Setup variants for all allocating modules

This harmonizes the allocating modules in a couple of ways.  All can
now be constructed by pointer, and all treat various miscellaneous
read failures as `unreachable`, which indeed they should be.

The README has been updated to inform users of this option.

7 files changed, 228 insertions, 146 deletions

diff --git a/src/CaseFolding.zig b/src/CaseFolding.zig
index 162e82f..2e53bfa 100644
--- a/src/CaseFolding.zig
+++ b/src/CaseFolding.zig
@@ -11,20 +11,21 @@ owns_normalize: bool,
 
 const CaseFolding = @This();
 
-pub fn init(allocator: Allocator) !CaseFolding {
+pub fn init(allocator: Allocator) Allocator.Error!CaseFolding {
     var case_fold: CaseFolding = undefined;
     try case_fold.setup(allocator);
     return case_fold;
 }
 
-pub fn initWithNormalize(allocator: Allocator, norm: Normalize) !CaseFolding {
+pub fn initWithNormalize(allocator: Allocator, norm: Normalize) Allocator.Error!CaseFolding {
     var casefold: CaseFolding = undefined;
     try casefold.setupWithNormalize(allocator, norm);
     return casefold;
 }
 
-pub fn setup(casefold: *CaseFolding, allocator: Allocator) !void {
+pub fn setup(casefold: *CaseFolding, allocator: Allocator) Allocator.Error!void {
     try casefold.setupImpl(allocator);
+    // Handle normalize memory separately during setup:
     casefold.owns_normalize = false;
     errdefer casefold.deinit(allocator);
     try casefold.normalize.setup(allocator);
@@ -37,7 +38,16 @@ pub fn setupWithNormalize(casefold: *CaseFolding, allocator: Allocator, norm: No
     casefold.owns_normalize = false;
 }
 
-fn setupImpl(casefold: *CaseFolding, allocator: Allocator) !void {
+fn setupImpl(casefold: *CaseFolding, allocator: Allocator) Allocator.Error!void {
+    casefold.setupImplInner(allocator) catch |err| {
+        switch (err) {
+            error.OutOfMemory => |e| return e,
+            else => unreachable,
+        }
+    };
+}
+
+inline fn setupImplInner(casefold: *CaseFolding, allocator: Allocator) !void {
     const decompressor = compress.flate.inflate.decompressor;
     const in_bytes = @embedFile("fold");
     var in_fbs = std.io.fixedBufferStream(in_bytes);
diff --git a/src/GeneralCategories.zig b/src/GeneralCategories.zig
index a69f7a2..b7c82c0 100644
--- a/src/GeneralCategories.zig
+++ b/src/GeneralCategories.zig
@@ -1,7 +1,8 @@
-const std = @import("std");
-const builtin = @import("builtin");
-const compress = std.compress;
-const mem = std.mem;
+//! General Categories
+
+s1: []u16 = undefined,
+s2: []u5 = undefined,
+s3: []u5 = undefined,
 
 /// General Category
 pub const Gc = enum {
@@ -37,13 +38,15 @@ pub const Gc = enum {
     Zs, // Separator, Space
 };
 
-s1: []u16 = undefined,
-s2: []u5 = undefined,
-s3: []u5 = undefined,
+const GeneralCategories = @This();
 
-const Self = @This();
+pub fn init(allocator: Allocator) Allocator.Error!GeneralCategories {
+    var gencat = GeneralCategories{};
+    try gencat.setup(allocator);
+    return gencat;
+}
 
-pub fn init(allocator: mem.Allocator) !Self {
+pub fn setup(self: *GeneralCategories, allocator: Allocator) Allocator.Error!void {
     const decompressor = compress.flate.inflate.decompressor;
     const in_bytes = @embedFile("gencat");
     var in_fbs = std.io.fixedBufferStream(in_bytes);
@@ -52,39 +55,35 @@ pub fn init(allocator: mem.Allocator) !Self {
 
     const endian = builtin.cpu.arch.endian();
 
-    var self = Self{};
-
-    const s1_len: u16 = try reader.readInt(u16, endian);
+    const s1_len: u16 = reader.readInt(u16, endian) catch unreachable;
     self.s1 = try allocator.alloc(u16, s1_len);
     errdefer allocator.free(self.s1);
     for (0..s1_len) |i| self.s1[i] = try reader.readInt(u16, endian);
 
-    const s2_len: u16 = try reader.readInt(u16, endian);
+    const s2_len: u16 = reader.readInt(u16, endian) catch unreachable;
     self.s2 = try allocator.alloc(u5, s2_len);
     errdefer allocator.free(self.s2);
-    for (0..s2_len) |i| self.s2[i] = @intCast(try reader.readInt(u8, endian));
+    for (0..s2_len) |i| self.s2[i] = @intCast(reader.readInt(u8, endian) catch unreachable);
 
-    const s3_len: u16 = try reader.readInt(u8, endian);
+    const s3_len: u16 = reader.readInt(u8, endian) catch unreachable;
     self.s3 = try allocator.alloc(u5, s3_len);
     errdefer allocator.free(self.s3);
-    for (0..s3_len) |i| self.s3[i] = @intCast(try reader.readInt(u8, endian));
-
-    return self;
+    for (0..s3_len) |i| self.s3[i] = @intCast(reader.readInt(u8, endian) catch unreachable);
 }
 
-pub fn deinit(self: *const Self, allocator: mem.Allocator) void {
+pub fn deinit(self: *const GeneralCategories, allocator: mem.Allocator) void {
     allocator.free(self.s1);
     allocator.free(self.s2);
     allocator.free(self.s3);
 }
 
 /// Lookup the General Category for `cp`.
-pub fn gc(self: Self, cp: u21) Gc {
+pub fn gc(self: GeneralCategories, cp: u21) Gc {
     return @enumFromInt(self.s3[self.s2[self.s1[cp >> 8] + (cp & 0xff)]]);
 }
 
 /// True if `cp` has an C general category.
-pub fn isControl(self: Self, cp: u21) bool {
+pub fn isControl(self: GeneralCategories, cp: u21) bool {
     return switch (self.gc(cp)) {
         .Cc,
         .Cf,
@@ -97,7 +96,7 @@ pub fn isControl(self: Self, cp: u21) bool {
 }
 
 /// True if `cp` has an L general category.
-pub fn isLetter(self: Self, cp: u21) bool {
+pub fn isLetter(self: GeneralCategories, cp: u21) bool {
     return switch (self.gc(cp)) {
         .Ll,
         .Lm,
@@ -110,7 +109,7 @@ pub fn isLetter(self: Self, cp: u21) bool {
 }
 
 /// True if `cp` has an M general category.
-pub fn isMark(self: Self, cp: u21) bool {
+pub fn isMark(self: GeneralCategories, cp: u21) bool {
     return switch (self.gc(cp)) {
         .Mc,
         .Me,
@@ -121,7 +120,7 @@ pub fn isMark(self: Self, cp: u21) bool {
 }
 
 /// True if `cp` has an N general category.
-pub fn isNumber(self: Self, cp: u21) bool {
+pub fn isNumber(self: GeneralCategories, cp: u21) bool {
     return switch (self.gc(cp)) {
         .Nd,
         .Nl,
@@ -132,7 +131,7 @@ pub fn isNumber(self: Self, cp: u21) bool {
 }
 
 /// True if `cp` has an P general category.
-pub fn isPunctuation(self: Self, cp: u21) bool {
+pub fn isPunctuation(self: GeneralCategories, cp: u21) bool {
     return switch (self.gc(cp)) {
         .Pc,
         .Pd,
@@ -147,7 +146,7 @@ pub fn isPunctuation(self: Self, cp: u21) bool {
 }
 
 /// True if `cp` has an S general category.
-pub fn isSymbol(self: Self, cp: u21) bool {
+pub fn isSymbol(self: GeneralCategories, cp: u21) bool {
     return switch (self.gc(cp)) {
         .Sc,
         .Sk,
@@ -159,7 +158,7 @@ pub fn isSymbol(self: Self, cp: u21) bool {
 }
 
 /// True if `cp` has an Z general category.
-pub fn isSeparator(self: Self, cp: u21) bool {
+pub fn isSeparator(self: GeneralCategories, cp: u21) bool {
     return switch (self.gc(cp)) {
         .Zl,
         .Zp,
@@ -168,3 +167,9 @@ pub fn isSeparator(self: Self, cp: u21) bool {
         else => false,
     };
 }
+
+const std = @import("std");
+const builtin = @import("builtin");
+const compress = std.compress;
+const mem = std.mem;
+const Allocator = mem.Allocator;
diff --git a/src/Graphemes.zig b/src/Graphemes.zig
index 79cd2c6..7bf328a 100644
--- a/src/Graphemes.zig
+++ b/src/Graphemes.zig
@@ -14,7 +14,13 @@ s3: []u8 = undefined,
 
 const Graphemes = @This();
 
-pub inline fn init(allocator: mem.Allocator) mem.Allocator.Error!Graphemes {
+pub fn init(allocator: Allocator) Allocator.Error!Graphemes {
+    var graphemes = Graphemes{};
+    try graphemes.setup(allocator);
+    return graphemes;
+}
+
+pub fn setup(graphemes: *Graphemes, allocator: Allocator) Allocator.Error!void {
     const decompressor = compress.flate.inflate.decompressor;
     const in_bytes = @embedFile("gbp");
     var in_fbs = std.io.fixedBufferStream(in_bytes);
@@ -23,27 +29,23 @@ pub inline fn init(allocator: mem.Allocator) mem.Allocator.Error!Graphemes {
 
     const endian = builtin.cpu.arch.endian();
 
-    var self = Graphemes{};
-
     const s1_len: u16 = reader.readInt(u16, endian) catch unreachable;
-    self.s1 = try allocator.alloc(u16, s1_len);
-    errdefer allocator.free(self.s1);
-    for (0..s1_len) |i| self.s1[i] = reader.readInt(u16, endian) catch unreachable;
+    graphemes.s1 = try allocator.alloc(u16, s1_len);
+    errdefer allocator.free(graphemes.s1);
+    for (0..s1_len) |i| graphemes.s1[i] = reader.readInt(u16, endian) catch unreachable;
 
     const s2_len: u16 = reader.readInt(u16, endian) catch unreachable;
-    self.s2 = try allocator.alloc(u16, s2_len);
-    errdefer allocator.free(self.s2);
-    for (0..s2_len) |i| self.s2[i] = reader.readInt(u16, endian) catch unreachable;
+    graphemes.s2 = try allocator.alloc(u16, s2_len);
+    errdefer allocator.free(graphemes.s2);
+    for (0..s2_len) |i| graphemes.s2[i] = reader.readInt(u16, endian) catch unreachable;
 
     const s3_len: u16 = reader.readInt(u16, endian) catch unreachable;
-    self.s3 = try allocator.alloc(u8, s3_len);
-    errdefer allocator.free(self.s3);
-    _ = reader.readAll(self.s3) catch unreachable;
-
-    return self;
+    graphemes.s3 = try allocator.alloc(u8, s3_len);
+    errdefer allocator.free(graphemes.s3);
+    _ = reader.readAll(graphemes.s3) catch unreachable;
 }
 
-pub fn deinit(graphemes: *const Graphemes, allocator: mem.Allocator) void {
+pub fn deinit(graphemes: *const Graphemes, allocator: Allocator) void {
     allocator.free(graphemes.s1);
     allocator.free(graphemes.s2);
     allocator.free(graphemes.s3);
diff --git a/src/LetterCasing.zig b/src/LetterCasing.zig
index 0a0acb1..a7260b8 100644
--- a/src/LetterCasing.zig
+++ b/src/LetterCasing.zig
@@ -1,25 +1,31 @@
-const std = @import("std");
-const builtin = @import("builtin");
-const compress = std.compress;
-const mem = std.mem;
-const testing = std.testing;
-const unicode = std.unicode;
-
 const CodePointIterator = @import("code_point").Iterator;
 
-case_map: [][2]u21,
+case_map: [][2]u21 = undefined,
 prop_s1: []u16 = undefined,
 prop_s2: []u8 = undefined,
 
-const Self = @This();
+const LetterCasing = @This();
+
+pub fn init(allocator: Allocator) Allocator.Error!LetterCasing {
+    var case = LetterCasing{};
+    try case.setup(allocator);
+    return case;
+}
 
-pub fn init(allocator: mem.Allocator) !Self {
+pub fn setup(case: *LetterCasing, allocator: Allocator) Allocator.Error!void {
+    case.setupInner(allocator) catch |err| {
+        switch (err) {
+            error.OutOfMemory => |e| return e,
+            else => unreachable,
+        }
+    };
+}
+
+inline fn setupInner(self: *LetterCasing, allocator: mem.Allocator) !void {
     const decompressor = compress.flate.inflate.decompressor;
     const endian = builtin.cpu.arch.endian();
 
-    var self = Self{
-        .case_map = try allocator.alloc([2]u21, 0x110000),
-    };
+    self.case_map = try allocator.alloc([2]u21, 0x110000);
     errdefer allocator.free(self.case_map);
 
     for (0..0x110000) |i| {
@@ -68,28 +74,26 @@ pub fn init(allocator: mem.Allocator) !Self {
     self.prop_s2 = try allocator.alloc(u8, stage_2_len);
     errdefer allocator.free(self.prop_s2);
     _ = try cp_reader.readAll(self.prop_s2);
-
-    return self;
 }
 
-pub fn deinit(self: *const Self, allocator: mem.Allocator) void {
+pub fn deinit(self: *const LetterCasing, allocator: mem.Allocator) void {
     allocator.free(self.case_map);
     allocator.free(self.prop_s1);
     allocator.free(self.prop_s2);
 }
 
 // Returns true if `cp` is either upper, lower, or title case.
-pub fn isCased(self: Self, cp: u21) bool {
+pub fn isCased(self: LetterCasing, cp: u21) bool {
     return self.prop_s2[self.prop_s1[cp >> 8] + (cp & 0xff)] & 4 == 4;
 }
 
 // Returns true if `cp` is uppercase.
-pub fn isUpper(self: Self, cp: u21) bool {
+pub fn isUpper(self: LetterCasing, cp: u21) bool {
     return self.prop_s2[self.prop_s1[cp >> 8] + (cp & 0xff)] & 2 == 2;
 }
 
 /// Returns true if `str` is all uppercase.
-pub fn isUpperStr(self: Self, str: []const u8) bool {
+pub fn isUpperStr(self: LetterCasing, str: []const u8) bool {
     var iter = CodePointIterator{ .bytes = str };
 
     return while (iter.next()) |cp| {
@@ -107,14 +111,14 @@ test "isUpperStr" {
 }
 
 /// Returns uppercase mapping for `cp`.
-pub fn toUpper(self: Self, cp: u21) u21 {
+pub fn toUpper(self: LetterCasing, cp: u21) u21 {
     return self.case_map[cp][0];
 }
 
 /// Returns a new string with all letters in uppercase.
 /// Caller must free returned bytes with `allocator`.
 pub fn toUpperStr(
-    self: Self,
+    self: LetterCasing,
     allocator: mem.Allocator,
     str: []const u8,
 ) ![]u8 {
@@ -142,12 +146,12 @@ test "toUpperStr" {
 }
 
 // Returns true if `cp` is lowercase.
-pub fn isLower(self: Self, cp: u21) bool {
+pub fn isLower(self: LetterCasing, cp: u21) bool {
     return self.prop_s2[self.prop_s1[cp >> 8] + (cp & 0xff)] & 1 == 1;
 }
 
 /// Returns true if `str` is all lowercase.
-pub fn isLowerStr(self: Self, str: []const u8) bool {
+pub fn isLowerStr(self: LetterCasing, str: []const u8) bool {
     var iter = CodePointIterator{ .bytes = str };
 
     return while (iter.next()) |cp| {
@@ -165,14 +169,14 @@ test "isLowerStr" {
 }
 
 /// Returns lowercase mapping for `cp`.
-pub fn toLower(self: Self, cp: u21) u21 {
+pub fn toLower(self: LetterCasing, cp: u21) u21 {
     return self.case_map[cp][1];
 }
 
 /// Returns a new string with all letters in lowercase.
 /// Caller must free returned bytes with `allocator`.
 pub fn toLowerStr(
-    self: Self,
+    self: LetterCasing,
     allocator: mem.Allocator,
     str: []const u8,
 ) ![]u8 {
@@ -198,3 +202,11 @@ test "toLowerStr" {
     defer testing.allocator.free(lowered);
     try testing.expectEqualStrings("hello, world 2112!", lowered);
 }
+
+const std = @import("std");
+const builtin = @import("builtin");
+const compress = std.compress;
+const mem = std.mem;
+const Allocator = std.mem.Allocator;
+const testing = std.testing;
+const unicode = std.unicode;
diff --git a/src/Normalize.zig b/src/Normalize.zig
index d8c867d..1500b4c 100644
--- a/src/Normalize.zig
+++ b/src/Normalize.zig
@@ -10,22 +10,47 @@ normp_data: NormPropsData = undefined,
 
 const Normalize = @This();
 
-pub fn init(allocator: Allocator) !Normalize {
+pub fn init(allocator: Allocator) Allocator.Error!Normalize {
     var norm: Normalize = undefined;
     try norm.setup(allocator);
     return norm;
 }
 
-pub fn setup(self: *Normalize, allocator: Allocator) !void {
-    self.canon_data = try CanonData.init(allocator);
+pub fn setup(self: *Normalize, allocator: Allocator) Allocator.Error!void {
+    self.canon_data = CanonData.init(allocator) catch |err| {
+        switch (err) {
+            error.OutOfMemory => |e| return e,
+            else => unreachable,
+        }
+    };
     errdefer self.canon_data.deinit(allocator);
-    self.ccc_data = try CccData.init(allocator);
+    self.ccc_data = CccData.init(allocator) catch |err| {
+        switch (err) {
+            error.OutOfMemory => |e| return e,
+            else => unreachable,
+        }
+    };
     errdefer self.ccc_data.deinit(allocator);
-    self.compat_data = try CompatData.init(allocator);
+    self.compat_data = CompatData.init(allocator) catch |err| {
+        switch (err) {
+            error.OutOfMemory => |e| return e,
+            else => unreachable,
+        }
+    };
     errdefer self.compat_data.deinit(allocator);
-    self.hangul_data = try HangulData.init(allocator);
+    self.hangul_data = HangulData.init(allocator) catch |err| {
+        switch (err) {
+            error.OutOfMemory => |e| return e,
+            else => unreachable,
+        }
+    };
     errdefer self.hangul_data.deinit(allocator);
-    self.normp_data = try NormPropsData.init(allocator);
+    self.normp_data = NormPropsData.init(allocator) catch |err| {
+        switch (err) {
+            error.OutOfMemory => |e| return e,
+            else => unreachable,
+        }
+    };
 }
 
 pub fn deinit(norm: *const Normalize, allocator: Allocator) void {
diff --git a/src/Properties.zig b/src/Properties.zig
index 46920be..f7e57ec 100644
--- a/src/Properties.zig
+++ b/src/Properties.zig
@@ -1,8 +1,4 @@
-const std = @import("std");
-const builtin = @import("builtin");
-const compress = std.compress;
-const mem = std.mem;
-const testing = std.testing;
+//! Properties module
 
 core_s1: []u16 = undefined,
 core_s2: []u8 = undefined,
@@ -11,9 +7,24 @@ props_s2: []u8 = undefined,
 num_s1: []u16 = undefined,
 num_s2: []u8 = undefined,
 
-const Self = @This();
+const Properties = @This();
+
+pub fn init(allocator: Allocator) Allocator.Error!Properties {
+    var props = Properties{};
+    try props.setup(allocator);
+    return props;
+}
+
+pub fn setup(props: *Properties, allocator: Allocator) Allocator.Error!void {
+    props.setupInner(allocator) catch |err| {
+        switch (err) {
+            error.OutOfMemory => |e| return e,
+            else => unreachable,
+        }
+    };
+}
 
-pub fn init(allocator: mem.Allocator) !Self {
+inline fn setupInner(props: *Properties, allocator: Allocator) !void {
     const decompressor = compress.flate.inflate.decompressor;
     const endian = builtin.cpu.arch.endian();
 
@@ -23,17 +34,15 @@ pub fn init(allocator: mem.Allocator) !Self {
     var core_decomp = decompressor(.raw, core_fbs.reader());
     var core_reader = core_decomp.reader();
 
-    var self = Self{};
-
     const core_stage_1_len: u16 = try core_reader.readInt(u16, endian);
-    self.core_s1 = try allocator.alloc(u16, core_stage_1_len);
-    errdefer allocator.free(self.core_s1);
-    for (0..core_stage_1_len) |i| self.core_s1[i] = try core_reader.readInt(u16, endian);
+    props.core_s1 = try allocator.alloc(u16, core_stage_1_len);
+    errdefer allocator.free(props.core_s1);
+    for (0..core_stage_1_len) |i| props.core_s1[i] = try core_reader.readInt(u16, endian);
 
     const core_stage_2_len: u16 = try core_reader.readInt(u16, endian);
-    self.core_s2 = try allocator.alloc(u8, core_stage_2_len);
-    errdefer allocator.free(self.core_s2);
-    _ = try core_reader.readAll(self.core_s2);
+    props.core_s2 = try allocator.alloc(u8, core_stage_2_len);
+    errdefer allocator.free(props.core_s2);
+    _ = try core_reader.readAll(props.core_s2);
 
     // Process PropList.txt
     const props_bytes = @embedFile("props");
@@ -42,14 +51,14 @@ pub fn init(allocator: mem.Allocator) !Self {
     var props_reader = props_decomp.reader();
 
     const stage_1_len: u16 = try props_reader.readInt(u16, endian);
-    self.props_s1 = try allocator.alloc(u16, stage_1_len);
-    errdefer allocator.free(self.props_s1);
-    for (0..stage_1_len) |i| self.props_s1[i] = try props_reader.readInt(u16, endian);
+    props.props_s1 = try allocator.alloc(u16, stage_1_len);
+    errdefer allocator.free(props.props_s1);
+    for (0..stage_1_len) |i| props.props_s1[i] = try props_reader.readInt(u16, endian);
 
     const stage_2_len: u16 = try props_reader.readInt(u16, endian);
-    self.props_s2 = try allocator.alloc(u8, stage_2_len);
-    errdefer allocator.free(self.props_s2);
-    _ = try props_reader.readAll(self.props_s2);
+    props.props_s2 = try allocator.alloc(u8, stage_2_len);
+    errdefer allocator.free(props.props_s2);
+    _ = try props_reader.readAll(props.props_s2);
 
     // Process DerivedNumericType.txt
     const num_bytes = @embedFile("numeric");
@@ -58,19 +67,17 @@ pub fn init(allocator: mem.Allocator) !Self {
     var num_reader = num_decomp.reader();
 
     const num_stage_1_len: u16 = try num_reader.readInt(u16, endian);
-    self.num_s1 = try allocator.alloc(u16, num_stage_1_len);
-    errdefer allocator.free(self.num_s1);
-    for (0..num_stage_1_len) |i| self.num_s1[i] = try num_reader.readInt(u16, endian);
+    props.num_s1 = try allocator.alloc(u16, num_stage_1_len);
+    errdefer allocator.free(props.num_s1);
+    for (0..num_stage_1_len) |i| props.num_s1[i] = try num_reader.readInt(u16, endian);
 
     const num_stage_2_len: u16 = try num_reader.readInt(u16, endian);
-    self.num_s2 = try allocator.alloc(u8, num_stage_2_len);
-    errdefer allocator.free(self.num_s2);
-    _ = try num_reader.readAll(self.num_s2);
-
-    return self;
+    props.num_s2 = try allocator.alloc(u8, num_stage_2_len);
+    errdefer allocator.free(props.num_s2);
+    _ = try num_reader.readAll(props.num_s2);
 }
 
-pub fn deinit(self: *const Self, allocator: mem.Allocator) void {
+pub fn deinit(self: *const Properties, allocator: Allocator) void {
     allocator.free(self.core_s1);
     allocator.free(self.core_s2);
     allocator.free(self.props_s1);
@@ -80,62 +87,62 @@ pub fn deinit(self: *const Self, allocator: mem.Allocator) void {
 }
 
 /// True if `cp` is a mathematical symbol.
-pub fn isMath(self: Self, cp: u21) bool {
+pub fn isMath(self: Properties, cp: u21) bool {
     return self.core_s2[self.core_s1[cp >> 8] + (cp & 0xff)] & 1 == 1;
 }
 
 /// True if `cp` is an alphabetic character.
-pub fn isAlphabetic(self: Self, cp: u21) bool {
+pub fn isAlphabetic(self: Properties, cp: u21) bool {
     return self.core_s2[self.core_s1[cp >> 8] + (cp & 0xff)] & 2 == 2;
 }
 
 /// True if `cp` is a valid identifier start character.
-pub fn isIdStart(self: Self, cp: u21) bool {
+pub fn isIdStart(self: Properties, cp: u21) bool {
     return self.core_s2[self.core_s1[cp >> 8] + (cp & 0xff)] & 4 == 4;
 }
 
 /// True if `cp` is a valid identifier continuation character.
-pub fn isIdContinue(self: Self, cp: u21) bool {
+pub fn isIdContinue(self: Properties, cp: u21) bool {
     return self.core_s2[self.core_s1[cp >> 8] + (cp & 0xff)] & 8 == 8;
 }
 
 /// True if `cp` is a valid extended identifier start character.
-pub fn isXidStart(self: Self, cp: u21) bool {
+pub fn isXidStart(self: Properties, cp: u21) bool {
     return self.core_s2[self.core_s1[cp >> 8] + (cp & 0xff)] & 16 == 16;
 }
 
 /// True if `cp` is a valid extended identifier continuation character.
-pub fn isXidContinue(self: Self, cp: u21) bool {
+pub fn isXidContinue(self: Properties, cp: u21) bool {
     return self.core_s2[self.core_s1[cp >> 8] + (cp & 0xff)] & 32 == 32;
 }
 
 /// True if `cp` is a whitespace character.
-pub fn isWhitespace(self: Self, cp: u21) bool {
+pub fn isWhitespace(self: Properties, cp: u21) bool {
     return self.props_s2[self.props_s1[cp >> 8] + (cp & 0xff)] & 1 == 1;
 }
 
 /// True if `cp` is a hexadecimal digit.
-pub fn isHexDigit(self: Self, cp: u21) bool {
+pub fn isHexDigit(self: Properties, cp: u21) bool {
     return self.props_s2[self.props_s1[cp >> 8] + (cp & 0xff)] & 2 == 2;
 }
 
 /// True if `cp` is a diacritic mark.
-pub fn isDiacritic(self: Self, cp: u21) bool {
+pub fn isDiacritic(self: Properties, cp: u21) bool {
     return self.props_s2[self.props_s1[cp >> 8] + (cp & 0xff)] & 4 == 4;
 }
 
 /// True if `cp` is numeric.
-pub fn isNumeric(self: Self, cp: u21) bool {
+pub fn isNumeric(self: Properties, cp: u21) bool {
     return self.num_s2[self.num_s1[cp >> 8] + (cp & 0xff)] & 1 == 1;
 }
 
 /// True if `cp` is a digit.
-pub fn isDigit(self: Self, cp: u21) bool {
+pub fn isDigit(self: Properties, cp: u21) bool {
     return self.num_s2[self.num_s1[cp >> 8] + (cp & 0xff)] & 2 == 2;
 }
 
 /// True if `cp` is decimal.
-pub fn isDecimal(self: Self, cp: u21) bool {
+pub fn isDecimal(self: Properties, cp: u21) bool {
     return self.num_s2[self.num_s1[cp >> 8] + (cp & 0xff)] & 4 == 4;
 }
 
@@ -161,3 +168,10 @@ test "Props" {
     try testing.expect(!self.isDigit('2'));
     try testing.expect(!self.isDecimal('g'));
 }
+
+const std = @import("std");
+const builtin = @import("builtin");
+const compress = std.compress;
+const mem = std.mem;
+const Allocator = mem.Allocator;
+const testing = std.testing;
diff --git a/src/Scripts.zig b/src/Scripts.zig
index 4ad8549..f71a2b5 100644
--- a/src/Scripts.zig
+++ b/src/Scripts.zig
@@ -1,10 +1,10 @@
-const std = @import("std");
-const builtin = @import("builtin");
-const compress = std.compress;
-const mem = std.mem;
-const testing = std.testing;
+//! Scripts Module
+
+s1: []u16 = undefined,
+s2: []u8 = undefined,
+s3: []u8 = undefined,
 
-/// Scripts
+/// Scripts enum
 pub const Script = enum {
     none,
     Adlam,
@@ -172,13 +172,24 @@ pub const Script = enum {
     Zanabazar_Square,
 };
 
-s1: []u16 = undefined,
-s2: []u8 = undefined,
-s3: []u8 = undefined,
+const Scripts = @This();
 
-const Self = @This();
+pub fn init(allocator: Allocator) Allocator.Error!Scripts {
+    var scripts = Scripts{};
+    try scripts.setup(allocator);
+    return scripts;
+}
+
+pub fn setup(scripts: *Scripts, allocator: Allocator) Allocator.Error!void {
+    scripts.setupInner(allocator) catch |err| {
+        switch (err) {
+            error.OutOfMemory => |e| return e,
+            else => unreachable,
+        }
+    };
+}
 
-pub fn init(allocator: mem.Allocator) !Self {
+inline fn setupInner(scripts: *Scripts, allocator: mem.Allocator) !void {
     const decompressor = compress.flate.inflate.decompressor;
     const in_bytes = @embedFile("scripts");
     var in_fbs = std.io.fixedBufferStream(in_bytes);
@@ -187,34 +198,30 @@ pub fn init(allocator: mem.Allocator) !Self {
 
     const endian = builtin.cpu.arch.endian();
 
-    var self = Self{};
-
     const s1_len: u16 = try reader.readInt(u16, endian);
-    self.s1 = try allocator.alloc(u16, s1_len);
-    errdefer allocator.free(self.s1);
-    for (0..s1_len) |i| self.s1[i] = try reader.readInt(u16, endian);
+    scripts.s1 = try allocator.alloc(u16, s1_len);
+    errdefer allocator.free(scripts.s1);
+    for (0..s1_len) |i| scripts.s1[i] = try reader.readInt(u16, endian);
 
     const s2_len: u16 = try reader.readInt(u16, endian);
-    self.s2 = try allocator.alloc(u8, s2_len);
-    errdefer allocator.free(self.s2);
-    _ = try reader.readAll(self.s2);
+    scripts.s2 = try allocator.alloc(u8, s2_len);
+    errdefer allocator.free(scripts.s2);
+    _ = try reader.readAll(scripts.s2);
 
     const s3_len: u16 = try reader.readInt(u8, endian);
-    self.s3 = try allocator.alloc(u8, s3_len);
-    errdefer allocator.free(self.s3);
-    _ = try reader.readAll(self.s3);
-
-    return self;
+    scripts.s3 = try allocator.alloc(u8, s3_len);
+    errdefer allocator.free(scripts.s3);
+    _ = try reader.readAll(scripts.s3);
 }
 
-pub fn deinit(self: *const Self, allocator: mem.Allocator) void {
+pub fn deinit(self: *const Scripts, allocator: mem.Allocator) void {
     allocator.free(self.s1);
     allocator.free(self.s2);
     allocator.free(self.s3);
 }
 
 /// Lookup the Script type for `cp`.
-pub fn script(self: Self, cp: u21) ?Script {
+pub fn script(self: Scripts, cp: u21) ?Script {
     const byte = self.s3[self.s2[self.s1[cp >> 8] + (cp & 0xff)]];
     if (byte == 0) return null;
     return @enumFromInt(byte);
@@ -225,3 +232,10 @@ test "script" {
     defer self.deinit(std.testing.allocator);
     try testing.expectEqual(Script.Latin, self.script('A').?);
 }
+
+const std = @import("std");
+const builtin = @import("builtin");
+const compress = std.compress;
+const mem = std.mem;
+const Allocator = mem.Allocator;
+const testing = std.testing;