Function extraData [src]

Returns the requested data, as well as the new index which is at the start of the trailers for the object.

Prototype

pub fn extraData(code: Zir, comptime T: type, index: usize) ExtraData(T)

Parameters

code: ZirT: typeindex: usize

Source

  pub fn extraData(code: Zir, comptime T: type, index: usize) ExtraData(T) {
    const fields = @typeInfo(T).@"struct".fields;
    var i: usize = index;
    var result: T = undefined;
    inline for (fields) |field| {
        @field(result, field.name) = switch (field.type) {
            u32 => code.extra[i],

            Inst.Ref,
            Inst.Index,
            Inst.Declaration.Name,
            std.zig.SimpleComptimeReason,
            NullTerminatedString,
            // Ast.TokenIndex is missing because it is a u32.
            Ast.OptionalTokenIndex,
            Ast.Node.Index,
            Ast.Node.OptionalIndex,
            => @enumFromInt(code.extra[i]),

            Ast.TokenOffset,
            Ast.OptionalTokenOffset,
            Ast.Node.Offset,
            Ast.Node.OptionalOffset,
            => @enumFromInt(@as(i32, @bitCast(code.extra[i]))),

            Inst.Call.Flags,
            Inst.BuiltinCall.Flags,
            Inst.SwitchBlock.Bits,
            Inst.SwitchBlockErrUnion.Bits,
            Inst.FuncFancy.Bits,
            Inst.Declaration.Flags,
            Inst.Param.Type,
            Inst.Func.RetTy,
            => @bitCast(code.extra[i]),

            else => @compileError("bad field type"),
        };
        i += 1;
    }
    return .{
        .data = result,
        .end = i,
    };
}  