Tuple¶
A fixed length sequence whose elements may have different types.
Declaration¶
Syntax¶
Tuple(ttype* type)
Arguments¶
Argument |
Description |
|---|---|
|
the types of the elements, in order. Its length is the length of the tuple. |
Return values¶
None. A type is not evaluated.
Description¶
The length and the element types are part of the type, so TupleItem needs a constant index and TupleLen is always known at compile time. That is what separates a tuple from a List.
Examples¶
(Tuple
:type [
(Integer
:kind 4
)
(Real
:kind 4
)
]
)
It comes from this complete ASR text document:
(TranslationUnit
:symtab (SymbolTable
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"t" (Variable
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"u" (Variable
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:type (Tuple
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(Integer
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)
(Real
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)
(Integer
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)
(Real
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)
]
)
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)
}
)
:name "main"
:dependencies []
:body [
(Assignment
:target (Var
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)
:value (TupleConstant
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(IntegerConstant
:n 1
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
(RealConstant
:r 2.0
:type (Real
:kind 4
)
)
]
:type (Tuple
:type [
(Integer
:kind 4
)
(Real
:kind 4
)
]
)
)
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)
(Assignment
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)
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:v (SymbolRef 1 "t")
)
:type (Integer
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)
:value (IntegerConstant
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)
:intboz_type :Decimal
)
)
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)
(Assignment
:target (Var
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)
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)
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:type (Tuple
:type [
(Integer
:kind 4
)
(Real
:kind 4
)
(Integer
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)
(Real
:kind 4
)
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)
(Assignment
:target (Var
:v (SymbolRef 1 "p")
)
:value (TupleCompare
:left (Var
:v (SymbolRef 1 "t")
)
:op :Eq
:right (Var
:v (SymbolRef 1 "t")
)
:type (Logical
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)
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)
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)
(Assignment
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)
:value (TupleContains
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)
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)
:intboz_type :Decimal
)
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)
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)
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(Assignment
:target (Var
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)
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)
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)
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)
:type (Integer
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)
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)
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)
]
)
}
)
:items []
)