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|
//! FIXME: write short doc here
mod block;
use rustc_lexer::unescape;
use crate::{
ast, match_ast, AstNode, SyntaxError, SyntaxErrorKind,
SyntaxKind::{BYTE, BYTE_STRING, CHAR, INT_NUMBER, STRING},
SyntaxNode, SyntaxToken, TextUnit, T,
};
#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum EscapeError {
ZeroChars,
MoreThanOneChar,
LoneSlash,
InvalidEscape,
BareCarriageReturn,
EscapeOnlyChar,
TooShortHexEscape,
InvalidCharInHexEscape,
OutOfRangeHexEscape,
NoBraceInUnicodeEscape,
InvalidCharInUnicodeEscape,
EmptyUnicodeEscape,
UnclosedUnicodeEscape,
LeadingUnderscoreUnicodeEscape,
OverlongUnicodeEscape,
LoneSurrogateUnicodeEscape,
OutOfRangeUnicodeEscape,
UnicodeEscapeInByte,
NonAsciiCharInByte,
}
impl From<rustc_lexer::unescape::EscapeError> for EscapeError {
fn from(err: rustc_lexer::unescape::EscapeError) -> Self {
match err {
rustc_lexer::unescape::EscapeError::ZeroChars => EscapeError::ZeroChars,
rustc_lexer::unescape::EscapeError::MoreThanOneChar => EscapeError::MoreThanOneChar,
rustc_lexer::unescape::EscapeError::LoneSlash => EscapeError::LoneSlash,
rustc_lexer::unescape::EscapeError::InvalidEscape => EscapeError::InvalidEscape,
rustc_lexer::unescape::EscapeError::BareCarriageReturn
| rustc_lexer::unescape::EscapeError::BareCarriageReturnInRawString => {
EscapeError::BareCarriageReturn
}
rustc_lexer::unescape::EscapeError::EscapeOnlyChar => EscapeError::EscapeOnlyChar,
rustc_lexer::unescape::EscapeError::TooShortHexEscape => EscapeError::TooShortHexEscape,
rustc_lexer::unescape::EscapeError::InvalidCharInHexEscape => {
EscapeError::InvalidCharInHexEscape
}
rustc_lexer::unescape::EscapeError::OutOfRangeHexEscape => {
EscapeError::OutOfRangeHexEscape
}
rustc_lexer::unescape::EscapeError::NoBraceInUnicodeEscape => {
EscapeError::NoBraceInUnicodeEscape
}
rustc_lexer::unescape::EscapeError::InvalidCharInUnicodeEscape => {
EscapeError::InvalidCharInUnicodeEscape
}
rustc_lexer::unescape::EscapeError::EmptyUnicodeEscape => {
EscapeError::EmptyUnicodeEscape
}
rustc_lexer::unescape::EscapeError::UnclosedUnicodeEscape => {
EscapeError::UnclosedUnicodeEscape
}
rustc_lexer::unescape::EscapeError::LeadingUnderscoreUnicodeEscape => {
EscapeError::LeadingUnderscoreUnicodeEscape
}
rustc_lexer::unescape::EscapeError::OverlongUnicodeEscape => {
EscapeError::OverlongUnicodeEscape
}
rustc_lexer::unescape::EscapeError::LoneSurrogateUnicodeEscape => {
EscapeError::LoneSurrogateUnicodeEscape
}
rustc_lexer::unescape::EscapeError::OutOfRangeUnicodeEscape => {
EscapeError::OutOfRangeUnicodeEscape
}
rustc_lexer::unescape::EscapeError::UnicodeEscapeInByte => {
EscapeError::UnicodeEscapeInByte
}
rustc_lexer::unescape::EscapeError::NonAsciiCharInByte
| rustc_lexer::unescape::EscapeError::NonAsciiCharInByteString => {
EscapeError::NonAsciiCharInByte
}
}
}
}
impl From<rustc_lexer::unescape::EscapeError> for SyntaxErrorKind {
fn from(err: rustc_lexer::unescape::EscapeError) -> Self {
SyntaxErrorKind::EscapeError(err.into())
}
}
pub(crate) fn validate(root: &SyntaxNode) -> Vec<SyntaxError> {
let mut errors = Vec::new();
for node in root.descendants() {
match_ast! {
match node {
ast::Literal(it) => { validate_literal(it, &mut errors) },
ast::BlockExpr(it) => { block::validate_block_expr(it, &mut errors) },
ast::FieldExpr(it) => { validate_numeric_name(it.name_ref(), &mut errors) },
ast::RecordField(it) => { validate_numeric_name(it.name_ref(), &mut errors) },
_ => (),
}
}
}
errors
}
// FIXME: kill duplication
fn validate_literal(literal: ast::Literal, acc: &mut Vec<SyntaxError>) {
let token = literal.token();
let text = token.text().as_str();
match token.kind() {
BYTE => {
if let Some(end) = text.rfind('\'') {
if let Some(without_quotes) = text.get(2..end) {
if let Err((off, err)) = unescape::unescape_byte(without_quotes) {
let off = token.text_range().start() + TextUnit::from_usize(off + 2);
acc.push(SyntaxError::new(err.into(), off))
}
}
}
}
CHAR => {
if let Some(end) = text.rfind('\'') {
if let Some(without_quotes) = text.get(1..end) {
if let Err((off, err)) = unescape::unescape_char(without_quotes) {
let off = token.text_range().start() + TextUnit::from_usize(off + 1);
acc.push(SyntaxError::new(err.into(), off))
}
}
}
}
BYTE_STRING => {
if let Some(end) = text.rfind('\"') {
if let Some(without_quotes) = text.get(2..end) {
unescape::unescape_byte_str(without_quotes, &mut |range, char| {
if let Err(err) = char {
let off = range.start;
let off = token.text_range().start() + TextUnit::from_usize(off + 2);
acc.push(SyntaxError::new(err.into(), off))
}
})
}
}
}
STRING => {
if let Some(end) = text.rfind('\"') {
if let Some(without_quotes) = text.get(1..end) {
unescape::unescape_str(without_quotes, &mut |range, char| {
if let Err(err) = char {
let off = range.start;
let off = token.text_range().start() + TextUnit::from_usize(off + 1);
acc.push(SyntaxError::new(err.into(), off))
}
})
}
}
}
_ => (),
}
}
pub(crate) fn validate_block_structure(root: &SyntaxNode) {
let mut stack = Vec::new();
for node in root.descendants() {
match node.kind() {
T!['{'] => stack.push(node),
T!['}'] => {
if let Some(pair) = stack.pop() {
assert_eq!(
node.parent(),
pair.parent(),
"\nunpaired curleys:\n{}\n{:#?}\n",
root.text(),
root,
);
assert!(
node.next_sibling().is_none() && pair.prev_sibling().is_none(),
"\nfloating curlys at {:?}\nfile:\n{}\nerror:\n{}\n",
node,
root.text(),
node.text(),
);
}
}
_ => (),
}
}
}
fn validate_numeric_name(name_ref: Option<ast::NameRef>, errors: &mut Vec<SyntaxError>) {
if let Some(int_token) = int_token(name_ref) {
if int_token.text().chars().any(|c| !c.is_digit(10)) {
errors.push(SyntaxError::new(
SyntaxErrorKind::InvalidTupleIndexFormat,
int_token.text_range(),
));
}
}
fn int_token(name_ref: Option<ast::NameRef>) -> Option<SyntaxToken> {
name_ref?.syntax().first_child_or_token()?.into_token().filter(|it| it.kind() == INT_NUMBER)
}
}
|
