aboutsummaryrefslogtreecommitdiff
path: root/tests/lexer/driver.cxx
blob: 55759562baa51fbd7681d1af592c9b4aeae788ab (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
// 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;
}