# Documentation for using the modern fortran parser

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## Get the code
  The parser uses a modified libfdf library. This is included in this repository as a submodule. To clone the project, do


  `git clone --recurse-submodules https://github.com/TREX-CoE/iof08.git`


## Compilation



## Integrate parser in your code



### Features of the parser (including inheritance from libfdf)

- Include another input file for parser to read using:

` %include    global.inp`

- Include a data file for parser to read using:

` load label filename`

Here, depending upon the label, parser will provide the filename. For example,

` load basis cc-pvtz.gbs`

- Read molecular coordinates directly from the input file using 

```perl
%block molecule 
12
 #benzene comment
 C    0.00000    1.40272  0
 H    0.00000    2.49029  0
 C   -1.21479    0.70136  0
 H   -2.15666    1.24515  0
 C   -1.21479   -0.70136  0
 H   -2.15666   -1.24515  0
 C    0.00000   -1.40272  0
 H    0.00000   -2.49029  0
 C    1.21479   -0.70136  0
 H    2.15666   -1.24515  0
 C    1.21479    0.70136  0
 H    2.15666    1.24515  0
%endblock
```

- Read molecular coordinates from an external .xyz file using 

` %block molecule < caffeine.xyz `


- Group certain keywords using the %module construct

```perl
%module DMC
    tau     =   0.04
    etrial  = -15 Ha
%endmodule
```

- Logical variables accept true, TRUE, T, 1, .true. as valid keywords for true
` optimize_wavefunction 	true`




**bold text**

### Italic

*italicized text*

### Blockquote

> blockquote

### Ordered List

1. First item
2. Second item
3. Third item

### Unordered List

- First item
- Second item
- Third item

### Code

`code`

### Horizontal Rule

---

### Link

[title](https://www.example.com)

### Image

![alt text](image.jpg)

## Extended Syntax

These elements extend the basic syntax by adding additional features. Not all Markdown applications support these elements.

### Table

| Syntax | Description |
| ----------- | ----------- |
| Header | Title |
| Paragraph | Text |

### Fenced Code Block

```
{
  "firstName": "John",
  "lastName": "Smith",
  "age": 25
}
```

### Footnote

Here's a sentence with a footnote. [^1]

[^1]: This is the footnote.

### Heading ID

### My Great Heading {#custom-id}

### Definition List

term
: definition

### Strikethrough

~~The world is flat.~~

### Task List

- [x] Write the press release
- [ ] Update the website
- [ ] Contact the media