316 lines
12 KiB
Rust
316 lines
12 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(plugin)]
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extern crate syntax;
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extern crate rustc;
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#[macro_use]
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extern crate log;
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use std::collections::HashMap;
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use std::io::File;
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use syntax::parse;
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use syntax::parse::lexer;
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use rustc::session::{self, config};
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use syntax::ast;
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use syntax::ast::Name;
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use syntax::codemap::Pos;
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use syntax::parse::token;
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use syntax::parse::lexer::TokenAndSpan;
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fn parse_token_list(file: &str) -> HashMap<String, token::Token> {
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fn id() -> token::Token {
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token::Ident(ast::Ident { name: Name(0), ctxt: 0, }, token::Plain)
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}
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let mut res = HashMap::new();
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res.insert("-1".to_string(), token::Eof);
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for line in file.split('\n') {
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let eq = match line.trim().rfind('=') {
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Some(val) => val,
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None => continue
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};
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let val = &line[..eq];
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let num = &line[eq + 1..];
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let tok = match val {
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"SHR" => token::BinOp(token::Shr),
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"DOLLAR" => token::Dollar,
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"LT" => token::Lt,
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"STAR" => token::BinOp(token::Star),
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"FLOAT_SUFFIX" => id(),
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"INT_SUFFIX" => id(),
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"SHL" => token::BinOp(token::Shl),
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"LBRACE" => token::OpenDelim(token::Brace),
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"RARROW" => token::RArrow,
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"LIT_STR" => token::Literal(token::Str_(Name(0)), None),
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"DOTDOT" => token::DotDot,
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"MOD_SEP" => token::ModSep,
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"DOTDOTDOT" => token::DotDotDot,
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"NOT" => token::Not,
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"AND" => token::BinOp(token::And),
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"LPAREN" => token::OpenDelim(token::Paren),
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"ANDAND" => token::AndAnd,
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"AT" => token::At,
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"LBRACKET" => token::OpenDelim(token::Bracket),
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"LIT_STR_RAW" => token::Literal(token::StrRaw(Name(0), 0), None),
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"RPAREN" => token::CloseDelim(token::Paren),
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"SLASH" => token::BinOp(token::Slash),
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"COMMA" => token::Comma,
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"LIFETIME" => token::Lifetime(ast::Ident { name: Name(0), ctxt: 0 }),
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"CARET" => token::BinOp(token::Caret),
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"TILDE" => token::Tilde,
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"IDENT" => id(),
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"PLUS" => token::BinOp(token::Plus),
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"LIT_CHAR" => token::Literal(token::Char(Name(0)), None),
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"LIT_BYTE" => token::Literal(token::Byte(Name(0)), None),
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"EQ" => token::Eq,
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"RBRACKET" => token::CloseDelim(token::Bracket),
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"COMMENT" => token::Comment,
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"DOC_COMMENT" => token::DocComment(Name(0)),
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"DOT" => token::Dot,
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"EQEQ" => token::EqEq,
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"NE" => token::Ne,
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"GE" => token::Ge,
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"PERCENT" => token::BinOp(token::Percent),
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"RBRACE" => token::CloseDelim(token::Brace),
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"BINOP" => token::BinOp(token::Plus),
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"POUND" => token::Pound,
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"OROR" => token::OrOr,
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"LIT_INTEGER" => token::Literal(token::Integer(Name(0)), None),
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"BINOPEQ" => token::BinOpEq(token::Plus),
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"LIT_FLOAT" => token::Literal(token::Float(Name(0)), None),
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"WHITESPACE" => token::Whitespace,
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"UNDERSCORE" => token::Underscore,
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"MINUS" => token::BinOp(token::Minus),
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"SEMI" => token::Semi,
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"COLON" => token::Colon,
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"FAT_ARROW" => token::FatArrow,
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"OR" => token::BinOp(token::Or),
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"GT" => token::Gt,
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"LE" => token::Le,
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"LIT_BINARY" => token::Literal(token::Binary(Name(0)), None),
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"LIT_BINARY_RAW" => token::Literal(token::BinaryRaw(Name(0), 0), None),
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"QUESTION" => token::Question,
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_ => continue,
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};
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res.insert(num.to_string(), tok);
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}
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debug!("Token map: {:?}", res);
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res
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}
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fn str_to_binop(s: &str) -> token::BinOpToken {
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match s {
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"+" => token::Plus,
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"/" => token::Slash,
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"-" => token::Minus,
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"*" => token::Star,
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"%" => token::Percent,
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"^" => token::Caret,
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"&" => token::And,
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"|" => token::Or,
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"<<" => token::Shl,
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">>" => token::Shr,
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_ => panic!("Bad binop str `{}`", s),
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}
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}
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/// Assuming a string/binary literal, strip out the leading/trailing
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/// hashes and surrounding quotes/raw/binary prefix.
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fn fix(mut lit: &str) -> ast::Name {
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if lit.char_at(0) == 'r' {
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if lit.char_at(1) == 'b' {
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lit = &lit[2..]
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} else {
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lit = &lit[1..];
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}
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} else if lit.char_at(0) == 'b' {
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lit = &lit[1..];
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}
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let leading_hashes = count(lit);
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// +1/-1 to adjust for single quotes
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parse::token::intern(&lit[leading_hashes + 1..lit.len() - leading_hashes - 1])
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}
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/// Assuming a char/byte literal, strip the 'b' prefix and the single quotes.
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fn fixchar(mut lit: &str) -> ast::Name {
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if lit.char_at(0) == 'b' {
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lit = &lit[1..];
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}
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parse::token::intern(&lit[1..lit.len() - 1])
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}
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fn count(lit: &str) -> usize {
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lit.chars().take_while(|c| *c == '#').count()
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}
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fn parse_antlr_token(s: &str, tokens: &HashMap<String, token::Token>) -> TokenAndSpan {
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// old regex:
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// \[@(?P<seq>\d+),(?P<start>\d+):(?P<end>\d+)='(?P<content>.+?)',<(?P<toknum>-?\d+)>,\d+:\d+]
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let start = s.find_str("[@").unwrap();
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let comma = start + s[start..].find_str(",").unwrap();
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let colon = comma + s[comma..].find_str(":").unwrap();
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let content_start = colon + s[colon..].find_str("='").unwrap();
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let content_end = content_start + s[content_start..].find_str("',<").unwrap();
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let toknum_end = content_end + s[content_end..].find_str(">,").unwrap();
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let start = &s[comma + 1 .. colon];
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let end = &s[colon + 1 .. content_start];
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let content = &s[content_start + 2 .. content_end];
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let toknum = &s[content_end + 3 .. toknum_end];
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let proto_tok = tokens.get(toknum).expect(format!("didn't find token {:?} in the map",
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toknum));
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let nm = parse::token::intern(content);
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debug!("What we got: content (`{}`), proto: {:?}", content, proto_tok);
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let real_tok = match *proto_tok {
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token::BinOp(..) => token::BinOp(str_to_binop(content)),
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token::BinOpEq(..) => token::BinOpEq(str_to_binop(&content[..content.len() - 1])),
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token::Literal(token::Str_(..), n) => token::Literal(token::Str_(fix(content)), n),
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token::Literal(token::StrRaw(..), n) => token::Literal(token::StrRaw(fix(content),
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count(content)), n),
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token::Literal(token::Char(..), n) => token::Literal(token::Char(fixchar(content)), n),
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token::Literal(token::Byte(..), n) => token::Literal(token::Byte(fixchar(content)), n),
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token::DocComment(..) => token::DocComment(nm),
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token::Literal(token::Integer(..), n) => token::Literal(token::Integer(nm), n),
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token::Literal(token::Float(..), n) => token::Literal(token::Float(nm), n),
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token::Literal(token::Binary(..), n) => token::Literal(token::Binary(nm), n),
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token::Literal(token::BinaryRaw(..), n) => token::Literal(token::BinaryRaw(fix(content),
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count(content)), n),
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token::Ident(..) => token::Ident(ast::Ident { name: nm, ctxt: 0 },
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token::ModName),
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token::Lifetime(..) => token::Lifetime(ast::Ident { name: nm, ctxt: 0 }),
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ref t => t.clone()
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};
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let offset = if real_tok == token::Eof
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{
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1
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} else {
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0
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};
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let sp = syntax::codemap::Span {
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lo: syntax::codemap::BytePos(start.parse::<u32>().unwrap() - offset),
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hi: syntax::codemap::BytePos(end.parse::<u32>().unwrap() + 1),
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expn_id: syntax::codemap::NO_EXPANSION
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};
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TokenAndSpan {
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tok: real_tok,
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sp: sp
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}
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}
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fn tok_cmp(a: &token::Token, b: &token::Token) -> bool {
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match a {
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&token::Ident(id, _) => match b {
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&token::Ident(id2, _) => id == id2,
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_ => false
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},
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_ => a == b
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}
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}
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fn span_cmp(rust_sp: syntax::codemap::Span, antlr_sp: syntax::codemap::Span, cm: &syntax::codemap::CodeMap) -> bool {
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println!("{} {}", cm.bytepos_to_file_charpos(rust_sp.lo).to_uint(), cm.bytepos_to_file_charpos(rust_sp.hi).to_uint());
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antlr_sp.lo.to_uint() == cm.bytepos_to_file_charpos(rust_sp.lo).to_uint() &&
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antlr_sp.hi.to_uint() == cm.bytepos_to_file_charpos(rust_sp.hi).to_uint() &&
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antlr_sp.expn_id == rust_sp.expn_id
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}
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fn main() {
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fn next(r: &mut lexer::StringReader) -> TokenAndSpan {
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use syntax::parse::lexer::Reader;
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r.next_token()
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}
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let args = std::os::args();
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let mut token_file = File::open(&Path::new(args[2]));
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let token_map = parse_token_list(token_file.read_to_string().unwrap());
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let mut stdin = std::io::stdin();
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let mut lock = stdin.lock();
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let lines = lock.lines();
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let mut antlr_tokens = lines.map(|l| parse_antlr_token(l.unwrap().trim(),
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&token_map));
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let code = File::open(&Path::new(args[1])).unwrap().read_to_string().unwrap();
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let options = config::basic_options();
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let session = session::build_session(options, None,
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syntax::diagnostics::registry::Registry::new(&[]));
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let filemap = parse::string_to_filemap(&session.parse_sess,
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code,
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String::from_str("<n/a>"));
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let mut lexer = lexer::StringReader::new(session.diagnostic(), filemap);
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let ref cm = lexer.span_diagnostic.cm;
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for antlr_tok in antlr_tokens {
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let rustc_tok = next(&mut lexer);
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if rustc_tok.tok == token::Eof && antlr_tok.tok == token::Eof {
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continue
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}
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assert!(span_cmp(rustc_tok.sp, antlr_tok.sp, cm), "{:?} and {:?} have different spans", rustc_tok,
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antlr_tok);
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macro_rules! matches {
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( $($x:pat),+ ) => (
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match rustc_tok.tok {
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$($x => match antlr_tok.tok {
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$x => {
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if !tok_cmp(&rustc_tok.tok, &antlr_tok.tok) {
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// FIXME #15677: needs more robust escaping in
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// antlr
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warn!("Different names for {:?} and {:?}", rustc_tok, antlr_tok);
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}
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}
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_ => panic!("{:?} is not {:?}", antlr_tok, rustc_tok)
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},)*
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ref c => assert!(c == &antlr_tok.tok, "{:?} is not {:?}", rustc_tok, antlr_tok)
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}
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)
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}
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matches!(
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token::Literal(token::Byte(..), _),
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token::Literal(token::Char(..), _),
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token::Literal(token::Integer(..), _),
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token::Literal(token::Float(..), _),
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token::Literal(token::Str_(..), _),
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token::Literal(token::StrRaw(..), _),
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token::Literal(token::Binary(..), _),
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token::Literal(token::BinaryRaw(..), _),
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token::Ident(..),
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token::Lifetime(..),
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token::Interpolated(..),
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token::DocComment(..),
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token::Shebang(..)
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);
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}
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}
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