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use erl_tokenize::tokens::{AtomToken, SymbolToken};
use erl_tokenize::values::Symbol;
use erl_tokenize::{LexicalToken, Position, PositionRange};
use std::fmt;
use crate::directives;
use crate::token_reader::{ReadFrom, TokenReader};
use crate::Result;
#[derive(Debug, Clone)]
#[allow(missing_docs)]
#[allow(clippy::large_enum_variant)]
pub enum Directive {
Include(directives::Include),
IncludeLib(directives::IncludeLib),
Define(directives::Define),
Undef(directives::Undef),
Ifdef(directives::Ifdef),
Ifndef(directives::Ifndef),
Else(directives::Else),
Endif(directives::Endif),
Error(directives::Error),
Warning(directives::Warning),
}
impl PositionRange for Directive {
fn start_position(&self) -> Position {
match *self {
Directive::Include(ref t) => t.start_position(),
Directive::IncludeLib(ref t) => t.start_position(),
Directive::Define(ref t) => t.start_position(),
Directive::Undef(ref t) => t.start_position(),
Directive::Ifdef(ref t) => t.start_position(),
Directive::Ifndef(ref t) => t.start_position(),
Directive::Else(ref t) => t.start_position(),
Directive::Endif(ref t) => t.start_position(),
Directive::Error(ref t) => t.start_position(),
Directive::Warning(ref t) => t.start_position(),
}
}
fn end_position(&self) -> Position {
match *self {
Directive::Include(ref t) => t.end_position(),
Directive::IncludeLib(ref t) => t.end_position(),
Directive::Define(ref t) => t.end_position(),
Directive::Undef(ref t) => t.end_position(),
Directive::Ifdef(ref t) => t.end_position(),
Directive::Ifndef(ref t) => t.end_position(),
Directive::Else(ref t) => t.end_position(),
Directive::Endif(ref t) => t.end_position(),
Directive::Error(ref t) => t.end_position(),
Directive::Warning(ref t) => t.end_position(),
}
}
}
impl fmt::Display for Directive {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Directive::Include(ref t) => t.fmt(f),
Directive::IncludeLib(ref t) => t.fmt(f),
Directive::Define(ref t) => t.fmt(f),
Directive::Undef(ref t) => t.fmt(f),
Directive::Ifdef(ref t) => t.fmt(f),
Directive::Ifndef(ref t) => t.fmt(f),
Directive::Else(ref t) => t.fmt(f),
Directive::Endif(ref t) => t.fmt(f),
Directive::Error(ref t) => t.fmt(f),
Directive::Warning(ref t) => t.fmt(f),
}
}
}
impl ReadFrom for Directive {
fn try_read_from<T, E>(reader: &mut TokenReader<T, E>) -> Result<Option<Self>>
where
T: Iterator<Item = ::std::result::Result<LexicalToken, E>>,
E: Into<crate::Error>,
{
let _hyphen: SymbolToken =
if let Some(_hyphen) = track!(reader.try_read_expected(&Symbol::Hyphen))? {
_hyphen
} else {
return Ok(None);
};
let name: AtomToken = if let Some(name) = track!(reader.try_read())? {
name
} else {
reader.unread_token(_hyphen.into());
return Ok(None);
};
reader.unread_token(name.clone().into());
reader.unread_token(_hyphen.into());
match name.value() {
"include" => track!(reader.read()).map(Directive::Include).map(Some),
"include_lib" => track!(reader.read()).map(Directive::IncludeLib).map(Some),
"define" => track!(reader.read()).map(Directive::Define).map(Some),
"undef" => track!(reader.read()).map(Directive::Undef).map(Some),
"ifdef" => track!(reader.read()).map(Directive::Ifdef).map(Some),
"ifndef" => track!(reader.read()).map(Directive::Ifndef).map(Some),
"else" => track!(reader.read()).map(Directive::Else).map(Some),
"endif" => track!(reader.read()).map(Directive::Endif).map(Some),
"error" => track!(reader.read()).map(Directive::Error).map(Some),
"warning" => track!(reader.read()).map(Directive::Warning).map(Some),
_ => Ok(None),
}
}
}