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Chandler Carruthandjosh11b
7871237c15
Implements proposal #7016: `self` moves from the deduced implicit list (`fn F[self: Self]()`) to the front of the explicit list. Its type may be written explicitly (`fn F(self: Self)`) or omitted, in which case it defaults to `Self` (`fn F(self)`, `fn F(ref self)`); `self` in the implicit list is rejected. Throughout checking, `self` is modeled as the first explicit parameter. Because a method is just a function whose first parameter is `self`, it can also be called as an ordinary function with the receiver passed explicitly (`Type.M(obj, ...)`), not only as `obj.M(...)`. A new `SemIR::CallArgParamPatterns` helper chooses the parameters matched against the explicit arguments, excluding a leading `self` only when it is supplied as a method-call receiver; arity checking, conversion, and generic deduction use it. The resulting SemIR and lowering are unchanged: `self` is still `call_param0`, and witnesses, thunks, and vtables are unaffected. An omitted `self` type is parsed as a `SelfBindingPattern` node with no type expression; checking synthesizes the `Self` type so it behaves exactly like `self: Self`. However, the exact spelling used must match between a forward declaration and a definition, following #3763's rules around declaration matching. Generated functions, thunks, and C++ interop import/export build `self` as the first explicit parameter, and the `self`-type override (e.g. Derived->Base for a virtual override) applies to the explicit `self`. Placement is validated by new diagnostics: `SelfInImplicitParamList`, `SelfNotFirstParam`, and `SelfOutsideParamList`. The benchmark source generator and the documentation adopt the `(self)` shorthand; the prelude, the examples, and the test data are migrated in the following commits. Assisted-by: Claude Code with Claude Opus 4.7 --------- Co-authored-by: josh11b <15258583+josh11b@users.noreply.github.com>
61 lines
1.4 KiB
Plaintext
61 lines
1.4 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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// https://adventofcode.com/2024/day/4
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library "day4_common";
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import library "io_utils";
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class Wordsearch {
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impl as Core.UnformedInit {}
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fn Read() -> Wordsearch {
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returned var s: Wordsearch;
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// TODO: Use for loops once they're implemented.
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var y: i32 = 0;
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while (y < 140) {
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var x: i32 = 0;
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while (x < 140) {
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// TODO: Assert on failure.
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s.grid[x][y] = ReadChar() as i32;
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++x;
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}
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// TODO: Assert on failure.
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SkipNewline();
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++y;
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}
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return var;
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}
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fn At(self, x: i32, y: i32) -> i32 {
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return if x < 0 or x >= 140 or y < 0 or y >= 140 then -1 else self.grid[x][y];
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}
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// TODO: Make this generic in the length of the search query.
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fn Check4(self, xmas: array(i32, 4), x: i32, y: i32, dx: i32, dy: i32) -> bool {
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var i: i32 = 0;
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while (i < 4) {
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if (self.At(x + i * dx, y + i * dy) != xmas[i]) {
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return false;
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}
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++i;
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}
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return true;
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}
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fn Check3(self, mas: array(i32, 3), x: i32, y: i32, dx: i32, dy: i32) -> bool {
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var i: i32 = 0;
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while (i < 3) {
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if (self.At(x + i * dx, y + i * dy) != mas[i]) {
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return false;
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}
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++i;
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}
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return true;
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}
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var grid: array(array(i32, 140), 140);
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}
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