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// Copyright 2019 Fredrik Portström <https://portstrom.com>
// This is free software distributed under the terms specified in
// the file LICENSE at the top-level directory of this distribution.
use std::fmt;
/// Warning from the parser telling that something is not well-formed.
#[derive(Debug)]
pub struct Warning {
/// The byte position in the wiki text where the warning ends.
pub end: usize,
/// An identifier for the kind of warning.
pub message: WarningMessage,
/// The byte position in the wiki text where the warning starts.
pub start: usize,
}
/// Identifier for a kind of warning from the parser.
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
pub enum WarningMessage {
/// List broken by definition term.
DefinitionTermContinuation,
/// End tag in comment.
EndTagInComment,
/// Invalid character.
InvalidCharacter,
/// Invalid heading syntax. Rewinding.
InvalidHeadingSyntaxRewinding,
/// Invalid link syntax.
InvalidLinkSyntax,
/// Invalid parameter syntax.
InvalidParameterSyntax,
/// Invalid tag syntax.
InvalidTagSyntax,
/// Missing end tag. Rewinding.
MissingEndTagRewinding,
/// Repeated empty line.
RepeatedEmptyLine,
/// Stray text in table.
StrayTextInTable,
/// Wiki text comes after a redirect.
TextAfterRedirect,
/// The end tag does not match the last start tag. Rewinding.
UnexpectedEndTagRewinding,
/// An end tag was found with no preceeding start tag.
UnexpectedEndTag,
/// Expected heading of higher level. Correcting start of heading.
UnexpectedHeadingLevelCorrecting,
/// A tag with an unrecognized tag name was found.
UnrecognizedTagName,
/// Useless text in parameter.
UselessTextInParameter,
/// Useless text in redirect.
UselessTextInRedirect,
}
impl WarningMessage {
/// Human-readable description of the warning.
pub fn message(self) -> &'static str {
match self {
WarningMessage::DefinitionTermContinuation => "List broken by definition term.",
WarningMessage::EndTagInComment => "End tag in comment.",
WarningMessage::InvalidCharacter => "Invalid character.",
WarningMessage::InvalidHeadingSyntaxRewinding => "Invalid heading syntax. Rewinding.",
WarningMessage::InvalidLinkSyntax => "Invalid link syntax.",
WarningMessage::InvalidParameterSyntax => "Invalid parameter syntax.",
WarningMessage::InvalidTagSyntax => "Invalid tag syntax.",
WarningMessage::MissingEndTagRewinding => "Missing end tag. Rewinding.",
WarningMessage::RepeatedEmptyLine => "Repeated empty line.",
WarningMessage::StrayTextInTable => "Stray text in table.",
WarningMessage::TextAfterRedirect => "Wiki text comes after a redirect.",
WarningMessage::UnexpectedEndTagRewinding => {
"The end tag does not match the last start tag. Rewinding."
}
WarningMessage::UnexpectedEndTag => {
"An end tag was found with no preceeding start tag."
}
WarningMessage::UnexpectedHeadingLevelCorrecting => {
"Expected heading of higher level. Correcting start of heading."
}
WarningMessage::UnrecognizedTagName => "A tag with an unrecognized tag name was found.",
WarningMessage::UselessTextInParameter => "Useless text in parameter.",
WarningMessage::UselessTextInRedirect => "Useless text in redirect.",
}
}
}
impl fmt::Display for WarningMessage {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str(self.message())
}
}
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