use abi::Abi;
use ast::*;
use ast;
use codemap::Span;
use ptr::P;
use owned_slice::OwnedSlice;
#[derive(Copy, Clone, PartialEq, Eq)]
pub enum FnKind<'a> {
ItemFn(Ident, &'a Generics, Unsafety, Constness, Abi, Visibility),
Method(Ident, &'a MethodSig, Option<Visibility>),
Closure,
}
pub trait Visitor<'v> : Sized {
fn visit_name(&mut self, _span: Span, _name: Name) {
}
fn visit_ident(&mut self, span: Span, ident: Ident) {
self.visit_name(span, ident.name);
}
fn visit_mod(&mut self, m: &'v Mod, _s: Span, _n: NodeId) { walk_mod(self, m) }
fn visit_foreign_item(&mut self, i: &'v ForeignItem) { walk_foreign_item(self, i) }
fn visit_item(&mut self, i: &'v Item) { walk_item(self, i) }
fn visit_local(&mut self, l: &'v Local) { walk_local(self, l) }
fn visit_block(&mut self, b: &'v Block) { walk_block(self, b) }
fn visit_stmt(&mut self, s: &'v Stmt) { walk_stmt(self, s) }
fn visit_arm(&mut self, a: &'v Arm) { walk_arm(self, a) }
fn visit_pat(&mut self, p: &'v Pat) { walk_pat(self, p) }
fn visit_decl(&mut self, d: &'v Decl) { walk_decl(self, d) }
fn visit_expr(&mut self, ex: &'v Expr) { walk_expr(self, ex) }
fn visit_expr_post(&mut self, _ex: &'v Expr) { }
fn visit_ty(&mut self, t: &'v Ty) { walk_ty(self, t) }
fn visit_generics(&mut self, g: &'v Generics) { walk_generics(self, g) }
fn visit_fn(&mut self, fk: FnKind<'v>, fd: &'v FnDecl, b: &'v Block, s: Span, _: NodeId) {
walk_fn(self, fk, fd, b, s)
}
fn visit_trait_item(&mut self, ti: &'v TraitItem) { walk_trait_item(self, ti) }
fn visit_impl_item(&mut self, ii: &'v ImplItem) { walk_impl_item(self, ii) }
fn visit_trait_ref(&mut self, t: &'v TraitRef) { walk_trait_ref(self, t) }
fn visit_ty_param_bound(&mut self, bounds: &'v TyParamBound) {
walk_ty_param_bound(self, bounds)
}
fn visit_poly_trait_ref(&mut self, t: &'v PolyTraitRef, m: &'v TraitBoundModifier) {
walk_poly_trait_ref(self, t, m)
}
fn visit_struct_def(&mut self, s: &'v StructDef, _: Ident, _: &'v Generics, _: NodeId) {
walk_struct_def(self, s)
}
fn visit_struct_field(&mut self, s: &'v StructField) { walk_struct_field(self, s) }
fn visit_enum_def(&mut self, enum_definition: &'v EnumDef,
generics: &'v Generics) {
walk_enum_def(self, enum_definition, generics)
}
fn visit_variant(&mut self, v: &'v Variant, g: &'v Generics) { walk_variant(self, v, g) }
fn visit_opt_lifetime_ref(&mut self,
_span: Span,
opt_lifetime: &'v Option<Lifetime>) {
match *opt_lifetime {
Some(ref l) => self.visit_lifetime_ref(l),
None => ()
}
}
fn visit_lifetime_bound(&mut self, lifetime: &'v Lifetime) {
walk_lifetime_bound(self, lifetime)
}
fn visit_lifetime_ref(&mut self, lifetime: &'v Lifetime) {
walk_lifetime_ref(self, lifetime)
}
fn visit_lifetime_def(&mut self, lifetime: &'v LifetimeDef) {
walk_lifetime_def(self, lifetime)
}
fn visit_explicit_self(&mut self, es: &'v ExplicitSelf) {
walk_explicit_self(self, es)
}
fn visit_mac(&mut self, _mac: &'v Mac) {
panic!("visit_mac disabled by default");
}
fn visit_path(&mut self, path: &'v Path, _id: ast::NodeId) {
walk_path(self, path)
}
fn visit_path_segment(&mut self, path_span: Span, path_segment: &'v PathSegment) {
walk_path_segment(self, path_span, path_segment)
}
fn visit_path_parameters(&mut self, path_span: Span, path_parameters: &'v PathParameters) {
walk_path_parameters(self, path_span, path_parameters)
}
fn visit_assoc_type_binding(&mut self, type_binding: &'v TypeBinding) {
walk_assoc_type_binding(self, type_binding)
}
fn visit_attribute(&mut self, _attr: &'v Attribute) {}
}
pub fn walk_crate<'v, V: Visitor<'v>>(visitor: &mut V, krate: &'v Crate) {
visitor.visit_mod(&krate.module, krate.span, CRATE_NODE_ID);
for attr in &krate.attrs {
visitor.visit_attribute(attr);
}
}
pub fn walk_mod<'v, V: Visitor<'v>>(visitor: &mut V, module: &'v Mod) {
for item in &module.items {
visitor.visit_item(&**item)
}
}
pub fn walk_local<'v, V: Visitor<'v>>(visitor: &mut V, local: &'v Local) {
visitor.visit_pat(&*local.pat);
walk_ty_opt(visitor, &local.ty);
walk_expr_opt(visitor, &local.init);
}
pub fn walk_lifetime_def<'v, V: Visitor<'v>>(visitor: &mut V,
lifetime_def: &'v LifetimeDef) {
visitor.visit_name(lifetime_def.lifetime.span, lifetime_def.lifetime.name);
for bound in &lifetime_def.bounds {
visitor.visit_lifetime_bound(bound);
}
}
pub fn walk_lifetime_bound<'v, V: Visitor<'v>>(visitor: &mut V,
lifetime_ref: &'v Lifetime) {
visitor.visit_lifetime_ref(lifetime_ref)
}
pub fn walk_lifetime_ref<'v, V: Visitor<'v>>(visitor: &mut V,
lifetime_ref: &'v Lifetime) {
visitor.visit_name(lifetime_ref.span, lifetime_ref.name)
}
pub fn walk_explicit_self<'v, V: Visitor<'v>>(visitor: &mut V,
explicit_self: &'v ExplicitSelf) {
match explicit_self.node {
SelfStatic | SelfValue(_) => {},
SelfRegion(ref lifetime, _, _) => {
visitor.visit_opt_lifetime_ref(explicit_self.span, lifetime)
}
SelfExplicit(ref typ, _) => visitor.visit_ty(&**typ),
}
}
pub fn walk_poly_trait_ref<'v, V>(visitor: &mut V,
trait_ref: &'v PolyTraitRef,
_modifier: &'v TraitBoundModifier)
where V: Visitor<'v>
{
walk_lifetime_decls_helper(visitor, &trait_ref.bound_lifetimes);
visitor.visit_trait_ref(&trait_ref.trait_ref);
}
pub fn walk_trait_ref<'v,V>(visitor: &mut V,
trait_ref: &'v TraitRef)
where V: Visitor<'v>
{
visitor.visit_path(&trait_ref.path, trait_ref.ref_id)
}
pub fn walk_item<'v, V: Visitor<'v>>(visitor: &mut V, item: &'v Item) {
visitor.visit_ident(item.span, item.ident);
match item.node {
ItemExternCrate(..) => {}
ItemUse(ref vp) => {
match vp.node {
ViewPathSimple(ident, ref path) => {
visitor.visit_ident(vp.span, ident);
visitor.visit_path(path, item.id);
}
ViewPathGlob(ref path) => {
visitor.visit_path(path, item.id);
}
ViewPathList(ref prefix, ref list) => {
for id in list {
match id.node {
PathListIdent { name, rename, .. } => {
visitor.visit_ident(id.span, name);
if let Some(ident) = rename {
visitor.visit_ident(id.span, ident);
}
}
PathListMod { rename, .. } => {
if let Some(ident) = rename {
visitor.visit_ident(id.span, ident);
}
}
}
}
walk_path(visitor, prefix);
}
}
}
ItemStatic(ref typ, _, ref expr) |
ItemConst(ref typ, ref expr) => {
visitor.visit_ty(&**typ);
visitor.visit_expr(&**expr);
}
ItemFn(ref declaration, unsafety, constness, abi, ref generics, ref body) => {
visitor.visit_fn(FnKind::ItemFn(item.ident, generics, unsafety,
constness, abi, item.vis),
&**declaration,
&**body,
item.span,
item.id)
}
ItemMod(ref module) => {
visitor.visit_mod(module, item.span, item.id)
}
ItemForeignMod(ref foreign_module) => {
for foreign_item in &foreign_module.items {
visitor.visit_foreign_item(&**foreign_item)
}
}
ItemTy(ref typ, ref type_parameters) => {
visitor.visit_ty(&**typ);
visitor.visit_generics(type_parameters)
}
ItemEnum(ref enum_definition, ref type_parameters) => {
visitor.visit_generics(type_parameters);
visitor.visit_enum_def(enum_definition, type_parameters)
}
ItemDefaultImpl(_, ref trait_ref) => {
visitor.visit_trait_ref(trait_ref)
}
ItemImpl(_, _,
ref type_parameters,
ref trait_reference,
ref typ,
ref impl_items) => {
visitor.visit_generics(type_parameters);
match *trait_reference {
Some(ref trait_reference) => visitor.visit_trait_ref(trait_reference),
None => ()
}
visitor.visit_ty(&**typ);
for impl_item in impl_items {
visitor.visit_impl_item(impl_item);
}
}
ItemStruct(ref struct_definition, ref generics) => {
visitor.visit_generics(generics);
visitor.visit_struct_def(&**struct_definition,
item.ident,
generics,
item.id)
}
ItemTrait(_, ref generics, ref bounds, ref methods) => {
visitor.visit_generics(generics);
walk_ty_param_bounds_helper(visitor, bounds);
for method in methods {
visitor.visit_trait_item(method)
}
}
ItemMac(ref mac) => visitor.visit_mac(mac),
}
for attr in &item.attrs {
visitor.visit_attribute(attr);
}
}
pub fn walk_enum_def<'v, V: Visitor<'v>>(visitor: &mut V,
enum_definition: &'v EnumDef,
generics: &'v Generics) {
for variant in &enum_definition.variants {
visitor.visit_variant(&**variant, generics);
}
}
pub fn walk_variant<'v, V: Visitor<'v>>(visitor: &mut V,
variant: &'v Variant,
generics: &'v Generics) {
visitor.visit_ident(variant.span, variant.node.name);
match variant.node.kind {
TupleVariantKind(ref variant_arguments) => {
for variant_argument in variant_arguments {
visitor.visit_ty(&*variant_argument.ty)
}
}
StructVariantKind(ref struct_definition) => {
visitor.visit_struct_def(&**struct_definition,
variant.node.name,
generics,
variant.node.id)
}
}
match variant.node.disr_expr {
Some(ref expr) => visitor.visit_expr(&**expr),
None => ()
}
for attr in &variant.node.attrs {
visitor.visit_attribute(attr);
}
}
pub fn skip_ty<'v, V: Visitor<'v>>(_: &mut V, _: &'v Ty) {
}
pub fn walk_ty_opt<'v, V: Visitor<'v>>(visitor: &mut V, optional_type: &'v Option<P<Ty>>) {
match *optional_type {
Some(ref ty) => visitor.visit_ty(&**ty),
None => ()
}
}
pub fn walk_ty<'v, V: Visitor<'v>>(visitor: &mut V, typ: &'v Ty) {
match typ.node {
TyVec(ref ty) | TyParen(ref ty) => {
visitor.visit_ty(&**ty)
}
TyPtr(ref mutable_type) => {
visitor.visit_ty(&*mutable_type.ty)
}
TyRptr(ref lifetime, ref mutable_type) => {
visitor.visit_opt_lifetime_ref(typ.span, lifetime);
visitor.visit_ty(&*mutable_type.ty)
}
TyTup(ref tuple_element_types) => {
for tuple_element_type in tuple_element_types {
visitor.visit_ty(&**tuple_element_type)
}
}
TyBareFn(ref function_declaration) => {
for argument in &function_declaration.decl.inputs {
visitor.visit_ty(&*argument.ty)
}
walk_fn_ret_ty(visitor, &function_declaration.decl.output);
walk_lifetime_decls_helper(visitor, &function_declaration.lifetimes);
}
TyPath(ref maybe_qself, ref path) => {
if let Some(ref qself) = *maybe_qself {
visitor.visit_ty(&qself.ty);
}
visitor.visit_path(path, typ.id);
}
TyObjectSum(ref ty, ref bounds) => {
visitor.visit_ty(&**ty);
walk_ty_param_bounds_helper(visitor, bounds);
}
TyFixedLengthVec(ref ty, ref expression) => {
visitor.visit_ty(&**ty);
visitor.visit_expr(&**expression)
}
TyPolyTraitRef(ref bounds) => {
walk_ty_param_bounds_helper(visitor, bounds)
}
TyTypeof(ref expression) => {
visitor.visit_expr(&**expression)
}
TyInfer => {}
TyMac(ref mac) => {
visitor.visit_mac(mac)
}
}
}
pub fn walk_lifetime_decls_helper<'v, V: Visitor<'v>>(visitor: &mut V,
lifetimes: &'v Vec<LifetimeDef>) {
for l in lifetimes {
visitor.visit_lifetime_def(l);
}
}
pub fn walk_path<'v, V: Visitor<'v>>(visitor: &mut V, path: &'v Path) {
for segment in &path.segments {
visitor.visit_path_segment(path.span, segment);
}
}
pub fn walk_path_segment<'v, V: Visitor<'v>>(visitor: &mut V,
path_span: Span,
segment: &'v PathSegment) {
visitor.visit_ident(path_span, segment.identifier);
visitor.visit_path_parameters(path_span, &segment.parameters);
}
pub fn walk_path_parameters<'v, V: Visitor<'v>>(visitor: &mut V,
_path_span: Span,
path_parameters: &'v PathParameters) {
match *path_parameters {
ast::AngleBracketedParameters(ref data) => {
for typ in data.types.iter() {
visitor.visit_ty(&**typ);
}
for lifetime in &data.lifetimes {
visitor.visit_lifetime_ref(lifetime);
}
for binding in data.bindings.iter() {
visitor.visit_assoc_type_binding(&**binding);
}
}
ast::ParenthesizedParameters(ref data) => {
for typ in &data.inputs {
visitor.visit_ty(&**typ);
}
if let Some(ref typ) = data.output {
visitor.visit_ty(&**typ);
}
}
}
}
pub fn walk_assoc_type_binding<'v, V: Visitor<'v>>(visitor: &mut V,
type_binding: &'v TypeBinding) {
visitor.visit_ident(type_binding.span, type_binding.ident);
visitor.visit_ty(&*type_binding.ty);
}
pub fn walk_pat<'v, V: Visitor<'v>>(visitor: &mut V, pattern: &'v Pat) {
match pattern.node {
PatEnum(ref path, ref children) => {
visitor.visit_path(path, pattern.id);
if let Some(ref children) = *children {
for child in children {
visitor.visit_pat(&*child)
}
}
}
PatQPath(ref qself, ref path) => {
visitor.visit_ty(&qself.ty);
visitor.visit_path(path, pattern.id)
}
PatStruct(ref path, ref fields, _) => {
visitor.visit_path(path, pattern.id);
for field in fields {
visitor.visit_pat(&*field.node.pat)
}
}
PatTup(ref tuple_elements) => {
for tuple_element in tuple_elements {
visitor.visit_pat(&**tuple_element)
}
}
PatBox(ref subpattern) |
PatRegion(ref subpattern, _) => {
visitor.visit_pat(&**subpattern)
}
PatIdent(_, ref pth1, ref optional_subpattern) => {
visitor.visit_ident(pth1.span, pth1.node);
match *optional_subpattern {
None => {}
Some(ref subpattern) => visitor.visit_pat(&**subpattern),
}
}
PatLit(ref expression) => visitor.visit_expr(&**expression),
PatRange(ref lower_bound, ref upper_bound) => {
visitor.visit_expr(&**lower_bound);
visitor.visit_expr(&**upper_bound)
}
PatWild(_) => (),
PatVec(ref prepattern, ref slice_pattern, ref postpatterns) => {
for prepattern in prepattern {
visitor.visit_pat(&**prepattern)
}
if let Some(ref slice_pattern) = *slice_pattern {
visitor.visit_pat(&**slice_pattern)
}
for postpattern in postpatterns {
visitor.visit_pat(&**postpattern)
}
}
PatMac(ref mac) => visitor.visit_mac(mac),
}
}
pub fn walk_foreign_item<'v, V: Visitor<'v>>(visitor: &mut V,
foreign_item: &'v ForeignItem) {
visitor.visit_ident(foreign_item.span, foreign_item.ident);
match foreign_item.node {
ForeignItemFn(ref function_declaration, ref generics) => {
walk_fn_decl(visitor, &**function_declaration);
visitor.visit_generics(generics)
}
ForeignItemStatic(ref typ, _) => visitor.visit_ty(&**typ),
}
for attr in &foreign_item.attrs {
visitor.visit_attribute(attr);
}
}
pub fn walk_ty_param_bounds_helper<'v, V: Visitor<'v>>(visitor: &mut V,
bounds: &'v OwnedSlice<TyParamBound>) {
for bound in bounds.iter() {
visitor.visit_ty_param_bound(bound)
}
}
pub fn walk_ty_param_bound<'v, V: Visitor<'v>>(visitor: &mut V,
bound: &'v TyParamBound) {
match *bound {
TraitTyParamBound(ref typ, ref modifier) => {
visitor.visit_poly_trait_ref(typ, modifier);
}
RegionTyParamBound(ref lifetime) => {
visitor.visit_lifetime_bound(lifetime);
}
}
}
pub fn walk_generics<'v, V: Visitor<'v>>(visitor: &mut V, generics: &'v Generics) {
for param in generics.ty_params.iter() {
visitor.visit_ident(param.span, param.ident);
walk_ty_param_bounds_helper(visitor, ¶m.bounds);
walk_ty_opt(visitor, ¶m.default);
}
walk_lifetime_decls_helper(visitor, &generics.lifetimes);
for predicate in &generics.where_clause.predicates {
match predicate {
&ast::WherePredicate::BoundPredicate(ast::WhereBoundPredicate{ref bounded_ty,
ref bounds,
..}) => {
visitor.visit_ty(&**bounded_ty);
walk_ty_param_bounds_helper(visitor, bounds);
}
&ast::WherePredicate::RegionPredicate(ast::WhereRegionPredicate{ref lifetime,
ref bounds,
..}) => {
visitor.visit_lifetime_ref(lifetime);
for bound in bounds {
visitor.visit_lifetime_ref(bound);
}
}
&ast::WherePredicate::EqPredicate(ast::WhereEqPredicate{id,
ref path,
ref ty,
..}) => {
visitor.visit_path(path, id);
visitor.visit_ty(&**ty);
}
}
}
}
pub fn walk_fn_ret_ty<'v, V: Visitor<'v>>(visitor: &mut V, ret_ty: &'v FunctionRetTy) {
if let Return(ref output_ty) = *ret_ty {
visitor.visit_ty(&**output_ty)
}
}
pub fn walk_fn_decl<'v, V: Visitor<'v>>(visitor: &mut V, function_declaration: &'v FnDecl) {
for argument in &function_declaration.inputs {
visitor.visit_pat(&*argument.pat);
visitor.visit_ty(&*argument.ty)
}
walk_fn_ret_ty(visitor, &function_declaration.output)
}
pub fn walk_fn<'v, V: Visitor<'v>>(visitor: &mut V,
function_kind: FnKind<'v>,
function_declaration: &'v FnDecl,
function_body: &'v Block,
_span: Span) {
walk_fn_decl(visitor, function_declaration);
match function_kind {
FnKind::ItemFn(_, generics, _, _, _, _) => {
visitor.visit_generics(generics);
}
FnKind::Method(_, sig, _) => {
visitor.visit_generics(&sig.generics);
visitor.visit_explicit_self(&sig.explicit_self);
}
FnKind::Closure(..) => {}
}
visitor.visit_block(function_body)
}
pub fn walk_trait_item<'v, V: Visitor<'v>>(visitor: &mut V, trait_item: &'v TraitItem) {
visitor.visit_ident(trait_item.span, trait_item.ident);
for attr in &trait_item.attrs {
visitor.visit_attribute(attr);
}
match trait_item.node {
ConstTraitItem(ref ty, ref default) => {
visitor.visit_ty(ty);
if let Some(ref expr) = *default {
visitor.visit_expr(expr);
}
}
MethodTraitItem(ref sig, None) => {
visitor.visit_explicit_self(&sig.explicit_self);
visitor.visit_generics(&sig.generics);
walk_fn_decl(visitor, &sig.decl);
}
MethodTraitItem(ref sig, Some(ref body)) => {
visitor.visit_fn(FnKind::Method(trait_item.ident, sig, None), &sig.decl,
body, trait_item.span, trait_item.id);
}
TypeTraitItem(ref bounds, ref default) => {
walk_ty_param_bounds_helper(visitor, bounds);
walk_ty_opt(visitor, default);
}
}
}
pub fn walk_impl_item<'v, V: Visitor<'v>>(visitor: &mut V, impl_item: &'v ImplItem) {
visitor.visit_ident(impl_item.span, impl_item.ident);
for attr in &impl_item.attrs {
visitor.visit_attribute(attr);
}
match impl_item.node {
ConstImplItem(ref ty, ref expr) => {
visitor.visit_ty(ty);
visitor.visit_expr(expr);
}
MethodImplItem(ref sig, ref body) => {
visitor.visit_fn(FnKind::Method(impl_item.ident, sig, Some(impl_item.vis)), &sig.decl,
body, impl_item.span, impl_item.id);
}
TypeImplItem(ref ty) => {
visitor.visit_ty(ty);
}
MacImplItem(ref mac) => {
visitor.visit_mac(mac);
}
}
}
pub fn walk_struct_def<'v, V: Visitor<'v>>(visitor: &mut V,
struct_definition: &'v StructDef) {
for field in &struct_definition.fields {
visitor.visit_struct_field(field)
}
}
pub fn walk_struct_field<'v, V: Visitor<'v>>(visitor: &mut V,
struct_field: &'v StructField) {
if let NamedField(name, _) = struct_field.node.kind {
visitor.visit_ident(struct_field.span, name);
}
visitor.visit_ty(&*struct_field.node.ty);
for attr in &struct_field.node.attrs {
visitor.visit_attribute(attr);
}
}
pub fn walk_block<'v, V: Visitor<'v>>(visitor: &mut V, block: &'v Block) {
for statement in &block.stmts {
visitor.visit_stmt(&**statement)
}
walk_expr_opt(visitor, &block.expr)
}
pub fn walk_stmt<'v, V: Visitor<'v>>(visitor: &mut V, statement: &'v Stmt) {
match statement.node {
StmtDecl(ref declaration, _) => visitor.visit_decl(&**declaration),
StmtExpr(ref expression, _) | StmtSemi(ref expression, _) => {
visitor.visit_expr(&**expression)
}
StmtMac(ref mac, _) => visitor.visit_mac(&**mac),
}
}
pub fn walk_decl<'v, V: Visitor<'v>>(visitor: &mut V, declaration: &'v Decl) {
match declaration.node {
DeclLocal(ref local) => visitor.visit_local(&**local),
DeclItem(ref item) => visitor.visit_item(&**item),
}
}
pub fn walk_expr_opt<'v, V: Visitor<'v>>(visitor: &mut V,
optional_expression: &'v Option<P<Expr>>) {
match *optional_expression {
None => {}
Some(ref expression) => visitor.visit_expr(&**expression),
}
}
pub fn walk_exprs<'v, V: Visitor<'v>>(visitor: &mut V, expressions: &'v [P<Expr>]) {
for expression in expressions {
visitor.visit_expr(&**expression)
}
}
pub fn walk_mac<'v, V: Visitor<'v>>(_: &mut V, _: &'v Mac) {
}
pub fn walk_expr<'v, V: Visitor<'v>>(visitor: &mut V, expression: &'v Expr) {
match expression.node {
ExprBox(ref place, ref subexpression) => {
place.as_ref().map(|e|visitor.visit_expr(&**e));
visitor.visit_expr(&**subexpression)
}
ExprVec(ref subexpressions) => {
walk_exprs(visitor, subexpressions)
}
ExprRepeat(ref element, ref count) => {
visitor.visit_expr(&**element);
visitor.visit_expr(&**count)
}
ExprStruct(ref path, ref fields, ref optional_base) => {
visitor.visit_path(path, expression.id);
for field in fields {
visitor.visit_expr(&*field.expr)
}
walk_expr_opt(visitor, optional_base)
}
ExprTup(ref subexpressions) => {
for subexpression in subexpressions {
visitor.visit_expr(&**subexpression)
}
}
ExprCall(ref callee_expression, ref arguments) => {
for argument in arguments {
visitor.visit_expr(&**argument)
}
visitor.visit_expr(&**callee_expression)
}
ExprMethodCall(_, ref types, ref arguments) => {
walk_exprs(visitor, arguments);
for typ in types {
visitor.visit_ty(&**typ)
}
}
ExprBinary(_, ref left_expression, ref right_expression) => {
visitor.visit_expr(&**left_expression);
visitor.visit_expr(&**right_expression)
}
ExprAddrOf(_, ref subexpression) | ExprUnary(_, ref subexpression) => {
visitor.visit_expr(&**subexpression)
}
ExprLit(_) => {}
ExprCast(ref subexpression, ref typ) => {
visitor.visit_expr(&**subexpression);
visitor.visit_ty(&**typ)
}
ExprIf(ref head_expression, ref if_block, ref optional_else) => {
visitor.visit_expr(&**head_expression);
visitor.visit_block(&**if_block);
walk_expr_opt(visitor, optional_else)
}
ExprWhile(ref subexpression, ref block, _) => {
visitor.visit_expr(&**subexpression);
visitor.visit_block(&**block)
}
ExprIfLet(ref pattern, ref subexpression, ref if_block, ref optional_else) => {
visitor.visit_pat(&**pattern);
visitor.visit_expr(&**subexpression);
visitor.visit_block(&**if_block);
walk_expr_opt(visitor, optional_else);
}
ExprWhileLet(ref pattern, ref subexpression, ref block, _) => {
visitor.visit_pat(&**pattern);
visitor.visit_expr(&**subexpression);
visitor.visit_block(&**block);
}
ExprForLoop(ref pattern, ref subexpression, ref block, _) => {
visitor.visit_pat(&**pattern);
visitor.visit_expr(&**subexpression);
visitor.visit_block(&**block)
}
ExprLoop(ref block, _) => visitor.visit_block(&**block),
ExprMatch(ref subexpression, ref arms, _) => {
visitor.visit_expr(&**subexpression);
for arm in arms {
visitor.visit_arm(arm)
}
}
ExprClosure(_, ref function_declaration, ref body) => {
visitor.visit_fn(FnKind::Closure,
&**function_declaration,
&**body,
expression.span,
expression.id)
}
ExprBlock(ref block) => visitor.visit_block(&**block),
ExprAssign(ref left_hand_expression, ref right_hand_expression) => {
visitor.visit_expr(&**right_hand_expression);
visitor.visit_expr(&**left_hand_expression)
}
ExprAssignOp(_, ref left_expression, ref right_expression) => {
visitor.visit_expr(&**right_expression);
visitor.visit_expr(&**left_expression)
}
ExprField(ref subexpression, _) => {
visitor.visit_expr(&**subexpression);
}
ExprTupField(ref subexpression, _) => {
visitor.visit_expr(&**subexpression);
}
ExprIndex(ref main_expression, ref index_expression) => {
visitor.visit_expr(&**main_expression);
visitor.visit_expr(&**index_expression)
}
ExprRange(ref start, ref end) => {
walk_expr_opt(visitor, start);
walk_expr_opt(visitor, end)
}
ExprPath(ref maybe_qself, ref path) => {
if let Some(ref qself) = *maybe_qself {
visitor.visit_ty(&qself.ty);
}
visitor.visit_path(path, expression.id)
}
ExprBreak(_) | ExprAgain(_) => {}
ExprRet(ref optional_expression) => {
walk_expr_opt(visitor, optional_expression)
}
ExprMac(ref mac, _) => visitor.visit_mac(mac),
ExprParen(ref subexpression) => {
visitor.visit_expr(&**subexpression)
}
ExprInlineAsm(ref ia) => {
for input in &ia.inputs {
let (_, ref input) = *input;
visitor.visit_expr(&**input)
}
for output in &ia.outputs {
let (_, ref output, _) = *output;
visitor.visit_expr(&**output)
}
}
}
visitor.visit_expr_post(expression)
}
pub fn walk_arm<'v, V: Visitor<'v>>(visitor: &mut V, arm: &'v Arm) {
for pattern in &arm.pats {
visitor.visit_pat(&**pattern)
}
walk_expr_opt(visitor, &arm.guard);
visitor.visit_expr(&*arm.body);
for attr in &arm.attrs {
visitor.visit_attribute(attr);
}
}