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// file : tests/build/lexer/driver.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <string>
#include <vector>
#include <cassert>
#include <sstream>
#include <iostream>
#include <build/token>
#include <build/lexer>
using namespace std;
using namespace build;
using tokens = vector<string>;
static tokens
lex (const char*);
ostream&
operator<< (ostream&, const tokens&);
int
main ()
{
ostream cnull (nullptr);
diag_stream = &cnull;
// Whitespaces.
//
assert (lex ("") == tokens ({""}));
assert (lex ("\n") == tokens ({""}));
assert (lex ("\n\n") == tokens ({""}));
assert (lex (" \t \n") == tokens ({""}));
assert (lex ("#comment") == tokens ({""}));
assert (lex (" #comment") == tokens ({""}));
assert (lex ("#comment\n") == tokens ({""}));
assert (lex ("#comment\\\n") == tokens ({""}));
assert (lex ("#comment 1\n#comment2") == tokens ({""}));
// Punctuation.
//
assert (lex (": \n { }") == tokens ({":", "\n", "{", "}", ""}));
// Names.
//
assert (lex ("foo") == tokens ({"foo", ""}));
assert (lex ("foo.bar") == tokens ({"foo.bar", ""}));
// Escaping.
//
assert (lex (" \\\n") == tokens ({""}));
assert (lex ("\\\nfoo") == tokens ({"foo", ""}));
assert (lex (" \\ foo") == tokens ({" foo", ""}));
assert (lex ("fo\\ o\\:") == tokens ({"fo o:", ""}));
assert (lex ("foo\\\nbar") == tokens ({"foobar", ""}));
assert (lex ("foo \\\nbar") == tokens ({"foo", "bar", ""}));
assert (lex ("\\'foo") == tokens ({"'foo", ""}));
assert (lex (" \\") == tokens ({"<lexer error>"}));
assert (lex (" foo\\") == tokens ({"<lexer error>"}));
// Quoting ''.
//
assert (lex ("''") == tokens ({"", ""}));
assert (lex ("'foo'") == tokens ({"foo", ""}));
assert (lex ("'foo bar'") == tokens ({"foo bar", ""}));
assert (lex ("'foo 'bar") == tokens ({"foo bar", ""}));
assert (lex ("foo' bar'") == tokens ({"foo bar", ""}));
assert (lex ("'foo ''bar'") == tokens ({"foo bar", ""}));
assert (lex ("foo' 'bar") == tokens ({"foo bar", ""}));
assert (lex ("'foo\nbar'") == tokens ({"foo\nbar", ""}));
assert (lex ("'#:${}()=+\n'") == tokens ({"#:${}()=+\n", ""}));
assert (lex ("'\"'") == tokens ({"\"", ""}));
assert (lex ("'\\'") == tokens ({"\\", ""}));
assert (lex ("'foo bar") == tokens ({"<lexer error>"}));
// Quoting "".
//
assert (lex ("\"\"") == tokens ({"", ""}));
assert (lex ("\"foo\"") == tokens ({"foo", ""}));
assert (lex ("\"foo bar\"") == tokens ({"foo bar", ""}));
assert (lex ("\"foo \"bar") == tokens ({"foo bar", ""}));
assert (lex ("foo\" bar\"") == tokens ({"foo bar", ""}));
assert (lex ("\"foo \"\"bar\"") == tokens ({"foo bar", ""}));
assert (lex ("foo\" \"bar") == tokens ({"foo bar", ""}));
assert (lex ("\"foo\nbar\"") == tokens ({"foo\nbar", ""}));
assert (lex ("\"#:{})=+\n\"") == tokens ({"#:{})=+\n", ""}));
assert (lex ("\"'\"") == tokens ({"'", ""}));
assert (lex ("\"\\\"") == tokens ({"\\", ""}));
assert (lex ("\"$\"") == tokens ({"", "$", "", ""}));
assert (lex ("\"foo$bar\"") == tokens ({"foo", "$", "bar", ""}));
assert (lex ("foo\"$\"bar") == tokens ({"foo", "$", "bar", ""}));
assert (lex ("f\"oo$ba\"r") == tokens ({"foo", "$", "bar", ""}));
assert (lex ("\"foo bar") == tokens ({"<lexer error>"}));
assert (lex ("\"foo $") == tokens ({"foo ", "$", "<lexer error>"}));
assert (lex ("\"foo $bar") == tokens ({"foo ", "$", "<lexer error>"}));
// Combinations.
//
assert (lex ("foo: bar") == tokens ({"foo", ":", "bar", ""}));
assert (lex ("\n \nfoo: bar") == tokens ({"foo", ":", "bar", ""}));
assert (lex ("foo: bar\n") == tokens ({"foo", ":", "bar", "\n", ""}));
assert (lex ("foo: bar#comment") == tokens ({"foo", ":", "bar", ""}));
assert (lex ("exe{foo}: obj{bar}") ==
tokens ({"exe", "{", "foo", "}", ":", "obj", "{", "bar", "}", ""}));
assert (lex ("foo: bar\nbaz: biz") ==
tokens ({"foo", ":", "bar", "\n", "baz", ":", "biz", ""}));
assert (lex ("foo: bar#comment\nbaz: biz") ==
tokens ({"foo", ":", "bar", "\n", "baz", ":", "biz", ""}));
assert (lex ("foo:#comment \\\nbar") ==
tokens ({"foo", ":", "\n", "bar", ""}));
}
static tokens
lex (const char* s)
{
tokens r;
istringstream is (s);
is.exceptions (istream::failbit | istream::badbit);
lexer l (is, "");
try
{
for (token t (l.next ());; t = l.next ())
{
string v;
switch (t.type)
{
case token_type::eos: v = ""; break;
case token_type::newline: v = "\n"; break;
case token_type::pair_separator: v = l.pair_separator (); break;
case token_type::colon: v = ":"; break;
case token_type::lcbrace: v = "{"; break;
case token_type::rcbrace: v = "}"; break;
case token_type::equal: v = "="; break;
case token_type::plus_equal: v = "+="; break;
case token_type::dollar: v = "$"; break;
case token_type::lparen: v = "("; break;
case token_type::rparen: v = ")"; break;
case token_type::name: v = t.value.c_str (); break;
}
// cerr << t.line () << ':' << t.column () << ':' << v << endl;
r.push_back (move (v));
if (t.type == token_type::eos)
break;
}
}
catch (const failed&)
{
r.push_back ("<lexer error>");
}
catch (const io_error&)
{
r.push_back ("<io error>");
}
return r;
}
ostream&
operator<< (ostream& os, const tokens& ts)
{
for (const string& t: ts)
os << '"' << t << '"' << ' ';
return os;
}
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