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use std::str::FromStr;
use yaml_edit::*;
fn main() -> Result<(), Box<dyn std::error::Error>> {
println!("=== YAML Directive Support Example ===\n");
// Example 1: Parse YAML with directives
println!("1. Parsing YAML with directives:");
let yaml_content = r#"%YAML 1.2
%TAG ! tag:example.com,2000:app/
---
name: my-application
version: 1.0.0
"#;
let parsed = YamlFile::from_str(yaml_content)?;
println!("Input:\n{}", yaml_content);
// Access directives
let directives: Vec<_> = parsed.directives().collect();
println!("Found {} directives:", directives.len());
for directive in &directives {
println!(" - {}", directive.text());
if let Some(name) = directive.name() {
println!(" Name: {}", name);
if let Some(value) = directive.value() {
println!(" Value: {}", value);
}
}
}
// Example 2: Create YAML with directives programmatically
println!("\n2. Creating YAML with directives programmatically:");
let yaml = YamlFile::new();
// Add YAML version directive
yaml.add_directive("%YAML 1.2");
// Add TAG directive
yaml.add_directive("%TAG ! tag:example.com,2000:app/");
// Create a document
let doc = Document::new_mapping();
doc.set("application", "yaml-edit");
doc.set("version", "0.1.0");
doc.set("author", "Jelmer Vernooij");
yaml.push_document(doc);
println!("Generated YAML:\n{}", yaml);
// Example 3: Working with different directive types
println!("\n3. Creating specific directive types:");
let yaml_dir = Directive::new_yaml_version("1.2");
println!("YAML version directive: {}", yaml_dir.text());
println!("Is YAML version: {}", yaml_dir.is_yaml_version());
let tag_dir = Directive::new_tag("!local!", "tag:local.example.com,2000:");
println!("TAG directive: {}", tag_dir.text());
println!("Is TAG directive: {}", tag_dir.is_tag());
// Example 4: Document preservation
println!("\n4. Document preservation test:");
let complex_yaml = r#"%YAML 1.2
%TAG !local! tag:local.example.com,2000:
%TAG !example! tag:example.com,2000:
---
name: !local!string "my-app"
version: "1.0"
dependencies: !example!list
- yaml-edit
- serde
---
second_doc: value
"#;
let parsed_complex = YamlFile::from_str(complex_yaml)?;
println!("Original:\n{}", complex_yaml);
println!("Parsed and serialized:\n{}", parsed_complex);
let dirs: Vec<_> = parsed_complex.directives().collect();
println!("Preserved {} directives", dirs.len());
let docs: Vec<_> = parsed_complex.documents().collect();
println!("Preserved {} documents", docs.len());
Ok(())
}
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