Struct ColumnFn 

pub struct ColumnFn;

Trait Implementations

impl Debug for ColumnFn

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

Formats the value using the given formatter.

impl Function for ColumnFn

Returns the column number of a reference, or of the current cell when omitted.

COLUMN returns a 1-based column index (A = 1).

Remarks

• With a range argument, COLUMN returns the first column in that reference.
• Without arguments, it uses the column of the formula cell.
• Full-row references such as 5:5 return 1.
• Invalid references return an error (#REF!/#VALUE! depending on context).

Examples

title: "Column of a single-cell reference"
formula: '=COLUMN(C5)'
expected: 3

title: "Column of a range"
formula: '=COLUMN(B2:D4)'
expected: 2

related:
  - COLUMNS
  - ROW
  - ADDRESS
faq:
  - q: "What does COLUMN return for a range like B2:D4?"
    a: "COLUMN returns the first column index of the reference (2 for column B)."
  - q: "What if COLUMN() is used without a reference?"
    a: "It returns the formula cell's column number, or #VALUE! if current-cell context is unavailable."

[formualizer-docgen:schema:start] Name: COLUMN Type: ColumnFn Min args: 0 Max args: 1 Variadic: false Signature: COLUMN(arg1?: range@range) Arg schema: arg1{kinds=range,required=false,shape=range,by_ref=true,coercion=None,max=None,repeating=None,default=false} Caps: PURE [formualizer-docgen:schema:end]

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

fn min_args(&self) -> usize

fn caps(&self) -> FnCaps

Capability flags for this function

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

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 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.