sync (#5)

* Documentation fixes (#34)

Fixing typos in and clarifying documentation.

* MathExecutor allow override default operators, functions and vars (#36)

* Added simple coc (#37)

* Added simple coc

* Fix

* Replaceable operators (#38)

* Updated from NeonXP/MathExecutor

* Fixed function in () block issue

* Fixing typos in and clarifying documentation.

* Syncing from origin (#3)

* Documentation fixes (#34)

Fixing typos in and clarifying documentation.

* MathExecutor allow override default operators, functions and vars (#36)

* Allow for operators to be replaced based on regex expression

* Fix md typo (#39)

* Updated from NeonXP/MathExecutor

* Fixed function in () block issue

* Fixing typos in and clarifying documentation.

* Syncing from origin (#3)

* Documentation fixes (#34)

Fixing typos in and clarifying documentation.

* MathExecutor allow override default operators, functions and vars (#36)

* Syncing to origin (#4)

* Documentation fixes (#34)

Fixing typos in and clarifying documentation.

* MathExecutor allow override default operators, functions and vars (#36)

* Added simple coc (#37)

* Added simple coc

* Fix

* Replaceable operators (#38)

* Updated from NeonXP/MathExecutor

* Fixed function in () block issue

* Fixing typos in and clarifying documentation.

* Syncing from origin (#3)

* Documentation fixes (#34)

Fixing typos in and clarifying documentation.

* MathExecutor allow override default operators, functions and vars (#36)

* Allow for operators to be replaced based on regex expression

* \\ instead of \

* Update README.md

Some small fixes

* Fix single quotes parsing (#41)

* Fix single quotes parsing
Fix e-mails
Some small fixes

* Mistake in test

* More PHP versions

* Update README.md

Deleted `dev` branch

18 files changed, 43 insertions, 17 deletions

diff --git a/src/NXP/Classes/Token/AbstractContainerToken.php b/src/NXP/Classes/Token/AbstractContainerToken.php
index 12d49d2..be2da5f 100644
--- a/src/NXP/Classes/Token/AbstractContainerToken.php
+++ b/src/NXP/Classes/Token/AbstractContainerToken.php
@@ -11,7 +11,7 @@
 namespace NXP\Classes\Token;
 
 /**
- * @author Alexander Kiryukhin <alexander@symdev.org>
+ * @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
  */
 abstract class AbstractContainerToken implements InterfaceToken
 {
diff --git a/src/NXP/Classes/Token/AbstractOperator.php b/src/NXP/Classes/Token/AbstractOperator.php
index 87634d5..8b23ad8 100644
--- a/src/NXP/Classes/Token/AbstractOperator.php
+++ b/src/NXP/Classes/Token/AbstractOperator.php
@@ -11,7 +11,7 @@
 namespace NXP\Classes\Token;
 
 /**
- * @author Alexander Kiryukhin <alexander@symdev.org>
+ * @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
  */
 abstract class AbstractOperator implements InterfaceToken, InterfaceOperator
 {
diff --git a/src/NXP/Classes/Token/InterfaceFunction.php b/src/NXP/Classes/Token/InterfaceFunction.php
index be867b0..a457d0e 100644
--- a/src/NXP/Classes/Token/InterfaceFunction.php
+++ b/src/NXP/Classes/Token/InterfaceFunction.php
@@ -11,7 +11,7 @@
 namespace NXP\Classes\Token;
 
 /**
- * @author Alexander Kiryukhin <alexander@symdev.org>
+ * @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
  */
 interface InterfaceFunction
 {
diff --git a/src/NXP/Classes/Token/InterfaceOperator.php b/src/NXP/Classes/Token/InterfaceOperator.php
index da6cdf0..9e3bae1 100644
--- a/src/NXP/Classes/Token/InterfaceOperator.php
+++ b/src/NXP/Classes/Token/InterfaceOperator.php
@@ -11,7 +11,7 @@
 namespace NXP\Classes\Token;
 
 /**
- * @author Alexander Kiryukhin <alexander@symdev.org>
+ * @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
  */
 interface InterfaceOperator
 {
diff --git a/src/NXP/Classes/Token/InterfaceToken.php b/src/NXP/Classes/Token/InterfaceToken.php
index 86fec91..db07aeb 100644
--- a/src/NXP/Classes/Token/InterfaceToken.php
+++ b/src/NXP/Classes/Token/InterfaceToken.php
@@ -11,7 +11,7 @@
 namespace NXP\Classes\Token;
 
 /**
- * @author Alexander Kiryukhin <alexander@symdev.org>
+ * @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
  */
 interface InterfaceToken
 {
diff --git a/src/NXP/Classes/Token/TokenComma.php b/src/NXP/Classes/Token/TokenComma.php
index f590e32..6a45595 100644
--- a/src/NXP/Classes/Token/TokenComma.php
+++ b/src/NXP/Classes/Token/TokenComma.php
@@ -11,7 +11,7 @@
 namespace NXP\Classes\Token;
 
 /**
- * @author Alexander Kiryukhin <alexander@symdev.org>
+ * @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
  */
 class TokenComma implements InterfaceToken
 {
diff --git a/src/NXP/Classes/Token/TokenDegree.php b/src/NXP/Classes/Token/TokenDegree.php
index 3eec23d..273183a 100644
--- a/src/NXP/Classes/Token/TokenDegree.php
+++ b/src/NXP/Classes/Token/TokenDegree.php
@@ -13,7 +13,7 @@ namespace NXP\Classes\Token;
 use NXP\Exception\IncorrectExpressionException;
 
 /**
-* @author Alexander Kiryukhin <alexander@symdev.org>
+* @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
 */
 class TokenDegree extends AbstractOperator
 {
diff --git a/src/NXP/Classes/Token/TokenDivision.php b/src/NXP/Classes/Token/TokenDivision.php
index 9166d34..4a8f8ce 100644
--- a/src/NXP/Classes/Token/TokenDivision.php
+++ b/src/NXP/Classes/Token/TokenDivision.php
@@ -14,7 +14,7 @@ use NXP\Exception\IncorrectExpressionException;
 use NXP\Exception\DivisionByZeroException;
 
 /**
-* @author Alexander Kiryukhin <alexander@symdev.org>
+* @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
 */
 class TokenDivision extends AbstractOperator
 {
diff --git a/src/NXP/Classes/Token/TokenFunction.php b/src/NXP/Classes/Token/TokenFunction.php
index 2ed8ace..b2866c3 100644
--- a/src/NXP/Classes/Token/TokenFunction.php
+++ b/src/NXP/Classes/Token/TokenFunction.php
@@ -11,7 +11,7 @@
 namespace NXP\Classes\Token;
 
 /**
- * @author Alexander Kiryukhin <alexander@symdev.org>
+ * @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
  */
 class TokenFunction extends AbstractContainerToken implements InterfaceFunction
 {
diff --git a/src/NXP/Classes/Token/TokenLeftBracket.php b/src/NXP/Classes/Token/TokenLeftBracket.php
index 0cfdc1a..08165d8 100644
--- a/src/NXP/Classes/Token/TokenLeftBracket.php
+++ b/src/NXP/Classes/Token/TokenLeftBracket.php
@@ -11,7 +11,7 @@
 namespace NXP\Classes\Token;
 
 /**
- * @author Alexander Kiryukhin <alexander@symdev.org>
+ * @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
  */
 class TokenLeftBracket implements InterfaceToken
 {
diff --git a/src/NXP/Classes/Token/TokenMinus.php b/src/NXP/Classes/Token/TokenMinus.php
index 566c950..ad0b8e5 100644
--- a/src/NXP/Classes/Token/TokenMinus.php
+++ b/src/NXP/Classes/Token/TokenMinus.php
@@ -13,7 +13,7 @@ namespace NXP\Classes\Token;
 use NXP\Exception\IncorrectExpressionException;
 
 /**
-* @author Alexander Kiryukhin <alexander@symdev.org>
+* @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
 */
 class TokenMinus extends AbstractOperator
 {
diff --git a/src/NXP/Classes/Token/TokenMultiply.php b/src/NXP/Classes/Token/TokenMultiply.php
index 8b173b9..0b1ecfb 100644
--- a/src/NXP/Classes/Token/TokenMultiply.php
+++ b/src/NXP/Classes/Token/TokenMultiply.php
@@ -13,7 +13,7 @@ namespace NXP\Classes\Token;
 use NXP\Exception\IncorrectExpressionException;
 
 /**
-* @author Alexander Kiryukhin <alexander@symdev.org>
+* @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
 */
 class TokenMultiply extends AbstractOperator
 {
diff --git a/src/NXP/Classes/Token/TokenNumber.php b/src/NXP/Classes/Token/TokenNumber.php
index a7eac57..982e316 100644
--- a/src/NXP/Classes/Token/TokenNumber.php
+++ b/src/NXP/Classes/Token/TokenNumber.php
@@ -11,7 +11,7 @@
 namespace NXP\Classes\Token;
 
 /**
- * @author Alexander Kiryukhin <alexander@symdev.org>
+ * @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
  */
 class TokenNumber extends AbstractContainerToken
 {
diff --git a/src/NXP/Classes/Token/TokenPlus.php b/src/NXP/Classes/Token/TokenPlus.php
index fe5a1d6..a6e5036 100644
--- a/src/NXP/Classes/Token/TokenPlus.php
+++ b/src/NXP/Classes/Token/TokenPlus.php
@@ -13,7 +13,7 @@ namespace NXP\Classes\Token;
 use NXP\Exception\IncorrectExpressionException;
 
 /**
-* @author Alexander Kiryukhin <alexander@symdev.org>
+* @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
 */
 class TokenPlus extends AbstractOperator
 {
diff --git a/src/NXP/Classes/Token/TokenRightBracket.php b/src/NXP/Classes/Token/TokenRightBracket.php
index c68473a..306ae0b 100644
--- a/src/NXP/Classes/Token/TokenRightBracket.php
+++ b/src/NXP/Classes/Token/TokenRightBracket.php
@@ -11,7 +11,7 @@
 namespace NXP\Classes\Token;
 
 /**
- * @author Alexander Kiryukhin <alexander@symdev.org>
+ * @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
  */
 class TokenRightBracket implements InterfaceToken
 {
diff --git a/src/NXP/Classes/Token/TokenString.php b/src/NXP/Classes/Token/TokenStringDoubleQuoted.php
index cab0711..6cff262 100644
--- a/src/NXP/Classes/Token/TokenString.php
+++ b/src/NXP/Classes/Token/TokenStringDoubleQuoted.php
@@ -13,7 +13,7 @@ namespace NXP\Classes\Token;
 /**
  * @author Bruce Wells <brucekwells@gmail.com>
  */
-class TokenString extends AbstractContainerToken
+class TokenStringDoubleQuoted extends AbstractContainerToken
 {
     /**
      * @return string
diff --git a/src/NXP/Classes/Token/TokenStringSingleQuoted.php b/src/NXP/Classes/Token/TokenStringSingleQuoted.php
new file mode 100644
index 0000000..7a7ab92
--- /dev/null
+++ b/src/NXP/Classes/Token/TokenStringSingleQuoted.php
@@ -0,0 +1,26 @@
+<?php
+/**
+ * This file is part of the MathExecutor package
+ *
+ * (c) Alexander Kiryukhin
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code
+ */
+
+namespace NXP\Classes\Token;
+
+/**
+ * @author Bruce Wells <brucekwells@gmail.com>
+ * @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
+ */
+class TokenStringSingleQuoted extends AbstractContainerToken
+{
+    /**
+     * @return string
+     */
+    public static function getRegex()
+    {
+        return "'([^']|'')*'";
+    }
+}
diff --git a/src/NXP/Classes/Token/TokenVariable.php b/src/NXP/Classes/Token/TokenVariable.php
index ccd7c83..a4a820a 100644
--- a/src/NXP/Classes/Token/TokenVariable.php
+++ b/src/NXP/Classes/Token/TokenVariable.php
@@ -11,7 +11,7 @@
 namespace NXP\Classes\Token;
 
 /**
- * @author Alexander Kiryukhin <alexander@symdev.org>
+ * @author Alexander Kiryukhin <a.kiryukhin@mail.ru>
  */
 class TokenVariable extends AbstractContainerToken
 {