| xtext arithmetics operation [message #899784] |
Thu, 02 August 2012 06:52  |
Eclipse User |
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Hi,
I'm working on a DSL I want to support addition soustraction division multiplication of variable or number for example
a+b*a
a+b/3
2+4
So, I've started with the following construct
OperateurArithmetiques:
Addition;
Addition returns OperateurArithmetiques:
Multiplication (({Plus.left=current} '+' | {Minus.left=current} '-') right=Multiplication)*;
Multiplication returns OperateurArithmetiques:
PrimaryExpression (({Multi.left=current} '*' | {Div.left=current} '/') right=PrimaryExpression)*;
PrimaryExpression returns OperateurArithmetiques:
'(' OperateurArithmetiques ')'
| {NumberLiteral}value=NUMBER
| name=[VariableDeclaration]
;
i realise test with xtend in parallel
and test doesn't work
my first test:
val compilationUnit =
'''
program MyProgramme
segment 0
(2+3)
eseg 0
end
'''.parse
val abalElement = compilationUnit.abalElements.head
val program = abalElement as Program
val segment= program.segment.get(0)
val expression= segment.body.get(0)
Assert::assertNotNull(expression)
Assert::assertTrue(expression instanceof OperateurArithmetiques)
val operateurArithmetiques=expression as OperateurArithmetiques
Assert::assertNotNull(operateurArithmetiques)
Assert::assertTrue(operateurArithmetiques instanceof Plus)
val plus=operateurArithmetiques as Plus
Assert::assertNotNull(plus)
Assert::assertEquals('2',plus.left)
plus.left is null i don't understand why
my second test :
val compilationUnit =
'''
program MyProgramme
segment 0
(a+b)
eseg 0
end
'''.parse
val abalElement = compilationUnit.abalElements.head
val program = abalElement as Program
val segment= program.segment.get(0)
val expression= segment.body.get(0)
Assert::assertNotNull(expression)
Assert::assertTrue(expression instanceof OperateurArithmetiques)
val operateurArithmetiques=expression as OperateurArithmetiques
Assert::assertNotNull(operateurArithmetiques)
Assert::assertTrue(operateurArithmetiques instanceof Plus)
val plus=operateurArithmetiques as Plus
Assert::assertNotNull(plus)
Assert::assertEquals('a',plus.left)
xtend error
junit.framework.AssertionFailedError: expected:<a> but was:<OperateurArithmetiquesImpl@2793d5d7>
Best regards,
Jérôme
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