bat/tests/syntax-tests/highlighted/Zig/example.zig
2021-01-02 21:34:25 +01:00

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//! this is a top level doc, starts with "//!"
const std = @import("std");
pub fn main() anyerror!void {
 const stdout = std.io.getStdOut().writer();
 try stdout.print("Hello, {}!\n", .{"world"});
}
const expect = std.testing.expect;
test "comments" {
 // comments start with "//" until newline
 // foo bar baz
 const x = true; // another comment
 expect(x);
}
/// a doc comment starts with "///"
/// multiple lines are merged together
const Timestamp = struct {
 /// number of seconds since epoch
 seconds: i64,
 /// number of nanoseconds past the second
 nano: u32,
 const Self = @This();
 pub fn unixEpoch() Self {
 return Self{
 .seconds = 0,
 .nanos = 0,
 };
 }
};
const my_val = switch (std.Target.current.os.tag) {
 .linux => "Linux",
 else => "not Linux",
};
const Book = enum {
 paperback,
 hardcover,
 ebook,
 pdf,
};
const TokenType = union(enum) {
 int: isize,
 float: f64,
 string: []const u8,
};
const array_lit: [4]u8 = .{ 11, 22, 33, 44 };
const sentinal_lit = [_:0]u8{ 1, 2, 3, 4 };
test "address of syntax" {
 // Get the address of a variable:
 const x: i32 = 1234;
 const x_ptr = &x;
 // Dereference a pointer:
 expect(x_ptr.* == 1234);
 // When you get the address of a const variable, you get a const pointer to a single item.
 expect(@TypeOf(x_ptr) == *const i32);
 // If you want to mutate the value, you'd need an address of a mutable variable:
 var y: i32 = 5678;
 const y_ptr = &y;
 expect(@TypeOf(y_ptr) == *i32);
 y_ptr.* += 1;
 expect(y_ptr.* == 5679);
}
// integer literals
const decimal_int = 98222;
const hex_int = 0xff;
const another_hex_int = 0xFF;
const octal_int = 0o755;
const binary_int = 0b11110000;
// underscores may be placed between two digits as a visual separator
const one_billion = 1_000_000_000;
const binary_mask = 0b1_1111_1111;
const permissions = 0o7_5_5;
const big_address = 0xFF80_0000_0000_0000;
// float literals
const floating_point = 123.0E+77;
const another_float = 123.0;
const yet_another = 123.0e+77;
const hex_floating_point = 0x103.70p-5;
const another_hex_float = 0x103.70;
const yet_another_hex_float = 0x103.70P-5;
// underscores may be placed between two digits as a visual separator
const lightspeed = 299_792_458.000_000;
const nanosecond = 0.000_000_001;
const more_hex = 0x1234_5678.9ABC_CDEFp-10;
fn max(comptime T: type, a: T, b: T) T {
 return if (a > b) a else b;
}