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The notation we use is of the form:
a: A, b: B, ... --> composite-expression: composite-attribute
a, b,
etc. are the operands. A,
B, etc. are the operand's
attribute types. composite-expression
is the expression involving the operands and composite-attribute
is the resulting attribute type of the composite expression.
For instance:
a: A, b: B --> (a << b): tuple<A, B>
which reads as: given, a
and b are generators, and
A is the type of the attribute
of a, and B is the type of the attribute of b, then the type of the attribute of
a <<
b will be tuple<A, B>.
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Important |
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In the attribute tables, we will use |
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Expression |
Attribute |
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a: A, b: B --> (a << b): tuple<A, B> a: A, b: Unused --> (a << b): A a: Unused, b: B --> (a << b): B a: Unused, b: Unused --> (a << b): Unused a: A, b: A --> (a << b): vector<A> a: vector<A>, b: A --> (a << b): vector<A> a: A, b: vector<A> --> (a << b): vector<A> a: vector<A>, b: vector<A> --> (a << b): vector<A>
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a: A, b: B --> (a | b): variant<A, B> a: A, b: Unused --> (a | b): A a: Unused, b: B --> (a | b): B a: Unused, b: Unused --> (a | b): Unused a: A, b: A --> (a | b): A
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a: A --> *a: vector<A> a: Unused --> *a: Unused
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a: A --> +a: vector<A> a: Unused --> +a: Unused
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a: A, b: B --> (a % b): vector<A> a: Unused, b: B --> (a % b): Unused
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a: A --> repeat(...,...)[a]: vector<A> a: Unused --> repeat(...,...)[a]: Unused
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a: A --> -a: optional<A> a: Unused --> -a: Unused
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