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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::{Error, 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 read_from<T>(reader: &mut TokenReader<T>) -> Result<Self>
where
T: Iterator<Item = erl_tokenize::Result<LexicalToken>>,
{
let _hyphen: SymbolToken = reader.read_expected(&Symbol::Hyphen)?;
let name: AtomToken = reader
.try_read()?
.ok_or_else(|| Error::unexpected_token(_hyphen.clone().into(), "-{DIRECTIVE_NAME}"))?;
reader.unread_token(name.clone().into());
reader.unread_token(_hyphen.into());
match name.value() {
"include" => reader.read().map(Directive::Include),
"include_lib" => reader.read().map(Directive::IncludeLib),
"define" => reader.read().map(Directive::Define),
"undef" => reader.read().map(Directive::Undef),
"ifdef" => reader.read().map(Directive::Ifdef),
"ifndef" => reader.read().map(Directive::Ifndef),
"else" => reader.read().map(Directive::Else),
"endif" => reader.read().map(Directive::Endif),
"error" => reader.read().map(Directive::Error),
"warning" => reader.read().map(Directive::Warning),
_ => {
let _hyphen: SymbolToken = reader.read_expected(&Symbol::Hyphen)?;
Err(Error::unexpected_token(_hyphen.into(), "-{DIRECTIVE_NAME}"))
}
}
}
}