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What’s new in SIL 3.0?
ContactFlorin HaszlerTel: +40 21 233 10 80Email: [email protected]
www.kepler-rominfo.com
In short…
1. Defining Global Variables
2. Constants
3. Multi-dimensional arrays
4. User-defined structure types
5. Chaining index and field access
6. Additional operators
7. Error handling (try-catch blocks)
Defining Global Values
• Define variables before function definitions
number HOURS_PER_DAY = 8;
number DAYS_PER_WEEK = 5;
function hoursInWeek() {
return HOURS_PER_DAY * DAYS_PER_WEEK;
}
• Create libraries of application-wide values
include “application_constants.incl”;
function hoursInWeek() {
return HOURS_PER_DAY * DAYS_PER_WEEK;
}
Constants
• Declare variables as constants
• Prevents (accidental) modification
const number HOURS_PER_DAY = 8;
const number DAYS_PER_WEEK = 5;
function hoursInWeek() {
return HOURS_PER_DAY * DAYS_PER_WEEK;
}
…
DAYS_PER_WEEK = 4; // error
Constants (2)
• Declare function parameters as constants
function arrayContains(const string [] array,
string element) {
array[0] = element; // no cheating!
return arrayFind(array, element);
}
• Prevent parameters from being modified within function body
Arrays
• SIL 2 only handles one-dimensional arrays
• … so why not more?
string [] arr1 = { “1”, “2” };
string [][] arr2 = { {“1.1”, “1.2”}, {“2.1”, “2.2”} };
• As many dimensions as one can keep track of (32 – can handle more? Let us know)
• Move around entire rows (dimensions)arr2[0] = arr1;
arr2[1] = arr1;
// or
arr2 = { arr1, arr1 }; // bonus feature
Structures
• User-defined structure types
struct Person {
string firstName;
string lastName;
number age;
}
• Structured access to data
• Easy to understand SIL scripts
• Castable from string []
Person p = {“John”, “Doe”, “32”};
Casting Structures
• Two-way casting between structures and arrays
• Casting array -> structure
– Array element type must be castable to any type of field in the structure
• Casting structure -> array
– Every type of field in the structure must be castable to array element type
Indexing
• For arrays:– Indexed by number:
array[1] = value;
– Indexed by keyarray[“key”] = value;
• For structures– Indexed by field name
person[“firstName”] = “John”;
– Access by field nameperson.lastName = “Doe”;
• Chaining teams[“JIRA”].developers[3].firstName
Additional Operators
• Pre-increment: ++i
• Post-increment: i++
• Pre-decrement: --i
• Post-decrement: i—i = 0;
j = i++ + --i + ++i + i--; //2
• Ternary ifreturn condition ? ifTrueValue : ifFalseValue;
Exception Handling
• SIL variables can be thrown as errorsstring err = “Error message”;
throw err;
• try-catch blockstry {
// instructions
} catch <type> var {
// handle error
} catch {
// handle error
}
• If <type> is specified, will only catch SIL objects of the specified type
• If <type> is NOT specified, will catch any exceptions (SIL errors or Java exceptions)
Find out more
• Documentation
http://confluence.kepler-rominfo.com
• Feedback & suggestions
