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build: remove assertion in Exercise.key

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Use `orelse unreachable` instead, in order to simplify the code.

Fix doc-comments in the Exercise type.
This commit is contained in:
Manlio Perillo 2023-05-06 12:02:21 +02:00
parent be43e2d010
commit 397c6671c0
1 changed files with 8 additions and 8 deletions
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16
build.zig
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@ -15,8 +15,7 @@ const print = std.debug.print;
pub const Exercise = struct {
/// main_file must have the format key_name.zig.
/// The key will be used as a shorthand to build
/// just one example.
/// The key will be used as a shorthand to build just one example.
main_file: []const u8,
/// This is the desired output of the program.
@ -31,8 +30,8 @@ pub const Exercise = struct {
/// Set this to true to check stdout instead.
check_stdout: bool = false,
/// This exercise makes use of C functions
/// We need to keep track of this, so we compile with libc
/// This exercise makes use of C functions.
/// We need to keep track of this, so we compile with libc.
link_libc: bool = false,
/// This exercise is not supported by the current Zig compiler.
@ -47,13 +46,14 @@ pub const Exercise = struct {
/// "zero padding" removed.
/// For example, "001_hello.zig" has the key "1".
pub fn key(self: Exercise) []const u8 {
const end_index = std.mem.indexOfScalar(u8, self.main_file, '_');
assert(end_index != null); // main file must be key_description.zig
// Main file must be key_description.zig.
const end_index = std.mem.indexOfScalar(u8, self.main_file, '_') orelse
unreachable;
// remove zero padding by advancing index past '0's
// Remove zero padding by advancing index past '0's.
var start_index: usize = 0;
while (self.main_file[start_index] == '0') start_index += 1;
return self.main_file[start_index..end_index.?];
return self.main_file[start_index..end_index];
}
/// Returns the exercise key as an integer.