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The value or constructor is not defined
F# design patternWhy do Record types oblige you to define its members types?Best approach for designing F# libraries for use from both F# and C#When to use a Discriminate Union vs Record Type in F#F# Tree Puzzle - Value or constructor “TreeNode” is not foundIn F#, How can I attach metadata to discriminated union values?Why can't we satisfy F# static member constraints with type extensions?Get the memory size of a value of an F# typeGeneric method on recordF# return size of input defined as number of constructors
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
I have defined both records and created a union from them, but F# still complains that the constructor "Food" is not defined. What is the problem?
type Product = Name : string; BasePrice: int
type Size = Medium: int; Large: int
type Food = | Product of Product| Size of Size
let food = Food(Name = "Bagel"; BasePrice = 20; Medium = 10; Large = 20)
f#
asked Mar 26 at 12:27
DenkiDenki
11612 bronze badges
add a comment |
I have defined both records and created a union from them, but F# still complains that the constructor "Food" is not defined. What is the problem?
type Product = Name : string; BasePrice: int
type Size = Medium: int; Large: int
type Food = | Product of Product| Size of Size
let food = Food(Name = "Bagel"; BasePrice = 20; Medium = 10; Large = 20)
f#
asked Mar 26 at 12:27
DenkiDenki
11612 bronze badges
3
Foodis a type not a constructor, you need something likelet food = Product Name = "Bagel"; BasePrice = 20. Are you trying to build alist Food?
– Lee
Mar 26 at 12:42
@Lee I think you have the correct answer. Pls, add it as an answer to this question. This way Denki can mark it as the correct answer and this will add to your reputation.
– norbertB
Mar 26 at 13:16
add a comment |
I have defined both records and created a union from them, but F# still complains that the constructor "Food" is not defined. What is the problem?
type Product = Name : string; BasePrice: int
type Size = Medium: int; Large: int
type Food = | Product of Product| Size of Size
let food = Food(Name = "Bagel"; BasePrice = 20; Medium = 10; Large = 20)
f#
asked Mar 26 at 12:27
DenkiDenki
11612 bronze badges
I have defined both records and created a union from them, but F# still complains that the constructor "Food" is not defined. What is the problem?
type Product = Name : string; BasePrice: int
type Size = Medium: int; Large: int
type Food = | Product of Product| Size of Size
let food = Food(Name = "Bagel"; BasePrice = 20; Medium = 10; Large = 20)
f#
f#
asked Mar 26 at 12:27
DenkiDenki
11612 bronze badges
asked Mar 26 at 12:27
DenkiDenki
11612 bronze badges
asked Mar 26 at 12:27
DenkiDenki
11612 bronze badges
asked Mar 26 at 12:27
DenkiDenki
11612 bronze badges
asked Mar 26 at 12:27
DenkiDenki
11612 bronze badges
11612 bronze badges
3
Foodis a type not a constructor, you need something likelet food = Product Name = "Bagel"; BasePrice = 20. Are you trying to build alist Food?
– Lee
Mar 26 at 12:42
@Lee I think you have the correct answer. Pls, add it as an answer to this question. This way Denki can mark it as the correct answer and this will add to your reputation.
– norbertB
Mar 26 at 13:16
add a comment |
3
Foodis a type not a constructor, you need something likelet food = Product Name = "Bagel"; BasePrice = 20. Are you trying to build alist Food?
– Lee
Mar 26 at 12:42
@Lee I think you have the correct answer. Pls, add it as an answer to this question. This way Denki can mark it as the correct answer and this will add to your reputation.
– norbertB
Mar 26 at 13:16
3
3
Food is a type not a constructor, you need something like let food = Product Name = "Bagel"; BasePrice = 20. Are you trying to build a list Food?– Lee
Mar 26 at 12:42
Food is a type not a constructor, you need something like let food = Product Name = "Bagel"; BasePrice = 20. Are you trying to build a list Food?– Lee
Mar 26 at 12:42
@Lee I think you have the correct answer. Pls, add it as an answer to this question. This way Denki can mark it as the correct answer and this will add to your reputation.
– norbertB
Mar 26 at 13:16
@Lee I think you have the correct answer. Pls, add it as an answer to this question. This way Denki can mark it as the correct answer and this will add to your reputation.
– norbertB
Mar 26 at 13:16
add a comment |
1 Answer
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Food is a type, not a constructor - to create a value of type Food you need to use one of the constructors Product or Size. It looks like you're trying to construct a list Food, in which case you can use:
let food = [Product Name = "Bagel"; BasePrice = 20; Size Medium = 10; Large = 20]
answered Mar 26 at 13:23
LeeLee
123k15 gold badges181 silver badges251 bronze badges
add a comment |
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1 Answer
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1 Answer
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oldest
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Food is a type, not a constructor - to create a value of type Food you need to use one of the constructors Product or Size. It looks like you're trying to construct a list Food, in which case you can use:
let food = [Product Name = "Bagel"; BasePrice = 20; Size Medium = 10; Large = 20]
answered Mar 26 at 13:23
LeeLee
123k15 gold badges181 silver badges251 bronze badges
add a comment |
Food is a type, not a constructor - to create a value of type Food you need to use one of the constructors Product or Size. It looks like you're trying to construct a list Food, in which case you can use:
let food = [Product Name = "Bagel"; BasePrice = 20; Size Medium = 10; Large = 20]
answered Mar 26 at 13:23
LeeLee
123k15 gold badges181 silver badges251 bronze badges
add a comment |
Food is a type, not a constructor - to create a value of type Food you need to use one of the constructors Product or Size. It looks like you're trying to construct a list Food, in which case you can use:
let food = [Product Name = "Bagel"; BasePrice = 20; Size Medium = 10; Large = 20]
answered Mar 26 at 13:23
LeeLee
123k15 gold badges181 silver badges251 bronze badges
Food is a type, not a constructor - to create a value of type Food you need to use one of the constructors Product or Size. It looks like you're trying to construct a list Food, in which case you can use:
let food = [Product Name = "Bagel"; BasePrice = 20; Size Medium = 10; Large = 20]
answered Mar 26 at 13:23
LeeLee
123k15 gold badges181 silver badges251 bronze badges
answered Mar 26 at 13:23
LeeLee
123k15 gold badges181 silver badges251 bronze badges
answered Mar 26 at 13:23
LeeLee
123k15 gold badges181 silver badges251 bronze badges
answered Mar 26 at 13:23
LeeLee
123k15 gold badges181 silver badges251 bronze badges
123k15 gold badges181 silver badges251 bronze badges
add a comment |
add a comment |
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3
Foodis a type not a constructor, you need something likelet food = Product Name = "Bagel"; BasePrice = 20. Are you trying to build alist Food?– Lee
Mar 26 at 12:42
@Lee I think you have the correct answer. Pls, add it as an answer to this question. This way Denki can mark it as the correct answer and this will add to your reputation.
– norbertB
Mar 26 at 13:16