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use crate::parsing::ParseError; use std::fmt; use text_size::{TextRange, TextSize}; #[derive(Debug, Clone, PartialEq, Eq, Hash)] pub enum Location { Offset(TextSize), Range(TextRange), } impl Into<Location> for TextSize { fn into(self) -> Location { Location::Offset(self) } } impl Into<Location> for TextRange { fn into(self) -> Location { Location::Range(self) } } impl Location { pub fn offset(&self) -> TextSize { match &self { Location::Offset(offset) => *offset, Location::Range(range) => range.start(), } } pub fn end_offset(&self) -> TextSize { match &self { Location::Offset(offset) => *offset, Location::Range(range) => range.end(), } } pub fn add_offset(&self, plus_offset: TextSize, minus_offset: TextSize) -> Location { match &self { Location::Range(range) => Location::Range(range + plus_offset - minus_offset), Location::Offset(offset) => Location::Offset(offset + plus_offset - minus_offset), } } } #[derive(Debug, Clone, PartialEq, Eq, Hash)] pub struct SyntaxError { kind: SyntaxErrorKind, location: Location, } impl SyntaxError { pub fn new<L: Into<Location>>(kind: SyntaxErrorKind, loc: L) -> SyntaxError { SyntaxError { kind, location: loc.into(), } } pub fn kind(&self) -> SyntaxErrorKind { self.kind.clone() } pub fn location(&self) -> Location { self.location.clone() } } impl fmt::Display for SyntaxError { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { self.kind.fmt(f) } } #[derive(Debug, Clone, PartialEq, Eq, Hash)] pub enum SyntaxErrorKind { ParseError(ParseError), } impl fmt::Display for SyntaxErrorKind { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { use self::SyntaxErrorKind::*; match self { ParseError(msg) => write!(f, "{}", msg.0), } } }