### Custom Markdown Mapper with Fancy Symbols

Source: https://docs.rs/mdfrier

Implement the Mapper trait to customize markdown delimiter symbols. This example replaces standard delimiters with custom characters.

```rust
use mdfrier::{MdFrier, Mapper};

struct FancyMapper;
impl Mapper for FancyMapper {
    fn emphasis_open(&self) -> &str { "♥" }
    fn emphasis_close(&self) -> &str { "♥" }
    fn strong_open(&self) -> &str { "✦" }
    fn strong_close(&self) -> &str { "✦" }
    fn blockquote_bar(&self) -> &str { "➤ " }
}

let mut frier = MdFrier::new().unwrap();

let lines = frier.parse(80, "Hello *world*!\n\n> Quote\n\n**Bold**".to_owned(), &FancyMapper);
let mut output = String::new();
for line in lines {
    for span in line.spans {
        output.push_str(&span.content);
    }
    output.push('\n');
}
assert_eq!(output, "Hello ♥world♥!\n\n➤ Quote\n\n✦Bold✦\n");

```

--------------------------------

### Parse Markdown with DefaultMapper

Source: https://docs.rs/mdfrier

Use DefaultMapper to preserve markdown content without removing decorators. For editor syntax highlighting, using tree-sitter-md directly is more efficient.

```rust
use mdfrier::{MdFrier, DefaultMapper};

let mut frier = MdFrier::new().unwrap();

let lines = frier.parse(80, "*emphasis* and **strong**".to_owned(), &DefaultMapper);
let text: String = lines.iter()
    .flat_map(|l| l.spans.iter().map(|s| s.content.as_str()))
    .collect();
assert_eq!(text, "*emphasis* and **strong**");



```

--------------------------------

### Parse Markdown with StyledMapper

Source: https://docs.rs/mdfrier

Use StyledMapper to remove markdown decorators for later styling with colors and bold/italics. The styles should be applied when iterating over the Line's Spans.

```rust
use mdfrier::{MdFrier, Line, Span, Mapper, DefaultMapper, StyledMapper};

let mut frier = MdFrier::new().unwrap();

// StyledMapper removes decorators (for use with colors/bold/italic styling)
let lines = frier.parse(80, "*emphasis* and **strong**".to_owned(), &StyledMapper);
let text: String = lines.iter()
    .flat_map(|l: &Line| l.spans.iter().map(|s: &Span| 
        // We should really add colors from `s.modifiers` here!
        s.content.as_str()
    ))
    .collect();
assert_eq!(text, "emphasis and strong");

```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.