ilex 0.6.0

quick and easy lexers for C-like languages
Documentation 
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use ilex::rule::*;
use ilex::testing;
use ilex::Context;
use ilex::Lexeme;

#[ilex::spec]
struct Spec {
  #[rule("null")]
  kw: Lexeme<Keyword>,
  #[rule("-null")]
  kw2: Lexeme<Keyword>,
  #[rule(")null")]
  kw3: Lexeme<Keyword>,

  #[rule(Comment::nesting(Bracket::rust_style(
      "/",
      ("-", ""),
      ("", "-"),
    )))]
  cm: Lexeme<Comment>,
  #[rule(Comment::nesting(Bracket::cxx_style(
      Ident::new().min_len(1),
      ("--", ""),
      ("", ""),
    )))]
  cm2: Lexeme<Comment>,
  #[rule(Bracket::cxx_style(
      Ident::new(),
      ("$", "["),
      ("]", ""),
    ))]
  br: Lexeme<Bracket>,
  #[rule(Ident::new()
    .prefix("/")
    .suffixes(["", "%q", "/"]))]
  id: Lexeme<Ident>,
  #[rule(Digital::new(10)
      .prefixes(["", "%"])
      .suffixes(["", "%", "q", "/"]))]
  nm: Lexeme<Digital>,
  #[rule(Quoted::new("'")
      .prefixes(["%", "q"])
      .suffixes(["", "%", "q"]))]
  st: Lexeme<Quoted>,
  #[rule(Quoted::with(Bracket::cxx_style(
        Ident::new(),
        ("q", "("),
        (")", ""),
      )))]
  st2: Lexeme<Quoted>,
}

#[test]
fn no_xid_after_kw() {
  let ctx = Context::new();
  let report = ctx.new_report();
  let _ = ctx
    .new_file("<input>", "null nullable")
    .lex(Spec::get().spec(), &report);

  testing::check_report(&report, "tests/ui/goldens/no_xid_after_kw.stdout");
}

#[test]
fn no_xid_after_br() {
  let ctx = Context::new();
  let report = ctx.new_report();
  let _ = ctx
    .new_file("<input>", "$[] $null[]null $null[]nullable")
    .lex(Spec::get().spec(), &report);

  testing::check_report(&report, "tests/ui/goldens/no_xid_after_br.stdout");
}

#[test]
fn no_xid_after_cm() {
  let ctx = Context::new();
  let report = ctx.new_report();
  let _ = ctx
    .new_file(
      "<input>",
      "--null some stuff null --null some more stuff nullnull",
    )
    .lex(Spec::get().spec(), &report);

  testing::check_report(&report, "tests/ui/goldens/no_xid_after_cm.stdout");
}

#[test]
fn no_xid_after_id() {
  let ctx = Context::new();
  let report = ctx.new_report();
  let _ = ctx
    .new_file("<input>", "/foo%q /null%q /foo%qua")
    .lex(Spec::get().spec(), &report);

  testing::check_report(&report, "tests/ui/goldens/no_xid_after_id.stdout");
}

#[test]
fn no_xid_after_nm() {
  let ctx = Context::new();
  let report = ctx.new_report();
  let _ = ctx
    .new_file("<input>", "%123 %123qua")
    .lex(Spec::get().spec(), &report);

  testing::check_report(&report, "tests/ui/goldens/no_xid_after_nm.stdout");
}

#[test]
fn no_xid_after_st() {
  let ctx = Context::new();
  let report = ctx.new_report();
  let _ = ctx
    .new_file("<input>", "q'xyz'q %'xyz'qua")
    .lex(Spec::get().spec(), &report);

  testing::check_report(&report, "tests/ui/goldens/no_xid_after_st.stdout");
}

#[test]
fn ambiguous_idents() {
  let ctx = Context::new();
  let report = ctx.new_report();
  let _ = ctx
    .new_file("<input>", "/foo/bar/")
    .lex(Spec::get().spec(), &report);

  testing::check_report(&report, "tests/ui/goldens/ambiguous_idents.stdout");
}

#[test]
fn ambiguous_nums() {
  let ctx = Context::new();
  let report = ctx.new_report();
  let _ = ctx
    .new_file("<input>", "1234%1234 1234/xyz")
    .lex(Spec::get().spec(), &report);

  testing::check_report(&report, "tests/ui/goldens/ambiguous_nums.stdout");
}

#[test]
fn symbols_after_comment() {
  let ctx = Context::new();
  let report = ctx.new_report();
  let _ = ctx
    .new_file(
      "<input>",
      // Below, we expect -/ more comment /- to lex correctly, then lex a
      // -null and a null, even though if it wasn't a comment, it would be
      // ambiguous, because `--null null`` is also a valid comment.
      "-/ comment /- null -/ more comment /--null null",
    )
    .lex(Spec::get().spec(), &report);

  testing::check_report_ok(&report);
}

#[test]
fn symbols_after_quoted() {
  let ctx = Context::new();
  let report = ctx.new_report();
  let _ = ctx
    .new_file(
      "<input>",
      // Below, we expect to lex a single quoted, even though `a]null` is a
      // keyword. This is because searching for ambiguities stops just shy of
      // the '.
      "qnull(a)null",
    )
    .lex(Spec::get().spec(), &report);

  testing::check_report_ok(&report);
}