NamedExpr¶
An assignment that is also an expression.
声明¶
语法¶
NamedExpr(expr target, expr value, ttype type)
参数¶
Argument |
描述 |
|---|---|
|
the variable assigned to. |
|
the value assigned, which is also the value of the expression. |
|
the type of the expression. |
返回值¶
The value of the expression.
描述¶
This is Python’s x := v. It has no Fortran spelling. The value is stored in
target and is also the result of the expression, so it can be used where a
value is expected.
示例¶
(NamedExpr
:target (Var
:v (SymbolRef 1 "i")
)
:value (IntegerConstant
:n 5
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
:type (Integer
:kind 4
)
)
It comes from this complete ASR text document:
(TranslationUnit
:symtab (SymbolTable
:id 0
:symbols {
"main" (Program
:symtab (SymbolTable
:id 1
:symbols {
"i" (Variable
:parent_symtab 1
:name "i"
:dependencies []
:intent :Local
:symbolic_value nil
:value nil
:storage :Default
:type (Integer
:kind 4
)
:type_declaration nil
:abi :Source
:access :Public
:presence :Required
:value_attr false
:target_attr false
:contiguous_attr false
:bindc_name nil
:is_volatile false
:is_protected false
:pass_attr :NotMethod
:self_argument nil
:codims []
)
"j" (Variable
:parent_symtab 1
:name "j"
:dependencies []
:intent :Local
:symbolic_value nil
:value nil
:storage :Default
:type (Integer
:kind 4
)
:type_declaration nil
:abi :Source
:access :Public
:presence :Required
:value_attr false
:target_attr false
:contiguous_attr false
:bindc_name nil
:is_volatile false
:is_protected false
:pass_attr :NotMethod
:self_argument nil
:codims []
)
}
)
:name "main"
:dependencies []
:body [
(Assignment
:target (Var
:v (SymbolRef 1 "j")
)
:value (NamedExpr
:target (Var
:v (SymbolRef 1 "i")
)
:value (IntegerConstant
:n 5
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
:type (Integer
:kind 4
)
)
:overloaded nil
:realloc_lhs false
:move_allocation false
)
]
)
}
)
:items []
)