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sha256=3ab66631f5d794ad05a2e6e4cfc4e06d3674a7802709b77c6709bbb8e3df1eb0
README.md.html
ppx_csv_conv
Generate functions to read/write records in csv format.
ppx_csv_conv
generates functions to output some records as a csv
file, and read the records back from a list of strings coming from a
csv file or a database query.
Usage
Annotate the type: [@@deriving fields, csv]
type t = {
field : ...
....
} [@@deriving fields, csv]
Csv uses fields so fields is also required. Now the functions listed
in Csvfields.Csv.Csvable
are included in the module, including
conversion to and from string lists, dumping to files, and loading
files.
The Csvfields.Csv
module provides the Atom
functor, which accepts a
Stringable module to produce the necessary functions for recursive
calls:
module Date = struct
include Date
include (Csvfields.Csv.Atom (Date) : Csvfields.Csv.Csvable with type t := t)
end
type t = {
a : float;
b : string;
c : int;
e : Date.t;
} [@@deriving fields, csv]
Generate code/functions with types:
include (Csvfields.Csv.Csvable with type t := t)
(Known) limitations:
No
option
,ref
, orlazy_t
types allowed.No variant types ... nothing other than primitive types and
records. You should create your own stringable version of those
types and use theAtom
functor.The name of the type must be
t
.