Standard Library
Below is the API for the OCaml standard library. It's directly copied over from the OCaml Manual, formatted to the Reason syntax and styled accordingly. The API docs are work-in-progress; we'll be polishing these gradually!
If you're targeting JavaScript, the API docs for BuckleScript includes all of below, plus JS-specific APIs.
Module Ast_helper.Exp
module Exp: sig .. end
Expressions
val mk : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression_desc -> Parsetree.expression
val attr : Parsetree.expression -> Parsetree.attribute -> Parsetree.expression
val ident : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Ast_helper.lid -> Parsetree.expression
val constant : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Asttypes.constant -> Parsetree.expression
val let_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Asttypes.rec_flag -> Parsetree.value_binding list -> Parsetree.expression -> Parsetree.expression
val fun_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Asttypes.label -> Parsetree.expression option -> Parsetree.pattern -> Parsetree.expression -> Parsetree.expression
val function_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.case list -> Parsetree.expression
val apply : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> (Asttypes.label * Parsetree.expression) list -> Parsetree.expression
val match_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> Parsetree.case list -> Parsetree.expression
val try_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> Parsetree.case list -> Parsetree.expression
val tuple : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression list -> Parsetree.expression
val construct : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Ast_helper.lid -> Parsetree.expression option -> Parsetree.expression
val variant : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Asttypes.label -> Parsetree.expression option -> Parsetree.expression
val record : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> (Ast_helper.lid * Parsetree.expression) list -> Parsetree.expression option -> Parsetree.expression
val field : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> Ast_helper.lid -> Parsetree.expression
val setfield : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> Ast_helper.lid -> Parsetree.expression -> Parsetree.expression
val array : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression list -> Parsetree.expression
val ifthenelse : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> Parsetree.expression -> Parsetree.expression option -> Parsetree.expression
val sequence : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> Parsetree.expression -> Parsetree.expression
val while_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> Parsetree.expression -> Parsetree.expression
val for_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.pattern -> Parsetree.expression -> Parsetree.expression -> Asttypes.direction_flag -> Parsetree.expression -> Parsetree.expression
val coerce : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> Parsetree.core_type option -> Parsetree.core_type -> Parsetree.expression
val constraint_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> Parsetree.core_type -> Parsetree.expression
val send : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> string -> Parsetree.expression
val new_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Ast_helper.lid -> Parsetree.expression
val setinstvar : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Ast_helper.str -> Parsetree.expression -> Parsetree.expression
val override : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> (Ast_helper.str * Parsetree.expression) list -> Parsetree.expression
val letmodule : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Ast_helper.str -> Parsetree.module_expr -> Parsetree.expression -> Parsetree.expression
val assert_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> Parsetree.expression
val lazy_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> Parsetree.expression
val poly : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.expression -> Parsetree.core_type option -> Parsetree.expression
val object_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.class_structure -> Parsetree.expression
val newtype : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> string -> Parsetree.expression -> Parsetree.expression
val pack : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.module_expr -> Parsetree.expression
val open_ : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Asttypes.override_flag -> Ast_helper.lid -> Parsetree.expression -> Parsetree.expression
val extension : ?loc:Ast_helper.loc -> ?attrs:Ast_helper.attrs -> Parsetree.extension -> Parsetree.expression
val case : Parsetree.pattern -> ?guard:Parsetree.expression -> Parsetree.expression -> Parsetree.case