Use tokens to speed up function name lookup.

src/packages/blob_basic.rs

@@ -146,6 +146,21 @@ pub mod blob_functions {
     pub fn is_empty(blob: &mut Blob) -> bool {
         blob.len() == 0
     }
+    /// Return `true` if the BLOB contains a specified byte value.
+    ///
+    /// # Example
+    ///
+    /// ```rhai
+    /// let text = "hello, world!";
+    ///
+    /// print(text.contains('h'));      // prints true
+    ///
+    /// print(text.contains('x'));      // prints false
+    /// ```
+    #[rhai_fn(name = "contains")]
+    pub fn contains(blob: &mut Blob, value: INT) -> bool {
+        blob.contains(&((value & 0x0000_00ff) as u8))
+    }
     /// Get the byte value at the `index` position in the BLOB.
     ///
     /// * If `index` < 0, position counts from the end of the BLOB (`-1` is the last element).

src/packages/iter_basic.rs

@@ -668,6 +668,12 @@ mod range_functions {
     pub fn is_empty_exclusive(range: &mut ExclusiveRange) -> bool {
         range.is_empty()
     }
+    /// Return `true` if the range contains a specified value.
+    #[rhai_fn(name = "contains")]
+    pub fn contains_exclusive(range: &mut ExclusiveRange, value: INT) -> bool {
+        range.contains(&value)
+    }
+
     /// Return the start of the inclusive range.
     #[rhai_fn(get = "start", name = "start", pure)]
     pub fn start_inclusive(range: &mut InclusiveRange) -> INT {
@@ -695,4 +701,9 @@ mod range_functions {
     pub fn is_empty_inclusive(range: &mut InclusiveRange) -> bool {
         range.is_empty()
     }
+    /// Return `true` if the range contains a specified value.
+    #[rhai_fn(name = "contains")]
+    pub fn contains_inclusive(range: &mut InclusiveRange, value: INT) -> bool {
+        range.contains(&value)
+    }
 }

src/packages/map_basic.rs

@@ -30,6 +30,20 @@ mod map_functions {
     pub fn is_empty(map: &mut Map) -> bool {
         map.len() == 0
     }
+    /// Returns `true` if the object map contains a specified property.
+    ///
+    /// # Example
+    ///
+    /// ```rhai
+    /// let m = #{a: 1, b: 2, c: 3};
+    ///
+    /// print(m.contains("b"));     // prints true
+    ///
+    /// print(m.contains("x"));     // prints false
+    /// ```
+    pub fn contains(map: &mut Map, property: &str) -> bool {
+        map.contains_key(property)
+    }
     /// Get the value of the `property` in the object map and return a copy.
     ///
     /// If `property` does not exist in the object map, `()` is returned.

src/packages/string_more.rs

@@ -506,6 +506,37 @@ mod string_functions {
         *character = to_lower_char(*character);
     }
 
+    /// Return `true` if the string contains a specified string.
+    ///
+    /// # Example
+    ///
+    /// ```rhai
+    /// let text = "hello, world!";
+    ///
+    /// print(text.contains("hello"));  // prints true
+    ///
+    /// print(text.contains("hey"));    // prints false
+    /// ```
+    pub fn contains(string: &str, match_string: &str) -> bool {
+        string.contains(match_string)
+    }
+
+    /// Return `true` if the string contains a specified character.
+    ///
+    /// # Example
+    ///
+    /// ```rhai
+    /// let text = "hello, world!";
+    ///
+    /// print(text.contains('h'));      // prints true
+    ///
+    /// print(text.contains('x'));      // prints false
+    /// ```
+    #[rhai_fn(name = "contains")]
+    pub fn contains_char(string: &str, character: char) -> bool {
+        string.contains(character).into()
+    }
+
     /// Return `true` if the string starts with a specified string.
     ///
     /// # Example