Trait Visitor

Source

pub trait Visitor: Sized {
    // Provided methods
    fn visit_source_file(&mut self, source_file: &SourceFile) { ... }
    fn visit_decl(&mut self, decl: &AstDecl) { ... }
    fn visit_package_spec(&mut self, _name: &str, _span: &Span) { ... }
    fn visit_package_body(&mut self, _name: &str, _span: &Span) { ... }
    fn visit_procedure(&mut self, _name: &str, _span: &Span) { ... }
    fn visit_function(&mut self, _name: &str, _span: &Span) { ... }
    fn visit_trigger(&mut self, _name: &str, _span: &Span) { ... }
    fn visit_view(&mut self, _name: &str, _span: &Span) { ... }
    fn visit_type_spec(&mut self, _name: &str, _span: &Span) { ... }
    fn visit_type_body(&mut self, _name: &str, _span: &Span) { ... }
    fn visit_ddl(&mut self, _kind: &str, _span: &Span) { ... }
    fn visit_unknown(&mut self, _span: &Span) { ... }
}

Expand description

Trait for visiting AST nodes.

Every method has a default implementation that recurses into children via the corresponding walk_* function. Override only the methods you care about.

§Example

use plsql_parser::visit::{Visitor, walk};
use plsql_parser::ast::{SourceFile, AstDecl};

struct DeclCounter {
    count: usize,
}

impl Visitor for DeclCounter {
    fn visit_decl(&mut self, decl: &AstDecl) {
        self.count += 1;
        walk::walk_decl(self, decl);
    }
}