Trait Visit

Source

pub trait Visit {
Show 66 methods    // Provided methods
    fn visit<N: Node>(&mut self, i: &N)
       where Self: Sized { ... }
    fn visit_assignment(&mut self, i: &Assignment) { ... }
    fn visit_assignments(&mut self, i: &Assignments) { ... }
    fn visit_association(&mut self, i: &Association) { ... }
    fn visit_cte(&mut self, i: &Cte) { ... }
    fn visit_expr(&mut self, i: &Expr) { ... }
    fn visit_expr_and(&mut self, i: &ExprAnd) { ... }
    fn visit_expr_any(&mut self, i: &ExprAny) { ... }
    fn visit_expr_arg(&mut self, i: &ExprArg) { ... }
    fn visit_expr_binary_op(&mut self, i: &ExprBinaryOp) { ... }
    fn visit_expr_cast(&mut self, i: &ExprCast) { ... }
    fn visit_expr_column(&mut self, i: &ExprColumn) { ... }
    fn visit_expr_default(&mut self) { ... }
    fn visit_expr_error(&mut self, i: &ExprError) { ... }
    fn visit_expr_exists(&mut self, i: &ExprExists) { ... }
    fn visit_expr_func(&mut self, i: &ExprFunc) { ... }
    fn visit_expr_func_count(&mut self, i: &FuncCount) { ... }
    fn visit_expr_func_last_insert_id(&mut self, i: &FuncLastInsertId) { ... }
    fn visit_expr_in_list(&mut self, i: &ExprInList) { ... }
    fn visit_expr_in_subquery(&mut self, i: &ExprInSubquery) { ... }
    fn visit_expr_is_null(&mut self, i: &ExprIsNull) { ... }
    fn visit_expr_is_variant(&mut self, i: &ExprIsVariant) { ... }
    fn visit_expr_let(&mut self, i: &ExprLet) { ... }
    fn visit_expr_map(&mut self, i: &ExprMap) { ... }
    fn visit_expr_match(&mut self, i: &ExprMatch) { ... }
    fn visit_expr_not(&mut self, i: &ExprNot) { ... }
    fn visit_expr_or(&mut self, i: &ExprOr) { ... }
    fn visit_expr_list(&mut self, i: &ExprList) { ... }
    fn visit_expr_record(&mut self, i: &ExprRecord) { ... }
    fn visit_expr_reference(&mut self, i: &ExprReference) { ... }
    fn visit_expr_set(&mut self, i: &ExprSet) { ... }
    fn visit_expr_set_op(&mut self, i: &ExprSetOp) { ... }
    fn visit_expr_stmt(&mut self, i: &ExprStmt) { ... }
    fn visit_filter(&mut self, i: &Filter) { ... }
    fn visit_condition(&mut self, i: &Condition) { ... }
    fn visit_expr_project(&mut self, i: &ExprProject) { ... }
    fn visit_insert_target(&mut self, i: &InsertTarget) { ... }
    fn visit_join(&mut self, i: &Join) { ... }
    fn visit_limit(&mut self, i: &Limit) { ... }
    fn visit_limit_cursor(&mut self, i: &LimitCursor) { ... }
    fn visit_limit_offset(&mut self, i: &LimitOffset) { ... }
    fn visit_order_by(&mut self, i: &OrderBy) { ... }
    fn visit_order_by_expr(&mut self, i: &OrderByExpr) { ... }
    fn visit_path(&mut self, i: &Path) { ... }
    fn visit_projection(&mut self, i: &Projection) { ... }
    fn visit_returning(&mut self, i: &Returning) { ... }
    fn visit_source(&mut self, i: &Source) { ... }
    fn visit_source_model(&mut self, i: &SourceModel) { ... }
    fn visit_source_table(&mut self, i: &SourceTable) { ... }
    fn visit_source_table_id(&mut self, i: &SourceTableId) { ... }
    fn visit_stmt(&mut self, i: &Statement) { ... }
    fn visit_stmt_delete(&mut self, i: &Delete) { ... }
    fn visit_stmt_insert(&mut self, i: &Insert) { ... }
    fn visit_stmt_query(&mut self, i: &Query) { ... }
    fn visit_stmt_select(&mut self, i: &Select) { ... }
    fn visit_stmt_update(&mut self, i: &Update) { ... }
    fn visit_table_derived(&mut self, i: &TableDerived) { ... }
    fn visit_table_ref(&mut self, i: &TableRef) { ... }
    fn visit_table_factor(&mut self, i: &TableFactor) { ... }
    fn visit_table_with_joins(&mut self, i: &TableWithJoins) { ... }
    fn visit_type(&mut self, i: &Type) { ... }
    fn visit_update_target(&mut self, i: &UpdateTarget) { ... }
    fn visit_value(&mut self, i: &Value) { ... }
    fn visit_value_record(&mut self, i: &ValueRecord) { ... }
    fn visit_values(&mut self, i: &Values) { ... }
    fn visit_with(&mut self, i: &With) { ... }
}

Expand description

Immutable visitor trait for the statement AST.

Implement this trait to walk the AST without modifying it. Each visit_* method has a default implementation that recurses into child nodes via the corresponding free function (e.g., visit_expr). Override specific methods to inspect nodes of interest.

The companion for_each_expr helper visits every expression node in post-order.

§Examples

use toasty_core::stmt::{visit, Expr, Value, Node};

let expr = Expr::from(Value::from(42_i64));
let mut count = 0;
visit::for_each_expr(&expr, |_| count += 1);
assert_eq!(count, 1);