Das Modul Functions III

Die Grammatik in EBNF:

CondExpression = Expression

[ ``?'' CondExpression ``:'' CondExpression ] .

Expression = SimpleExpression

[ RelOp SimpleExpression ] .

SimpleExpression = [``+''|``-''] Term { AddOp Term } .

Term = Factor { MulOp Factor } .

Factor = Constant | IDENT | FunctionCall |

``~'' Factor | ``('' CondExpression ``)'' .

FunctionCall = IDENT ``('' CondExpression

[ ``,'' CondExpression ] ``)'' .

RelOp = ``='' | ``#'' | ``<'' | ``>'' | ``<='' | ``>='' .

AddOp = ``+'' | ``-'' | ``|'' .

MulOp = ``*'' | ``/'' | ``&'' .

Beispiele:

a+b x < 0? 0: sqrt(x) x < 0? -x: x x = 0? 0: sin(x)/cos(x)

CondExpression =	Expression
	[ ```?`'' CondExpression ```:`'' CondExpression ] .
Expression =	SimpleExpression
	[ RelOp SimpleExpression ] .
SimpleExpression =	[```+`''`\|````-`''] Term { AddOp Term } .
Term =	Factor { MulOp Factor } .
Factor =	Constant `\|` IDENT `\|` FunctionCall `\|`
	```~`'' Factor `\|` ```(`'' CondExpression ```)`'' .
FunctionCall =	IDENT ```(`'' CondExpression
	[ ```,`'' CondExpression ] ```)`'' .
RelOp =	```=`'' `\|` ```#`'' `\|` ```<`'' `\|` ```>`'' `\|` ```<=`'' `\|` ```>=`'' .
AddOp =	```+`'' `\|` ```-`'' `\|` ```\|`'' .
MulOp =	```*`'' `\|` ```/`'' `\|` ```&`'' .