Source
pub fn formatIntValue(
value: anytype,
comptime fmt: []const u8,
options: FormatOptions,
writer: anytype,
) !void {
comptime var base = 10;
comptime var case: Case = .lower;
const int_value = if (@TypeOf(value) == comptime_int) blk: {
const Int = math.IntFittingRange(value, value);
break :blk @as(Int, value);
} else value;
if (fmt.len == 0 or comptime std.mem.eql(u8, fmt, "d")) {
base = 10;
case = .lower;
} else if (comptime std.mem.eql(u8, fmt, "c")) {
if (@typeInfo(@TypeOf(int_value)).int.bits <= 8) {
return formatAsciiChar(@as(u8, int_value), options, writer);
} else {
@compileError("cannot print integer that is larger than 8 bits as an ASCII character");
}
} else if (comptime std.mem.eql(u8, fmt, "u")) {
if (@typeInfo(@TypeOf(int_value)).int.bits <= 21) {
return formatUnicodeCodepoint(@as(u21, int_value), options, writer);
} else {
@compileError("cannot print integer that is larger than 21 bits as an UTF-8 sequence");
}
} else if (comptime std.mem.eql(u8, fmt, "b")) {
base = 2;
case = .lower;
} else if (comptime std.mem.eql(u8, fmt, "x")) {
base = 16;
case = .lower;
} else if (comptime std.mem.eql(u8, fmt, "X")) {
base = 16;
case = .upper;
} else if (comptime std.mem.eql(u8, fmt, "o")) {
base = 8;
case = .lower;
} else {
invalidFmtError(fmt, value);
}
return formatInt(int_value, base, case, options, writer);
}