Struct Amount 

pub struct Amount(/* private fields */);

Units amount: [sign] (NUMBER | PAREN_EXPR) ([WS] op [WS] [sign] (NUMBER | PAREN_EXPR))* [WS CURRENCY], or a bare CURRENCY. Phase 2.4 extension supports arithmetic.

Implementations

impl Amount

pub fn sign(&self) -> Option<Sign>

Sign token (MINUS or PLUS), if present as the FIRST non-whitespace child of AMOUNT. Returns None if no sign or if the leading non-whitespace token is something else (e.g., L_PAREN, NUMBER, CURRENCY).

pub fn number(&self) -> Option<Number>

First NUMBER child token (the leading operand). For an arithmetic expression like 10+5 USD, this is 10; for a bare CURRENCY amount this is None.

pub fn currency(&self) -> Option<CurrencyName>

The trailing currency at paren-depth 0.

For 100 USD, 100USD, (1+2) USD: returns the trailing USD. For bare currency-only AMOUNT(CURRENCY): returns the same token. For malformed (1 USD) (CURRENCY inside parens, no outer trailing currency): returns None. For unclosed (1 USD\n or stray-closer 1 USD) (unbalanced parens): returns None, refusing to surface a possibly paren-internal currency.

Single forward pass with paren-depth tracking; no allocation. emit_amount_operand keeps paren contents flat under AMOUNT (no PAREN_EXPR sub-node), so depth tracking is the only structural disambiguator.

pub fn is_arithmetic(&self) -> bool

Returns true iff the amount contains an arithmetic operator (+, - between operands, *, /) or a parenthesized sub-expression — useful for typed-AST consumers that need to defer to expression evaluation.

Trait Implementations

impl AstNode for Amount

fn can_cast(kind: SyntaxKind) -> bool

Returns true iff kind is the wrapper’s expected node kind. Used by cast and by enum dispatch.

fn cast(syntax: SyntaxNode) -> Option<Self>

Wrap syntax if its kind matches; otherwise None.

fn syntax(&self) -> &SyntaxNode

The underlying CST node. text() reproduces the original bytes; children() / children_with_tokens() walk the tree.

impl Clone for Amount

fn clone(&self) -> Amount

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Amount

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

Formats the value using the given formatter.

impl Eq for Amount

impl Hash for Amount

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 for Amount

fn eq(&self, other: &Amount) -> 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 StructuralPartialEq for Amount