1

/*

     2

 *  matiec - a compiler for the programming languages defined in IEC 61131-3

     3

 *

     4

 *  Copyright (C) 2009-2011  Mario de Sousa (msousa@fe.up.pt)

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 *  Copyright (C) 2011-2012 Manuele Conti (manuele.conti@sirius-es.it)

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 *  Copyright (C) 2011-2012 Matteo Facchinetti (matteo.facchinetti@sirius-es.it)

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 *

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 *  This program is free software: you can redistribute it and/or modify

     9

 *  it under the terms of the GNU General Public License as published by

    10

 *  the Free Software Foundation, either version 3 of the License, or

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 *  (at your option) any later version.

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 *

    13

 *  This program is distributed in the hope that it will be useful,

    14

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

    15

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 *  GNU General Public License for more details.

    17

 *

    18

 *  You should have received a copy of the GNU General Public License

    19

 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.

    20

 *

    21

 *

    22

 * This code is made available on the understanding that it will not be

    23

 * used in safety-critical situations without a full and competent review.

    24

 */

    25

    26

/*

    27

 * An IEC 61131-3 compiler.

    28

 *

    29

 * Based on the

    30

 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)

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 *

    32

 */

    33

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/* NOTE: The algorithm implemented here assumes that the symbol_c.candidate_datatype, and the symbol_c.datatype 

    35

 *       annotations have already been apropriately filled in!

    36

 *       BEFORE running this visitor, be sure to CALL the fill_candidate_datatypes_c, and the narrow_candidate_datatypes_c visitors!

    37

 */

    38

    39

    40

/*

    41

 *  By analysing the candidate datatype lists, as well as the chosen datatype for each expression, determine

    42

 *  if an datatype error has been found, and if so, print out an error message.

    43

 */

    44

    45

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#include "print_datatypes_error.hh"

    47

#include "datatype_functions.hh"

    48

    49

#include <typeinfo>

    50

#include <list>

    51

#include <string>

    52

#include <string.h>

    53

#include <strings.h>

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    55

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    57

    58

    59

    60

#define FIRST_(symbol1, symbol2) (((symbol1)->first_order < (symbol2)->first_order)   ? (symbol1) : (symbol2))

    61

#define  LAST_(symbol1, symbol2) (((symbol1)->last_order  > (symbol2)->last_order)    ? (symbol1) : (symbol2))

    62

    63

#define STAGE3_ERROR(error_level, symbol1, symbol2, ...) {                                                                  \

    64

  if (current_display_error_level >= error_level) {                                                                         \

    65

    fprintf(stderr, "%s:%d-%d..%d-%d: error: ",                                                                             \

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            FIRST_(symbol1,symbol2)->first_file, FIRST_(symbol1,symbol2)->first_line, FIRST_(symbol1,symbol2)->first_column,\

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                                                 LAST_(symbol1,symbol2) ->last_line,  LAST_(symbol1,symbol2) ->last_column);\

    68

    fprintf(stderr, __VA_ARGS__);                                                                                           \

    69

    fprintf(stderr, "\n");                                                                                                  \

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    il_error = true;                                                                                                        \

    71

    error_count++;                                                                                                     \

    72

  }                                                                                                                         \

    73

}  

    74

    75

    76

#define STAGE3_WARNING(symbol1, symbol2, ...) {                                                                             \

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    fprintf(stderr, "%s:%d-%d..%d-%d: warning: ",                                                                           \

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            FIRST_(symbol1,symbol2)->first_file, FIRST_(symbol1,symbol2)->first_line, FIRST_(symbol1,symbol2)->first_column,\

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                                                 LAST_(symbol1,symbol2) ->last_line,  LAST_(symbol1,symbol2) ->last_column);\

    80

    fprintf(stderr, __VA_ARGS__);                                                                                           \

    81

    fprintf(stderr, "\n");                                                                                                  \

    82

    warning_found = true;                                                                                                   \

    83

}  

    84

    85

    86

/* set to 1 to see debug info during execution */

    87

static int debug = 0;

    88

    89

print_datatypes_error_c::print_datatypes_error_c(symbol_c *ignore) {

    90

	error_count = 0;

    91

	warning_found = false;

    92

	current_display_error_level = error_level_default;

    93

}

    94

    95

print_datatypes_error_c::~print_datatypes_error_c(void) {

    96

}

    97

    98

int print_datatypes_error_c::get_error_count() {

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	return error_count;

   100

}

   101

   102

   103

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   105

   113

	return res;

   114

}

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   116

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   118

   119

/* a helper function... */

   120

symbol_c *print_datatypes_error_c::base_type(symbol_c *symbol) {

   121

	/* NOTE: symbol == NULL is valid. It will occur when, for e.g., an undefined/undeclared symbolic_variable is used

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	 *       in the code.

   123

	 */

   124

	if (symbol == NULL) return NULL;

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	return (symbol_c *)symbol->accept(search_base_type);

   126

}

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   130

/*

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typedef struct {

   132

  symbol_c *function_name,

   133

  symbol_c *nonformal_operand_list,

   134

  symbol_c *   formal_operand_list,

   135

   136

  std::vector <symbol_c *> &candidate_functions,  

   137

  symbol_c &*called_function_declaration,

   138

  int      &extensible_param_count

   139

} generic_function_call_t;

   140

*/

   141

void print_datatypes_error_c::handle_function_invocation(symbol_c *fcall, generic_function_call_t fcall_data) {

   142

	symbol_c *param_value, *param_name;

   143

	function_call_param_iterator_c fcp_iterator(fcall);

   144

	bool function_invocation_error = false;

   145

	const char *POU_str = NULL;

   146

   147

	if (generic_function_call_t::POU_FB       == fcall_data.POU_type)  POU_str = "FB";

   148

	if (generic_function_call_t::POU_function == fcall_data.POU_type)  POU_str = "function";

   149

	if (NULL == POU_str) ERROR;

   150

   151

	if ((NULL != fcall_data.formal_operand_list) && (NULL != fcall_data.nonformal_operand_list)) 

   152

		ERROR;

   153

   154

	symbol_c *f_decl = fcall_data.called_function_declaration;

   155

	if ((NULL == f_decl) && (generic_function_call_t::POU_FB ==fcall_data.POU_type)) {

   156

		/* Due to the way the syntax analysis is buit (i.e. stage 2), this should never occur. */

   157

		/* I.e., a FB invocation using an undefined FB variable is not possible in the current implementation of stage 2. */

   158

		ERROR;

   159

	}

   160

	if (NULL == f_decl) {

   161

		/* we now try to find any function declaration with the same name, just so we can provide some relevant error messages */

   162

		function_symtable_t::iterator lower = function_symtable.lower_bound(fcall_data.function_name);

   163

		if (lower == function_symtable.end()) ERROR;

   164

		f_decl = function_symtable.get_value(lower);

   165

	}

   166

   167

	if (NULL != fcall_data.formal_operand_list) {

   168

		fcall_data.formal_operand_list->accept(*this);

   169

		if (NULL != f_decl) {

   170

			function_param_iterator_c fp_iterator(f_decl);

   171

			while ((param_name = fcp_iterator.next_f()) != NULL) {

   172

				param_value = fcp_iterator.get_current_value();

   173

   174

				/* Check if there are duplicate parameter values */

   175

				if(fcp_iterator.search_f(param_name) != param_value) {

   176

					function_invocation_error = true;

   177

					STAGE3_ERROR(0, param_name, param_name, "Duplicate parameter '%s' when invoking %s '%s'", ((identifier_c *)param_name)->value, POU_str, ((identifier_c *)fcall_data.function_name)->value);

   178

					continue; /* jump to next parameter */

   179

				}

   180

   181

				/* Find the corresponding parameter in function declaration */

   182

				if (NULL == fp_iterator.search(param_name)) {

   183

					function_invocation_error = true;

   184

					STAGE3_ERROR(0, param_name, param_name, "Invalid parameter '%s' when invoking %s '%s'", ((identifier_c *)param_name)->value, POU_str, ((identifier_c *)fcall_data.function_name)->value);

   185

					continue; /* jump to next parameter */

   186

				} 

   187

   188

				/* check whether direction (IN, OUT, IN_OUT) and assignment types (:= , =>) are compatible !!! */

   189

				/* Obtaining the assignment direction:  := (assign_in) or => (assign_out) */

   190

				function_call_param_iterator_c::assign_direction_t call_param_dir = fcp_iterator.get_assign_direction();

   191

				/* Get the parameter direction: IN, OUT, IN_OUT */

   192

				function_param_iterator_c::param_direction_t param_dir = fp_iterator.param_direction();

   193

				if          (function_call_param_iterator_c::assign_in  == call_param_dir) {

   194

					if ((function_param_iterator_c::direction_in    != param_dir) &&

   195

					    (function_param_iterator_c::direction_inout != param_dir)) {

   196

						function_invocation_error = true;

   197

						STAGE3_ERROR(0, param_name, param_name, "Invalid assignment syntax ':=' used for parameter '%s', when invoking %s '%s'", ((identifier_c *)param_name)->value, POU_str, ((identifier_c *)fcall_data.function_name)->value);

   198

						continue; /* jump to next parameter */

   199

					}

   200

				} else if   (function_call_param_iterator_c::assign_out == call_param_dir) {

   201

					if ((function_param_iterator_c::direction_out   != param_dir)) {

   202

						function_invocation_error = true;

   203

						STAGE3_ERROR(0, param_name, param_name, "Invalid assignment syntax '=>' used for parameter '%s', when invoking %s '%s'", ((identifier_c *)param_name)->value, POU_str, ((identifier_c *)fcall_data.function_name)->value);

   204

						continue; /* jump to next parameter */

   205

					}

   206

				} else ERROR;

   207

   208

				if (NULL == param_value->datatype) {

   209

					function_invocation_error = true;

   210

					STAGE3_ERROR(0, param_value, param_value, "Data type incompatibility between parameter '%s' and value being passed, when invoking %s '%s'", ((identifier_c *)param_name)->value, POU_str, ((identifier_c *)fcall_data.function_name)->value);

   211

					continue; /* jump to next parameter */

   212

				}

   213

			}

   214

		}

   215

	}

   216

	if (NULL != fcall_data.nonformal_operand_list) {

   217

		fcall_data.nonformal_operand_list->accept(*this);

   218

		if (f_decl)

   219

			for (int i = 1; (param_value = fcp_iterator.next_nf()) != NULL; i++) {

   220

		  		/* TODO: verify if it is lvalue when INOUT or OUTPUT parameters! */

   221

   222

				/* This handle_function_invocation() will be called to handle IL function calls, where the first parameter comes from the previous IL instruction.

   223

				 * In this case, the previous IL instruction will be artifically (and temporarily) added to the begining ot the parameter list

   224

				 * so we (in this function) can handle this situation like all the other function calls.

   225

				 * However, 

   226

				 *     a) if NO previous IL function exists, then we get a fake previous IL function, with no location data (i.e. not found anywhere in the source code.

   227

				 *     b) the function call may actually have several prev IL instructions (if several JMP instructions jump directly to the il function call).

   228

				 * In order to handle these situations gracefully, we first check whether the first parameter is really an IL istruction!

   229

				 */

   230

				il_instruction_c *il_instruction_symbol = dynamic_cast<il_instruction_c *>(param_value);

   231

				if ((NULL != il_instruction_symbol) && (i == 1)) {

   232

					/* We are in a situation where an IL function call is passed the first parameter, which is actually the previous IL instruction */

   233

					/* However, this is really a fake previous il instruction (see visit(il_instruction_c *) )

   234

					 * We will iterate through all the real previous IL instructions, and analyse each of them one by one */

   235

					if (il_instruction_symbol->prev_il_instruction.size() == 0) {

   236

						function_invocation_error = true;

   237

						STAGE3_ERROR(0, fcall, fcall, "No available data to pass to first parameter of IL function %s. Missing a previous LD instruction?", ((identifier_c *)fcall_data.function_name)->value);

   238

					}

   239

#if 0

   240

					/* NOTE: We currently comment out this code...

   241

					 * This does not currently work, since the narrow operation is currently done on the intersection 

   242

					 * of all the previous IL instructions, so we currently either accept them all, or none at all.

   243

					 * In order to be able to produce these user freindly error messages, we will need to update the 

   244

					 * narrow algorithm. We leave this untill somebody aks for it...

   245

					 * So, for now, we simply comment out this code.

   246

					 */

   247

					for (unsigned int p = 0; p < il_instruction_symbol->prev_il_instruction.size(); p++) {

   248

						symbol_c *value = il_instruction_symbol->prev_il_instruction[p];  

   249

						if (!get_datatype_info_c::is_type_valid(value->datatype)) {

   250

							function_invocation_error = true;

   251

							STAGE3_ERROR(0, fcall, fcall, "Data type incompatibility for value passed to first parameter when invoking function '%s'", ((identifier_c *)fcall_data.function_name)->value);

   252

							STAGE3_ERROR(0, value, value, "This is the IL instruction producing the incompatible data type to first parameter of function '%s'", ((identifier_c *)fcall_data.function_name)->value);

   253

						}

   254

					}

   255

#else

   256

					if (!get_datatype_info_c::is_type_valid(il_instruction_symbol->datatype)) {

   257

						function_invocation_error = true;

   258

						STAGE3_ERROR(0, fcall, fcall, "Data type incompatibility between value in IL 'accumulator' and first parameter of function '%s'", ((identifier_c *)fcall_data.function_name)->value);

   259

					}

   260

#endif

   261

					if (function_invocation_error)

   262

						/* when handling a IL function call, and an error is found in the first parameter, then we bug out and do not print out any more error messages. */

   263

						return;

   264

				}

   265

				else if (!get_datatype_info_c::is_type_valid(param_value->datatype)) {

   266

					function_invocation_error = true;

   267

					STAGE3_ERROR(0, param_value, param_value, "Data type incompatibility for value passed in position %d when invoking %s '%s'", i, POU_str, ((identifier_c *)fcall_data.function_name)->value);

   268

				}

   269

			}

   270

	}

   271

   272

	if (NULL == fcall_data.called_function_declaration) {

   273

		function_invocation_error = true;

   274

		STAGE3_ERROR(0, fcall, fcall, "Unable to resolve which overloaded %s '%s' is being invoked.", POU_str, ((identifier_c *)fcall_data.function_name)->value);

   275

	}

   276

   277

	if (function_invocation_error) {

   278

		/* No compatible function exists */

   279

		STAGE3_ERROR(2, fcall, fcall, "Invalid parameters when invoking %s '%s'", POU_str, ((identifier_c *)fcall_data.function_name)->value);

   280

	} 

   281

   282

	return;

   283

}

   284

   285

   286

   287

void *print_datatypes_error_c::handle_implicit_il_fb_invocation(const char *param_name, symbol_c *il_operator, symbol_c *called_fb_declaration) {

   288

	if (NULL == il_operand) {

   289

		STAGE3_ERROR(0, il_operator, il_operator, "Missing operand for FB call operator '%s'.", param_name);

   290

		return NULL;

   291

	}

   292

	il_operand->accept(*this);

   293

   294

	if (NULL == called_fb_declaration) {

   295

		STAGE3_ERROR(0, il_operator, il_operand, "Invalid FB call: operand is not a FB instance.");

   296

		return NULL;

   297

	}

   298

   299

	if (fake_prev_il_instruction->prev_il_instruction.empty()) {

   300

		STAGE3_ERROR(0, il_operator, il_operand, "FB invocation operator '%s' must be preceded by a 'LD' (or equivalent) operator.", param_name);	

   301

		return NULL;

   302

	}

   303

   304

	/* Find the corresponding parameter in function declaration */

   305

	function_param_iterator_c fp_iterator(called_fb_declaration);

   306

	if (NULL == fp_iterator.search(param_name)) {

   307

		/* TODO: must also check whther it is an IN parameter!! */

   308

		/* NOTE: although all standard FBs have the implicit FB calls defined as input parameters

   309

		*        (i.e., for all standard FBs, CLK, PT, IN, CU, CD, S1, R1, etc... is always an input parameter)

   310

		*        if a non-standard (i.e. a FB not defined in the standard library) FB is being called, then

   311

		*        this (CLK, PT, IN, CU, ...) parameter may just have been defined as OUT or INOUT,

   312

		*        which will not work for an implicit FB call!

   313

		*/

   314

		STAGE3_ERROR(0, il_operator, il_operand, "FB called by '%s' operator does not have a parameter named '%s'", param_name, param_name);	

   315

		return NULL;

   316

	}

   318

		STAGE3_ERROR(0, il_operator, il_operand, "Data type incompatibility between parameter '%s' and value being passed.", param_name);

   319

		return NULL;

   320

	}

   321

   322

   323

	/* NOTE: The error_level currently being used for errors in variables/constants etc... is rather high.

   324

	 *       However, in the case of an implicit FB call, if the datatype of the operand == NULL, this may be

   325

	 *       the __only__ indication of an error! So we test it here again, to make sure thtis error will really

   326

	 *       be printed out!

   327

	 */

   328

	if (NULL == il_operand->datatype) {

   329

		/* Note: the case of (NULL == fb_declaration) was already caught above! */

   330

// 		if (NULL != fb_declaration) {

   331

			STAGE3_ERROR(0, il_operator, il_operator, "Invalid FB call: Datatype incompatibility between the FB's '%s' parameter and value being passed, or paramater '%s' is not a 'VAR_INPUT' parameter.", param_name, param_name);

   332

			return NULL;

   333

// 		}

   334

	}

   335

   336

	return NULL;

   337

}

   338

   339

   340

/*********************/

   341

/* B 1.2 - Constants */

   342

/*********************/

   343

/******************************/

   344

/* B 1.2.1 - Numeric Literals */

   345

/******************************/

   346

void *print_datatypes_error_c::visit(real_c *symbol) {

   347

	if (symbol->candidate_datatypes.size() == 0) {

   348

		STAGE3_ERROR(0, symbol, symbol, "Numerical value exceeds range for ANY_REAL data type.");

   349

	} else if (NULL == symbol->datatype) {

   350

		STAGE3_ERROR(4, symbol, symbol, "ANY_REAL data type not valid in this location.");

   351

	}

   352

	return NULL;

   353

}

   354

   355

void *print_datatypes_error_c::visit(integer_c *symbol) {

   356

	if (symbol->candidate_datatypes.size() == 0) {

   357

		STAGE3_ERROR(0, symbol, symbol, "Numerical value exceeds range for ANY_INT data type.");

   358

	} else if (NULL == symbol->datatype) {

   359

		STAGE3_ERROR(4, symbol, symbol, "ANY_INT data type not valid in this location.");

   360

	}

   361

	return NULL;

   362

}

   363

   364

void *print_datatypes_error_c::visit(neg_real_c *symbol) {

   365

	if (symbol->candidate_datatypes.size() == 0) {

   366

		STAGE3_ERROR(0, symbol, symbol, "Numerical value exceeds range for ANY_REAL data type.");

   367

	} else if (NULL == symbol->datatype) {

   368

		STAGE3_ERROR(4, symbol, symbol, "ANY_REAL data type not valid in this location.");

   369

	}

   370

	return NULL;

   371

}

   372

   373

void *print_datatypes_error_c::visit(neg_integer_c *symbol) {

   374

	if (symbol->candidate_datatypes.size() == 0) {

   375

		STAGE3_ERROR(0, symbol, symbol, "Numerical value exceeds range for ANY_INT data type.");

   376

	} else if (NULL == symbol->datatype) {

   377

		STAGE3_ERROR(4, symbol, symbol, "ANY_INT data type not valid in this location.");

   378

	}

   379

	return NULL;

   380

}

   381

   382

void *print_datatypes_error_c::visit(binary_integer_c *symbol) {

   383

	if (symbol->candidate_datatypes.size() == 0) {

   384

		STAGE3_ERROR(0, symbol, symbol, "Numerical value exceeds range for ANY_INT data type.");

   385

	} else if (NULL == symbol->datatype) {

   386

		STAGE3_ERROR(4, symbol, symbol, "ANY_INT data type not valid in this location.");

   387

	}

   388

	return NULL;

   389

}

   390

   391

void *print_datatypes_error_c::visit(octal_integer_c *symbol) {

   392

	if (symbol->candidate_datatypes.size() == 0) {

   393

		STAGE3_ERROR(0, symbol, symbol, "Numerical value exceeds range for ANY_INT data type.");

   394

	} else if (NULL == symbol->datatype) {

   395

		STAGE3_ERROR(4, symbol, symbol, "ANY_INT data type not valid in this location.");

   396

	}

   397

	return NULL;

   398

}

   399

   400

void *print_datatypes_error_c::visit(hex_integer_c *symbol) {

   401

	if (symbol->candidate_datatypes.size() == 0) {

   402

		STAGE3_ERROR(0, symbol, symbol, "Numerical value exceeds range for ANY_INT data type.");

   403

	} else if (NULL == symbol->datatype) {

   404

		STAGE3_ERROR(4, symbol, symbol, "ANY_INT data type not valid in this location.");

   405

	}

   406

	return NULL;

   407

}

   408

   409

void *print_datatypes_error_c::visit(integer_literal_c *symbol) {

   410

	if (symbol->candidate_datatypes.size() == 0) {

   411

		STAGE3_ERROR(0, symbol, symbol, "Numerical value exceeds range for %s data type.", elementary_type_c::to_string(symbol->type));

   412

	} else if (NULL == symbol->datatype) {

   413

		STAGE3_ERROR(4, symbol, symbol, "ANY_INT data type not valid in this location.");

   414

	}

   415

	return NULL;

   416

}

   417

   418

void *print_datatypes_error_c::visit(real_literal_c *symbol) {

   419

	if (symbol->candidate_datatypes.size() == 0) {

   420

		STAGE3_ERROR(0, symbol, symbol, "Numerical value exceeds range for %s data type.", elementary_type_c::to_string(symbol->type));

   421

	} else if (NULL == symbol->datatype) {

   422

		STAGE3_ERROR(4, symbol, symbol, "ANY_REAL data type not valid in this location.");

   423

	}

   424

	return NULL;

   425

}

   426

   427

void *print_datatypes_error_c::visit(bit_string_literal_c *symbol) {

   428

	if (symbol->candidate_datatypes.size() == 0) {

   429

		STAGE3_ERROR(0, symbol, symbol, "Numerical value exceeds range for %s data type.", elementary_type_c::to_string(symbol->type));

   430

	} else if (NULL == symbol->datatype) {

   431

		STAGE3_ERROR(4, symbol, symbol, "ANY_BIT data type not valid in this location.");

   432

	}

   433

	return NULL;

   434

}

   435

   436

void *print_datatypes_error_c::visit(boolean_literal_c *symbol) {

   437

	if (symbol->candidate_datatypes.size() == 0) {

   438

		STAGE3_ERROR(0, symbol, symbol, "Value is not valid for %s data type.", elementary_type_c::to_string(symbol->type));

   439

	} else if (NULL == symbol->datatype) {

   440

		STAGE3_ERROR(4, symbol, symbol, "ANY_BOOL data type not valid in this location.");

   441

	}

   442

	return NULL;

   443

}

   444

   445

void *print_datatypes_error_c::visit(boolean_true_c *symbol) {

   446

	if (symbol->candidate_datatypes.size() == 0) {

   447

		STAGE3_ERROR(0, symbol, symbol, "Value is not valid for ANY_BOOL data type.");

   448

	} else if (NULL == symbol->datatype) {

   449

		STAGE3_ERROR(4, symbol, symbol, "ANY_BOOL data type not valid in this location.");

   450

	}

   451

	return NULL;

   452

}

   453

   454

void *print_datatypes_error_c::visit(boolean_false_c *symbol) {

   455

	if (symbol->candidate_datatypes.size() == 0) {

   456

		STAGE3_ERROR(0, symbol, symbol, "Value is not valid for ANY_BOOL data type.");

   457

	} else if (NULL == symbol->datatype) {

   458

		STAGE3_ERROR(4, symbol, symbol, "ANY_BOOL data type not valid in this location.");

   459

	}

   460

	return NULL;

   461

}

   462

   463

/*******************************/

   464

/* B.1.2.2   Character Strings */

   465

/*******************************/

   466

void *print_datatypes_error_c::visit(double_byte_character_string_c *symbol) {

   467

	if (symbol->candidate_datatypes.size() == 0) {

   468

		STAGE3_ERROR(0, symbol, symbol, "Numerical value exceeds range for WSTRING data type.");

   469

	} else if (NULL == symbol->datatype) {

   470

		STAGE3_ERROR(4, symbol, symbol, "WSTRING data type not valid in this location.");

   471

	}

   472

	return NULL;

   473

}

   474

   475

void *print_datatypes_error_c::visit(single_byte_character_string_c *symbol) {

   476

	if (symbol->candidate_datatypes.size() == 0) {

   477

		STAGE3_ERROR(0, symbol, symbol, "Numerical value exceeds range for STRING data type.");

   478

	} else if (NULL == symbol->datatype) {

   479

		STAGE3_ERROR(4, symbol, symbol, "STRING data type not valid in this location.");

   480

	}

   481

	return NULL;

   482

}

   483

   484

/***************************/

   485

/* B 1.2.3 - Time Literals */

   486

/***************************/

   487

/************************/

   488

/* B 1.2.3.1 - Duration */

   489

/************************/

   490

void *print_datatypes_error_c::visit(duration_c *symbol) {

   491

	if (symbol->candidate_datatypes.size() == 0) {

   492

		STAGE3_ERROR(0, symbol, symbol, "Invalid syntax for TIME data type.");

   493

	} else if (NULL == symbol->datatype) {

   494

		STAGE3_ERROR(4, symbol, symbol, "TIME data type not valid in this location.");

   495

	}

   496

	return NULL;

   497

}

   498

   499

/************************************/

   500

/* B 1.2.3.2 - Time of day and Date */