WIP

This is nice for deployments

base/src/expressions/parser/mod.rs

@@ -717,7 +717,7 @@ impl Parser {
                         return Node::ParseErrorKind {
                             formula: self.lexer.get_formula(),
                             position: 0,
-                            message: "sheet not found".to_string(),
+                            message: format!("sheet not found: {}", context.sheet),
                         };
                     }
                 };
@@ -850,7 +850,7 @@ impl Parser {
                         return Node::ParseErrorKind {
                             formula: self.lexer.get_formula(),
                             position: 0,
-                            message: "sheet not found".to_string(),
+                            message: format!("sheet not found: {}", context.sheet),
                         };
                     }
                 };
@@ -878,7 +878,7 @@ impl Parser {
                         return Node::ParseErrorKind {
                             formula: self.lexer.get_formula(),
                             position: 0,
-                            message: "sheet not found".to_string(),
+                            message: format!("table sheet not found: {}", table.sheet_name),
                         };
                     }
                 };

base/src/functions/logical.rs

@@ -246,7 +246,7 @@ impl Model {
         }
         // None of the cases matched so we return the default
         // If there is an even number of args is the last one otherwise is #N/A
-        if args_count % 2 == 0 {
+        if args_count.is_multiple_of(2) {
             return self.evaluate_node_in_context(&args[args_count - 1], cell);
         }
         CalcResult::Error {
@@ -262,7 +262,7 @@ impl Model {
         if args_count < 2 {
             return CalcResult::new_args_number_error(cell);
         }
-        if args_count % 2 != 0 {
+        if !args_count.is_multiple_of(2) {
             // Missing value for last condition
             return CalcResult::new_args_number_error(cell);
         }

base/src/functions/statistical.rs

@@ -350,7 +350,7 @@ impl Model {
     // FIXME: This function shares a lot of code with apply_ifs. Can we merge them?
     pub(crate) fn fn_countifs(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
         let args_count = args.len();
-        if args_count < 2 || args_count % 2 == 1 {
+        if args_count < 2 || !args_count.is_multiple_of(2) {
             return CalcResult::new_args_number_error(cell);
         }
 
@@ -476,7 +476,7 @@ impl Model {
         F: FnMut(f64),
     {
         let args_count = args.len();
-        if args_count < 3 || args_count % 2 == 0 {
+        if args_count < 3 || args_count.is_multiple_of(2) {
             return Err(CalcResult::new_args_number_error(cell));
         }
         let arg_0 = self.evaluate_node_in_context(&args[0], cell);

bindings/nodejs/README.md

@@ -4,15 +4,20 @@
 Example usage:
 
 ```javascript
-import { Model } from '@ironcalc/wasm';
+import { Model } from '@ironcalc/nodejs';
  
 const model = new Model("Workbook1", "en", "UTC");
 
 model.setUserInput(0, 1, 1, "=1+1");
-const result1 = model.getFormattedCellValue(0, 1, 1);
 
-console.log('Cell value', result1);
+const result1 = model.getFormattedCellValue(0, 1, 1);
+console.log('Cell value', result1); // "#ERROR"
+
+model.evaluate();
+
+const resultAfterEvaluate = model.getFormattedCellValue(0, 1, 1);
+console.log('Cell value', resultAfterEvaluate); // 2
 
 let result2 = model.getCellStyle(0, 1, 1);
 console.log('Cell style', result2);
-```
+```

docs/src/features/value-types.md

@@ -66,4 +66,8 @@ Using IronCalc, a complex number is a string of the form "1+j3".
 
 "#N/A" => #N/A
 
-## Arrays
+## Arrays
+
+## References
+
+A reference is a pointer to a single cell or a range of cells. The reference can either be entered manually, for example "A4", or as the result of a calculation, such as the OFFSET Function or the INDIRECT Function. A reference can also be built, for example with the Colon (\:) Operator. 

docs/src/functions/lookup-and-reference.md

@@ -16,7 +16,7 @@ You can track the progress in this [GitHub issue](https://github.com/ironcalc/Ir
 | CHOOSE       | <Badge type="tip" text="Available" />          | –             |
 | CHOOSECOLS   | <Badge type="info" text="Not implemented yet" /> | –             |
 | CHOOSEROWS   | <Badge type="info" text="Not implemented yet" /> | –             |
-| COLUMN       | <Badge type="tip" text="Available" />          | –             |
+| COLUMN       | <Badge type="tip" text="Available" />          | [COLUMN](lookup_and_reference/column)             |
 | COLUMNS      | <Badge type="tip" text="Available" />          | –             |
 | DROP         | <Badge type="info" text="Not implemented yet" /> | –             |
 | EXPAND       | <Badge type="info" text="Not implemented yet" /> | –             |

docs/src/functions/lookup_and_reference/column.md

@@ -4,8 +4,28 @@ outline: deep
 lang: en-US
 ---
 
-# COLUMN
-
-::: warning
-🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
-:::
+# COLUMN function
+## Overview
+The COLUMN Function in IronCalc is a lookup & reference formula that is used to query and return the column number of a referenced Column or Cell.
+## Usage
+### Syntax
+**COLUMN(<span title="Reference" style="color:#1E88E5">reference</span>) => <span title="Number" style="color:#1E88E5">column</span>**
+### Argument descriptions
+* *reference* ([cell](/features/value-types#references), [optional](/features/optional-arguments.md)). The number of the cell you wish to reference the column number of.
+### Additional guidance
+* When referencing a range of cells, only the column number of the left most cell will be returned.
+* You are also able to reference complete columns instead of individual cells.
+### Returned value
+COLUMN returns the [number](/features/value-types#numbers) of the specific cell or column which is being referenced.
+### Error conditions
+* IronCalc currently does not support the referencing of cells with names.
+## Details
+The COLUMN Function can only be used to display the correlating number of a single column within a Sheet. If you wish to show the number of columns used within a specific range, you can use the COLUMNS Function.
+## Examples
+### No Cell Reference
+When no cell reference is made, the formula uses **=COLUMN()**. This will then output the column number of the cell where the formula is placed.<br><br>For example, if the formula is placed in cell A1, then "1" will be displayed.
+### With Cell Reference
+When a cell reference is made, the formula uses **=COLUMN([Referenced Cell])**. This will then output the column number of the referenced cell, regardless of where the formula is placed in the sheet.<br><br>For example, if the cell B1 is the referenced cell, "2" will be the output of the formula no matter where it is placed in the sheet.<br><br>**Note:** references do not always have to be specific cells, you can also reference complete columns. For example, **=COLUMN(B:B)** would also result in an output of "2".
+### Range References
+The COLUMN function can also be used to reference a range of Cells or Columns. In this case only the most left-hand column will be the resulting output.<br><br>For example, **=COLUMN(A1:J1)** will result in the ouput of "1".
+## Links

docs/src/functions/math-and-trigonometry.md

@@ -13,16 +13,16 @@ You can track the progress in this [GitHub issue](https://github.com/ironcalc/Ir
 | --------------- | ---------------------------------------------- | ------------- |
 | ABS             | <Badge type="tip" text="Available" />          | –             |
 | ACOS            | <Badge type="tip" text="Available" />          | [ACOS](math_and_trigonometry/acos) |
-| ACOSH           | <Badge type="tip" text="Available" />          | –             |
+| ACOSH           | <Badge type="tip" text="Available" />          | [ACOSH](math_and_trigonometry/acosh) |
 | ACOT            | <Badge type="info" text="Not implemented yet" /> | –             |
 | ACOTH           | <Badge type="info" text="Not implemented yet" /> | –             |
 | AGGREGATE       | <Badge type="info" text="Not implemented yet" /> | –             |
 | ARABIC          | <Badge type="info" text="Not implemented yet" /> | –             |
 | ASIN            | <Badge type="tip" text="Available" />          | [ASIN](math_and_trigonometry/asin) |
-| ASINH           | <Badge type="tip" text="Available" />          | –             |
+| ASINH           | <Badge type="tip" text="Available" />          | [ASINH](math_and_trigonometry/asinh) |
 | ATAN            | <Badge type="tip" text="Available" />          | [ATAN](math_and_trigonometry/atan) |
-| ATAN2           | <Badge type="tip" text="Available" />          | –             |
-| ATANH           | <Badge type="tip" text="Available" />          | –             |
+| ATAN2           | <Badge type="tip" text="Available" />          | [ATAN2](math_and_trigonometry/atan2) |
+| ATANH           | <Badge type="tip" text="Available" />          | [ATANH](math_and_trigonometry/atanh) |
 | BASE            | <Badge type="info" text="Not implemented yet" /> | –             |
 | CEILING         | <Badge type="info" text="Not implemented yet" /> | –             |
 | CEILING.MATH    | <Badge type="info" text="Not implemented yet" /> | –             |
@@ -49,9 +49,9 @@ You can track the progress in this [GitHub issue](https://github.com/ironcalc/Ir
 | ISO.CEILING     | <Badge type="info" text="Not implemented yet" /> | –             |
 | LCM             | <Badge type="info" text="Not implemented yet" /> | –             |
 | LET             | <Badge type="info" text="Not implemented yet" /> | –             |
-| LN              | <Badge type="info" text="Not implemented yet" /> | –             |
-| LOG             | <Badge type="info" text="Not implemented yet" /> | –             |
-| LOG10           | <Badge type="info" text="Not implemented yet" /> | –             |
+| LN              | <Badge type="info" text="Available" />           | –             |
+| LOG             | <Badge type="info" text="Available" />           | –             |
+| LOG10           | <Badge type="info" text="Available" />           | –             |
 | MDETERM         | <Badge type="info" text="Not implemented yet" /> | –             |
 | MINVERSE        | <Badge type="info" text="Not implemented yet" /> | –             |
 | MMULT           | <Badge type="info" text="Not implemented yet" /> | –             |
@@ -80,11 +80,11 @@ You can track the progress in this [GitHub issue](https://github.com/ironcalc/Ir
 | SIN             | <Badge type="tip" text="Available" />          | [SIN](math_and_trigonometry/sin) |
 | SINH            | <Badge type="tip" text="Available" />          | [SINH](math_and_trigonometry/sinh) |
 | SQRT            | <Badge type="tip" text="Available" />          | –             |
-| SQRTPI          | <Badge type="info" text="Not implemented yet" /> | –             |
+| SQRTPI          | <Badge type="info" text="Available" />         | –             |
 | SUBTOTAL        | <Badge type="info" text="Not implemented yet" /> | –             |
 | SUM             | <Badge type="tip" text="Available" />          | –             |
 | SUMIF           | <Badge type="tip" text="Available" />          | –             |
-| SUMIFS          | <Badge type="info" text="Not implemented yet" /> | –             |
+| SUMIFS          | <Badge type="info" text="Available" />         | –             |
 | SUMPRODUCT      | <Badge type="info" text="Not implemented yet" /> | –             |
 | SUMSQ           | <Badge type="info" text="Not implemented yet" /> | –             |
 | SUMX2MY2        | <Badge type="info" text="Not implemented yet" /> | –             |

docs/src/functions/math_and_trigonometry/acosh.md

@@ -3,9 +3,40 @@ layout: doc
 outline: deep
 lang: en-US
 ---
+# ACOSH function
+## Overview
+ACOSH is a function of the Math and Trigonometry category that calculates the inverse hyperbolic cosine (hyperbolic arccosine) of a number, returning a non-negative value in the range [0, +∞).
+## Usage
+### Syntax
+**ACOSH(<span title="Number" style="color:#1E88E5">number</span>) => <span title="Number" style="color:#1E88E5">acosh</span>**
+### Argument descriptions
+* *number* ([number](/features/value-types#numbers), required). The value whose hyperbolic arccosine is to be calculated. The value must be greater than or equal to 1.
 
-# ACOSH
+### Additional guidance
+The hyperbolic arccosine function is defined as:
 
-::: warning
-🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
-:::
+$$
+\operatorname{acosh}(x) = \ln(x + \sqrt{x^2 - 1})
+$$
+
+### Returned value
+ACOSH returns a [number](/features/value-types#numbers) in the range [0, +∞) that is the hyperbolic arccosine of the specified value, expressed in radians.
+### Error conditions
+* In common with many other IronCalc functions, ACOSH propagates errors that are found in its argument.
+* If no argument, or more than one argument, is supplied, then ACOSH returns the [`#ERROR!`](/features/error-types.md#error) error.
+* If the value of the *number* argument is not (or cannot be converted to) a [number](/features/value-types#numbers), then ACOSH returns the [`#VALUE!`](/features/error-types.md#value) error.
+* If the value of the *number* argument is less than 1, then ACOSH returns the [`#NUM!`](/features/error-types.md#num) error.
+<!--@include: ../markdown-snippets/error-type-details.txt-->
+## Details
+* The ACOSH function utilizes the *acosh()* method provided by the [Rust Standard Library](https://doc.rust-lang.org/std/).
+* The figure below illustrates the output of the ACOSH function for values $x \geq 1$ in the range [0, +∞).
+<center><img src="/functions/images/hyperbolicarccosine-curve.png" width="350" alt="Graph showing acosh(x) for x ≥ 1."></center>
+
+## Examples
+[See some examples in IronCalc](https://app.ironcalc.com/?example=acosh).
+
+## Links
+* For more information about inverse hyperbolic functions, visit Wikipedia's [Inverse hyperbolic functions](https://en.wikipedia.org/wiki/Inverse_hyperbolic_functions) page.
+* See also IronCalc's [COSH](/functions/math_and_trigonometry/cosh), [ASINH](/functions/math_and_trigonometry/asinh) and [ATANH](/functions/math_and_trigonometry/atanh) functions.
+* Visit Microsoft Excel's [ACOSH function](https://support.microsoft.com/en-us/office/acosh-function-e3992cc1-103f-4e72-9f04-624b9ef5ebfe) page.
+* Both [Google Sheets](https://support.google.com/docs/answer/3093391) and [LibreOffice Calc](https://wiki.documentfoundation.org/Documentation/Calc_Functions/ACOSH) provide versions of the ACOSH function.

docs/src/functions/math_and_trigonometry/asinh.md

@@ -4,8 +4,36 @@ outline: deep
 lang: en-US
 ---
 
-# ASINH
+# ASINH function
+## Overview
+ASINH is a function of the Math and Trigonometry category that calculates the inverse hyperbolic sine (hyperbolic arcsine) of a number, returning the hyperbolic angle expressed in radians.
+## Usage
+### Syntax
+**ASINH(<span title="Number" style="color:#1E88E5">number</span>) => <span title="Number" style="color:#1E88E5">asinh</span>**
+### Argument descriptions
+* *number* ([number](/features/value-types#numbers), required). The value whose inverse hyperbolic sine is to be calculated. 
+### Additional guidance
+The hyperbolic arcsine function is defined as:
+$$
+\operatorname{asinh}(x) = \ln\!\left(x + \sqrt{x^2 + 1}\,\right)
+$$
+### Returned value
+ASINH returns a real [number](/features/value-types#numbers) in the range (-∞, +∞) that is the hyperbolic arcsine of the specified value, expressed in radians.
+### Error conditions
+* In common with many other IronCalc functions, ASINH propagates errors that are found in its argument.
+* If no argument, or more than one argument, is supplied, then ASINH returns the [`#ERROR!`](/features/error-types.md#error) error.
+* If the value of the *number* argument is not (or cannot be converted to) a [number](/features/value-types#numbers), then ASINH returns the [`#VALUE!`](/features/error-types.md#value) error.
+<!--@include: ../markdown-snippets/error-type-details.txt-->
+## Details
+* The ASINH function utilizes the *asinh()* method provided by the [Rust Standard Library](https://doc.rust-lang.org/std/).
+* The figure below illustrates the output of the ASINH function.
+<center><img src="/functions/images/hyperbolicarcsine-curve.png" width="350" alt="Graph showing asinh(x)."></center>
 
-::: warning
-🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
-:::
+## Examples
+[See some examples in IronCalc](https://app.ironcalc.com/?example=asinh).
+
+## Links
+* For more information about inverse hyperbolic functions, visit Wikipedia's [Inverse hyperbolic functions](https://en.wikipedia.org/wiki/Inverse_hyperbolic_functions) page.
+* See also IronCalc's [SINH](/functions/math_and_trigonometry/sinh), [ACOSH](/functions/math_and_trigonometry/acosh) and [ATANH](/functions/math_and_trigonometry/atanh) functions.
+* Visit Microsoft Excel's [ASINH function](https://support.microsoft.com/de-de/office/asinh-function-62b4f5b6-d9cc-4c17-9d04-aa5371806c74) page.
+* Both [Google Sheets](https://support.google.com/docs/answer/3093393) and [LibreOffice Calc](https://wiki.documentfoundation.org/Documentation/Calc_Functions/ASINH) provide versions of the ASINH function.

docs/src/functions/math_and_trigonometry/atan2.md

@@ -4,8 +4,34 @@ outline: deep
 lang: en-US
 ---
 
-# ATAN2
+# ATAN2 function
+## Overview
+ATAN2 is a function of the Math and Trigonometry category that calculates the inverse tangent (arctangent) for the specified *x* and *y* coordinates. The arctangent returns the angle defined by the x-axis and a line defined by the origin and a point with coordinates (x,y). The returned angle is expressed in radians, in the range (-$\pi$, +$\pi$].
+## Usage
+### Syntax
+**ATAN2(<span title="Number" style="color:#1E88E5">x,y</span>) => <span title="Number" style="color:#1E88E5">atan2</span>**
+### Argument descriptions
+* *x* ([number](/features/value-types#numbers), required). Value of the x coordinate.
+* *y* ([number](/features/value-types#numbers), required). Value of the y coordinate.
+### Additional guidance
+If the returned value is positive, it represents a counterclockwise angle from the x-axis, while a negative value represents a clockwise angle.  
+ATAN2(x,y) is equivalent to ATAN(y/x), with the difference that the x argument in ATAN2 can be 0.
+### Returned value
+ATAN2 returns a number in radians in the range (-$\pi$, +$\pi$] that is the inverse tangent for the specified x and y coordinates.
+### Error conditions
+* In common with many other IronCalc functions, ATAN2 propagates errors that are found in its argument.
+* If no argument, or arguments other than 2, are supplied, then ATAN2 returns the [`#ERROR!`](/features/error-types.md#error) error.
+* If the value of either the *x* or *y* argument is not (or cannot be converted to) a [number](/features/value-types#numbers), then ATAN2 returns the [`#VALUE!`](/features/error-types.md#value) error.
+* If both *x* and *y* are equal to 0, ATAN2 returns a [`#DIV/0!`](/features/error-types.md#div-0) error.
+<!--@include: ../markdown-snippets/error-type-details.txt-->
+## Details
+* The ATAN2 function utilizes the *atan2()* method provided by the [Rust Standard Library](https://doc.rust-lang.org/std/).
+## Examples
+[See some examples in IronCalc](https://app.ironcalc.com/?example=atan2).
+
+## Links
+* For more information about inverse trigonometric functions, visit Wikipedia's [Inverse trigonometric functions](https://en.wikipedia.org/wiki/Inverse_trigonometric_functions) page.
+* See also IronCalc's [ATAN](/functions/math_and_trigonometry/atan), [TAN](/functions/math_and_trigonometry/tan) and [ASIN](/functions/math_and_trigonometry/asin) functions.
+* Visit Microsoft Excel's [ATAN2 function](https://support.microsoft.com/en-us/office/atan2-function-51123ced-348c-416a-b2e2-833f7868569f) page.
+* Both [Google Sheets](https://support.google.com/docs/answer/3093468) and [LibreOffice Calc](https://wiki.documentfoundation.org/Documentation/Calc_Functions/ATAN2) provide versions of the ATAN2 function.
 
-::: warning
-🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
-:::

docs/src/functions/math_and_trigonometry/atanh.md

@@ -4,8 +4,37 @@ outline: deep
 lang: en-US
 ---
 
-# ATANH
+# ATANH function
+## Overview
+ATANH is a function of the Math and Trigonometry category that calculates the inverse hyperbolic tangent (hyperbolic arctangent) of a number in the range (-1, +1), returning the hyperbolic angle expressed in radians.
+## Usage
+### Syntax
+**ATANH(<span title="Number" style="color:#1E88E5">number</span>) => <span title="Number" style="color:#1E88E5">atanh</span>**
+### Argument descriptions
+* *number* ([number](/features/value-types#numbers), required). The value whose inverse hyperbolic tangent is to be calculated, in the range (-1,+1).
+### Additional guidance
+The hyperbolic arctangent function is defined as:
+$$
+\operatorname{atanh}(x) = \tfrac{1}{2}\,\ln\!\left(\dfrac{1+x}{1-x}\right),\quad |x| < 1
+$$
+### Returned value
+ATANH returns a real [number](/features/value-types#numbers) in the range (-∞, +∞) that is the hyperbolic arctangent of the specified value, expressed in radians.
+### Error conditions
+* In common with many other IronCalc functions, ATANH propagates errors that are found in its argument.
+* If no argument, or more than one argument, is supplied, then ATANH returns the [`#ERROR!`](/features/error-types.md#error) error.
+* If the value of the *number* argument is not (or cannot be converted to) a [number](/features/value-types#numbers), then ATANH returns the [`#VALUE!`](/features/error-types.md#value) error.
+* If the value of the *number* argument lies outside the domain (-1, +1), then ATANH returns the [`#NUM!`](/features/error-types.md#num) error.
+<!--@include: ../markdown-snippets/error-type-details.txt-->
+## Details
+* The ATANH function utilizes the *atanh()* method provided by the [Rust Standard Library](https://doc.rust-lang.org/std/).
+* The figure below illustrates the output of the ATANH function.
+<center><img src="/functions/images/hyperbolicarctangent-curve.png" width="350" alt="Graph showing atanh(x)."></center>
 
-::: warning
-🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
-:::
+## Examples
+[See some examples in IronCalc](https://app.ironcalc.com/?example=atanh).
+
+## Links
+* For more information about inverse hyperbolic functions, visit Wikipedia's [Inverse hyperbolic functions](https://en.wikipedia.org/wiki/Inverse_hyperbolic_functions) page.
+* See also IronCalc's [ASINH](/functions/math_and_trigonometry/asinh), [ACOSH](/functions/math_and_trigonometry/acosh) and [TANH](/functions/math_and_trigonometry/tanh) functions.
+* Visit Microsoft Excel's [ATANH function](https://support.microsoft.com/de-de/office/atanh-function-453534d1-76a5-4f17-8c04-c3f2feee0dd5) page.
+* Both [Google Sheets](https://support.google.com/docs/answer/3093397) and [LibreOffice Calc](https://wiki.documentfoundation.org/Documentation/Calc_Functions/ATANH) provide versions of the ATANH function.

docs/src/functions/math_and_trigonometry/ln.md

@@ -7,6 +7,5 @@ lang: en-US
 # LN
 
 ::: warning
-🚧 This function is not yet available in IronCalc.
-[Follow development here](https://github.com/ironcalc/IronCalc/labels/Functions)
+🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
 :::

docs/src/functions/math_and_trigonometry/log.md

@@ -7,6 +7,5 @@ lang: en-US
 # LOG
 
 ::: warning
-🚧 This function is not yet available in IronCalc.
-[Follow development here](https://github.com/ironcalc/IronCalc/labels/Functions)
+🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
 :::

docs/src/functions/math_and_trigonometry/log10.md

@@ -7,6 +7,5 @@ lang: en-US
 # LOG10
 
 ::: warning
-🚧 This function is not yet available in IronCalc.
-[Follow development here](https://github.com/ironcalc/IronCalc/labels/Functions)
+🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
 :::

xlsx/src/bin/xlsx_2_icalc.rs

@@ -7,7 +7,7 @@
 //! This is primary for QA internal testing and will be superseded by an official
 //! IronCalc CLI.
 //!
-//! Usage: test file.xlsx
+//! Usage: test file.xlsx [output.icalc]
 
 use std::path;
 
@@ -15,15 +15,20 @@ use ironcalc::{export::save_to_icalc, import::load_from_xlsx};
 
 fn main() {
     let args: Vec<_> = std::env::args().collect();
-    if args.len() != 2 {
-        panic!("Usage: {} <file.xlsx>", args[0]);
+    if args.len() != 2 && args.len() != 3 {
+        panic!("Usage: {} <file.xlsx> [output.icalc]", args[0]);
     }
     // first test the file
     let file_name = &args[1];
 
-    let file_path = path::Path::new(file_name);
-    let base_name = file_path.file_stem().unwrap().to_str().unwrap();
-    let output_file_name = &format!("{base_name}.ic");
+    let output_file_name = if args.len() == 3 {
+        &args[2]
+    } else {
+        let file_path = path::Path::new(file_name);
+        let base_name = file_path.file_stem().unwrap().to_str().unwrap();
+        &format!("{base_name}.ic")
+    };
+
     let model = load_from_xlsx(file_name, "en", "UTC").unwrap();
     save_to_icalc(&model, output_file_name).unwrap();
 }

xlsx/src/import/worksheets.rs

@@ -264,30 +264,29 @@ enum ParseReferenceError {
 // There is a similar named function in ironcalc_base. We probably should fix both at the same time.
 // NB: Maybe use regexes for this?
 fn parse_reference(s: &str) -> Result<CellReferenceRC, ParseReferenceError> {
-    let bytes = s.as_bytes();
     let mut sheet_name = "".to_string();
     let mut column = "".to_string();
     let mut row = "".to_string();
     let mut state = "sheet"; // "sheet", "col", "row"
-    for &byte in bytes {
+    for ch in s.chars() {
         match state {
             "sheet" => {
-                if byte == b'!' {
+                if ch == '!' {
                     state = "col"
                 } else {
-                    sheet_name.push(byte as char);
+                    sheet_name.push(ch);
                 }
             }
             "col" => {
-                if byte.is_ascii_alphabetic() {
-                    column.push(byte as char);
+                if ch.is_ascii_alphabetic() {
+                    column.push(ch);
                 } else {
                     state = "row";
-                    row.push(byte as char);
+                    row.push(ch);
                 }
             }
             _ => {
-                row.push(byte as char);
+                row.push(ch);
             }
         }
     }
@@ -1126,3 +1125,16 @@ pub(super) fn load_sheets<R: Read + std::io::Seek>(
     }
     Ok((sheets, selected_sheet))
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::import::worksheets::parse_reference;
+
+    #[test]
+    fn parse_reference_works() {
+        let cell_reference = parse_reference("📈 Overview!B2");
+        assert!(cell_reference.is_ok());
+        let cell_reference = cell_reference.unwrap();
+        assert_eq!(cell_reference.sheet, "📈 Overview");
+    }
+}

xlsx/tests/test.rs

@@ -472,6 +472,45 @@ fn test_exporting_merged_cells() {
     fs::remove_file(temp_file_name).unwrap();
 }
 
+#[test]
+fn test_templates_xlsx() {
+    let mut entries = fs::read_dir("tests/templates/")
+        .unwrap()
+        .map(|res| res.map(|e| e.path()))
+        .collect::<Result<Vec<_>, io::Error>>()
+        .unwrap();
+    entries.sort();
+    let temp_folder = env::temp_dir();
+    let path = format!("{}", Uuid::new_v4());
+    let dir = temp_folder.join(path);
+    fs::create_dir(&dir).unwrap();
+    let mut is_error = false;
+    for file_path in entries {
+        let file_name_str = file_path.file_name().unwrap().to_str().unwrap();
+        let file_path_str = file_path.to_str().unwrap();
+        println!("Testing file: {file_path_str}");
+        if file_name_str.ends_with(".xlsx") && !file_name_str.starts_with('~') {
+            if let Err(message) = test_file(file_path_str) {
+                println!("Error with file: '{file_path_str}'");
+                println!("{message}");
+                is_error = true;
+            }
+            let t = test_load_and_saving(file_path_str, &dir);
+            if t.is_err() {
+                println!("Error while load and saving file: {file_path_str}");
+                is_error = true;
+            }
+        } else {
+            println!("skipping");
+        }
+    }
+    fs::remove_dir_all(&dir).unwrap();
+    assert!(
+        !is_error,
+        "Models were evaluated inconsistently with XLSX data."
+    );
+}
+
 #[test]
 fn test_documentation_xlsx() {
     let mut entries = fs::read_dir("tests/docs/")