cmGeneratorExpressionEvaluator.cxx 65.7 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
/*============================================================================
  CMake - Cross Platform Makefile Generator
  Copyright 2012 Stephen Kelly <steveire@gmail.com>

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/
#include "cmMakefile.h"

#include "cmGeneratorExpressionEvaluator.h"
#include "cmGeneratorExpressionParser.h"
16
#include "cmGeneratorExpressionDAGChecker.h"
17
#include "cmGeneratorExpression.h"
18
19
#include "cmLocalGenerator.h"
#include "cmSourceFile.h"
20

21
22
#include <cmsys/String.h>

23
#include <assert.h>
Stephen Kelly's avatar
Stephen Kelly committed
24
#include <errno.h>
25

26
//----------------------------------------------------------------------------
27
28
29
30
#if !defined(__SUNPRO_CC) || __SUNPRO_CC > 0x510
static
#endif
void reportError(cmGeneratorExpressionContext *context,
31
32
33
34
35
36
37
38
39
40
41
42
43
                        const std::string &expr, const std::string &result)
{
  context->HadError = true;
  if (context->Quiet)
    {
    return;
    }

  cmOStringStream e;
  e << "Error evaluating generator expression:\n"
    << "  " << expr << "\n"
    << result;
  context->Makefile->GetCMakeInstance()
Stephen Kelly's avatar
Stephen Kelly committed
44
    ->IssueMessage(cmake::FATAL_ERROR, e.str(),
45
46
47
48
49
50
                    context->Backtrace);
}

//----------------------------------------------------------------------------
struct cmGeneratorExpressionNode
{
51
52
53
  enum {
    DynamicParameters = 0,
    OneOrMoreParameters = -1,
54
    OneOrZeroParameters = -2
55
  };
56
57
58
59
  virtual ~cmGeneratorExpressionNode() {}

  virtual bool GeneratesContent() const { return true; }

60
61
  virtual bool RequiresLiteralInput() const { return false; }

62
  virtual bool AcceptsArbitraryContentParameter() const
63
64
65
66
67
68
    { return false; }

  virtual int NumExpectedParameters() const { return 1; }

  virtual std::string Evaluate(const std::vector<std::string> &parameters,
                               cmGeneratorExpressionContext *context,
69
70
                               const GeneratorExpressionContent *content,
                               cmGeneratorExpressionDAGChecker *dagChecker
71
72
73
74
75
76
77
78
79
80
                              ) const = 0;
};

//----------------------------------------------------------------------------
static const struct ZeroNode : public cmGeneratorExpressionNode
{
  ZeroNode() {}

  virtual bool GeneratesContent() const { return false; }

81
  virtual bool AcceptsArbitraryContentParameter() const { return true; }
82

83
84
  std::string Evaluate(const std::vector<std::string> &,
                       cmGeneratorExpressionContext *,
85
86
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
87
88
89
90
91
92
93
94
95
96
  {
    return std::string();
  }
} zeroNode;

//----------------------------------------------------------------------------
static const struct OneNode : public cmGeneratorExpressionNode
{
  OneNode() {}

97
  virtual bool AcceptsArbitraryContentParameter() const { return true; }
98

99
  std::string Evaluate(const std::vector<std::string> &parameters,
100
                       cmGeneratorExpressionContext *,
101
102
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
103
  {
104
    return parameters.front();
105
106
107
  }
} oneNode;

108
109
110
111
112
113
//----------------------------------------------------------------------------
static const struct OneNode buildInterfaceNode;

//----------------------------------------------------------------------------
static const struct ZeroNode installInterfaceNode;

114
115
116
117
118
//----------------------------------------------------------------------------
#define BOOLEAN_OP_NODE(OPNAME, OP, SUCCESS_VALUE, FAILURE_VALUE) \
static const struct OP ## Node : public cmGeneratorExpressionNode \
{ \
  OP ## Node () {} \
119
  virtual int NumExpectedParameters() const { return OneOrMoreParameters; } \
120
121
122
 \
  std::string Evaluate(const std::vector<std::string> &parameters, \
                       cmGeneratorExpressionContext *context, \
123
124
                       const GeneratorExpressionContent *content, \
                       cmGeneratorExpressionDAGChecker *) const \
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
  { \
    std::vector<std::string>::const_iterator it = parameters.begin(); \
    const std::vector<std::string>::const_iterator end = parameters.end(); \
    for ( ; it != end; ++it) \
      { \
      if (*it == #FAILURE_VALUE) \
        { \
        return #FAILURE_VALUE; \
        } \
      else if (*it != #SUCCESS_VALUE) \
        { \
        reportError(context, content->GetOriginalExpression(), \
        "Parameters to $<" #OP "> must resolve to either '0' or '1'."); \
        return std::string(); \
        } \
      } \
    return #SUCCESS_VALUE; \
  } \
} OPNAME;

BOOLEAN_OP_NODE(andNode, AND, 1, 0)
BOOLEAN_OP_NODE(orNode, OR, 0, 1)

#undef BOOLEAN_OP_NODE

//----------------------------------------------------------------------------
static const struct NotNode : public cmGeneratorExpressionNode
{
  NotNode() {}
154

155
156
  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *context,
157
158
                       const GeneratorExpressionContent *content,
                       cmGeneratorExpressionDAGChecker *) const
159
160
161
162
163
164
165
166
167
168
169
  {
    if (*parameters.begin() != "0" && *parameters.begin() != "1")
      {
      reportError(context, content->GetOriginalExpression(),
            "$<NOT> parameter must resolve to exactly one '0' or '1' value.");
      return std::string();
      }
    return *parameters.begin() == "0" ? "1" : "0";
  }
} notNode;

170
171
172
173
174
175
176
177
178
//----------------------------------------------------------------------------
static const struct BoolNode : public cmGeneratorExpressionNode
{
  BoolNode() {}

  virtual int NumExpectedParameters() const { return 1; }

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *,
179
180
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
181
182
183
184
185
186
187
188
189
190
191
192
193
194
  {
    return !cmSystemTools::IsOff(parameters.begin()->c_str()) ? "1" : "0";
  }
} boolNode;

//----------------------------------------------------------------------------
static const struct StrEqualNode : public cmGeneratorExpressionNode
{
  StrEqualNode() {}

  virtual int NumExpectedParameters() const { return 2; }

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *,
195
196
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
197
  {
198
    return *parameters.begin() == parameters[1] ? "1" : "0";
199
200
201
  }
} strEqualNode;

Stephen Kelly's avatar
Stephen Kelly committed
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
//----------------------------------------------------------------------------
static const struct EqualNode : public cmGeneratorExpressionNode
{
  EqualNode() {}

  virtual int NumExpectedParameters() const { return 2; }

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *context,
                       const GeneratorExpressionContent *content,
                       cmGeneratorExpressionDAGChecker *) const
  {
    char *pEnd;

    int base = 0;
    bool flipSign = false;

    const char *lhs = parameters[0].c_str();
220
    if (cmHasLiteralPrefix(lhs, "0b") || cmHasLiteralPrefix(lhs, "0B"))
Stephen Kelly's avatar
Stephen Kelly committed
221
222
223
224
      {
      base = 2;
      lhs += 2;
      }
225
    if (cmHasLiteralPrefix(lhs, "-0b") || cmHasLiteralPrefix(lhs, "-0B"))
Stephen Kelly's avatar
Stephen Kelly committed
226
227
228
229
230
      {
      base = 2;
      lhs += 3;
      flipSign = true;
      }
231
    if (cmHasLiteralPrefix(lhs, "+0b") || cmHasLiteralPrefix(lhs, "+0B"))
Stephen Kelly's avatar
Stephen Kelly committed
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
      {
      base = 2;
      lhs += 3;
      }

    long lnum = strtol(lhs, &pEnd, base);
    if (pEnd == lhs || *pEnd != '\0' || errno == ERANGE)
      {
      reportError(context, content->GetOriginalExpression(),
          "$<EQUAL> parameter " + parameters[0] + " is not a valid integer.");
      return std::string();
      }

    if (flipSign)
      {
      lnum = -lnum;
      }

    base = 0;
    flipSign = false;

    const char *rhs = parameters[1].c_str();
254
    if (cmHasLiteralPrefix(rhs, "0b") || cmHasLiteralPrefix(rhs, "0B"))
Stephen Kelly's avatar
Stephen Kelly committed
255
256
257
258
      {
      base = 2;
      rhs += 2;
      }
259
    if (cmHasLiteralPrefix(rhs, "-0b") || cmHasLiteralPrefix(rhs, "-0B"))
Stephen Kelly's avatar
Stephen Kelly committed
260
261
262
263
264
      {
      base = 2;
      rhs += 3;
      flipSign = true;
      }
265
    if (cmHasLiteralPrefix(rhs, "+0b") || cmHasLiteralPrefix(rhs, "+0B"))
Stephen Kelly's avatar
Stephen Kelly committed
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
      {
      base = 2;
      rhs += 3;
      }

    long rnum = strtol(rhs, &pEnd, base);
    if (pEnd == rhs || *pEnd != '\0' || errno == ERANGE)
      {
      reportError(context, content->GetOriginalExpression(),
          "$<EQUAL> parameter " + parameters[1] + " is not a valid integer.");
      return std::string();
      }

    if (flipSign)
      {
      rnum = -rnum;
      }

    return lnum == rnum ? "1" : "0";
  }
} equalNode;

288
289
290
291
292
//----------------------------------------------------------------------------
static const struct LowerCaseNode : public cmGeneratorExpressionNode
{
  LowerCaseNode() {}

293
294
  bool AcceptsArbitraryContentParameter() const { return true; }

295
296
297
298
299
300
301
302
303
304
305
306
307
308
  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *,
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
  {
    return cmSystemTools::LowerCase(parameters.front());
  }
} lowerCaseNode;

//----------------------------------------------------------------------------
static const struct UpperCaseNode : public cmGeneratorExpressionNode
{
  UpperCaseNode() {}

309
310
  bool AcceptsArbitraryContentParameter() const { return true; }

311
312
313
314
315
316
317
318
319
320
321
322
323
324
  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *,
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
  {
    return cmSystemTools::UpperCase(parameters.front());
  }
} upperCaseNode;

//----------------------------------------------------------------------------
static const struct MakeCIdentifierNode : public cmGeneratorExpressionNode
{
  MakeCIdentifierNode() {}

325
326
  bool AcceptsArbitraryContentParameter() const { return true; }

327
328
329
330
331
332
333
334
335
  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *,
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
  {
    return cmSystemTools::MakeCidentifier(parameters.front().c_str());
  }
} makeCIdentifierNode;

336
337
338
339
340
341
342
343
344
//----------------------------------------------------------------------------
static const struct Angle_RNode : public cmGeneratorExpressionNode
{
  Angle_RNode() {}

  virtual int NumExpectedParameters() const { return 0; }

  std::string Evaluate(const std::vector<std::string> &,
                       cmGeneratorExpressionContext *,
345
346
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
347
348
349
350
351
352
353
354
355
356
357
358
359
360
  {
    return ">";
  }
} angle_rNode;

//----------------------------------------------------------------------------
static const struct CommaNode : public cmGeneratorExpressionNode
{
  CommaNode() {}

  virtual int NumExpectedParameters() const { return 0; }

  std::string Evaluate(const std::vector<std::string> &,
                       cmGeneratorExpressionContext *,
361
362
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
363
364
365
366
367
  {
    return ",";
  }
} commaNode;

368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
//----------------------------------------------------------------------------
static const struct SemicolonNode : public cmGeneratorExpressionNode
{
  SemicolonNode() {}

  virtual int NumExpectedParameters() const { return 0; }

  std::string Evaluate(const std::vector<std::string> &,
                       cmGeneratorExpressionContext *,
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
  {
    return ";";
  }
} semicolonNode;

384
385
386
387
388
//----------------------------------------------------------------------------
struct CompilerIdNode : public cmGeneratorExpressionNode
{
  CompilerIdNode() {}

389
  virtual int NumExpectedParameters() const { return OneOrZeroParameters; }
390
391
392
393
394
395
396
397

  std::string EvaluateWithLanguage(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *context,
                       const GeneratorExpressionContent *content,
                       cmGeneratorExpressionDAGChecker *,
                       const std::string &lang) const
  {
    const char *compilerId = context->Makefile ?
Stephen Kelly's avatar
Stephen Kelly committed
398
399
                              context->Makefile->GetSafeDefinition(
                                      "CMAKE_" + lang + "_COMPILER_ID") : "";
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
    if (parameters.size() == 0)
      {
      return compilerId ? compilerId : "";
      }
    cmsys::RegularExpression compilerIdValidator;
    compilerIdValidator.compile("^[A-Za-z0-9_]*$");
    if (!compilerIdValidator.find(parameters.begin()->c_str()))
      {
      reportError(context, content->GetOriginalExpression(),
                  "Expression syntax not recognized.");
      return std::string();
      }
    if (!compilerId)
      {
      return parameters.front().empty() ? "1" : "0";
      }

417
    if (strcmp(parameters.begin()->c_str(), compilerId) == 0)
418
419
420
      {
      return "1";
      }
421
422
423
424
425
426
427
428
429
430
431
432

    if (cmsysString_strcasecmp(parameters.begin()->c_str(), compilerId) == 0)
      {
      switch(context->Makefile->GetPolicyStatus(cmPolicies::CMP0044))
        {
        case cmPolicies::WARN:
          {
          cmOStringStream e;
          e << context->Makefile->GetPolicies()
                      ->GetPolicyWarning(cmPolicies::CMP0044);
          context->Makefile->GetCMakeInstance()
                 ->IssueMessage(cmake::AUTHOR_WARNING,
Stephen Kelly's avatar
Stephen Kelly committed
433
                                e.str(), context->Backtrace);
434
435
436
437
438
439
440
441
442
          }
        case cmPolicies::OLD:
          return "1";
        case cmPolicies::NEW:
        case cmPolicies::REQUIRED_ALWAYS:
        case cmPolicies::REQUIRED_IF_USED:
          break;
        }
      }
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
    return "0";
  }
};

//----------------------------------------------------------------------------
static const struct CCompilerIdNode : public CompilerIdNode
{
  CCompilerIdNode() {}

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *context,
                       const GeneratorExpressionContent *content,
                       cmGeneratorExpressionDAGChecker *dagChecker) const
  {
    if (!context->HeadTarget)
      {
      reportError(context, content->GetOriginalExpression(),
          "$<C_COMPILER_ID> may only be used with targets.  It may not "
          "be used with add_custom_command.");
462
      return std::string();
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
      }
    return this->EvaluateWithLanguage(parameters, context, content,
                                      dagChecker, "C");
  }
} cCompilerIdNode;

//----------------------------------------------------------------------------
static const struct CXXCompilerIdNode : public CompilerIdNode
{
  CXXCompilerIdNode() {}

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *context,
                       const GeneratorExpressionContent *content,
                       cmGeneratorExpressionDAGChecker *dagChecker) const
  {
    if (!context->HeadTarget)
      {
      reportError(context, content->GetOriginalExpression(),
          "$<CXX_COMPILER_ID> may only be used with targets.  It may not "
          "be used with add_custom_command.");
484
      return std::string();
485
486
487
488
489
490
      }
    return this->EvaluateWithLanguage(parameters, context, content,
                                      dagChecker, "CXX");
  }
} cxxCompilerIdNode;

491
492
493
494
495
//----------------------------------------------------------------------------
struct CompilerVersionNode : public cmGeneratorExpressionNode
{
  CompilerVersionNode() {}

496
  virtual int NumExpectedParameters() const { return OneOrZeroParameters; }
497
498
499
500
501
502
503
504

  std::string EvaluateWithLanguage(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *context,
                       const GeneratorExpressionContent *content,
                       cmGeneratorExpressionDAGChecker *,
                       const std::string &lang) const
  {
    const char *compilerVersion = context->Makefile ?
Stephen Kelly's avatar
Stephen Kelly committed
505
506
                              context->Makefile->GetSafeDefinition(
                                  "CMAKE_" + lang + "_COMPILER_VERSION") : "";
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
    if (parameters.size() == 0)
      {
      return compilerVersion ? compilerVersion : "";
      }

    cmsys::RegularExpression compilerIdValidator;
    compilerIdValidator.compile("^[0-9\\.]*$");
    if (!compilerIdValidator.find(parameters.begin()->c_str()))
      {
      reportError(context, content->GetOriginalExpression(),
                  "Expression syntax not recognized.");
      return std::string();
      }
    if (!compilerVersion)
      {
      return parameters.front().empty() ? "1" : "0";
      }

    return cmSystemTools::VersionCompare(cmSystemTools::OP_EQUAL,
                                      parameters.begin()->c_str(),
                                      compilerVersion) ? "1" : "0";
  }
};

//----------------------------------------------------------------------------
static const struct CCompilerVersionNode : public CompilerVersionNode
{
  CCompilerVersionNode() {}

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *context,
                       const GeneratorExpressionContent *content,
                       cmGeneratorExpressionDAGChecker *dagChecker) const
  {
    if (!context->HeadTarget)
      {
      reportError(context, content->GetOriginalExpression(),
          "$<C_COMPILER_VERSION> may only be used with targets.  It may not "
          "be used with add_custom_command.");
546
      return std::string();
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
      }
    return this->EvaluateWithLanguage(parameters, context, content,
                                      dagChecker, "C");
  }
} cCompilerVersionNode;

//----------------------------------------------------------------------------
static const struct CxxCompilerVersionNode : public CompilerVersionNode
{
  CxxCompilerVersionNode() {}

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *context,
                       const GeneratorExpressionContent *content,
                       cmGeneratorExpressionDAGChecker *dagChecker) const
  {
    if (!context->HeadTarget)
      {
      reportError(context, content->GetOriginalExpression(),
          "$<CXX_COMPILER_VERSION> may only be used with targets.  It may "
          "not be used with add_custom_command.");
568
      return std::string();
569
570
571
572
573
574
575
      }
    return this->EvaluateWithLanguage(parameters, context, content,
                                      dagChecker, "CXX");
  }
} cxxCompilerVersionNode;


576
577
578
579
580
//----------------------------------------------------------------------------
struct PlatformIdNode : public cmGeneratorExpressionNode
{
  PlatformIdNode() {}

581
  virtual int NumExpectedParameters() const { return OneOrZeroParameters; }
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *context,
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
  {
    const char *platformId = context->Makefile ?
                              context->Makefile->GetSafeDefinition(
                        "CMAKE_SYSTEM_NAME") : "";
    if (parameters.size() == 0)
      {
      return platformId ? platformId : "";
      }

    if (!platformId)
      {
      return parameters.front().empty() ? "1" : "0";
      }

601
    if (strcmp(parameters.begin()->c_str(), platformId) == 0)
602
603
604
605
606
607
608
      {
      return "1";
      }
    return "0";
  }
} platformIdNode;

609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
//----------------------------------------------------------------------------
static const struct VersionGreaterNode : public cmGeneratorExpressionNode
{
  VersionGreaterNode() {}

  virtual int NumExpectedParameters() const { return 2; }

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *,
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
  {
    return cmSystemTools::VersionCompare(cmSystemTools::OP_GREATER,
                                         parameters.front().c_str(),
                                         parameters[1].c_str()) ? "1" : "0";
  }
} versionGreaterNode;

//----------------------------------------------------------------------------
static const struct VersionLessNode : public cmGeneratorExpressionNode
{
  VersionLessNode() {}

  virtual int NumExpectedParameters() const { return 2; }

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *,
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
  {
    return cmSystemTools::VersionCompare(cmSystemTools::OP_LESS,
                                         parameters.front().c_str(),
                                         parameters[1].c_str()) ? "1" : "0";
  }
} versionLessNode;

//----------------------------------------------------------------------------
static const struct VersionEqualNode : public cmGeneratorExpressionNode
{
  VersionEqualNode() {}

  virtual int NumExpectedParameters() const { return 2; }

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *,
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
  {
    return cmSystemTools::VersionCompare(cmSystemTools::OP_EQUAL,
                                         parameters.front().c_str(),
                                         parameters[1].c_str()) ? "1" : "0";
  }
} versionEqualNode;

663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
//----------------------------------------------------------------------------
static const struct LinkOnlyNode : public cmGeneratorExpressionNode
{
  LinkOnlyNode() {}

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *,
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *dagChecker) const
  {
    if(!dagChecker->GetTransitivePropertiesOnly())
      {
      return parameters.front();
      }
    return "";
  }
} linkOnlyNode;

681
682
683
684
//----------------------------------------------------------------------------
static const struct ConfigurationNode : public cmGeneratorExpressionNode
{
  ConfigurationNode() {}
685

686
687
688
689
  virtual int NumExpectedParameters() const { return 0; }

  std::string Evaluate(const std::vector<std::string> &,
                       cmGeneratorExpressionContext *context,
690
691
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
692
  {
693
    context->HadContextSensitiveCondition = true;
694
    return context->Config;
695
696
697
698
699
700
701
702
  }
} configurationNode;

//----------------------------------------------------------------------------
static const struct ConfigurationTestNode : public cmGeneratorExpressionNode
{
  ConfigurationTestNode() {}

703
  virtual int NumExpectedParameters() const { return OneOrZeroParameters; }
704
705
706

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *context,
707
708
                       const GeneratorExpressionContent *content,
                       cmGeneratorExpressionDAGChecker *) const
709
  {
710
711
712
713
    if (parameters.empty())
      {
      return configurationNode.Evaluate(parameters, context, content, 0);
      }
714
715
716
717
718
719
720
721
    cmsys::RegularExpression configValidator;
    configValidator.compile("^[A-Za-z0-9_]*$");
    if (!configValidator.find(parameters.begin()->c_str()))
      {
      reportError(context, content->GetOriginalExpression(),
                  "Expression syntax not recognized.");
      return std::string();
      }
722
    context->HadContextSensitiveCondition = true;
723
    if (context->Config.empty())
724
725
726
727
      {
      return parameters.front().empty() ? "1" : "0";
      }

728
    if (cmsysString_strcasecmp(parameters.begin()->c_str(),
729
                               context->Config.c_str()) == 0)
730
731
732
733
734
735
736
737
738
739
      {
      return "1";
      }

    if (context->CurrentTarget
        && context->CurrentTarget->IsImported())
      {
      const char* loc = 0;
      const char* imp = 0;
      std::string suffix;
740
      if (context->CurrentTarget->GetMappedConfig(context->Config,
741
742
                                                  &loc,
                                                  &imp,
743
744
745
746
747
748
749
                                                  suffix))
        {
        // This imported target has an appropriate location
        // for this (possibly mapped) config.
        // Check if there is a proper config mapping for the tested config.
        std::vector<std::string> mappedConfigs;
        std::string mapProp = "MAP_IMPORTED_CONFIG_";
750
        mapProp += cmSystemTools::UpperCase(context->Config);
751
        if(const char* mapValue =
Stephen Kelly's avatar
Stephen Kelly committed
752
                        context->CurrentTarget->GetProperty(mapProp))
753
754
755
756
          {
          cmSystemTools::ExpandListArgument(cmSystemTools::UpperCase(mapValue),
                                            mappedConfigs);
          return std::find(mappedConfigs.begin(), mappedConfigs.end(),
757
758
                           cmSystemTools::UpperCase(parameters.front()))
              != mappedConfigs.end() ? "1" : "0";
759
760
          }
        }
761
762
      }
    return "0";
763
764
765
  }
} configurationTestNode;

766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
static const struct JoinNode : public cmGeneratorExpressionNode
{
  JoinNode() {}

  virtual int NumExpectedParameters() const { return 2; }

  virtual bool AcceptsArbitraryContentParameter() const { return true; }

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *,
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
  {
    std::string result;

    std::vector<std::string> list;
    cmSystemTools::ExpandListArgument(parameters.front(), list);
    std::string sep;
    for(std::vector<std::string>::const_iterator li = list.begin();
      li != list.end(); ++li)
      {
      result += sep + *li;
      sep = parameters[1];
      }
    return result;
  }
} joinNode;

794
#define TRANSITIVE_PROPERTY_NAME(PROPERTY) \
795
  , "INTERFACE_" #PROPERTY
796

797
798
//----------------------------------------------------------------------------
static const char* targetPropertyTransitiveWhitelist[] = {
799
800
  0
  CM_FOR_EACH_TRANSITIVE_PROPERTY_NAME(TRANSITIVE_PROPERTY_NAME)
801
802
};

803
804
#undef TRANSITIVE_PROPERTY_NAME

805
std::string getLinkedTargetsContent(const std::vector<cmTarget*> &targets,
806
807
                                  cmTarget const* target,
                                  cmTarget const* headTarget,
808
809
810
811
812
813
814
815
                                  cmGeneratorExpressionContext *context,
                                  cmGeneratorExpressionDAGChecker *dagChecker,
                                  const std::string &interfacePropertyName)
{
  cmGeneratorExpression ge(context->Backtrace);

  std::string sep;
  std::string depString;
816
817
818
  for (std::vector<cmTarget*>::const_iterator
      it = targets.begin();
      it != targets.end(); ++it)
819
    {
820
    if (*it == target)
821
822
823
824
825
826
      {
      // Broken code can have a target in its own link interface.
      // Don't follow such link interface entries so as not to create a
      // self-referencing loop.
      continue;
      }
827
828
829
830
    depString +=
      sep + "$<TARGET_PROPERTY:" +
        (*it)->GetName() + "," + interfacePropertyName + ">";
    sep = ";";
831
832
833
834
835
    }
  cmsys::auto_ptr<cmCompiledGeneratorExpression> cge = ge.Parse(depString);
  std::string linkedTargetsContent = cge->Evaluate(context->Makefile,
                      context->Config,
                      context->Quiet,
836
                      headTarget,
837
838
839
840
841
842
843
844
845
                      target,
                      dagChecker);
  if (cge->GetHadContextSensitiveCondition())
    {
    context->HadContextSensitiveCondition = true;
    }
  return linkedTargetsContent;
}

846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
std::string getLinkedTargetsContent(const std::vector<std::string> &libraries,
                                  cmTarget const* target,
                                  cmTarget const* headTarget,
                                  cmGeneratorExpressionContext *context,
                                  cmGeneratorExpressionDAGChecker *dagChecker,
                                  const std::string &interfacePropertyName)
{
  std::vector<cmTarget*> tgts;
  for (std::vector<std::string>::const_iterator
      it = libraries.begin();
      it != libraries.end(); ++it)
    {
    if (cmTarget *tgt = context->Makefile->FindTargetToUse(*it))
      {
      tgts.push_back(tgt);
      }
    }
  return getLinkedTargetsContent(tgts, target, headTarget, context,
                                 dagChecker, interfacePropertyName);
}

867
//----------------------------------------------------------------------------
868
static const struct TargetPropertyNode : public cmGeneratorExpressionNode
869
870
871
872
{
  TargetPropertyNode() {}

  // This node handles errors on parameter count itself.
873
  virtual int NumExpectedParameters() const { return OneOrMoreParameters; }
874
875
876

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *context,
877
                       const GeneratorExpressionContent *content,
878
879
                       cmGeneratorExpressionDAGChecker *dagCheckerParent
                      ) const
880
881
882
883
884
885
886
  {
    if (parameters.size() != 1 && parameters.size() != 2)
      {
      reportError(context, content->GetOriginalExpression(),
          "$<TARGET_PROPERTY:...> expression requires one or two parameters");
      return std::string();
      }
887
888
    cmsys::RegularExpression propertyNameValidator;
    propertyNameValidator.compile("^[A-Za-z0-9_]+$");
889

890
    cmTarget const* target = context->HeadTarget;
891
    std::string propertyName = *parameters.begin();
892
893
894
895
896
897
898
899
900
901
902

    if (!target && parameters.size() == 1)
      {
      reportError(context, content->GetOriginalExpression(),
          "$<TARGET_PROPERTY:prop> may only be used with targets.  It may not "
          "be used with add_custom_command.  Specify the target to read a "
          "property from using the $<TARGET_PROPERTY:tgt,prop> signature "
          "instead.");
      return std::string();
      }

903
904
    if (parameters.size() == 2)
      {
905
      if (parameters.begin()->empty() && parameters[1].empty())
906
907
908
909
910
911
912
913
914
915
916
917
918
919
        {
        reportError(context, content->GetOriginalExpression(),
            "$<TARGET_PROPERTY:tgt,prop> expression requires a non-empty "
            "target name and property name.");
        return std::string();
        }
      if (parameters.begin()->empty())
        {
        reportError(context, content->GetOriginalExpression(),
            "$<TARGET_PROPERTY:tgt,prop> expression requires a non-empty "
            "target name.");
        return std::string();
        }

920
      std::string targetName = parameters.front();
921
      propertyName = parameters[1];
922
      if (!cmGeneratorExpression::IsValidTargetName(targetName))
923
        {
924
        if (!propertyNameValidator.find(propertyName.c_str()))
925
926
927
928
929
930
931
932
933
          {
          ::reportError(context, content->GetOriginalExpression(),
                        "Target name and property name not supported.");
          return std::string();
          }
        ::reportError(context, content->GetOriginalExpression(),
                      "Target name not supported.");
        return std::string();
        }
934
935
      if(propertyName == "ALIASED_TARGET")
        {
936
        if(context->Makefile->IsAlias(targetName))
937
          {
938
          if(cmTarget* tgt = context->Makefile->FindTargetToUse(targetName))
939
940
941
942
943
944
            {
            return tgt->GetName();
            }
          }
        return "";
        }
945
      target = context->Makefile->FindTargetToUse(targetName);
946
947
948
949
950

      if (!target)
        {
        cmOStringStream e;
        e << "Target \""
951
          << targetName
952
953
          << "\" not found.";
        reportError(context, content->GetOriginalExpression(), e.str());
954
        return std::string();
955
        }
956
        context->AllTargets.insert(target);
957
958
      }

959
960
961
962
    if (target == context->HeadTarget)
      {
      // Keep track of the properties seen while processing.
      // The evaluation of the LINK_LIBRARIES generator expressions
963
964
      // will check this to ensure that properties have one consistent
      // value for all evaluations.
965
966
967
      context->SeenTargetProperties.insert(propertyName);
      }

968
969
970
971
972
973
974
975
    if (propertyName.empty())
      {
      reportError(context, content->GetOriginalExpression(),
          "$<TARGET_PROPERTY:...> expression requires a non-empty property "
          "name.");
      return std::string();
      }

976
    if (!propertyNameValidator.find(propertyName.c_str()))
977
978
979
980
      {
      ::reportError(context, content->GetOriginalExpression(),
                    "Property name not supported.");
      return std::string();
981
      }
982

983
984
    assert(target);

985
986
    if (propertyName == "LINKER_LANGUAGE")
      {
987
      if (target->LinkLanguagePropagatesToDependents() &&
988
989
          dagCheckerParent && (dagCheckerParent->EvaluatingLinkLibraries()
            || dagCheckerParent->EvaluatingSources()))
990
991
992
        {
        reportError(context, content->GetOriginalExpression(),
            "LINKER_LANGUAGE target property can not be used while evaluating "
993
            "link libraries for a static library");
994
995
        return std::string();
        }
996
      return target->GetLinkerLanguage(context->Config);
997
998
      }

999
1000
1001
1002
1003
1004
    cmGeneratorExpressionDAGChecker dagChecker(context->Backtrace,
                                               target->GetName(),
                                               propertyName,
                                               content,
                                               dagCheckerParent);

1005
    switch (dagChecker.Check())
1006
      {
1007
    case cmGeneratorExpressionDAGChecker::SELF_REFERENCE:
1008
      dagChecker.ReportError(context, content->GetOriginalExpression());
1009
      return std::string();
1010
1011
1012
    case cmGeneratorExpressionDAGChecker::CYCLIC_REFERENCE:
      // No error. We just skip cyclic references.
      return std::string();
1013
    case cmGeneratorExpressionDAGChecker::ALREADY_SEEN:
1014
      for (size_t i = 1;
1015
          i < cmArraySize(targetPropertyTransitiveWhitelist);
1016
1017
1018
1019
1020
1021
1022
1023
          ++i)
        {
        if (targetPropertyTransitiveWhitelist[i] == propertyName)
          {
          // No error. We're not going to find anything new here.
          return std::string();
          }
        }
1024
1025
    case cmGeneratorExpressionDAGChecker::DAG:
      break;
1026
1027
      }

Stephen Kelly's avatar
Stephen Kelly committed
1028
    const char *prop = target->GetProperty(propertyName);
1029
1030

    if (dagCheckerParent)
1031
      {
1032
      if (dagCheckerParent->EvaluatingLinkLibraries())
1033
        {
1034
1035
1036
1037
        if(!prop)
          {
          return std::string();
          }
1038
        }
1039
      else
1040
        {
1041
1042
1043
1044
1045
1046
1047
#define ASSERT_TRANSITIVE_PROPERTY_METHOD(METHOD) \
  dagCheckerParent->METHOD () ||

        assert(
          CM_FOR_EACH_TRANSITIVE_PROPERTY_METHOD(
                                            ASSERT_TRANSITIVE_PROPERTY_METHOD)
          false);
1048
        }
1049
#undef ASSERT_TRANSITIVE_PROPERTY_METHOD
1050
1051
1052
1053
1054
      }

    std::string linkedTargetsContent;

    std::string interfacePropertyName;
1055

1056
1057
1058
1059
1060
1061
1062
1063
1064
#define POPULATE_INTERFACE_PROPERTY_NAME(prop) \
    if (propertyName == #prop || propertyName == "INTERFACE_" #prop) \
      { \
      interfacePropertyName = "INTERFACE_" #prop; \
      } \
    else

    CM_FOR_EACH_TRANSITIVE_PROPERTY_NAME(POPULATE_INTERFACE_PROPERTY_NAME)
      // Note that the above macro terminates with an else
1065
1066
    /* else */ if (cmHasLiteralPrefix(propertyName.c_str(),
                           "COMPILE_DEFINITIONS_"))
1067
      {
1068
1069
1070
1071
1072
1073
      cmPolicies::PolicyStatus polSt =
                      context->Makefile->GetPolicyStatus(cmPolicies::CMP0043);
      if (polSt == cmPolicies::WARN || polSt == cmPolicies::OLD)
        {
        interfacePropertyName = "INTERFACE_COMPILE_DEFINITIONS";
        }
1074
      }
1075
#undef POPULATE_INTERFACE_PROPERTY_NAME
1076

1077
1078
    cmTarget const* headTarget = context->HeadTarget
                               ? context->HeadTarget : target;
1079

1080
1081
1082
1083
1084
    const char * const *transBegin =
                        cmArrayBegin(targetPropertyTransitiveWhitelist) + 1;
    const char * const *transEnd =
                        cmArrayEnd(targetPropertyTransitiveWhitelist);

1085
    if (std::find_if(transBegin, transEnd,
1086
                     cmStrCmp(propertyName)) != transEnd)
1087
      {
1088

1089
1090
1091
1092
      std::vector<cmTarget*> tgts;
      target->GetTransitivePropertyTargets(context->Config,
                                                 headTarget, tgts);
      if (!tgts.empty())
1093
        {
1094
        linkedTargetsContent =
1095
                  getLinkedTargetsContent(tgts, target,
1096
                                          headTarget,
1097
1098
                                          context, &dagChecker,
                                          interfacePropertyName);
1099
1100
        }
      }
1101
    else if (std::find_if(transBegin, transEnd,
1102
                          cmStrCmp(interfacePropertyName)) != transEnd)
1103
      {
1104
1105
1106
      const cmTarget::LinkImplementation *impl
          = target->GetLinkImplementationLibraries(context->Config,
                                                   headTarget);
1107
1108
1109
1110
      if(impl)
        {
        linkedTargetsContent =
                  getLinkedTargetsContent(impl->Libraries, target,
1111
                                          headTarget,
1112
1113
                                          context, &dagChecker,
                                          interfacePropertyName);
1114
1115
1116
        }
      }

1117
1118
1119
    linkedTargetsContent =
          cmGeneratorExpression::StripEmptyListElements(linkedTargetsContent);

1120
1121
    if (!prop)
      {
1122
1123
      if (target->IsImported()
          || target->GetType() == cmTarget::INTERFACE_LIBRARY)
1124
1125
        {
        return linkedTargetsContent;
1126
1127
1128
1129
        }
      if (target->IsLinkInterfaceDependentBoolProperty(propertyName,
                                                       context->Config))
        {
1130
        context->HadContextSensitiveCondition = true;
1131
1132
1133
1134
        return target->GetLinkInterfaceDependentBoolProperty(
                                                propertyName,
                                                context->Config) ? "1" : "0";
        }
1135
1136
1137
      if (target->IsLinkInterfaceDependentStringProperty(propertyName,
                                                         context->Config))
        {
1138
        context->HadContextSensitiveCondition = true;
1139
1140
        const char *propContent =
                              target->GetLinkInterfaceDependentStringProperty(
1141
1142
                                                propertyName,
                                                context->Config);
1143
        return propContent ? propContent : "";
1144
        }
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
      if (target->IsLinkInterfaceDependentNumberMinProperty(propertyName,
                                                         context->Config))
        {
        context->HadContextSensitiveCondition = true;
        const char *propContent =
                          target->GetLinkInterfaceDependentNumberMinProperty(
                                                propertyName,
                                                context->Config);
        return propContent ? propContent : "";
        }
      if (target->IsLinkInterfaceDependentNumberMaxProperty(propertyName,
                                                         context->Config))
        {
        context->HadContextSensitiveCondition = true;
        const char *propContent =
                          target->GetLinkInterfaceDependentNumberMaxProperty(
                                                propertyName,
                                                context->Config);
        return propContent ? propContent : "";
        }
1165

1166
      return linkedTargetsContent;
1167
1168
      }

1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
    if (!target->IsImported()
        && dagCheckerParent && !dagCheckerParent->EvaluatingLinkLibraries())
      {
      if (target->IsLinkInterfaceDependentNumberMinProperty(propertyName,
                                                        context->Config))
        {
        context->HadContextSensitiveCondition = true;
        const char *propContent =
                            target->GetLinkInterfaceDependentNumberMinProperty(
                                                propertyName,
                                                context->Config);
        return propContent ? propContent : "";
        }
      if (target->IsLinkInterfaceDependentNumberMaxProperty(propertyName,
                                                        context->Config))
        {
        context->HadContextSensitiveCondition = true;
        const char *propContent =
                            target->GetLinkInterfaceDependentNumberMaxProperty(
                                                propertyName,
                                                context->Config);
        return propContent ? propContent : "";
        }
      }
1193
    for (size_t i = 1;
1194
         i < cmArraySize(targetPropertyTransitiveWhitelist);
1195
1196
         ++i)
      {
1197
      if (targetPropertyTransitiveWhitelist[i] == interfacePropertyName)
1198
1199
        {
        cmGeneratorExpression ge(context->Backtrace);
1200
1201
        cmsys::auto_ptr<cmCompiledGeneratorExpression> cge = ge.Parse(prop);
        std::string result = cge->Evaluate(context->Makefile,
1202
1203
                            context->Config,
                            context->Quiet,
1204
                            headTarget,
1205
1206
                            target,
                            &dagChecker);
1207
1208
1209
1210
1211

        if (cge->GetHadContextSensitiveCondition())
          {
          context->HadContextSensitiveCondition = true;
          }
1212
1213
1214
1215
        if (!linkedTargetsContent.empty())
          {
          result += (result.empty() ? "" : ";") + linkedTargetsContent;
          }
1216
        return result;
1217
1218
1219
        }
      }
    return prop;
1220
1221
1222
  }
} targetPropertyNode;

1223
1224
1225
1226
1227
1228
1229
//----------------------------------------------------------------------------
static const struct TargetNameNode : public cmGeneratorExpressionNode
{
  TargetNameNode() {}

  virtual bool GeneratesContent() const { return true; }

1230
  virtual bool AcceptsArbitraryContentParameter() const { return true; }
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
  virtual bool RequiresLiteralInput() const { return true; }

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *,
                       const GeneratorExpressionContent *,
                       cmGeneratorExpressionDAGChecker *) const
  {
    return parameters.front();
  }

  virtual int NumExpectedParameters() const { return 1; }

} targetNameNode;

1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
//----------------------------------------------------------------------------
static const struct TargetObjectsNode : public cmGeneratorExpressionNode
{
  TargetObjectsNode() {}

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *context,
                       const GeneratorExpressionContent *content,
                       cmGeneratorExpressionDAGChecker *) const
  {
    std::string tgtName = parameters.front();
    cmGeneratorTarget* gt =
                context->Makefile->FindGeneratorTargetToUse(tgtName.c_str());
    if (!gt)
      {
      cmOStringStream e;
      e << "Objects of target \"" << tgtName
        << "\" referenced but no such target exists.";
      reportError(context, content->GetOriginalExpression(), e.str());
      return std::string();
      }
    if (gt->GetType() != cmTarget::OBJECT_LIBRARY)
      {
      cmOStringStream e;
      e << "Objects of target \"" << tgtName
        << "\" referenced but is not an OBJECT library.";
      reportError(context, content->GetOriginalExpression(), e.str());
      return std::string();
      }

    std::vector<cmSourceFile const*> objectSources;
1276
    gt->GetObjectSources(objectSources, context->Config);
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
    std::map<cmSourceFile const*, std::string> mapping;

    for(std::vector<cmSourceFile const*>::const_iterator it
        = objectSources.begin(); it != objectSources.end(); ++it)
      {
      mapping[*it];
      }

    gt->LocalGenerator->ComputeObjectFilenames(mapping, gt);

    std::string obj_dir = gt->ObjectDirectory;
    std::string result;
    const char* sep = "";
    for(std::map<cmSourceFile const*, std::string>::const_iterator it
        = mapping.begin(); it != mapping.end(); ++it)
      {
      assert(!it->second.empty());
      result += sep;
      std::string objFile = obj_dir + it->second;
      cmSourceFile* sf = context->Makefile->GetOrCreateSource(objFile, true);
      sf->SetObjectLibrary(tgtName);
      sf->SetProperty("EXTERNAL_OBJECT", "1");
      result += objFile;
      sep = ";";
      }
    return result;
  }
} targetObjectsNode;

1306
1307
//----------------------------------------------------------------------------
static const char* targetPolicyWhitelist[] = {
1308
1309
1310
1311
1312
1313
1314
  0
#define TARGET_POLICY_STRING(POLICY) \
  , #POLICY

  CM_FOR_EACH_TARGET_POLICY(TARGET_POLICY_STRING)

#undef TARGET_POLICY_STRING
1315
1316
};

1317
1318
cmPolicies::PolicyStatus statusForTarget(cmTarget const* tgt,
                                         const char *policy)
1319
1320
1321
1322
1323
1324
1325
{
#define RETURN_POLICY(POLICY) \
  if (strcmp(policy, #POLICY) == 0) \
  { \
    return tgt->GetPolicyStatus ## POLICY (); \
  } \

1326
  CM_FOR_EACH_TARGET_POLICY(RETURN_POLICY)
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341

#undef RETURN_POLICY

  assert("!Unreachable code. Not a valid policy");
  return cmPolicies::WARN;
}

cmPolicies::PolicyID policyForString(const char *policy_id)
{
#define RETURN_POLICY_ID(POLICY_ID) \
  if (strcmp(policy_id, #POLICY_ID) == 0) \
  { \
    return cmPolicies:: POLICY_ID; \
  } \

1342
  CM_FOR_EACH_TARGET_POLICY(RETURN_POLICY_ID)
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368

#undef RETURN_POLICY_ID

  assert("!Unreachable code. Not a valid policy");
  return cmPolicies::CMP0002;
}

//----------------------------------------------------------------------------
static const struct TargetPolicyNode : public cmGeneratorExpressionNode
{
  TargetPolicyNode() {}

  virtual int NumExpectedParameters() const { return 1; }

  std::string Evaluate(const std::vector<std::string> &parameters,
                       cmGeneratorExpressionContext *context ,
                       const GeneratorExpressionContent *content,
                       cmGeneratorExpressionDAGChecker *) const
  {
    if (!context->HeadTarget)
      {
      reportError(context, content->GetOriginalExpression(),
          "$<TARGET_POLICY:prop> may only be used with targets.  It may not "
          "be used with add_custom_command.");
      return std::string();
      }
1369
1370
1371

    context->HadContextSensitiveCondition = true;

1372
    for (size_t i = 1; i < cmArraySize(targetPolicyWhitelist); ++i)
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
      {
      const char *policy = targetPolicyWhitelist[i];
      if (parameters.front() == policy)
        {
        cmMakefile *mf = context->HeadTarget->GetMakefile();
        switch(statusForTarget(context->HeadTarget, policy))
          {
          case cmPolicies::WARN:
            mf->IssueMessage(cmake::AUTHOR_WARNING,
                             mf->GetPolicies()->
                             GetPolicyWarning(policyForString(policy)));
          case cmPolicies::REQUIRED_IF_USED:
          case cmPolicies::REQUIRED_ALWAYS:
          case cmPolicies::OLD:
            return "0";
          case cmPolicies::NEW:
            return "1";
          }
        }
      }
    reportError(context, content->GetOriginalExpression(),
      "$<TARGET_POLICY:prop> may only be used with a limited number of "
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
      "policies.  Currently it may be used with the following policies:\n"

#define STRINGIFY_HELPER(X) #X
#define STRINGIFY(X) STRINGIFY_HELPER(X)

#define TARGET_POLICY_LIST_ITEM(POLICY) \
      " * " STRINGIFY(POLICY) "\n"

      CM_FOR_EACH_TARGET_POLICY(TARGET_POLICY_LIST_ITEM)

#undef TARGET_POLICY_LIST_ITEM
1406
1407
1408
1409
1410
1411
      );
    return std::string();
  }

} targetPolicyNode;

Stephen Kelly's avatar
Stephen Kelly committed
1412
1413
1414
1415
1416
//----------------------------------------------------------------------------
static const struct InstallPrefixNode : public cmGeneratorExpressionNode
{
  InstallPrefixNode() {}

1417
  virtual bool GeneratesContent() const { return true; }
Stephen Kelly's avatar
Stephen Kelly committed
1418
1419
1420
  virtual int NumExpectedParameters() const { return 0; }

  std::string Evaluate(const std::vector<std::string> &,
1421
1422
                       cmGeneratorExpressionContext *context,
                       const GeneratorExpressionContent *content,
Stephen Kelly's avatar
Stephen Kelly committed
1423
1424
                       cmGeneratorExpressionDAGChecker *) const
  {
1425
1426
1427
    reportError(context, content->GetOriginalExpression(),
                "INSTALL_PREFIX is a marker for install(EXPORT) only.  It "
                "should never be evaluated.");
Stephen Kelly's avatar
Stephen Kelly committed
1428