Diagnostics

pub const Diagnostics = struct {
    ast: Ast = .{
        .source = "",
        .tokens = .empty,
        .nodes = .empty,
        .extra_data = &.{},
        .mode = .zon,
        .errors = &.{},
    },
    zoir: Zoir = .{
        .nodes = .empty,
        .extra = &.{},
        .limbs = &.{},
        .string_bytes = &.{},
        .compile_errors = &.{},
        .error_notes = &.{},
    },
    type_check: ?Error.TypeCheckFailure = null,

    fn assertEmpty(self: Diagnostics) void {
        assert(self.ast.tokens.len == 0);
        assert(self.zoir.nodes.len == 0);
        assert(self.type_check == null);
    }

    pub fn deinit(self: *Diagnostics, gpa: Allocator) void {
        self.ast.deinit(gpa);
        self.zoir.deinit(gpa);
        if (self.type_check) |tc| tc.deinit(gpa);
        self.* = undefined;
    }

    pub fn iterateErrors(self: *const Diagnostics) Error.Iterator {
        return .{ .diag = self };
    }

    pub fn format(self: *const @This(), w: *std.Io.Writer) std.Io.Writer.Error!void {
        var errors = self.iterateErrors();
        while (errors.next()) |err| {
            const loc = err.getLocation(self);
            const msg = err.fmtMessage(self);
            try w.print("{d}:{d}: error: {f}\n", .{ loc.line + 1, loc.column + 1, msg });

            var notes = err.iterateNotes(self);
            while (notes.next()) |note| {
                const note_loc = note.getLocation(self);
                const note_msg = note.fmtMessage(self);
                try w.print("{d}:{d}: note: {f}\n", .{
                    note_loc.line + 1,
                    note_loc.column + 1,
                    note_msg,
                });
            }
        }
    }
}