``` -------------------------------- ### Ordered List with Zero Start Number Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Ordered lists can start with '0'. This is a valid start number. ```markdown 0. ok . ``` ```html

``` -------------------------------- ### Basic HTML Block Type 6 Examples Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Examples of standard HTML block structures using common tags like table and div. ```markdown

okay. .

okay.

``` ```markdown

*hello* .

*hello* ``` -------------------------------- ### Build and Run Quadratic Fuzzer Source: https://github.com/github/cmark-gfm/blob/master/fuzz/README.md Use these commands to build and run the quadratic fuzzer. Ensure you have clang and clang++ installed and set as your C and C++ compilers. ```bash mkdir build-fuzz cd build-fuzz cmake -DCMARK_FUZZ_QUADRATIC=ON -DCMAKE_C_COMPILER=$(which clang) -DCMAKE_CXX_COMPILER=$(which clang++) -DCMAKE_BUILD_TYPE=Release .. make ../fuzz/fuzzloop.sh ``` -------------------------------- ### Table HTML Block Example Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Illustrates an HTML block containing a table structure. ```html

foo

. ``` ```html

foo

``` -------------------------------- ### Markdown to Block Structure Example Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Demonstrates the transformation of Markdown text into a block structure tree. Shows how lines are processed to create and populate blocks like block_quote, list, and paragraph. ```markdown > Lorem ipsum dolor sit amet. > - Qui *quodsi iracundia* > - aliquando id ``` -------------------------------- ### Markdown Emphasis Examples Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Demonstrates various ways to achieve strong emphasis and nested emphasis in Markdown using asterisks and underscores. ```markdown ***strong emph*** ***strong** in emph* ***emph* in strong** **in strong *emph*** *in emph **strong*** ``` ```markdown *emph *with emph* in it* **strong **with strong** in it** ``` ```markdown internal emphasis: foo*bar*baz no emphasis: foo_bar_baz ``` -------------------------------- ### Install cmark-gfm with custom prefix Source: https://github.com/github/cmark-gfm/blob/master/README.md To change the installation prefix when building cmark-gfm using GNU make, pass the INSTALL_PREFIX variable. ```makefile make INSTALL_PREFIX=path ``` -------------------------------- ### Emphasis Delimiter Matching Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Examples demonstrating how underscore and asterisk delimiters are parsed into HTML emphasis tags. ```markdown foo __\___ .

foo _

``` ```markdown foo __*__ .

foo *

``` ```markdown __foo_ .

_foo

``` ```markdown _foo__ .

foo_

``` ```markdown ___foo__ .

_foo

``` ```markdown ____foo_ .

___foo

``` ```markdown __foo___ .

foo_

``` ```markdown _foo____ .

foo___

``` -------------------------------- ### Tilde Code Fence Example Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Demonstrates the use of tildes for code fences, including cases with special characters in the fence. ```markdown ```````````````````````````````` example ~~~~~~ aaa ~~~ ~~ .

aaa
~~~ ~~

```````````````````````````````` ``` -------------------------------- ### Unclosed HTML Tag Example Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Demonstrates an HTML block with an unclosed tag, showing how the content is rendered. ```html

*foo* *bar* . ``` ```html

*foo*

bar

``` -------------------------------- ### Markdown List Starting with Empty Item Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Illustrates a Markdown list that begins with an empty list item. ```markdown * ``` ```html

``` -------------------------------- ### Markdown Example: Paragraph Followed by Nested Sublist Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt This example illustrates a paragraph followed by a nested sublist, demonstrating how Markdown parsers interpret such structures. ```markdown I need to buy - new shoes - a coat - a plane ticket ``` -------------------------------- ### Nested Code Fence Example Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Demonstrates how a nested code fence is handled. The inner fence does not need to match the outer fence's delimiters. ```markdown ```````````````````````````````` example ``` aaa ``` .

aaa

```````````````````````````````` ``` -------------------------------- ### Emphasis Parsing Rules Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Examples illustrating complex parsing scenarios involving mixed delimiters and inline elements. ```markdown *foo _bar* baz_ .

foo _bar baz_

``` ```markdown *foo __bar *baz bim__ bam* .

foo bar *baz bim bam

``` ```markdown **foo **bar baz** .

**foo bar baz

``` ```markdown *foo *bar baz* .

*foo bar baz

``` ```markdown *[bar*](/url) .

*bar*

``` ```markdown _foo [bar_](/url) .

_foo bar_

``` ```markdown *

``` ```markdown ** .

``` ```markdown __ .

``` ```markdown *a `*`* .

a *

``` ```markdown _a `_`_ .

a _

``` ```markdown **a .

**a http://foo.bar/?q=**

``` ```markdown __a .

__ahttp://foo.bar/?q=__

``` -------------------------------- ### HTML Block Starting with Closing Tag Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Demonstrates that an HTML block can begin with a closing tag. ```markdown

*foo* .

*foo* ``` -------------------------------- ### Invalid Link Reference Definitions Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Examples of syntax that fails to create a valid link reference definition. ```markdown [foo]: /url 'title with blank line' [foo] .

[foo]: /url 'title

with blank line'

[foo]

``` ```markdown [foo]: [foo] .

[foo]:

[foo]

``` ```markdown [foo]: (baz) [foo] .

[foo]: (baz)

[foo]

``` ```markdown [foo]: /url "title" ok .

[foo]: /url "title" ok

``` ```markdown [foo]: /url "title" ok .

"title" ok

``` ```markdown [foo]: /url "title" [foo] .

[foo]: /url "title"

[foo]

``` ```markdown ``` [foo]: /url ``` [foo] .

[foo]: /url

[foo]

``` -------------------------------- ### Plain text content parsing Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Examples of how special characters, non-ASCII characters, and multiple spaces are handled as plain text. ```markdown hello $.;'there .

hello $.;'there

``` ```markdown Foo χρῆν .

Foo χρῆν

``` ```markdown Multiple spaces .

Multiple spaces

``` -------------------------------- ### HTML Block with Custom Tag Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Illustrates an HTML block starting with a custom tag name, which can be anything. ```html *bar* . ``` ```html *bar* ``` -------------------------------- ### Markdown List Items with Blank Lines Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Demonstrates how list items starting with a blank line are rendered, including nested code blocks. ```markdown - foo - ``` bar ``` - baz ``` ```html

foo
```
bar
```
```
baz
```

``` -------------------------------- ### Markdown Lazy Continuation Lines Example Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Shows how lazy continuation lines in a list item are handled, preserving nested structures. ```markdown 1. A paragraph with two lines. indented code > A block quote. ``` ```html

A paragraph with two lines.
```
indented code
```
A block quote.

``` -------------------------------- ### HTML Block with Closing Tag Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Demonstrates an HTML block starting with a closing tag. ```html *bar* . ``` ```html *bar* ``` -------------------------------- ### Indented Code Fence Example Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Shows that an indented code fence is not recognized as a closing fence. ```markdown ```````````````````````````````` example ``` aaa ``` .

aaa
    ```

```````````````````````````````` ``` -------------------------------- ### Partial HTML Tag Example Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Illustrates how cmark-gfm handles HTML blocks with partially formed tags. ```html

foo

bar

``` -------------------------------- ### HTML Block with Non-Block-Level Tag Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Shows how to start an HTML block with a non-block-level tag, requiring the tag to be complete and on its own line. ```html *bar* . ``` ```html *bar* ``` -------------------------------- ### Build and Test Commands Source: https://github.com/github/cmark-gfm/blob/master/test/CMakeLists.txt Command-line instructions for building and running tests with verbose output. ```bash cmake --build build --target "test" -- ARGS='-V' ``` -------------------------------- ### Non-Autolink Examples Source: https://github.com/github/cmark-gfm/blob/master/test/extensions.txt Illustrates text patterns that should not be interpreted as autolinks, such as email-like strings with leading/trailing dots or spaces, and specific character combinations. ```markdown These should not link: * @a.b.c@. x * n@. b ``` ```html

@a.b.c@. x
n@. b

``` -------------------------------- ### Invalid Negative Ordered List Start Number Source: https://github.com/github/cmark-gfm/blob/master/test/spec.txt Negative numbers are not valid start numbers for ordered lists. This example shows an invalid negative start number. ```markdown -1. not ok . ``` ```html

-1. not ok

``` -------------------------------- ### Configure Parser and Rendering Options Source: https://context7.com/github/cmark-gfm/llms.txt Shows how to use option flags to control smart punctuation, security settings, source position inclusion, and line break handling. ```c #include #include #include "cmark-gfm.h" int main() { const char *markdown = "\"Hello\" -- Pro-tip: Use --- for em-dashes.\n\n" "\n\n" "[evil](javascript:alert('xss'))\n"; // CMARK_OPT_SMART: Convert straight quotes to curly, --- to em dashes char *smart = cmark_markdown_to_html(markdown, strlen(markdown), CMARK_OPT_SMART); printf("=== Smart Punctuation ===\n%s\n", smart); // Converts "Hello" to curly quotes, -- to en-dash, --- to em-dash free(smart); // CMARK_OPT_UNSAFE: Allow raw HTML and dangerous links (default is safe) char *unsafe = cmark_markdown_to_html(markdown, strlen(markdown), CMARK_OPT_UNSAFE); printf("=== Unsafe Mode ===\n%s\n", unsafe); // Includes raw