();
 engine.register_type::<TestStruct>();
 ```
 
-Methods on Custom Type
+Methods on The Custom Type
----------------------
+-------------------------
 
 To use native custom types, methods and functions in Rhai scripts, simply register them
 using one of the `Engine::register_XXX` API.

doc/src/rust/modules/imp-resolver.md

@@ -30,7 +30,7 @@ impl ModuleResolver for MyModuleResolver {
         &self,
         engine: &Engine,    // reference to the current 'Engine'
         path: &str,         // the module path
-        pos: Position,      // location of the 'import' statement
+        pos: Position,      // position of the 'import' statement
     ) -> Result<Module, Box<EvalAltResult>> {
         // Check module path.
         if is_valid_module_path(path) {

doc/src/rust/override.md

@@ -12,7 +12,9 @@ fn to_int(num) {
     print("Ha! Gotcha! " + num);
 }
 
-print(to_int(123));     // what happens?
+let x = (123).to_int();
+
+print(x);               // what happens?
 ```
 
 A registered native Rust function, in turn, overrides any built-in function of the

doc/src/start/builds/performance.md

@@ -37,8 +37,8 @@ Use `ImmutableString`
 Internally, Rhai uses _immutable_ [strings] instead of the Rust `String` type.  This is mainly to avoid excessive
 cloning when passing function arguments.
 
-The encapsulated immutable string type is `ImmutableString`.  It is cheap to clone (just an `Rc` or `Arc` reference
+Rhai's internal string type is `ImmutableString` (basically `Rc<String>` or `Arc<String>` depending on the [`sync`] feature).
-count increment depending on the [`sync`] feature).
+It is cheap to clone, but expensive to modify (a new copy of the string must be made in order to change it).
 
 Therefore, functions taking `String` parameters should use `ImmutableString` or `&str` (which maps to `ImmutableString`)
 for the best performance with Rhai.

doc/src/start/examples/rust.md

@@ -6,16 +6,16 @@ Rust Examples
 A number of examples can be found in the `examples` directory:
 
 | Example                                                                         | Description                                                                                                                                   |
-| ---------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------- |
+| ------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------- |
-| [`arrays_and_structs`](https://github.com/jonathandturner/rhai/tree/master/examples/arrays_and_structs.rs)             | Shows how to register a custom Rust type and using [arrays] on it.                                                                            |
+| [`arrays_and_structs`]({{repoTree}}/examples/arrays_and_structs.rs)             | Shows how to register a custom Rust type and using [arrays] on it.                                                                            |
-| [`custom_types_and_methods`](https://github.com/jonathandturner/rhai/tree/master/examples/custom_types_and_methods.rs) | Shows how to register a custom Rust type and methods for it.                                                                                  |
+| [`custom_types_and_methods`]({{repoTree}}/examples/custom_types_and_methods.rs) | Shows how to register a custom Rust type and methods for it.                                                                                  |
-| [`hello`](https://github.com/jonathandturner/rhai/tree/master/examples/hello.rs)                                       | Simple example that evaluates an expression and prints the result.                                                                            |
+| [`hello`]({{repoTree}}/examples/hello.rs)                                       | Simple example that evaluates an expression and prints the result.                                                                            |
-| [`reuse_scope`](https://github.com/jonathandturner/rhai/tree/master/examples/reuse_scope.rs)                           | Evaluates two pieces of code in separate runs, but using a common [`Scope`].                                                                  |
+| [`reuse_scope`]({{repoTree}}/examples/reuse_scope.rs)                           | Evaluates two pieces of code in separate runs, but using a common [`Scope`].                                                                  |
-| [`rhai_runner`](https://github.com/jonathandturner/rhai/tree/master/examples/rhai_runner.rs)                           | Runs each filename passed to it as a Rhai script.                                                                                             |
+| [`rhai_runner`]({{repoTree}}/examples/rhai_runner.rs)                           | Runs each filename passed to it as a Rhai script.                                                                                             |
-| [`serde`](https://github.com/jonathandturner/rhai/tree/master/examples/serde.rs)                                       | Example to serialize and deserialize Rust types with [`serde`](https://crates.io/crates/serde).<br/>The [`serde`] feature is required to run. |
+| [`serde`]({{repoTree}}/examples/serde.rs)                                       | Example to serialize and deserialize Rust types with [`serde`](https://crates.io/crates/serde).<br/>The [`serde`] feature is required to run. |
-| [`simple_fn`](https://github.com/jonathandturner/rhai/tree/master/examples/simple_fn.rs)                               | Shows how to register a simple function.                                                                                                      |
+| [`simple_fn`]({{repoTree}}/examples/simple_fn.rs)                               | Shows how to register a simple function.                                                                                                      |
-| [`strings`](https://github.com/jonathandturner/rhai/tree/master/examples/strings.rs)                                   | Shows different ways to register functions taking string arguments.                                                                           |
+| [`strings`]({{repoTree}}/examples/strings.rs)                                   | Shows different ways to register functions taking string arguments.                                                                           |
-| [`repl`](https://github.com/jonathandturner/rhai/tree/master/examples/repl.rs)                                         | A simple REPL, interactively evaluate statements from stdin.                                                                                  |
+| [`repl`]({{repoTree}}/examples/repl.rs)                                         | A simple REPL, interactively evaluate statements from stdin.                                                                                  |
 
 The `repl` example is a particularly good one as it allows one to interactively try out Rhai's
 language features in a standard REPL (**R**ead-**E**val-**P**rint **L**oop).
@@ -36,8 +36,8 @@ cargo run --example {example_name}
 To illustrate `no-std` builds, a number of sample applications are available under the `no_std` directory:
 
 | Sample                                           | Description                                                                                           | Optimization |                     Allocator                     | Panics |
-| --------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------- | :----------: | :-----------------------------------------------: | :----: |
+| ------------------------------------------------ | ----------------------------------------------------------------------------------------------------- | :----------: | :-----------------------------------------------: | :----: |
-| [`no_std_test`](https://github.com/jonathandturner/rhai/tree/master/no_std/no_std_test) | Bare-bones test application that evaluates a Rhai expression and sets the result as the return value. |     Size     | [`wee_alloc`](https://crates.io/crates/wee_alloc) | Abort  |
+| [`no_std_test`]({{repoTree}}/no_std/no_std_test) | Bare-bones test application that evaluates a Rhai expression and sets the result as the return value. |     Size     | [`wee_alloc`](https://crates.io/crates/wee_alloc) | Abort  |
 
 `cargo run` cannot be used to run a `no-std` sample.  It must first be built:
 

doc/src/start/examples/scripts.md

@@ -9,24 +9,24 @@ Language Feature Scripts
 There are also a number of examples scripts that showcase Rhai's features, all in the `scripts` directory:
 
 | Script                                                            | Description                                                                                 |
-| -------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------- |
+| ----------------------------------------------------------------- | ------------------------------------------------------------------------------------------- |
-| [`array.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/array.rhai)                   | [Arrays]                                                                                    |
+| [`array.rhai`]({{repoTree}}/scripts/array.rhai)                   | [Arrays]                                                                                    |
-| [`assignment.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/assignment.rhai)         | Variable declarations                                                                       |
+| [`assignment.rhai`]({{repoTree}}/scripts/assignment.rhai)         | Variable declarations                                                                       |
-| [`comments.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/comments.rhai)             | Just comments                                                                               |
+| [`comments.rhai`]({{repoTree}}/scripts/comments.rhai)             | Just comments                                                                               |
-| [`for1.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/for1.rhai)                     | [`for`]({{rootUrl}}/language/for.md) loops                                                  |
+| [`for1.rhai`]({{repoTree}}/scripts/for1.rhai)                     | [`for`]({{rootUrl}}/language/for.md) loops                                                  |
-| [`for2.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/for2.rhai)                     | [`for`]({{rootUrl}}/language/for.md) loops on [arrays]                                      |
+| [`for2.rhai`]({{repoTree}}/scripts/for2.rhai)                     | [`for`]({{rootUrl}}/language/for.md) loops on [arrays]                                      |
-| [`function_decl1.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/function_decl1.rhai) | A [function] without parameters                                                             |
+| [`function_decl1.rhai`]({{repoTree}}/scripts/function_decl1.rhai) | A [function] without parameters                                                             |
-| [`function_decl2.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/function_decl2.rhai) | A [function] with two parameters                                                            |
+| [`function_decl2.rhai`]({{repoTree}}/scripts/function_decl2.rhai) | A [function] with two parameters                                                            |
-| [`function_decl3.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/function_decl3.rhai) | A [function] with many parameters                                                           |
+| [`function_decl3.rhai`]({{repoTree}}/scripts/function_decl3.rhai) | A [function] with many parameters                                                           |
-| [`if1.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/if1.rhai)                       | [`if`]({{rootUrl}}/language/if.md) example                                                  |
+| [`if1.rhai`]({{repoTree}}/scripts/if1.rhai)                       | [`if`]({{rootUrl}}/language/if.md) example                                                  |
-| [`loop.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/loop.rhai)                     | Count-down [`loop`]({{rootUrl}}/language/loop.md) in Rhai, emulating a `do` .. `while` loop |
+| [`loop.rhai`]({{repoTree}}/scripts/loop.rhai)                     | Count-down [`loop`]({{rootUrl}}/language/loop.md) in Rhai, emulating a `do` .. `while` loop |
-| [`oop.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/oop.rhai)                       | Simulate [object-oriented programming (OOP)][OOP]                                           |
+| [`oop.rhai`]({{repoTree}}/scripts/oop.rhai)                       | Simulate [object-oriented programming (OOP)][OOP]                                           |
-| [`op1.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/op1.rhai)                       | Just simple addition                                                                        |
+| [`op1.rhai`]({{repoTree}}/scripts/op1.rhai)                       | Just simple addition                                                                        |
-| [`op2.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/op2.rhai)                       | Simple addition and multiplication                                                          |
+| [`op2.rhai`]({{repoTree}}/scripts/op2.rhai)                       | Simple addition and multiplication                                                          |
-| [`op3.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/op3.rhai)                       | Change evaluation order with parenthesis                                                    |
+| [`op3.rhai`]({{repoTree}}/scripts/op3.rhai)                       | Change evaluation order with parenthesis                                                    |
-| [`string.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/string.rhai)                 | [String] operations                                                                         |
+| [`string.rhai`]({{repoTree}}/scripts/string.rhai)                 | [String] operations                                                                         |
-| [`strings_map.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/strings_map.rhai)       | [String] and [object map] operations                                                        |
+| [`strings_map.rhai`]({{repoTree}}/scripts/strings_map.rhai)       | [String] and [object map] operations                                                        |
-| [`while.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/while.rhai)                   | [`while`]({{rootUrl}}/language/while.md) loop                                               |
+| [`while.rhai`]({{repoTree}}/scripts/while.rhai)                   | [`while`]({{rootUrl}}/language/while.md) loop                                               |
 
 
 Benchmark Scripts
@@ -35,11 +35,11 @@ Benchmark Scripts
 The following scripts are for benchmarking the speed of Rhai:
 
 | Scripts                                                   | Description                                                                             |
-| ------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------- |
+| --------------------------------------------------------- | --------------------------------------------------------------------------------------- |
-| [`speed_test.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/speed_test.rhai) | A simple application to measure the speed of Rhai's interpreter (1 million iterations). |
+| [`speed_test.rhai`]({{repoTree}}/scripts/speed_test.rhai) | A simple application to measure the speed of Rhai's interpreter (1 million iterations). |
-| [`primes.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/primes.rhai)         | Use Sieve of Eratosthenes to find all primes smaller than a limit.                      |
+| [`primes.rhai`]({{repoTree}}/scripts/primes.rhai)         | Use Sieve of Eratosthenes to find all primes smaller than a limit.                      |
-| [`fibonacci.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/fibonacci.rhai)   | Calculate the n-th Fibonacci number using a really dumb algorithm.                      |
+| [`fibonacci.rhai`]({{repoTree}}/scripts/fibonacci.rhai)   | Calculate the n-th Fibonacci number using a really dumb algorithm.                      |
-| [`mat_mul.rhai`](https://github.com/jonathandturner/rhai/tree/master/scripts/mat_mul.rhai)       | Matrix multiplication test to measure the speed of multi-dimensional array access.      |
+| [`mat_mul.rhai`]({{repoTree}}/scripts/mat_mul.rhai)       | Matrix multiplication test to measure the speed of multi-dimensional array access.      |
 
 
 Running Example Scripts

doc/src/start/features.md

@@ -25,7 +25,7 @@ more control over what a script can (or cannot) do.
 | `no_module`   | Disable loading external [modules].                                                                                                                                                                        |
 | `no_std`      | Build for `no-std`. Notice that additional dependencies will be pulled in to replace `std` features.                                                                                                       |
 | `serde`       | Enable serialization/deserialization via [`serde`]. Notice that the [`serde`](https://crates.io/crates/serde) crate will be pulled in together with its dependencies.                                      |
-| `internals`   | Expose internal data structures (e.g. [`AST`] nodes) and enable defining [custom syntax]. Beware that Rhai internals are volatile and may change from version to version.                                  |
+| `internals`   | Expose internal data structures (e.g. [`AST`] nodes). Beware that Rhai internals are volatile and may change from version to version.                                                                      |
 
 
 Example
@@ -46,7 +46,7 @@ rhai = { version = "{{version}}", features = [ "sync", "unchecked", "only_i32",
 ```
 
 The resulting scripting engine supports only the `i32` integer numeral type (and no others like `u32`, `i16` or `i64`),
-no floating-point, is `Send + Sync` (so it can be safely used across threads), does not support defining [functions]
+no floating-point, is `Send + Sync` (so it can be safely used across threads), and does not support defining [functions]
 nor loading external [modules].
 
 This configuration is perfect for an expression parser in a 32-bit embedded system without floating-point hardware.

no_std/no_std_test/Cargo.toml

@@ -1,10 +1,12 @@
+cargo-features = ["named-profiles"]
+
 [package]
 name = "no_std_test"
 version = "0.1.0"
 edition = "2018"
 authors = ["Stephen Chung"]
 description = "no-std test application"
-homepage = "https://github.com/jonathandturner/rhai/tree/master/no_std/no_std_test"
+homepage = "https://github.com/jonathandturner/rhai/tree/no_std/no_std_test"
 repository = "https://github.com/jonathandturner/rhai"
 
 [dependencies]
@@ -18,7 +20,17 @@ panic = "abort"
 opt-level = "z"             # optimize for size
 debug = false
 rpath = false
-lto = "fat"
 debug-assertions = false
 codegen-units = 1
 panic = "abort"
+
+[profile.unix]
+inherits = "release"
+lto = true
+
+[profile.windows]
+inherits = "release"
+
+[profile.macos]
+inherits = "release"
+lto = "fat"

no_std/no_std_test/README.md

@@ -12,7 +12,9 @@ To Compile
 The nightly compiler is required:
 
 ```bash
-cargo +nightly build --release
+cargo +nightly build --release --profile unix -Z unstable-features
 ```
 
+Available profiles are: `unix`, `windows` and `macos`.
+
 The release build is optimized for size.  It can be changed to optimize on speed instead.

no_std/no_std_test/src/main.rs

@@ -2,7 +2,7 @@
 //! a simple expression and uses the result as the return value.
 
 #![no_std]
-#![feature(alloc_error_handler, start, core_intrinsics, lang_items)]
+#![feature(alloc_error_handler, start, core_intrinsics, lang_items, link_cfg)]
 
 extern crate alloc;
 extern crate wee_alloc;
@@ -10,6 +10,12 @@ extern crate wee_alloc;
 #[global_allocator]
 static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
 
+// NB: Rust needs a CRT runtime on Windows MSVC.
+#[cfg(all(windows, target_env = "msvc"))]
+#[link(name = "msvcrt")]
+#[link(name = "libcmt")]
+extern {}
+
 use rhai::{Engine, INT};
 
 #[start]

src/engine.rs

@@ -639,9 +639,7 @@ impl Engine {
                                 )
                                 .or_else(|err| match *err {
                                     // If there is no index setter, no need to set it back because the indexer is read-only
-                                    EvalAltResult::ErrorFunctionNotFound(s, _)
+                                    EvalAltResult::ErrorFunctionNotFound(_, _) => {
-                                        if s == FN_IDX_SET =>
-                                    {
                                         Ok(Default::default())
                                     }
                                     _ => Err(err),

src/fn_call.rs

@@ -865,10 +865,22 @@ impl Engine {
                 EvalAltResult::ErrorFunctionNotFound(_, _) if def_val.is_some() => {
                     Ok(def_val.unwrap().into())
                 }
-                EvalAltResult::ErrorFunctionNotFound(_, _) => {
+                EvalAltResult::ErrorFunctionNotFound(_, pos) => {
                     Err(Box::new(EvalAltResult::ErrorFunctionNotFound(
-                        format!("{}{}", modules, name),
+                        format!(
-                        Position::none(),
+                            "{}{} ({})",
+                            modules,
+                            name,
+                            args.iter()
+                                .map(|a| if a.is::<ImmutableString>() {
+                                    "&str | ImmutableString | String"
+                                } else {
+                                    self.map_type_name((*a).type_name())
+                                })
+                                .collect::<Vec<_>>()
+                                .join(", ")
+                        ),
+                        pos,
                     )))
                 }
                 _ => Err(err),

src/fn_native.rs

@@ -10,9 +10,12 @@ use crate::token::{is_valid_identifier, Position};
 use crate::utils::{ImmutableString, StaticVec};
 use crate::Scope;
 
-use crate::stdlib::{
+use crate::stdlib::{boxed::Box, convert::TryFrom, fmt, mem, string::String, vec::Vec};
-    boxed::Box, convert::TryFrom, fmt, mem, rc::Rc, string::String, sync::Arc, vec::Vec,
+
-};
+#[cfg(not(feature = "sync"))]
+use crate::stdlib::rc::Rc;
+#[cfg(feature = "sync")]
+use crate::stdlib::sync::Arc;
 
 /// Trait that maps to `Send + Sync` only under the `sync` feature.
 #[cfg(feature = "sync")]

src/packages/arithmetic.rs

@@ -20,9 +20,12 @@ use crate::stdlib::{
     boxed::Box,
     fmt::Display,
     format,
-    ops::{Add, BitAnd, BitOr, BitXor, Div, Mul, Neg, Rem, Shl, Shr, Sub},
+    ops::{Add, BitAnd, BitOr, BitXor, Div, Mul, Neg, Rem, Sub},
 };
 
+#[cfg(feature = "unchecked")]
+use crate::stdlib::ops::{Shl, Shr};
+
 // Checked add
 pub(crate) fn add<T: Display + CheckedAdd>(x: T, y: T) -> FuncReturn<T> {
     x.checked_add(&y).ok_or_else(|| {
@@ -171,10 +174,12 @@ pub(crate) fn shr<T: Display + CheckedShr>(x: T, y: INT) -> FuncReturn<T> {
     })
 }
 // Unchecked left-shift - may panic if shifting by a negative number of bits
+#[cfg(feature = "unchecked")]
 pub(crate) fn shl_u<T: Shl<T>>(x: T, y: T) -> FuncReturn<<T as Shl<T>>::Output> {
     Ok(x.shl(y))
 }
 // Unchecked right-shift - may panic if shifting by a negative number of bits
+#[cfg(feature = "unchecked")]
 pub(crate) fn shr_u<T: Shr<T>>(x: T, y: T) -> FuncReturn<<T as Shr<T>>::Output> {
     Ok(x.shr(y))
 }
@@ -229,6 +234,7 @@ pub(crate) fn pow_i_i(x: INT, y: INT) -> FuncReturn<INT> {
     }
 }
 // Unchecked integer power - may panic on overflow or if the power index is too high (> u32::MAX)
+#[cfg(feature = "unchecked")]
 pub(crate) fn pow_i_i_u(x: INT, y: INT) -> FuncReturn<INT> {
     Ok(x.pow(y as u32))
 }

src/packages/mod.rs

@@ -74,6 +74,7 @@ impl PackagesCollection {
             .flatten()
     }
     /// Does the specified TypeId iterator exist in the `PackagesCollection`?
+    #[allow(dead_code)]
     pub fn contains_iter(&self, id: TypeId) -> bool {
         self.0.iter().any(|p| p.contains_iter(id))
     }

src/packages/time_basic.rs

@@ -1,12 +1,17 @@
 #![cfg(not(feature = "no_std"))]
 use super::logic::{eq, gt, gte, lt, lte, ne};
+
+#[cfg(feature = "no_float")]
 use super::math_basic::MAX_INT;
 
 use crate::def_package;
-use crate::module::FuncReturn;
-use crate::parser::INT;
 use crate::result::EvalAltResult;
-use crate::token::Position;
+
+#[cfg(not(feature = "no_float"))]
+use crate::parser::FLOAT;
+
+#[cfg(feature = "no_float")]
+use crate::{module::FuncReturn, parser::INT, token::Position};
 
 #[cfg(not(target_arch = "wasm32"))]
 use crate::stdlib::time::Instant;
@@ -14,9 +19,6 @@ use crate::stdlib::time::Instant;
 #[cfg(target_arch = "wasm32")]
 use instant::Instant;
 
-#[cfg(not(feature = "no_float"))]
-use crate::parser::FLOAT;
-
 def_package!(crate:BasicTimePackage:"Basic timing utilities.", lib, {
     // Register date/time functions
     lib.set_fn_0("timestamp", || Ok(Instant::now()));

src/syntax.rs

@@ -14,11 +14,14 @@ use crate::utils::StaticVec;
 use crate::stdlib::{
     boxed::Box,
     fmt, format,
-    rc::Rc,
     string::{String, ToString},
-    sync::Arc,
 };
 
+#[cfg(not(feature = "sync"))]
+use crate::stdlib::rc::Rc;
+#[cfg(feature = "sync")]
+use crate::stdlib::sync::Arc;
+
 /// A general expression evaluation trait object.
 #[cfg(not(feature = "sync"))]
 pub type FnCustomSyntaxEval = dyn Fn(