143 lines
4.6 KiB
Rust
143 lines
4.6 KiB
Rust
use std::fmt;
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use crate::{TextRange, TextUnit};
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#[derive(Debug, Clone, PartialEq, Eq, Hash)]
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pub struct SyntaxError {
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kind: SyntaxErrorKind,
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location: Location,
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}
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#[derive(Debug, Clone, PartialEq, Eq, Hash)]
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pub enum Location {
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Offset(TextUnit),
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Range(TextRange),
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}
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impl Into<Location> for TextUnit {
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fn into(self) -> Location {
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Location::Offset(self)
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}
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}
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impl Into<Location> for TextRange {
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fn into(self) -> Location {
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Location::Range(self)
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}
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}
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impl SyntaxError {
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pub fn new<L: Into<Location>>(kind: SyntaxErrorKind, loc: L) -> SyntaxError {
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SyntaxError {
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kind,
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location: loc.into(),
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}
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}
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pub fn kind(&self) -> SyntaxErrorKind {
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self.kind.clone()
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}
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pub fn location(&self) -> Location {
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self.location.clone()
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}
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pub fn offset(&self) -> TextUnit {
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match self.location {
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Location::Offset(offset) => offset,
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Location::Range(range) => range.start(),
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}
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}
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pub fn add_offset(mut self, plus_offset: TextUnit) -> SyntaxError {
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self.location = match self.location {
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Location::Range(range) => Location::Range(range + plus_offset),
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Location::Offset(offset) => Location::Offset(offset + plus_offset),
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};
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self
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}
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}
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impl fmt::Display for SyntaxError {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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self.kind.fmt(f)
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq, Hash)]
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pub enum SyntaxErrorKind {
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ParseError(ParseError),
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UnescapedCodepoint,
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EmptyChar,
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UnclosedChar,
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OverlongChar,
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EmptyByte,
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UnclosedByte,
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OverlongByte,
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ByteOutOfRange,
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UnescapedByte,
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EmptyByteEscape,
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InvalidByteEscape,
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TooShortByteCodeEscape,
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MalformedByteCodeEscape,
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UnicodeEscapeForbidden,
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EmptyAsciiEscape,
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InvalidAsciiEscape,
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TooShortAsciiCodeEscape,
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AsciiCodeEscapeOutOfRange,
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MalformedAsciiCodeEscape,
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UnclosedUnicodeEscape,
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MalformedUnicodeEscape,
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EmptyUnicodeEcape,
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OverlongUnicodeEscape,
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UnicodeEscapeOutOfRange,
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UnclosedString,
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InvalidSuffix,
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}
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#[derive(Debug, Clone, PartialEq, Eq, Hash)]
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pub struct ParseError(pub String);
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impl fmt::Display for SyntaxErrorKind {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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use self::SyntaxErrorKind::*;
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match self {
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UnescapedCodepoint => write!(f, "This codepoint should always be escaped"),
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EmptyAsciiEscape => write!(f, "Empty escape sequence"),
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InvalidAsciiEscape => write!(f, "Invalid escape sequence"),
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EmptyChar => write!(f, "Empty char literal"),
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UnclosedChar => write!(f, "Unclosed char literal"),
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OverlongChar => write!(f, "Char literal should be one character long"),
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EmptyByte => write!(f, "Empty byte literal"),
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UnclosedByte => write!(f, "Unclosed byte literal"),
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OverlongByte => write!(f, "Byte literal should be one character long"),
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ByteOutOfRange => write!(f, "Byte should be a valid ASCII character"),
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UnescapedByte => write!(f, "This byte should always be escaped"),
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EmptyByteEscape => write!(f, "Empty escape sequence"),
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InvalidByteEscape => write!(f, "Invalid escape sequence"),
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TooShortByteCodeEscape => write!(f, "Escape sequence should have two digits"),
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MalformedByteCodeEscape => write!(f, "Escape sequence should be a hexadecimal number"),
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UnicodeEscapeForbidden => write!(
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f,
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"Unicode escapes are not allowed in byte literals or byte strings"
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),
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TooShortAsciiCodeEscape => write!(f, "Escape sequence should have two digits"),
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AsciiCodeEscapeOutOfRange => {
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write!(f, "Escape sequence should be between \\x00 and \\x7F")
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}
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MalformedAsciiCodeEscape => write!(f, "Escape sequence should be a hexadecimal number"),
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UnclosedUnicodeEscape => write!(f, "Missing `}}`"),
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MalformedUnicodeEscape => write!(f, "Malformed unicode escape sequence"),
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EmptyUnicodeEcape => write!(f, "Empty unicode escape sequence"),
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OverlongUnicodeEscape => {
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write!(f, "Unicode escape sequence should have at most 6 digits")
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}
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UnicodeEscapeOutOfRange => write!(f, "Unicode escape code should be at most 0x10FFFF"),
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UnclosedString => write!(f, "Unclosed string literal"),
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InvalidSuffix => write!(f, "Invalid literal suffix"),
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ParseError(msg) => write!(f, "{}", msg.0),
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}
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}
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}
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