Add AbstractDIDResult with improved interface and multiple subtypes (#20)

Author: junyuan-chen

Project.toml

@@ -8,6 +8,7 @@ CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"
 CodecZlib = "944b1d66-785c-5afd-91f1-9de20f533193"
 Combinatorics = "861a8166-3701-5b0c-9a16-15d98fcdc6aa"
 DataAPI = "9a962f9c-6df0-11e9-0e5d-c546b8b5ee8a"
+LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 MacroTools = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09"
 Missings = "e1d29d7a-bbdc-5cf2-9ac0-f12de2c33e28"
 PooledArrays = "2dfb63ee-cc39-5dd5-95bd-886bf059d720"

src/DiffinDiffsBase.jl

@@ -1,9 +1,11 @@
 module DiffinDiffsBase
 
+using Base: @propagate_inbounds
 using CSV
 using CodecZlib: GzipDecompressorStream
 using Combinatorics: combinations
 using DataAPI: refarray, refpool
+using LinearAlgebra: Diagonal
 using MacroTools: @capture, isexpr, postwalk
 using Missings: disallowmissing
 using PooledArrays: _label
@@ -14,7 +16,7 @@ using StatsModels: Schema
 using Tables
 using Tables: AbstractColumns, table, istable, columnnames, getcolumn
 
-import Base: ==, show, union
+import Base: ==, show, parent, view
 import Base: eltype, firstindex, lastindex, getindex, iterate, length, sym_in
 import StatsBase: coef, vcov, responsename, coefnames, weights, nobs, dof_residual
 import StatsModels: concrete_term, schema, termvars
@@ -31,6 +33,10 @@ export cb,
        VecColumnTable,
        VecColsRow,
        subcolumns,
+       apply,
+       apply_and!,
+       apply_and,
+       TableIndexedMatrix,
 
        TreatmentSharpness,
        SharpDesign,
@@ -82,9 +88,21 @@ export cb,
        did,
        didspec,
        @did,
+       AbstractDIDResult,
        DIDResult,
+       AggregatedDIDResult,
        outcomename,
-       treatnames
+       treatnames,
+       treatcells,
+       ntreatcoef,
+       treatcoef,
+       treatvcov,
+       coefinds,
+       SubDIDResult,
+       TransformedDIDResult,
+       TransSubDIDResult,
+       lincom,
+       rescale
 
 include("utils.jl")
 include("tables.jl")