Struct FunctionIdentifier 

pub struct FunctionIdentifier { /* private fields */ }

A SQL function identifier with proper case handling.

Similar to TableIdentifier and ColumnIdentifier, this type separates:

• Canonical form: Lowercase for comparison and lookup
• Display form: Preserves user’s original case for error messages

Example

use vibesql_ast::FunctionIdentifier;

// User wrote SUBSTR in their query
let func = FunctionIdentifier::new("SUBSTR");
assert_eq!(func.canonical(), "substr");  // Lowercase for comparison
assert_eq!(func.display(), "SUBSTR");    // Original case for errors

Implementations

impl FunctionIdentifier

pub fn new(name: &str) -> Self

Create a new function identifier preserving original case.

The canonical form is lowercased for case-insensitive comparison, while the display form preserves the original case for error messages.

pub fn canonical(&self) -> &str

Get the canonical (lowercase) form for comparison.

pub fn display(&self) -> &str

Get the display form (original case) for error messages.

pub fn matches(&self, name: &str) -> bool

Check if this function matches the given name (case-insensitive).

pub fn as_str(&self) -> &str

Get the canonical form as str (alias for canonical()).

pub fn to_lowercase(&self) -> String

Return the canonical (lowercase) form as a new String. Provides compatibility with code expecting String methods.

pub fn to_uppercase(&self) -> String

Return the canonical form uppercased. Provides compatibility with code expecting String methods.

pub fn eq_ignore_ascii_case(&self, other: &str) -> bool

Case-insensitive comparison with a string slice. Provides compatibility with code expecting String methods.

Trait Implementations

impl Clone for FunctionIdentifier

fn clone(&self) -> FunctionIdentifier

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FunctionIdentifier

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

Formats the value using the given formatter.

impl Display for FunctionIdentifier

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

Formats the value using the given formatter.

impl From<&str> for FunctionIdentifier

fn from(s: &str) -> Self

Converts to this type from the input type.

impl From<String> for FunctionIdentifier

fn from(s: String) -> Self

Converts to this type from the input type.

impl Hash for FunctionIdentifier

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq<&str> for FunctionIdentifier

fn eq(&self, other: &&str) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<str> for FunctionIdentifier

fn eq(&self, other: &str) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq for FunctionIdentifier

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for FunctionIdentifier