Step 4: Implement the Parser

Create manifest parser in parser.rs with position tracking:

#![allow(unused)]
fn main() {
//! {Manifest} parser with position tracking.

use crate::error::Result;
use crate::types::{Ecosystem}Dependency;
use std::any::Any;
use url::Url;
use deps_core::lsp_helpers::LineOffsetTable;

/// Parse result containing dependencies and metadata.
#[derive(Debug)]
pub struct {Ecosystem}ParseResult {
    pub dependencies: Vec<{Ecosystem}Dependency>,
    pub uri: Url,
}

impl deps_core::ParseResult for {Ecosystem}ParseResult {
    fn dependencies(&self) -> Vec<&dyn deps_core::Dependency> {
        self.dependencies
            .iter()
            .map(|d| d as &dyn deps_core::Dependency)
            .collect()
    }

    fn workspace_root(&self) -> Option<&std::path::Path> {
        None // Override if ecosystem supports workspaces
    }

    fn uri(&self) -> &Url {
        &self.uri
    }

    fn as_any(&self) -> &dyn Any {
        self
    }
}

/// Parse manifest file and extract dependencies with positions.
pub fn parse_{manifest}(content: &str, uri: &Url) -> Result<{Ecosystem}ParseResult> {
    let line_table = LineOffsetTable::new(content);

    // TODO: Implement actual parsing logic
    // Key requirements:
    // 1. Track byte offsets for every dependency name and version
    // 2. Convert offsets to LSP Position using line_table.byte_offset_to_position(content, offset)
    // 3. Handle all dependency sections

    Ok({Ecosystem}ParseResult {
        dependencies: vec![],
        uri: uri.clone(),
    })
}
}