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Richard SmithandJon Ross-Perkins
d2d5c5520b
A collection of additional Carbon examples demonstrating current language capabilities and some limitations of the current state of the toolchain. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
48 lines
1.3 KiB
Plaintext
48 lines
1.3 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/3
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library "day3_common";
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import library "io_utils";
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// Reads "mul(a,b)", and returns (true, a, b).
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// On error, stops before the first invalid character and returns (false, 0, 0).
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// TODO: -> Optional((i32, i32))
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fn ReadMul() -> (bool, i32, i32) {
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var a: i32;
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var b: i32;
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if (ConsumeChar(0x6D) and ConsumeChar(0x75) and ConsumeChar(0x6C) and
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ConsumeChar(0x28) and ReadInt(&a) and ConsumeChar(0x2C) and
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ReadInt(&b) and ConsumeChar(0x29)) {
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return (true, a, b);
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}
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return (false, 0, 0);
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}
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// Reads "do()" or "don't()", and returns (true, was_do).
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// On error, stops before the first invalid character and returns (false, false).
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fn ReadDoOrDont() -> (bool, bool) {
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// "do"
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if (not ConsumeChar(0x64) or not ConsumeChar(0x6F)) {
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return (false, false);
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}
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var do: bool = true;
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// "n't"
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if (ConsumeChar(0x6E)) {
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if (not ConsumeChar(0x27) or not ConsumeChar(0x74)) {
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return (false, false);
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}
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do = false;
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}
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// "()"
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if (not ConsumeChar(0x28) or not ConsumeChar(0x29)) {
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return (false, false);
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}
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return (true, do);
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}
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