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70 changes: 35 additions & 35 deletions crates/oxc_ast/src/ast_impl/literal.rs
Original file line number Diff line number Diff line change
Expand Up @@ -100,6 +100,41 @@ impl fmt::Display for NumericLiteral<'_> {
}
}

impl StringLiteral<'_> {
/// Static Semantics: `IsStringWellFormedUnicode`
/// test for \uD800-\uDFFF
///
/// See: <https://tc39.es/ecma262/multipage/abstract-operations.html#sec-isstringwellformedunicode>
pub fn is_string_well_formed_unicode(&self) -> bool {
let mut chars = self.value.chars();
while let Some(c) = chars.next() {
if c == '\\' && chars.next() == Some('u') {
let hex = &chars.as_str()[..4];
if let Ok(hex) = u32::from_str_radix(hex, 16) {
if (0xd800..=0xdfff).contains(&hex) {
return false;
}
};
}
}
true
}
}

impl AsRef<str> for StringLiteral<'_> {
#[inline]
fn as_ref(&self) -> &str {
self.value.as_ref()
}
}

impl fmt::Display for StringLiteral<'_> {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.value.fmt(f)
}
}

impl BigIntLiteral<'_> {
/// Is this BigInt literal zero? (`0n`).
pub fn is_zero(&self) -> bool {
Expand Down Expand Up @@ -262,38 +297,3 @@ impl fmt::Display for RegExpFlags {
Ok(())
}
}

impl StringLiteral<'_> {
/// Static Semantics: `IsStringWellFormedUnicode`
/// test for \uD800-\uDFFF
///
/// See: <https://tc39.es/ecma262/multipage/abstract-operations.html#sec-isstringwellformedunicode>
pub fn is_string_well_formed_unicode(&self) -> bool {
let mut chars = self.value.chars();
while let Some(c) = chars.next() {
if c == '\\' && chars.next() == Some('u') {
let hex = &chars.as_str()[..4];
if let Ok(hex) = u32::from_str_radix(hex, 16) {
if (0xd800..=0xdfff).contains(&hex) {
return false;
}
};
}
}
true
}
}

impl AsRef<str> for StringLiteral<'_> {
#[inline]
fn as_ref(&self) -> &str {
self.value.as_ref()
}
}

impl fmt::Display for StringLiteral<'_> {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.value.fmt(f)
}
}
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