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Difference between revisions of "EDT:EGL Language Operators and Expressions"
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Revision as of 09:21, 21 July 2011
Please see the parent of this page, EDT:EGL Language.
Operators and expressions (Table 7)
| Operators and expressions1 | Core | JavaScript | Java |
| . (member access) | done |
|
done |
| = | done |
|
done |
| function invocation | done |
|
done |
| new | done |
|
done |
| { } (set-values block) | done |
|
done |
| @ | done |
|
|
| [ ] (array access) | done |
|
done |
| [ ] (dynamic access) | done |
|
|
| [ ] (substring)2 | 1d |
|
done |
| isa3 | 1d |
|
|
| as3 | see isa |
|
done |
| unary (+ - ! ~)4, 5 | done |
|
done |
| math (+ - * / % **)9 | done |
|
done |
| assigning math (+= -= *= /= %= **=)9 | done |
|
done |
| :: | done |
|
|
| ?: | done |
|
|
| logical (And Or && ||) | done |
|
done |
| comparison (< > <= >= == !=) | done |
|
done |
| bitwise (& | Xor << >> >>>)4, 5 |
|
|
|
| assigning bitwise (&= |= Xor= <<= >>= >>>=)4, 5 |
|
|
|
| if-then-else (condition ? val1 : val2)6 | 3d |
|
|
| in7 | 1d | N/S | N/S |
| like matches8 | 1d |
N/S | N/S |
Notes on Table 7
- We'll document error conditions of operators and expressions, and their resulting exceptions. Whenever possible this documentation will be comments in the EGL source file for a type.
- Substrings are immutable, so they can't be the target of an assignment or the argument to an inout parameter.
- The type cannot be a nullable type. Nullability is not part of a type signature.
- There are new bitwise operators in EDT. ~ is a bitwise NOT (also called the compliment), << is a left shift, >> is a right shift where the leftmost bits become zero, >>> is a right shift where the sign is copied into the leftmost bits.
- Bitwise operators are only supported on values of type int.
- The if-then-else operator is borrowed from languages like C and Java. The condition's type must be boolean. The two values must have the same type.
- We'll have functions in the array type to provide similar behavior.
- We'll have functions in the string type to provide similar behavior.
- Date/time math is not supported in EDT. Functions on the date and timestamp types provide similar behavior.