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Add no_inidex feature to disable arrays and indexing.

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Stephen Chung
2020-03-10 17:10:33 +08:00
parent f3bcb2a10d
commit 52b5732bcb
10 changed files with 225 additions and 145 deletions
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13
README.md
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@@ -43,6 +43,7 @@ Optional features
| `debug_msgs` | Print debug messages to stdout (using `println!`) related to function registrations and function calls. |
| `no_stdlib` | Exclude the standard library of utility functions in the build, and only include the minimum necessary functionalities. |
| `unchecked` | Exclude arithmetic checking in the standard library. Beware that a bad script may panic the entire system! |
| `no_index` | Disable arrays and indexing features |
Related
-------
@@ -606,7 +607,7 @@ let booly = !true;
Numeric functions
-----------------
The following standard functions (defined in the standard library but excluded if `no_stdlib`) operate on `i8`, `i16`, `i32`, `i64`, `f32` and `f64` only:
The following standard functions (defined in the standard library but excluded if [`no_stdlib`](#optional-features)) operate on `i8`, `i16`, `i32`, `i64`, `f32` and `f64` only:
| Function | Description |
| ---------- | ----------------------------------- |
@@ -617,7 +618,7 @@ The following standard functions (defined in the standard library but excluded i
Floating-point functions
------------------------
The following standard functions (defined in the standard library but excluded if `no_stdlib`) operate on `f64` only:
The following standard functions (defined in the standard library but excluded if [`no_stdlib`](#optional-features)) operate on `f64` only:
| Category | Functions |
| ---------------- | ------------------------------------------------------------ |
@@ -645,7 +646,7 @@ let age = 42;
let record = full_name + ": age " + age;
record == "Bob C. Davis: age 42";
// Strings can be indexed to get a character
// Strings can be indexed to get a character (disabled with the 'no_index' feature)
let c = record[4];
c == 'C';
@@ -669,7 +670,7 @@ record[4] = '\x58'; // 0x58 = 'X'
record == "Bob X. Davis: age 42 ❤\n";
```
The following standard functions (defined in the standard library but excluded if `no_stdlib`) operate on strings:
The following standard functions (defined in the standard library but excluded if [`no_stdlib`](#optional-features)) operate on strings:
| Function | Description |
| ---------- | ------------------------------------------------------------------------ |
@@ -716,7 +717,7 @@ Arrays
You can create arrays of values, and then access them with numeric indices.
The following functions (defined in the standard library but excluded if `no_stdlib`) operate on arrays:
The following functions (defined in the standard library but excluded if [`no_stdlib`](#optional-features)) operate on arrays:
| Function | Description |
| ---------- | ------------------------------------------------------------------------------------- |
@@ -788,6 +789,8 @@ engine.register_fn("push",
The type of a Rhai array is `rhai::Array`. `type_of()` returns `"array"`.
Arrays are disabled via the [`no_index`](#optional-features) feature.
Comparison operators
--------------------