From 2d5e6330e9901d4bb7c1abbf5e5a78f4e8b30004 Mon Sep 17 00:00:00 2001
From: sbh <sergey.belash@opencascade.com>
Date: Mon, 13 Apr 2015 18:37:38 +0300
Subject: [PATCH] Variable validation without regexp

---
 .../ParametersPlugin_Validators.cpp             | 17 +++++++++++++++--
 .../ParametersPlugin_Validators.h               |  6 +++---
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/src/ParametersPlugin/ParametersPlugin_Validators.cpp b/src/ParametersPlugin/ParametersPlugin_Validators.cpp
index dc7eb066c..788e16398 100644
--- a/src/ParametersPlugin/ParametersPlugin_Validators.cpp
+++ b/src/ParametersPlugin/ParametersPlugin_Validators.cpp
@@ -13,7 +13,6 @@
 
 ParametersPlugin_VariableValidator::ParametersPlugin_VariableValidator()
 {
-  myPyVariableRegex = std::regex("[_a-zA-Z][a-zA-Z0-9_]*");
 }
 
 ParametersPlugin_VariableValidator::~ParametersPlugin_VariableValidator()
@@ -24,10 +23,24 @@ bool ParametersPlugin_VariableValidator::isValid(const AttributePtr& theAttribut
                                                  const std::list<std::string>& theArguments) const
 {
   AttributeStringPtr aStrAttr = std::dynamic_pointer_cast<ModelAPI_AttributeString>(theAttribute);
-  bool result = std::regex_match(aStrAttr->value(), myPyVariableRegex);
+  bool result = isVariable(aStrAttr->value());
   return result;
 }
 
+bool ParametersPlugin_VariableValidator::isVariable(const std::string& theString) const
+{
+  std::string::const_iterator it = theString.begin();
+  if (!(isalpha(*it) || (*it) == '_') || it == theString.end())
+    return false;
+  it++;
+  for ( ; it != theString.end(); ++it ) {
+    if(!(isalnum(*it) || (*it) == '_')) {
+      return false;
+    }
+  }
+  return true;
+}
+
 ParametersPlugin_ExpressionValidator::ParametersPlugin_ExpressionValidator()
 {
 
diff --git a/src/ParametersPlugin/ParametersPlugin_Validators.h b/src/ParametersPlugin/ParametersPlugin_Validators.h
index 3a4db55c8..be8f285b5 100644
--- a/src/ParametersPlugin/ParametersPlugin_Validators.h
+++ b/src/ParametersPlugin/ParametersPlugin_Validators.h
@@ -13,7 +13,6 @@
 
 #include <ModelAPI_AttributeValidator.h>
 
-#include <regex>
 #include <memory>
 
 class ParametersPlugin_VariableValidator : public ModelAPI_AttributeValidator
@@ -28,8 +27,9 @@ class ParametersPlugin_VariableValidator : public ModelAPI_AttributeValidator
   PARAMETERSPLUGIN_EXPORT virtual bool isValid(const AttributePtr& theAttribute,
                                                const std::list<std::string>& theArguments) const;
 
- private:
-  std::regex myPyVariableRegex;
+ protected:
+  PARAMETERSPLUGIN_EXPORT bool isVariable(const std::string& theString) const;
+
 };
 
 class ParametersPlugin_ExpressionValidator: public ModelAPI_AttributeValidator
-- 
2.39.2