cmFortranParser: Factor out of cmDependsFortran

Move the main parser class and method implementations out of
cmDependsFortran.cxx and into separate source files.
This commit is contained in:
Brad King 2015-07-22 14:03:00 -04:00
parent fd19445802
commit eebe732bb6
4 changed files with 488 additions and 465 deletions

View File

@ -244,6 +244,7 @@ set(SRCS
cmFortranLexer.h cmFortranLexer.h
cmFortranParser.cxx cmFortranParser.cxx
cmFortranParser.h cmFortranParser.h
cmFortranParserImpl.cxx
cmGeneratedFileStream.cxx cmGeneratedFileStream.cxx
cmGeneratorExpressionContext.cxx cmGeneratorExpressionContext.cxx
cmGeneratorExpressionContext.h cmGeneratorExpressionContext.h

View File

@ -19,83 +19,11 @@
#include "cmFortranParser.h" /* Interface to parser object. */ #include "cmFortranParser.h" /* Interface to parser object. */
#include <cmsys/FStream.hxx> #include <cmsys/FStream.hxx>
#include <assert.h> #include <assert.h>
#include <stack>
// TODO: Test compiler for the case of the mod file. Some always // TODO: Test compiler for the case of the mod file. Some always
// use lower case and some always use upper case. I do not know if any // use lower case and some always use upper case. I do not know if any
// use the case from the source code. // use the case from the source code.
//----------------------------------------------------------------------------
// Information about a single source file.
class cmFortranSourceInfo
{
public:
// The name of the source file.
std::string Source;
// Set of provided and required modules.
std::set<std::string> Provides;
std::set<std::string> Requires;
// Set of files included in the translation unit.
std::set<std::string> Includes;
};
//----------------------------------------------------------------------------
// Parser methods not included in generated interface.
// Get the current buffer processed by the lexer.
YY_BUFFER_STATE cmFortranLexer_GetCurrentBuffer(yyscan_t yyscanner);
// The parser entry point.
int cmFortran_yyparse(yyscan_t);
//----------------------------------------------------------------------------
// Define parser object internal structure.
struct cmFortranFile
{
cmFortranFile(FILE* file, YY_BUFFER_STATE buffer,
const std::string& dir):
File(file), Buffer(buffer), Directory(dir) {}
FILE* File;
YY_BUFFER_STATE Buffer;
std::string Directory;
};
struct cmFortranParser_s
{
cmFortranParser_s(std::vector<std::string> const& includes,
std::set<std::string> const& defines,
cmFortranSourceInfo& info);
~cmFortranParser_s();
bool FindIncludeFile(const char* dir, const char* includeName,
std::string& fileName);
// The include file search path.
std::vector<std::string> IncludePath;
// Lexical scanner instance.
yyscan_t Scanner;
// Stack of open files in the translation unit.
std::stack<cmFortranFile> FileStack;
// Buffer for string literals.
std::string TokenString;
// Flag for whether lexer is reading from inside an interface.
bool InInterface;
int OldStartcond;
std::set<std::string> PPDefinitions;
size_t InPPFalseBranch;
std::stack<bool> SkipToEnd;
// Information about the parsed source.
cmFortranSourceInfo& Info;
};
//---------------------------------------------------------------------------- //----------------------------------------------------------------------------
class cmDependsFortranInternals class cmDependsFortranInternals
{ {
@ -882,396 +810,3 @@ bool cmDependsFortran::ModulesDiffer(const char* modFile,
// The modules are different. // The modules are different.
return true; return true;
} }
//----------------------------------------------------------------------------
bool cmFortranParser_s::FindIncludeFile(const char* dir,
const char* includeName,
std::string& fileName)
{
// If the file is a full path, include it directly.
if(cmSystemTools::FileIsFullPath(includeName))
{
fileName = includeName;
return cmSystemTools::FileExists(fileName.c_str(), true);
}
else
{
// Check for the file in the directory containing the including
// file.
std::string fullName = dir;
fullName += "/";
fullName += includeName;
if(cmSystemTools::FileExists(fullName.c_str(), true))
{
fileName = fullName;
return true;
}
// Search the include path for the file.
for(std::vector<std::string>::const_iterator i =
this->IncludePath.begin(); i != this->IncludePath.end(); ++i)
{
fullName = *i;
fullName += "/";
fullName += includeName;
if(cmSystemTools::FileExists(fullName.c_str(), true))
{
fileName = fullName;
return true;
}
}
}
return false;
}
//----------------------------------------------------------------------------
cmFortranParser_s
::cmFortranParser_s(std::vector<std::string> const& includes,
std::set<std::string> const& defines,
cmFortranSourceInfo& info):
IncludePath(includes), PPDefinitions(defines), Info(info)
{
this->InInterface = 0;
this->InPPFalseBranch = 0;
// Initialize the lexical scanner.
cmFortran_yylex_init(&this->Scanner);
cmFortran_yyset_extra(this, this->Scanner);
// Create a dummy buffer that is never read but is the fallback
// buffer when the last file is popped off the stack.
YY_BUFFER_STATE buffer =
cmFortran_yy_create_buffer(0, 4, this->Scanner);
cmFortran_yy_switch_to_buffer(buffer, this->Scanner);
}
//----------------------------------------------------------------------------
cmFortranParser_s::~cmFortranParser_s()
{
cmFortran_yylex_destroy(this->Scanner);
}
//----------------------------------------------------------------------------
bool cmFortranParser_FilePush(cmFortranParser* parser,
const char* fname)
{
// Open the new file and push it onto the stack. Save the old
// buffer with it on the stack.
if(FILE* file = cmsys::SystemTools::Fopen(fname, "rb"))
{
YY_BUFFER_STATE current =
cmFortranLexer_GetCurrentBuffer(parser->Scanner);
std::string dir = cmSystemTools::GetParentDirectory(fname);
cmFortranFile f(file, current, dir);
YY_BUFFER_STATE buffer =
cmFortran_yy_create_buffer(0, 16384, parser->Scanner);
cmFortran_yy_switch_to_buffer(buffer, parser->Scanner);
parser->FileStack.push(f);
return 1;
}
else
{
return 0;
}
}
//----------------------------------------------------------------------------
bool cmFortranParser_FilePop(cmFortranParser* parser)
{
// Pop one file off the stack and close it. Switch the lexer back
// to the next one on the stack.
if(parser->FileStack.empty())
{
return 0;
}
else
{
cmFortranFile f = parser->FileStack.top(); parser->FileStack.pop();
fclose(f.File);
YY_BUFFER_STATE current =
cmFortranLexer_GetCurrentBuffer(parser->Scanner);
cmFortran_yy_delete_buffer(current, parser->Scanner);
cmFortran_yy_switch_to_buffer(f.Buffer, parser->Scanner);
return 1;
}
}
//----------------------------------------------------------------------------
int cmFortranParser_Input(cmFortranParser* parser,
char* buffer, size_t bufferSize)
{
// Read from the file on top of the stack. If the stack is empty,
// the end of the translation unit has been reached.
if(!parser->FileStack.empty())
{
FILE* file = parser->FileStack.top().File;
return (int)fread(buffer, 1, bufferSize, file);
}
return 0;
}
//----------------------------------------------------------------------------
void cmFortranParser_StringStart(cmFortranParser* parser)
{
parser->TokenString = "";
}
//----------------------------------------------------------------------------
const char* cmFortranParser_StringEnd(cmFortranParser* parser)
{
return parser->TokenString.c_str();
}
//----------------------------------------------------------------------------
void cmFortranParser_StringAppend(cmFortranParser* parser,
char c)
{
parser->TokenString += c;
}
//----------------------------------------------------------------------------
void cmFortranParser_SetInInterface(cmFortranParser* parser,
bool in)
{
if(parser->InPPFalseBranch)
{
return;
}
parser->InInterface = in;
}
//----------------------------------------------------------------------------
bool cmFortranParser_GetInInterface(cmFortranParser* parser)
{
return parser->InInterface;
}
//----------------------------------------------------------------------------
void cmFortranParser_SetOldStartcond(cmFortranParser* parser,
int arg)
{
parser->OldStartcond = arg;
}
//----------------------------------------------------------------------------
int cmFortranParser_GetOldStartcond(cmFortranParser* parser)
{
return parser->OldStartcond;
}
//----------------------------------------------------------------------------
void cmFortranParser_Error(cmFortranParser*, const char*)
{
// If there is a parser error just ignore it. The source will not
// compile and the user will edit it. Then dependencies will have
// to be regenerated anyway.
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleUse(cmFortranParser* parser,
const char* name)
{
if(!parser->InPPFalseBranch)
{
parser->Info.Requires.insert(cmSystemTools::LowerCase(name) );
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleInclude(cmFortranParser* parser,
const char* name)
{
if(parser->InPPFalseBranch)
{
return;
}
// If processing an include statement there must be an open file.
assert(!parser->FileStack.empty());
// Get the directory containing the source in which the include
// statement appears. This is always the first search location for
// Fortran include files.
std::string dir = parser->FileStack.top().Directory;
// Find the included file. If it cannot be found just ignore the
// problem because either the source will not compile or the user
// does not care about depending on this included source.
std::string fullName;
if(parser->FindIncludeFile(dir.c_str(), name, fullName))
{
// Found the included file. Save it in the set of included files.
parser->Info.Includes.insert(fullName);
// Parse it immediately to translate the source inline.
cmFortranParser_FilePush(parser, fullName.c_str());
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleModule(cmFortranParser* parser,
const char* name)
{
if(!parser->InPPFalseBranch && !parser->InInterface)
{
parser->Info.Provides.insert(cmSystemTools::LowerCase(name));
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleDefine(cmFortranParser* parser,
const char* macro)
{
if(!parser->InPPFalseBranch)
{
parser->PPDefinitions.insert(macro);
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleUndef(cmFortranParser* parser,
const char* macro)
{
if(!parser->InPPFalseBranch)
{
std::set<std::string>::iterator match;
match = parser->PPDefinitions.find(macro);
if(match != parser->PPDefinitions.end())
{
parser->PPDefinitions.erase(match);
}
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleIfdef(cmFortranParser* parser,
const char* macro)
{
// A new PP branch has been opened
parser->SkipToEnd.push(false);
if (parser->InPPFalseBranch)
{
parser->InPPFalseBranch++;
}
else if(parser->PPDefinitions.find(macro) == parser->PPDefinitions.end())
{
parser->InPPFalseBranch=1;
}
else
{
parser->SkipToEnd.top() = true;
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleIfndef(cmFortranParser* parser,
const char* macro)
{
// A new PP branch has been opened
parser->SkipToEnd.push(false);
if (parser->InPPFalseBranch)
{
parser->InPPFalseBranch++;
}
else if(parser->PPDefinitions.find(macro) != parser->PPDefinitions.end())
{
parser->InPPFalseBranch = 1;
}
else
{
// ignore other branches
parser->SkipToEnd.top() = true;
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleIf(cmFortranParser* parser)
{
/* Note: The current parser is _not_ able to get statements like
* #if 0
* #if 1
* #if MYSMBOL
* #if defined(MYSYMBOL)
* #if defined(MYSYMBOL) && ...
* right. The same for #elif. Thus in
* #if SYMBOL_1
* ..
* #elif SYMBOL_2
* ...
* ...
* #elif SYMBOL_N
* ..
* #else
* ..
* #endif
* _all_ N+1 branches are considered. If you got something like this
* #if defined(MYSYMBOL)
* #if !defined(MYSYMBOL)
* use
* #ifdef MYSYMBOL
* #ifndef MYSYMBOL
* instead.
*/
// A new PP branch has been opened
// Never skip! See note above.
parser->SkipToEnd.push(false);
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleElif(cmFortranParser* parser)
{
/* Note: There are parser limitations. See the note at
* cmFortranParser_RuleIf(..)
*/
// Always taken unless an #ifdef or #ifndef-branch has been taken
// already. If the second condition isn't meet already
// (parser->InPPFalseBranch == 0) correct it.
if(!parser->SkipToEnd.empty() &&
parser->SkipToEnd.top() && !parser->InPPFalseBranch)
{
parser->InPPFalseBranch = 1;
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleElse(cmFortranParser* parser)
{
// if the parent branch is false do nothing!
if(parser->InPPFalseBranch > 1)
{
return;
}
// parser->InPPFalseBranch is either 0 or 1. We change it depending on
// parser->SkipToEnd.top()
if(!parser->SkipToEnd.empty() &&
parser->SkipToEnd.top())
{
parser->InPPFalseBranch = 1;
}
else
{
parser->InPPFalseBranch = 0;
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleEndif(cmFortranParser* parser)
{
if(!parser->SkipToEnd.empty())
{
parser->SkipToEnd.pop();
}
// #endif doesn't know if there was a "#else" in before, so it
// always decreases InPPFalseBranch
if(parser->InPPFalseBranch)
{
parser->InPPFalseBranch--;
}
}

View File

@ -12,6 +12,10 @@
#ifndef cmFortranParser_h #ifndef cmFortranParser_h
#define cmFortranParser_h #define cmFortranParser_h
#if !defined(cmFortranLexer_cxx) && !defined(cmFortranParser_cxx)
# include "cmStandardIncludes.h"
#endif
#include <stddef.h> /* size_t */ #include <stddef.h> /* size_t */
/* Forward declare parser object type. */ /* Forward declare parser object type. */
@ -93,4 +97,79 @@ int cmFortran_yylex(YYSTYPE* yylvalp, yyscan_t yyscanner)
#endif #endif
#endif #endif
#if !defined(cmFortranLexer_cxx) && !defined(cmFortranParser_cxx)
#include <stack>
//----------------------------------------------------------------------------
// Information about a single source file.
class cmFortranSourceInfo
{
public:
// The name of the source file.
std::string Source;
// Set of provided and required modules.
std::set<std::string> Provides;
std::set<std::string> Requires;
// Set of files included in the translation unit.
std::set<std::string> Includes;
};
//----------------------------------------------------------------------------
// Parser methods not included in generated interface.
// Get the current buffer processed by the lexer.
YY_BUFFER_STATE cmFortranLexer_GetCurrentBuffer(yyscan_t yyscanner);
// The parser entry point.
int cmFortran_yyparse(yyscan_t);
//----------------------------------------------------------------------------
// Define parser object internal structure.
struct cmFortranFile
{
cmFortranFile(FILE* file, YY_BUFFER_STATE buffer,
const std::string& dir):
File(file), Buffer(buffer), Directory(dir) {}
FILE* File;
YY_BUFFER_STATE Buffer;
std::string Directory;
};
struct cmFortranParser_s
{
cmFortranParser_s(std::vector<std::string> const& includes,
std::set<std::string> const& defines,
cmFortranSourceInfo& info);
~cmFortranParser_s();
bool FindIncludeFile(const char* dir, const char* includeName,
std::string& fileName);
// The include file search path.
std::vector<std::string> IncludePath;
// Lexical scanner instance.
yyscan_t Scanner;
// Stack of open files in the translation unit.
std::stack<cmFortranFile> FileStack;
// Buffer for string literals.
std::string TokenString;
// Flag for whether lexer is reading from inside an interface.
bool InInterface;
int OldStartcond;
std::set<std::string> PPDefinitions;
size_t InPPFalseBranch;
std::stack<bool> SkipToEnd;
// Information about the parsed source.
cmFortranSourceInfo& Info;
};
#endif
#endif #endif

View File

@ -0,0 +1,408 @@
/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2015 Kitware, Inc., Insight Software Consortium
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 "cmFortranParser.h"
#include "cmSystemTools.h"
#include <assert.h>
//----------------------------------------------------------------------------
bool cmFortranParser_s::FindIncludeFile(const char* dir,
const char* includeName,
std::string& fileName)
{
// If the file is a full path, include it directly.
if(cmSystemTools::FileIsFullPath(includeName))
{
fileName = includeName;
return cmSystemTools::FileExists(fileName.c_str(), true);
}
else
{
// Check for the file in the directory containing the including
// file.
std::string fullName = dir;
fullName += "/";
fullName += includeName;
if(cmSystemTools::FileExists(fullName.c_str(), true))
{
fileName = fullName;
return true;
}
// Search the include path for the file.
for(std::vector<std::string>::const_iterator i =
this->IncludePath.begin(); i != this->IncludePath.end(); ++i)
{
fullName = *i;
fullName += "/";
fullName += includeName;
if(cmSystemTools::FileExists(fullName.c_str(), true))
{
fileName = fullName;
return true;
}
}
}
return false;
}
//----------------------------------------------------------------------------
cmFortranParser_s
::cmFortranParser_s(std::vector<std::string> const& includes,
std::set<std::string> const& defines,
cmFortranSourceInfo& info):
IncludePath(includes), PPDefinitions(defines), Info(info)
{
this->InInterface = 0;
this->InPPFalseBranch = 0;
// Initialize the lexical scanner.
cmFortran_yylex_init(&this->Scanner);
cmFortran_yyset_extra(this, this->Scanner);
// Create a dummy buffer that is never read but is the fallback
// buffer when the last file is popped off the stack.
YY_BUFFER_STATE buffer =
cmFortran_yy_create_buffer(0, 4, this->Scanner);
cmFortran_yy_switch_to_buffer(buffer, this->Scanner);
}
//----------------------------------------------------------------------------
cmFortranParser_s::~cmFortranParser_s()
{
cmFortran_yylex_destroy(this->Scanner);
}
//----------------------------------------------------------------------------
bool cmFortranParser_FilePush(cmFortranParser* parser,
const char* fname)
{
// Open the new file and push it onto the stack. Save the old
// buffer with it on the stack.
if(FILE* file = cmsys::SystemTools::Fopen(fname, "rb"))
{
YY_BUFFER_STATE current =
cmFortranLexer_GetCurrentBuffer(parser->Scanner);
std::string dir = cmSystemTools::GetParentDirectory(fname);
cmFortranFile f(file, current, dir);
YY_BUFFER_STATE buffer =
cmFortran_yy_create_buffer(0, 16384, parser->Scanner);
cmFortran_yy_switch_to_buffer(buffer, parser->Scanner);
parser->FileStack.push(f);
return 1;
}
else
{
return 0;
}
}
//----------------------------------------------------------------------------
bool cmFortranParser_FilePop(cmFortranParser* parser)
{
// Pop one file off the stack and close it. Switch the lexer back
// to the next one on the stack.
if(parser->FileStack.empty())
{
return 0;
}
else
{
cmFortranFile f = parser->FileStack.top(); parser->FileStack.pop();
fclose(f.File);
YY_BUFFER_STATE current =
cmFortranLexer_GetCurrentBuffer(parser->Scanner);
cmFortran_yy_delete_buffer(current, parser->Scanner);
cmFortran_yy_switch_to_buffer(f.Buffer, parser->Scanner);
return 1;
}
}
//----------------------------------------------------------------------------
int cmFortranParser_Input(cmFortranParser* parser,
char* buffer, size_t bufferSize)
{
// Read from the file on top of the stack. If the stack is empty,
// the end of the translation unit has been reached.
if(!parser->FileStack.empty())
{
FILE* file = parser->FileStack.top().File;
return (int)fread(buffer, 1, bufferSize, file);
}
return 0;
}
//----------------------------------------------------------------------------
void cmFortranParser_StringStart(cmFortranParser* parser)
{
parser->TokenString = "";
}
//----------------------------------------------------------------------------
const char* cmFortranParser_StringEnd(cmFortranParser* parser)
{
return parser->TokenString.c_str();
}
//----------------------------------------------------------------------------
void cmFortranParser_StringAppend(cmFortranParser* parser,
char c)
{
parser->TokenString += c;
}
//----------------------------------------------------------------------------
void cmFortranParser_SetInInterface(cmFortranParser* parser,
bool in)
{
if(parser->InPPFalseBranch)
{
return;
}
parser->InInterface = in;
}
//----------------------------------------------------------------------------
bool cmFortranParser_GetInInterface(cmFortranParser* parser)
{
return parser->InInterface;
}
//----------------------------------------------------------------------------
void cmFortranParser_SetOldStartcond(cmFortranParser* parser,
int arg)
{
parser->OldStartcond = arg;
}
//----------------------------------------------------------------------------
int cmFortranParser_GetOldStartcond(cmFortranParser* parser)
{
return parser->OldStartcond;
}
//----------------------------------------------------------------------------
void cmFortranParser_Error(cmFortranParser*, const char*)
{
// If there is a parser error just ignore it. The source will not
// compile and the user will edit it. Then dependencies will have
// to be regenerated anyway.
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleUse(cmFortranParser* parser,
const char* name)
{
if(!parser->InPPFalseBranch)
{
parser->Info.Requires.insert(cmSystemTools::LowerCase(name) );
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleInclude(cmFortranParser* parser,
const char* name)
{
if(parser->InPPFalseBranch)
{
return;
}
// If processing an include statement there must be an open file.
assert(!parser->FileStack.empty());
// Get the directory containing the source in which the include
// statement appears. This is always the first search location for
// Fortran include files.
std::string dir = parser->FileStack.top().Directory;
// Find the included file. If it cannot be found just ignore the
// problem because either the source will not compile or the user
// does not care about depending on this included source.
std::string fullName;
if(parser->FindIncludeFile(dir.c_str(), name, fullName))
{
// Found the included file. Save it in the set of included files.
parser->Info.Includes.insert(fullName);
// Parse it immediately to translate the source inline.
cmFortranParser_FilePush(parser, fullName.c_str());
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleModule(cmFortranParser* parser,
const char* name)
{
if(!parser->InPPFalseBranch && !parser->InInterface)
{
parser->Info.Provides.insert(cmSystemTools::LowerCase(name));
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleDefine(cmFortranParser* parser,
const char* macro)
{
if(!parser->InPPFalseBranch)
{
parser->PPDefinitions.insert(macro);
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleUndef(cmFortranParser* parser,
const char* macro)
{
if(!parser->InPPFalseBranch)
{
std::set<std::string>::iterator match;
match = parser->PPDefinitions.find(macro);
if(match != parser->PPDefinitions.end())
{
parser->PPDefinitions.erase(match);
}
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleIfdef(cmFortranParser* parser,
const char* macro)
{
// A new PP branch has been opened
parser->SkipToEnd.push(false);
if (parser->InPPFalseBranch)
{
parser->InPPFalseBranch++;
}
else if(parser->PPDefinitions.find(macro) == parser->PPDefinitions.end())
{
parser->InPPFalseBranch=1;
}
else
{
parser->SkipToEnd.top() = true;
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleIfndef(cmFortranParser* parser,
const char* macro)
{
// A new PP branch has been opened
parser->SkipToEnd.push(false);
if (parser->InPPFalseBranch)
{
parser->InPPFalseBranch++;
}
else if(parser->PPDefinitions.find(macro) != parser->PPDefinitions.end())
{
parser->InPPFalseBranch = 1;
}
else
{
// ignore other branches
parser->SkipToEnd.top() = true;
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleIf(cmFortranParser* parser)
{
/* Note: The current parser is _not_ able to get statements like
* #if 0
* #if 1
* #if MYSMBOL
* #if defined(MYSYMBOL)
* #if defined(MYSYMBOL) && ...
* right. The same for #elif. Thus in
* #if SYMBOL_1
* ..
* #elif SYMBOL_2
* ...
* ...
* #elif SYMBOL_N
* ..
* #else
* ..
* #endif
* _all_ N+1 branches are considered. If you got something like this
* #if defined(MYSYMBOL)
* #if !defined(MYSYMBOL)
* use
* #ifdef MYSYMBOL
* #ifndef MYSYMBOL
* instead.
*/
// A new PP branch has been opened
// Never skip! See note above.
parser->SkipToEnd.push(false);
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleElif(cmFortranParser* parser)
{
/* Note: There are parser limitations. See the note at
* cmFortranParser_RuleIf(..)
*/
// Always taken unless an #ifdef or #ifndef-branch has been taken
// already. If the second condition isn't meet already
// (parser->InPPFalseBranch == 0) correct it.
if(!parser->SkipToEnd.empty() &&
parser->SkipToEnd.top() && !parser->InPPFalseBranch)
{
parser->InPPFalseBranch = 1;
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleElse(cmFortranParser* parser)
{
// if the parent branch is false do nothing!
if(parser->InPPFalseBranch > 1)
{
return;
}
// parser->InPPFalseBranch is either 0 or 1. We change it depending on
// parser->SkipToEnd.top()
if(!parser->SkipToEnd.empty() &&
parser->SkipToEnd.top())
{
parser->InPPFalseBranch = 1;
}
else
{
parser->InPPFalseBranch = 0;
}
}
//----------------------------------------------------------------------------
void cmFortranParser_RuleEndif(cmFortranParser* parser)
{
if(!parser->SkipToEnd.empty())
{
parser->SkipToEnd.pop();
}
// #endif doesn't know if there was a "#else" in before, so it
// always decreases InPPFalseBranch
if(parser->InPPFalseBranch)
{
parser->InPPFalseBranch--;
}
}