diff options
Diffstat (limited to 'src/oldLib.zig')
| -rw-r--r-- | src/oldLib.zig | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/src/oldLib.zig b/src/oldLib.zig deleted file mode 100644 index 013daa7..0000000 --- a/src/oldLib.zig +++ /dev/null @@ -1,227 +0,0 @@ -const std = @import("std"); -const Type = std.builtin.Type; - -fn typeVerify(T: type, expected: anytype) Type { - const expectedType = @TypeOf(expected); - const expectedTypeInfo = @typeInfo(expectedType); - if (expectedTypeInfo != .@"struct") - @compileError("Expected struct or tuple, found " ++ @typeName(expectedType)); - const realTypeInfo = @typeInfo(T); - for (expected) |e| { - if(realTypeInfo == e) return realTypeInfo; - } - for (expected) |e| - @compileError("Expected one of " ++ @tagName(e) ++ ", found " ++ @typeName(T)); - return realTypeInfo; -} - -/// ```zig -/// (fn (fn (b) c, fn (a) b) fn (a) c) -/// ``` -/// Function composition -/// Type signature: (a -> b) -> (b -> c) -> (a -> c) -/// `outerFunc` and `innerFunc` are functions of types `b -> c` and `a -> b` respectively -/// Haskell equivalent: `outerFunc . innerFunc` -pub fn compose( - comptime outerFunc: anytype, - comptime innerFunc: anytype -) blk:{ - _=typeVerify(@TypeOf(outerFunc), .{ .@"fn" }); - _=typeVerify(@TypeOf(innerFunc), .{ .@"fn" }); - const out = @typeInfo(@TypeOf(outerFunc)).@"fn".return_type.?; - const in = @typeInfo(@TypeOf(innerFunc)).@"fn".params[0].type.?; - break :blk fn(in) out; -} { - const out = @typeInfo(@TypeOf(outerFunc)).@"fn".return_type.?; - const in = @typeInfo(@TypeOf(innerFunc)).@"fn".params[0].type.?; - return struct { - fn func(input: in) out { - return outerFunc(innerFunc(input)); - } - }.func; -} - -/// ```zig -/// (fn (Allocator, fn (fn (a) b, []a) error{OutOfMemory}![]b) -/// ``` -/// Map a function onto a list of values, allocating space for the new slice -/// Type signature: `(a -> b) -> [a] -> [b]` -/// `func` is of type `a -> b`, where `items` is of type `[a]`. -/// `map` will return a slice of type `[b]` -/// Haskell equivalent: `map func items` -pub fn mapAlloc( - allocator: std.mem.Allocator, - func: anytype, - items: anytype, -) error{OutOfMemory}!blk:{ - const funcInfo = typeVerify(@TypeOf(func), .{ .@"fn" }); - const itemsInfo = typeVerify(@TypeOf(items), .{ .array, .pointer }); - switch (itemsInfo) { - .pointer => |p| if(p.size != .many and p.size != .slice) - @compileError("Expected pointer of size 'many' or 'slice', found " ++ @tagName(p)), - else =>{}, - } - - break :blk []funcInfo.@"fn".return_type.?; -} { - const funcInfo = typeVerify(@TypeOf(func), .{ .@"fn" }); - var result = try allocator.alloc(funcInfo.@"fn".return_type.?, items.len); - for(items, 0..) |item, i| - result[i] = func(item); - return result; -} - -/// ```zig -/// (fn (Allocator, fn (fn (a) b, []a, *[]b) void) -/// ``` -/// Map a function onto a list of values, using a buffer -/// Type signature: `(a -> b) -> [a] -> [b]` -/// `func` is of type `a -> b`, where `items` is of type `[a]` and `buffer` is a pointer to a value of type `[b]`. -/// Haskell equivalent: `map func items` -pub fn map( - func: anytype, - items: anytype, - buffer: anytype, -) void { - _=typeVerify(@TypeOf(func), .{ .@"fn" }); - const itemsInfo = typeVerify(@TypeOf(items), .{ .pointer, .array }); - const bufferInfo = typeVerify(@TypeOf(buffer), .{ .pointer }); - const bufferChildInfo = typeVerify(bufferInfo.pointer.child, .{ .pointer, .array }); - switch (itemsInfo) { - .pointer => |p| if(p.size != .many and p.size != .slice) - @compileError("Expected pointer of size 'many' or 'slice', found '" ++ @tagName(p.size) ++ "'"), - else =>{}, - } - switch (bufferChildInfo) { - .pointer => |p| if(p.size != .many and p.size != .slice) - @compileError("Expected pointer of size 'many' or 'slice', found '" ++ @tagName(p.size) ++ "'"), - else =>{}, - } - for (items, 0..) |item, i| - buffer.*[i] = func(item); -} - -pub fn curry(func: anytype) blk: { - const typeInfo = typeVerify(@TypeOf(func), .{ .@"fn" }).@"fn"; - if (typeInfo.params.len == 1) - break :blk @TypeOf(func); - if (typeInfo.params.len == 2) - break :blk fn(typeInfo.params[0].type.?) - fn(typeInfo.params[1].type.?) typeInfo.return_type.?; - if (typeInfo.params.len == 3) - break :blk fn(typeInfo.params[0].type.?) - fn(typeInfo.params[1].type.?) - fn(typeInfo.params[2].type.?) typeInfo.return_type.?; - -} { - const typeInfo = typeVerify(@TypeOf(func), .{ .@"fn" }).@"fn"; - if (typeInfo.params.len == 1) - return func; - if (typeInfo.params.len == 2) - return struct { - fn funct(arg1: typeInfo.params[0].type.?) fn(typeInfo.params[1].type.?) typeInfo.return_type.? { - return struct { - fn func2(arg2: typeInfo.params[1].type.?) typeInfo.return_type.? { - return func(arg1, arg2); - } - }.func2; - } - }.funct; - if (typeInfo.params.len == 3) - return struct { - fn func1(arg1: typeInfo.params[0].type.?) fn(typeInfo.params[1].type.?) fn(typeInfo.params[2].type.?) - typeInfo.return_type.? { - return struct { - fn func2(arg2: typeInfo.params[1].type.?) fn(typeInfo.params[2].type.?) typeInfo.return_type.? { - return struct { - fn func3(arg3: typeInfo.params[2].type.?) typeInfo.return_type.? { - return func(arg1, arg2, arg3); - } - }.func3; - } - }.func2; - } - }.func1; -} - -pub fn curryHelper(func: anytype, args: anytype) blk: { - const typeInfo = typeVerify(@TypeOf(func), .{ .@"fn" }).@"fn"; - _=typeVerify(@TypeOf(args), .{ .@"struct" }); - if (typeInfo.params.len == 1) - break :blk @TypeOf(func); - const newInfo = std.builtin.Type{ - .@"fn" = .{ - .calling_convention = typeInfo.calling_convention, - .is_generic = typeInfo.is_generic, - .params = typeInfo.params[1..], - .is_var_args = typeInfo.is_var_args, - .return_type = typeInfo.return_type, - } - }; - _=newInfo; - // break :blk fn(typeInfo.params[args.len].type.?) @Type(newInfo); - break :blk type; -} { - const typeInfo = typeVerify(@TypeOf(func), .{ .@"fn" }).@"fn"; - const argInfo = typeVerify(@TypeOf(args), .{ .@"struct" }).@"struct"; - if (args.len == typeInfo.params.len) return struct { - pub fn funcCurry() typeInfo.return_type.? { - return @call(.auto, func, args); - } - }; - const newInfo = std.builtin.Type{ - .@"fn" = .{ - .calling_convention = typeInfo.calling_convention, - .is_generic = typeInfo.is_generic, - .params = typeInfo.params[1..], - .is_var_args = typeInfo.is_var_args, - .return_type = typeInfo.return_type, - } - }; - _=newInfo; - // const newType = @Type(newInfo); - return struct { - pub fn funcCurry(arg: typeInfo.params[0].type.?) type { - var fields: [64]std.builtin.Type.StructField = .{std.builtin.Type.StructField{.name="10",.type=type,.is_comptime=false,.alignment=8,.default_value_ptr=null}} ** 64; - for (argInfo.fields, 0..) |f, i| { - fields[i] = f; - } - var buf2: [3:0]u8 = undefined; - fields[args.len] = .{ - .name = blk: { - break :blk try intToStringZ(args.len, &buf2); - }, - .type = typeInfo.params[argInfo.fields.len].type.?, - .is_comptime = false, - .alignment = @alignOf(typeInfo.params[0].type.?), - .default_value_ptr = null, - }; - const newStruct = std.builtin.Type{ - .@"struct" = .{ - .backing_integer = argInfo.backing_integer, - .decls = argInfo.decls, - .fields = fields[0..args.len+1], - .is_tuple = argInfo.is_tuple, - .layout = argInfo.layout, - } - }; - - // std.debug.print("{any}", .{fields[0..3]}); - const t = @Type(newStruct); - var newArgs: t = undefined; - for (@typeInfo(t).@"struct".fields, 0..) |f, i| { - if (i == args.len) { - @field(newArgs, f.name) = arg; - } else @field(newArgs, f.name) = args[i]; - - } - return curryHelper(func, newArgs); - } - }; -} - -fn intToStringZ(int: u32, buf: []u8) ![:0]u8 { - return try std.fmt.bufPrintZ(buf, "{}", .{int}); -} - -// TODO: Add |
