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const std = @import("std");
const Io = std.Io;
const Allocator = std.mem.Allocator;
const ArenaAllocator = std.heap.ArenaAllocator;
const SplitIterator = std.mem.SplitIterator;
const DelimiterType = std.mem.DelimiterType;
const parser = @import("../root.zig");
const Parser = parser.Parser;
pub const UseTagError = error{ NoPartAttribute, NoPartExported };
pub const Use: parser.ParserTag = .{
.name = "use",
.parse_fn = &parse,
};
fn parse(
arena: *ArenaAllocator,
io: Io,
state: *Parser,
reader: *Io.Reader,
writer: *Io.Writer,
attrs: *SplitIterator(u8, DelimiterType.scalar),
) anyerror!void {
_ = io;
const raw_part_attr: []const u8 = while (attrs.next()) |attr| {
var it = std.mem.splitScalar(u8, attr, '=');
if (std.mem.eql(u8, it.first(), "part")) {
break it.next() orelse return UseTagError.NoPartAttribute;
}
} else return UseTagError.NoPartAttribute;
const part = try arena.allocator().dupe(u8, raw_part_attr);
const part_text = state.exported_parts.get(part) orelse return UseTagError.NoPartExported;
var part_reader = Io.Reader.fixed(part_text);
_ = try part_reader.streamRemaining(writer);
while (true) {
_ = try reader.discardDelimiterInclusive('<');
const inside = try reader.takeDelimiterInclusive('>');
if (std.mem.eql(u8, "/use>", inside)) return;
}
}
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