struct Bits [src]

Fields

has_multi_cases: boolIf true, one or more prongs have multiple items.

has_else: boolIf true, there is an else prong. This is mutually exclusive with has_under.

has_under: boolIf true, there is an underscore prong. This is mutually exclusive with has_else.

any_has_tag_capture: boolIf true, at least one prong has an inline tag capture.

any_non_inline_capture: boolIf true, at least one prong has a capture which may not be comptime-known via inline.

has_continue: bool

scalar_cases_len: ScalarCasesLen

Members

ScalarCasesLen (Type)
specialProng (Function)

Source

  pub const Bits = packed struct(u32) {
    /// If true, one or more prongs have multiple items.
    has_multi_cases: bool,
    /// If true, there is an else prong. This is mutually exclusive with `has_under`.
    has_else: bool,
    /// If true, there is an underscore prong. This is mutually exclusive with `has_else`.
    has_under: bool,
    /// If true, at least one prong has an inline tag capture.
    any_has_tag_capture: bool,
    /// If true, at least one prong has a capture which may not
    /// be comptime-known via `inline`.
    any_non_inline_capture: bool,
    has_continue: bool,
    scalar_cases_len: ScalarCasesLen,

    pub const ScalarCasesLen = u26;

    pub fn specialProng(bits: Bits) SpecialProng {
        const has_else: u2 = @intFromBool(bits.has_else);
        const has_under: u2 = @intFromBool(bits.has_under);
        return switch ((has_else << 1) | has_under) {
            0b00 => .none,
            0b01 => .under,
            0b10 => .@"else",
            0b11 => unreachable,
        };
    }
}  