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1
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module NamedTupleUtilities
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2
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3
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"""
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4
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select(a::NamedTuple, v::Val{n})
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5
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Select a field `n` from `a` if it is in `a`.
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6
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```jldoctest
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7
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julia> QueryOperators.NamedTupleUtilities.select((a=1,b=2,c=3),Val(:a))
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8
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(a = 1,)
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9
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```
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10
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"""
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11
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@generated function select(a::NamedTuple{an}, ::Val{bn}) where {an, bn}
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12
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47
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names = ((i for i in an if i == bn)...,)
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13
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47
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types = Tuple{(fieldtype(a, n) for n in names)...}
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14
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47
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vals = Expr[:(getfield(a, $(QuoteNode(n)))) for n in names]
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15
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47
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return :(NamedTuple{$names,$types}(($(vals...),)))
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16
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end
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17
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18
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"""
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19
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remove(a::NamedTuple, v::Val{n})
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20
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Remove a field `n` from the `a` if it is in `a`.
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21
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```jldoctest
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22
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julia> QueryOperators.NamedTupleUtilities.remove((a=1,b=2,c=3),Val(:c))
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23
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(a = 1, b = 2)
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24
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```
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25
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"""
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26
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@generated function remove(a::NamedTuple{an}, ::Val{bn}) where {an, bn}
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27
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47
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names = ((i for i in an if i != bn)...,)
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28
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47
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types = Tuple{(fieldtype(a, n) for n in names)...}
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29
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vals = Expr[:(getfield(a, $(QuoteNode(n)))) for n in names]
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30
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47
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return :(NamedTuple{$names,$types}(($(vals...),)))
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31
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end
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32
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33
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"""
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34
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range(a::NamedTuple, b::Val{n}, c::Val{n})
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35
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Return a NamedTuple which retains the fields from `b` to `c` in `a`.
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36
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If `b` is not in `a`, then it will return the empty NamedTuple.
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37
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If `c` is not in `a`, then it will return everything starting with `b`.
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38
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```jldoctest
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39
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julia> QueryOperators.NamedTupleUtilities.range((a=1,b=2,c=3),Val(:a),Val(:b))
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40
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(a = 1, b = 2)
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41
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```
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42
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"""
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43
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@generated function range(a::NamedTuple{an}, ::Val{bn}, ::Val{cn}) where {an, bn, cn}
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44
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rangeStarted = false
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45
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39
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names = Symbol[]
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46
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47
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for n in an
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47
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47
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if n == bn
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48
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rangeStarted = true
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49
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end
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50
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47
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if rangeStarted
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51
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47
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push!(names, n)
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52
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end
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53
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47
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if n == cn
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54
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rangeStarted = false
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55
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break
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56
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end
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57
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end
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58
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47
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types = Tuple{(fieldtype(a, n) for n in names)...}
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59
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47
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vals = Expr[:(getfield(a, $(QuoteNode(n)))) for n in names]
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60
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return :( NamedTuple{$(names...,),$types}(($(vals...),)) )
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61
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end
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62
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63
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"""
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64
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rename(a::NamedTuple, b::Val{n}, c::Val{n})
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65
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Return a NamedTuple derived from `a` in which the the field from `b` is renamed to `c`.
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66
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If `b` is not in `a`, then it will return the original NamedTuple.
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67
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If `c` is in `a`, then `ERROR: duplicate field name in NamedTuple: "c" is not unique` will occur.
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68
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```jldoctest
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69
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julia> QueryOperators.NamedTupleUtilities.rename((a = 1, b = 2, c = 3),Val(:a),Val(:d))
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70
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(d = 1, b = 2, c = 3)
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71
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julia> QueryOperators.NamedTupleUtilities.rename((a = 1, b = 2, c = 3),Val(:m),Val(:d))
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72
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(a = 1, b = 2, c = 3)
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73
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julia> QueryOperators.NamedTupleUtilities.rename((a = 1, b = 2, c = 3),Val(:a),Val(:c))
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74
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ERROR: duplicate field name in NamedTuple: "c" is not unique
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75
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```
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76
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"""
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77
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@generated function rename(a::NamedTuple{an}, ::Val{bn}, ::Val{cn}) where {an, bn, cn}
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78
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47
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names = Symbol[]
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79
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39
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typesArray = DataType[]
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80
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39
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vals = Expr[]
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81
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47
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for n in an
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82
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if n == bn
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83
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push!(names, cn)
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84
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else
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85
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47
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push!(names, n)
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86
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end
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87
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47
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push!(typesArray, fieldtype(a, n))
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88
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push!(vals, :(getfield(a, $(QuoteNode(n)))))
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89
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end
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90
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types = Tuple{typesArray...}
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91
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return :(NamedTuple{$(names...,),$types}(($(vals...),)))
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92
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end
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93
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94
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"""
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95
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startswith(a::NamedTuple, b::Val{n})
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96
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Return a NamedTuple which retains the fields with names starting with `b` in `a`.
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97
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```jldoctest
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98
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julia> QueryOperators.NamedTupleUtilities.startswith((abc=1,bcd=2,cde=3),Val(:a))
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99
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(abc = 1,)
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100
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```
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101
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"""
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102
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@generated function startswith(a::NamedTuple{an}, ::Val{bn}) where {an, bn}
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103
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names = ((i for i in an if Base.startswith(String(i), String(bn)))...,)
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104
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47
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types = Tuple{(fieldtype(a, n) for n in names)...}
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105
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47
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vals = Expr[:(getfield(a, $(QuoteNode(n)))) for n in names]
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106
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return :(NamedTuple{$names,$types}(($(vals...),)))
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107
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end
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108
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109
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"""
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110
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not_startswith(a::NamedTuple, b::Val{n})
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111
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Return a NamedTuple which retains the fields with names that do not start with `b` in `a`.
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112
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```jldoctest
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113
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julia> QueryOperators.NamedTupleUtilities.not_startswith((abc=1,bcd=2,cde=3),Val(:a))
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114
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(bcd = 2, cde = 3)
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115
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```
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116
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"""
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117
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@generated function not_startswith(a::NamedTuple{an}, ::Val{bn}) where {an, bn}
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118
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47
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names = ((i for i in an if !Base.startswith(String(i), String(bn)))...,)
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119
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47
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types = Tuple{(fieldtype(a, n) for n in names)...}
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120
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47
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vals = Expr[:(getfield(a, $(QuoteNode(n)))) for n in names]
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121
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47
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return :(NamedTuple{$names,$types}(($(vals...),)))
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122
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end
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123
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124
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"""
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125
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endswith(a::NamedTuple, b::Val{n})
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126
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Return a NamedTuple which retains the fields with names that do not end with `b` in `a`.
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127
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```jldoctest
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128
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julia> QueryOperators.NamedTupleUtilities.not_endswith((abc=1,bcd=2,cde=3),Val(:d))
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129
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(abc = 1, cde = 3)
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130
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```
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131
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"""
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132
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@generated function endswith(a::NamedTuple{an}, ::Val{bn}) where {an, bn}
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133
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47
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names = ((i for i in an if Base.endswith(String(i), String(bn)))...,)
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134
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47
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types = Tuple{(fieldtype(a, n) for n in names)...}
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135
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47
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vals = Expr[:(getfield(a, $(QuoteNode(n)))) for n in names]
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136
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47
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return :(NamedTuple{$names,$types}(($(vals...),)))
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137
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end
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138
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139
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"""
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140
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not_endswith(a::NamedTuple, b::Val{n})
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141
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Return a NamedTuple which retains the fields with names ending with `b` in `a`.
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142
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```jldoctest
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143
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julia> QueryOperators.NamedTupleUtilities.endswith((abc=1,bcd=2,cde=3),Val(:d))
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144
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(bcd = 2,)
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145
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```
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146
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"""
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147
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@generated function not_endswith(a::NamedTuple{an}, ::Val{bn}) where {an, bn}
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148
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47
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names = ((i for i in an if !Base.endswith(String(i), String(bn)))...,)
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149
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47
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types = Tuple{(fieldtype(a, n) for n in names)...}
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150
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47
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vals = Expr[:(getfield(a, $(QuoteNode(n)))) for n in names]
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151
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47
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return :(NamedTuple{$names,$types}(($(vals...),)))
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152
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end
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153
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154
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"""
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155
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occursin(a::NamedTuple, b::Val{n})
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156
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Return a NamedTuple which retains the fields with names containing `b` as a substring.
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157
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```jldoctest
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158
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julia> QueryOperators.NamedTupleUtilities.occursin((abc=1,bcd=2,cde=3),Val(:d))
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159
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(bcd = 2, cde = 3)
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160
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```
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161
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"""
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162
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@generated function occursin(a::NamedTuple{an}, ::Val{bn}) where {an, bn}
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163
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47
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names = ((i for i in an if Base.occursin(String(bn), String(i)))...,)
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164
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47
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types = Tuple{(fieldtype(a, n) for n in names)...}
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165
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47
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vals = Expr[:(getfield(a, $(QuoteNode(n)))) for n in names]
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166
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47
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return :(NamedTuple{$names,$types}(($(vals...),)))
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167
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end
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168
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169
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"""
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170
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not_occursin(a::NamedTuple, b::Val{n})
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171
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Return a NamedTuple which retains the fields without names containing `b` as a substring.
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172
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```jldoctest
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173
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julia> QueryOperators.NamedTupleUtilities.not_occursin((abc=1,bcd=2,cde=3),Val(:d))
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174
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(abc = 1,)
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175
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```
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176
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"""
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177
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@generated function not_occursin(a::NamedTuple{an}, ::Val{bn}) where {an, bn}
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178
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47
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names = ((i for i in an if !Base.occursin(String(bn), String(i)))...,)
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179
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47
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types = Tuple{(fieldtype(a, n) for n in names)...}
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180
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47
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vals = Expr[:(getfield(a, $(QuoteNode(n)))) for n in names]
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181
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47
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return :(NamedTuple{$names,$types}(($(vals...),)))
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182
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end
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183
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184
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"""
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185
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oftype(a::NamedTuple, b::DataType)
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186
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Returns a NamedTuple which retains the fields whose elements have type `b`.
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187
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```jldoctest
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188
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julia> QueryOperators.NamedTupleUtilities.oftype((a = [4,5,6], b = [3.,2.,1.], c = ["He","llo","World!"]), Val(Int64))
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189
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(a = [4, 5, 6],)
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190
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julia> QueryOperators.NamedTupleUtilities.oftype((a = [4,5,6], b = [3.,2.,1.], c = ["He","llo","World!"]), Val(Number))
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191
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(a = [4, 5, 6], b = [3., 2., 1.])
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192
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julia> QueryOperators.NamedTupleUtilities.oftype((a = [4,5,6], b = [3.,2.,1.], c = ["He","llo","World!"]), Val(Float32))
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193
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NamedTuple()
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194
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```
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195
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"""
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196
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@generated function oftype(a::NamedTuple{an}, ::Val{b}) where {an, b}
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197
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47
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names = ((i for i in an if fieldtype(a, i) <: b)...,)
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198
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47
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types = Tuple{(fieldtype(a, n) for n in names)...}
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199
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47
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vals = Expr[:(getfield(a, $(QuoteNode(n)))) for n in names]
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200
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47
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return :(NamedTuple{$names,$types}(($(vals...),)))
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201
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end
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202
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203
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end
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davidanthoff