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Difference between revisions of "EDT:EGL Language Operators and Expressions"
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== Operators and expressions (Table 7) == | == Operators and expressions (Table 7) == | ||
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| bgcolor="#999999" align="center" | '''''Operators and expressions<sup>1</sup>''''' | | bgcolor="#999999" align="center" | '''''Operators and expressions<sup>1</sup>''''' | ||
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| bgcolor="#cccccc" | ''. (member access)'' | | bgcolor="#cccccc" | ''. (member access)'' | ||
| done<br> | | done<br> | ||
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| done<br> | | done<br> | ||
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| bgcolor="#cccccc" | ''='' | | bgcolor="#cccccc" | ''='' | ||
| done<br> | | done<br> | ||
| − | | <br> | + | | done<br> |
| done<br> | | done<br> | ||
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| bgcolor="#cccccc" | ''function invocation'' | | bgcolor="#cccccc" | ''function invocation'' | ||
| <br>done | | <br>done | ||
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| bgcolor="#cccccc" | ''new'' | | bgcolor="#cccccc" | ''new'' | ||
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| bgcolor="#cccccc" | ''[ ] (substring)<sup>2</sup>'' | | bgcolor="#cccccc" | ''[ ] (substring)<sup>2</sup>'' | ||
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| bgcolor="#cccccc" | ''assigning math (+= -= *= /= %= **=)<sup>9</sup>'' | | bgcolor="#cccccc" | ''assigning math (+= -= *= /= %= **=)<sup>9</sup>'' | ||
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| bgcolor="#cccccc" | ''logical (And Or && ||)'' | | bgcolor="#cccccc" | ''logical (And Or && ||)'' | ||
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| bgcolor="#cccccc" | ''if-then-else'' (condition ? val1 : val2)''<sup>6</sup>'' | | bgcolor="#cccccc" | ''if-then-else'' (condition ? val1 : val2)''<sup>6</sup>'' | ||
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#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. | #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. | ||
| − | #<span style="background: | + | #<span style="background: none repeat scroll 0% 0% rgb(255, 165, 0);">Substrings are immutable, so they can't be the target of an assignment or the argument to an inout parameter.</span> |
| − | #<span style="background: | + | #<span style="background: none repeat scroll 0% 0% rgb(255, 165, 0);">The type cannot be a nullable type. Nullability is not part of a type signature.</span> |
#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. | #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. | #Bitwise operators are only supported on values of type int. | ||
Revision as of 12:52, 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 |
done |
done |
| function invocation | done |
done |
done |
| new | done |
done |
done |
| { } (set-values block) | done |
|
done |
| @ | done |
done (no work for generators) |
done (no work for generators) |
| [ ] (array access) | done |
|
done |
| [ ] (dynamic access) | done |
|
1d |
| [ ] (substring)2 | 1d |
done |
done |
| isa3 | 1d |
|
1d |
| as3 | see isa |
|
1d |
| unary (+ - ! ~)4, 5 | done |
|
0.5d |
| math (+ - * / % **)9 | done |
|
done |
| assigning math (+= -= *= /= %= **=)9 | done |
0.5d |
done |
| :: | done |
|
0.5d |
| ?: | done |
|
0.5d |
| logical (And Or && ||) | done |
done |
done |
| comparison (< > <= >= == !=) | done |
|
2d |
| bitwise (& | Xor << >> >>>)4, 5 |
|
|
0.5d |
| assigning bitwise (&= |= Xor= <<= >>= >>>=)4, 5 |
|
|
0.5d |
| if-then-else (condition ? val1 : val2)6 | 3d |
0.5d |
0.5d |
| 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.