Struct NowFn 

pub struct NowFn;

Returns the current date and time as a volatile datetime serial.

Remarks

• NOW is volatile and may produce a different value at each recalculation.
• The integer part is the current date serial; the fractional part is time of day.
• Serial output respects the active workbook date system (1900 or 1904).

Examples

title: "NOW includes today's date"
formula: "=INT(NOW())=TODAY()"
expected: true

title: "NOW is at or after TODAY"
formula: "=NOW()>=TODAY()"
expected: true

related:
  - TODAY
  - TIME
  - SECOND
faq:
  - q: "How do I isolate only the time portion from NOW?"
    a: "Use NOW()-INT(NOW()); the integer part is date serial and the fractional part is time-of-day."

Trait Implementations

impl Debug for NowFn

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Function for NowFn

[formualizer-docgen:schema:start] Name: NOW Type: NowFn Min args: 0 Max args: 0 Variadic: false Signature: NOW() Arg schema: [] Caps: VOLATILE [formualizer-docgen:schema:end]

fn caps(&self) -> FnCaps

Capability flags for this function

fn name(&self) -> &'static str

fn min_args(&self) -> usize

fn eval<'a, 'b, 'c>( &self, _args: &'c [ArgumentHandle<'a, 'b>], ctx: &dyn FunctionContext<'b>, ) -> Result<CalcValue<'b>, ExcelError>

The unified evaluation path.

fn namespace(&self) -> &'static str

fn variadic(&self) -> bool

fn volatile(&self) -> bool

fn arg_schema(&self) -> &'static [ArgSchema]

fn aliases(&self) -> &'static [&'static str]

Optional list of additional alias names (case-insensitive) that should resolve to this function. Default: empty slice. Implementors can override to expose legacy names. Returned slice must have ’static lifetime (typically a static array reference).

fn function_salt(&self) -> u64

fn eval_reference<'a, 'b, 'c>( &self, _args: &'c [ArgumentHandle<'a, 'b>], _ctx: &dyn FunctionContext<'b>, ) -> Option<Result<ReferenceType, ExcelError>>

Optional reference result path. Only called by the interpreter/engine when the callsite expects a reference (e.g., range combinators, by-ref argument positions, or spill sources).

fn dispatch<'a, 'b, 'c>( &self, args: &'c [ArgumentHandle<'a, 'b>], ctx: &dyn FunctionContext<'b>, ) -> Result<CalcValue<'b>, ExcelError>

Dispatch to the unified evaluation path with automatic argument validation.