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Fill in some missing parts in the default AST visitor

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+ Add helper macro for walking lists (including Options)
This commit is contained in:
Vadim Petrochenkov
2015-09-28 14:26:26 +03:00
parent 9e11845d77
commit eedb95101b
7 changed files with 272 additions and 354 deletions
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7
src/libsyntax/ast.rs
View File

@@ -1613,6 +1613,13 @@ impl PathListItem_ {
}
}
pub fn name(&self) -> Option<Ident> {
match *self {
PathListIdent { name, .. } => Some(name),
PathListMod { .. } => None,
}
}
pub fn rename(&self) -> Option<Ident> {
match *self {
PathListIdent { rename, .. } | PathListMod { rename, .. } => rename

4
src/libsyntax/ast_util.rs
View File

@@ -476,12 +476,12 @@ impl<'a, 'v, O: IdVisitingOperation> Visitor<'v> for IdVisitor<'a, O> {
visit::walk_impl_item(self, ii);
}
fn visit_lifetime_ref(&mut self, lifetime: &Lifetime) {
fn visit_lifetime(&mut self, lifetime: &Lifetime) {
self.operation.visit_id(lifetime.id);
}
fn visit_lifetime_def(&mut self, def: &LifetimeDef) {
self.visit_lifetime_ref(&def.lifetime);
self.visit_lifetime(&def.lifetime);
}
fn visit_trait_ref(&mut self, trait_ref: &TraitRef) {

9
src/libsyntax/owned_slice.rs
View File

@@ -12,6 +12,7 @@ use std::default::Default;
use std::fmt;
use std::iter::{IntoIterator, FromIterator};
use std::ops::Deref;
use std::slice;
use std::vec;
use serialize::{Encodable, Decodable, Encoder, Decoder};
@@ -82,6 +83,14 @@ impl<T> FromIterator<T> for OwnedSlice<T> {
}
}
impl<'a, T> IntoIterator for &'a OwnedSlice<T> {
type Item = &'a T;
type IntoIter = slice::Iter<'a, T>;
fn into_iter(self) -> Self::IntoIter {
self.data.into_iter()
}
}
impl<T: Encodable> Encodable for OwnedSlice<T> {
fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> {
Encodable::encode(&**self, s)

582
src/libsyntax/visit.rs
View File

@@ -1,4 +1,4 @@
// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
@@ -25,10 +25,7 @@
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> {
@@ -56,7 +53,7 @@ pub trait Visitor<'v> : Sized {
// Nothing to do.
}
fn visit_ident(&mut self, span: Span, ident: Ident) {
self.visit_name(span, ident.name);
walk_ident(self, span, ident);
}
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) }
@@ -94,21 +91,8 @@ pub trait Visitor<'v> : Sized {
fn visit_variant(&mut self, v: &'v Variant, g: &'v Generics) { walk_variant(self, v, g) }
/// Visits an optional reference to a lifetime. The `span` is the span of some surrounding
/// reference should opt_lifetime be None.
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(&mut self, lifetime: &'v Lifetime) {
walk_lifetime(self, lifetime)
}
fn visit_lifetime_def(&mut self, lifetime: &'v LifetimeDef) {
walk_lifetime_def(self, lifetime)
@@ -124,7 +108,7 @@ pub trait Visitor<'v> : Sized {
// definition in your trait impl:
// visit::walk_mac(self, _mac)
}
fn visit_path(&mut self, path: &'v Path, _id: ast::NodeId) {
fn visit_path(&mut self, path: &'v Path, _id: NodeId) {
walk_path(self, path)
}
fn visit_path_list_item(&mut self, prefix: &'v Path, item: &'v PathListItem) {
@@ -140,53 +124,83 @@ pub trait Visitor<'v> : Sized {
walk_assoc_type_binding(self, type_binding)
}
fn visit_attribute(&mut self, _attr: &'v Attribute) {}
fn visit_macro_def(&mut self, macro_def: &'v MacroDef) {
walk_macro_def(self, macro_def)
}
}
#[macro_export]
macro_rules! walk_list {
($visitor: ident, $method: ident, $list: expr) => {
for elem in $list {
$visitor.$method(elem)
}
}
}
pub fn walk_opt_name<'v, V: Visitor<'v>>(visitor: &mut V, span: Span, opt_name: Option<Name>) {
for name in opt_name {
visitor.visit_name(span, name);
}
}
pub fn walk_opt_ident<'v, V: Visitor<'v>>(visitor: &mut V, span: Span, opt_ident: Option<Ident>) {
for ident in opt_ident {
visitor.visit_ident(span, ident);
}
}
pub fn walk_ident<'v, V: Visitor<'v>>(visitor: &mut V, span: Span, ident: Ident) {
visitor.visit_name(span, ident.name);
}
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);
}
walk_list!(visitor, visit_attribute, &krate.attrs);
walk_list!(visitor, visit_macro_def, &krate.exported_macros);
}
pub fn walk_macro_def<'v, V: Visitor<'v>>(visitor: &mut V, macro_def: &'v MacroDef) {
visitor.visit_ident(macro_def.span, macro_def.ident);
walk_opt_ident(visitor, macro_def.span, macro_def.imported_from);
walk_list!(visitor, visit_attribute, &macro_def.attrs);
}
pub fn walk_mod<'v, V: Visitor<'v>>(visitor: &mut V, module: &'v Mod) {
for item in &module.items {
visitor.visit_item(&**item)
}
walk_list!(visitor, visit_item, &module.items);
}
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);
visitor.visit_pat(&local.pat);
walk_list!(visitor, visit_ty, &local.ty);
walk_list!(visitor, visit_expr, &local.init);
}
pub fn walk_lifetime<'v, V: Visitor<'v>>(visitor: &mut V, lifetime: &'v Lifetime) {
visitor.visit_name(lifetime.span, lifetime.name);
}
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)
visitor.visit_lifetime(&lifetime_def.lifetime);
walk_list!(visitor, visit_lifetime, &lifetime_def.bounds);
}
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)
SelfStatic => {},
SelfValue(ident) => {
visitor.visit_ident(explicit_self.span, ident)
}
SelfRegion(ref opt_lifetime, _, ident) => {
visitor.visit_ident(explicit_self.span, ident);
walk_list!(visitor, visit_lifetime, opt_lifetime);
}
SelfExplicit(ref typ, ident) => {
visitor.visit_ident(explicit_self.span, ident);
visitor.visit_ty(typ)
}
SelfExplicit(ref typ, _) => visitor.visit_ty(&**typ),
}
}
@@ -195,7 +209,7 @@ pub fn walk_poly_trait_ref<'v, V>(visitor: &mut V,
_modifier: &'v TraitBoundModifier)
where V: Visitor<'v>
{
walk_lifetime_decls_helper(visitor, &trait_ref.bound_lifetimes);
walk_list!(visitor, visit_lifetime_def, &trait_ref.bound_lifetimes);
visitor.visit_trait_ref(&trait_ref.trait_ref);
}
@@ -209,10 +223,13 @@ pub fn walk_trait_ref<'v,V>(visitor: &mut V,
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(..) => {}
ItemExternCrate(opt_name) => {
walk_opt_name(visitor, item.span, opt_name)
}
ItemUse(ref vp) => {
match vp.node {
ViewPathSimple(_ident, ref path) => {
ViewPathSimple(ident, ref path) => {
visitor.visit_ident(vp.span, ident);
visitor.visit_path(path, item.id);
}
ViewPathGlob(ref path) => {
@@ -231,14 +248,14 @@ pub fn walk_item<'v, V: Visitor<'v>>(visitor: &mut V, item: &'v Item) {
}
ItemStatic(ref typ, _, ref expr) |
ItemConst(ref typ, ref expr) => {
visitor.visit_ty(&**typ);
visitor.visit_expr(&**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,
declaration,
body,
item.span,
item.id)
}
@@ -246,12 +263,10 @@ pub fn walk_item<'v, V: Visitor<'v>>(visitor: &mut V, item: &'v Item) {
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)
}
walk_list!(visitor, visit_foreign_item, &foreign_module.items);
}
ItemTy(ref typ, ref type_parameters) => {
visitor.visit_ty(&**typ);
visitor.visit_ty(typ);
visitor.visit_generics(type_parameters)
}
ItemEnum(ref enum_definition, ref type_parameters) => {
@@ -263,45 +278,36 @@ pub fn walk_item<'v, V: Visitor<'v>>(visitor: &mut V, item: &'v Item) {
}
ItemImpl(_, _,
ref type_parameters,
ref trait_reference,
ref opt_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);
}
walk_list!(visitor, visit_trait_ref, opt_trait_reference);
visitor.visit_ty(typ);
walk_list!(visitor, visit_impl_item, impl_items);
}
ItemStruct(ref struct_definition, ref generics) => {
visitor.visit_generics(generics);
visitor.visit_struct_def(&**struct_definition,
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)
}
walk_list!(visitor, visit_ty_param_bound, bounds);
walk_list!(visitor, visit_trait_item, methods);
}
ItemMac(ref mac) => visitor.visit_mac(mac),
}
for attr in &item.attrs {
visitor.visit_attribute(attr);
}
walk_list!(visitor, visit_attribute, &item.attrs);
}
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);
visitor.visit_variant(variant, generics);
}
}
@@ -313,79 +319,58 @@ pub fn walk_variant<'v, V: Visitor<'v>>(visitor: &mut V,
match variant.node.kind {
TupleVariantKind(ref variant_arguments) => {
for variant_argument in variant_arguments {
visitor.visit_ty(&*variant_argument.ty)
visitor.visit_ty(&variant_argument.ty)
}
}
StructVariantKind(ref struct_definition) => {
visitor.visit_struct_def(&**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) {
// Empty!
}
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 => ()
}
walk_list!(visitor, visit_expr, &variant.node.disr_expr);
walk_list!(visitor, visit_attribute, &variant.node.attrs);
}
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)
visitor.visit_ty(ty)
}
TyPtr(ref mutable_type) => {
visitor.visit_ty(&*mutable_type.ty)
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)
TyRptr(ref opt_lifetime, ref mutable_type) => {
walk_list!(visitor, visit_lifetime, opt_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)
}
walk_list!(visitor, visit_ty, tuple_element_types);
}
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);
walk_fn_decl(visitor, &function_declaration.decl);
walk_list!(visitor, visit_lifetime_def, &function_declaration.lifetimes);
}
TyPath(ref maybe_qself, ref path) => {
if let Some(ref qself) = *maybe_qself {
for qself in 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);
visitor.visit_ty(ty);
walk_list!(visitor, visit_ty_param_bound, bounds);
}
TyFixedLengthVec(ref ty, ref expression) => {
visitor.visit_ty(&**ty);
visitor.visit_expr(&**expression)
visitor.visit_ty(ty);
visitor.visit_expr(expression)
}
TyPolyTraitRef(ref bounds) => {
walk_ty_param_bounds_helper(visitor, bounds)
walk_list!(visitor, visit_ty_param_bound, bounds);
}
TyTypeof(ref expression) => {
visitor.visit_expr(&**expression)
visitor.visit_expr(expression)
}
TyInfer => {}
TyMac(ref mac) => {
@@ -394,13 +379,6 @@ pub fn walk_ty<'v, V: Visitor<'v>>(visitor: &mut V, typ: &'v Ty) {
}
}
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);
@@ -413,9 +391,8 @@ pub fn walk_path_list_item<'v, V: Visitor<'v>>(visitor: &mut V, prefix: &'v Path
visitor.visit_path_segment(prefix.span, segment);
}
if let PathListIdent { name, .. } = item.node {
visitor.visit_ident(item.span, name);
}
walk_opt_ident(visitor, item.span, item.node.name());
walk_opt_ident(visitor, item.span, item.node.rename());
}
pub fn walk_path_segment<'v, V: Visitor<'v>>(visitor: &mut V,
@@ -429,24 +406,14 @@ 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);
}
AngleBracketedParameters(ref data) => {
walk_list!(visitor, visit_ty, &data.types);
walk_list!(visitor, visit_lifetime, &data.lifetimes);
walk_list!(visitor, visit_assoc_type_binding, &data.bindings);
}
ast::ParenthesizedParameters(ref data) => {
for typ in &data.inputs {
visitor.visit_ty(&**typ);
}
if let Some(ref typ) = data.output {
visitor.visit_ty(&**typ);
}
ParenthesizedParameters(ref data) => {
walk_list!(visitor, visit_ty, &data.inputs);
walk_list!(visitor, visit_ty, &data.output);
}
}
}
@@ -454,17 +421,15 @@ pub fn walk_path_parameters<'v, V: Visitor<'v>>(visitor: &mut V,
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);
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) => {
PatEnum(ref path, ref opt_children) => {
visitor.visit_path(path, pattern.id);
if let Some(ref children) = *children {
for child in children {
visitor.visit_pat(&*child)
}
for children in opt_children {
walk_list!(visitor, visit_pat, children);
}
}
PatQPath(ref qself, ref path) => {
@@ -474,41 +439,31 @@ pub fn walk_pat<'v, V: Visitor<'v>>(visitor: &mut V, pattern: &'v Pat) {
PatStruct(ref path, ref fields, _) => {
visitor.visit_path(path, pattern.id);
for field in fields {
visitor.visit_pat(&*field.node.pat)
visitor.visit_ident(field.span, field.node.ident);
visitor.visit_pat(&field.node.pat)
}
}
PatTup(ref tuple_elements) => {
for tuple_element in tuple_elements {
visitor.visit_pat(&**tuple_element)
}
walk_list!(visitor, visit_pat, tuple_elements);
}
PatBox(ref subpattern) |
PatRegion(ref subpattern, _) => {
visitor.visit_pat(&**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),
}
walk_list!(visitor, visit_pat, optional_subpattern);
}
PatLit(ref expression) => visitor.visit_expr(&**expression),
PatLit(ref expression) => visitor.visit_expr(expression),
PatRange(ref lower_bound, ref upper_bound) => {
visitor.visit_expr(&**lower_bound);
visitor.visit_expr(&**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)
}
PatVec(ref prepatterns, ref slice_pattern, ref postpatterns) => {
walk_list!(visitor, visit_pat, prepatterns);
walk_list!(visitor, visit_pat, slice_pattern);
walk_list!(visitor, visit_pat, postpatterns);
}
PatMac(ref mac) => visitor.visit_mac(mac),
}
@@ -520,22 +475,13 @@ pub fn walk_foreign_item<'v, V: Visitor<'v>>(visitor: &mut V,
match foreign_item.node {
ForeignItemFn(ref function_declaration, ref generics) => {
walk_fn_decl(visitor, &**function_declaration);
walk_fn_decl(visitor, function_declaration);
visitor.visit_generics(generics)
}
ForeignItemStatic(ref typ, _) => visitor.visit_ty(&**typ),
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)
}
walk_list!(visitor, visit_attribute, &foreign_item.attrs);
}
pub fn walk_ty_param_bound<'v, V: Visitor<'v>>(visitor: &mut V,
@@ -545,58 +491,53 @@ pub fn walk_ty_param_bound<'v, V: Visitor<'v>>(visitor: &mut V,
visitor.visit_poly_trait_ref(typ, modifier);
}
RegionTyParamBound(ref lifetime) => {
visitor.visit_lifetime_bound(lifetime);
visitor.visit_lifetime(lifetime);
}
}
}
pub fn walk_generics<'v, V: Visitor<'v>>(visitor: &mut V, generics: &'v Generics) {
for param in generics.ty_params.iter() {
for param in &generics.ty_params {
visitor.visit_ident(param.span, param.ident);
walk_ty_param_bounds_helper(visitor, &param.bounds);
walk_ty_opt(visitor, &param.default);
walk_list!(visitor, visit_ty_param_bound, &param.bounds);
walk_list!(visitor, visit_ty, &param.default);
}
walk_lifetime_decls_helper(visitor, &generics.lifetimes);
walk_list!(visitor, visit_lifetime_def, &generics.lifetimes);
for predicate in &generics.where_clause.predicates {
match predicate {
&ast::WherePredicate::BoundPredicate(ast::WhereBoundPredicate{ref bounded_ty,
&WherePredicate::BoundPredicate(WhereBoundPredicate{ref bounded_ty,
ref bounds,
ref bound_lifetimes,
..}) => {
visitor.visit_ty(&**bounded_ty);
walk_ty_param_bounds_helper(visitor, bounds);
visitor.visit_ty(bounded_ty);
walk_list!(visitor, visit_ty_param_bound, bounds);
walk_list!(visitor, visit_lifetime_def, bound_lifetimes);
}
&ast::WherePredicate::RegionPredicate(ast::WhereRegionPredicate{ref lifetime,
&WherePredicate::RegionPredicate(WhereRegionPredicate{ref lifetime,
ref bounds,
..}) => {
visitor.visit_lifetime_ref(lifetime);
for bound in bounds {
visitor.visit_lifetime_ref(bound);
}
visitor.visit_lifetime(lifetime);
walk_list!(visitor, visit_lifetime, bounds);
}
&ast::WherePredicate::EqPredicate(ast::WhereEqPredicate{id,
&WherePredicate::EqPredicate(WhereEqPredicate{id,
ref path,
ref ty,
..}) => {
visitor.visit_path(path, id);
visitor.visit_ty(&**ty);
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)
visitor.visit_pat(&argument.pat);
visitor.visit_ty(&argument.ty)
}
if let Return(ref output_ty) = function_declaration.output {
visitor.visit_ty(output_ty)
}
walk_fn_ret_ty(visitor, &function_declaration.output)
}
pub fn walk_fn<'v, V: Visitor<'v>>(visitor: &mut V,
@@ -614,7 +555,7 @@ pub fn walk_fn<'v, V: Visitor<'v>>(visitor: &mut V,
visitor.visit_generics(&sig.generics);
visitor.visit_explicit_self(&sig.explicit_self);
}
FnKind::Closure(..) => {}
FnKind::Closure => {}
}
visitor.visit_block(function_body)
@@ -622,15 +563,11 @@ pub fn walk_fn<'v, V: Visitor<'v>>(visitor: &mut V,
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);
}
walk_list!(visitor, visit_attribute, &trait_item.attrs);
match trait_item.node {
ConstTraitItem(ref ty, ref default) => {
visitor.visit_ty(ty);
if let Some(ref expr) = *default {
visitor.visit_expr(expr);
}
walk_list!(visitor, visit_expr, default);
}
MethodTraitItem(ref sig, None) => {
visitor.visit_explicit_self(&sig.explicit_self);
@@ -642,17 +579,15 @@ pub fn walk_trait_item<'v, V: Visitor<'v>>(visitor: &mut V, trait_item: &'v Trai
body, trait_item.span, trait_item.id);
}
TypeTraitItem(ref bounds, ref default) => {
walk_ty_param_bounds_helper(visitor, bounds);
walk_ty_opt(visitor, default);
walk_list!(visitor, visit_ty_param_bound, bounds);
walk_list!(visitor, visit_ty, 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);
}
walk_list!(visitor, visit_attribute, &impl_item.attrs);
match impl_item.node {
ConstImplItem(ref ty, ref expr) => {
visitor.visit_ty(ty);
@@ -673,59 +608,35 @@ pub fn walk_impl_item<'v, V: Visitor<'v>>(visitor: &mut V, impl_item: &'v ImplIt
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)
}
walk_list!(visitor, visit_struct_field, &struct_definition.fields);
}
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);
}
walk_opt_ident(visitor, struct_field.span, struct_field.node.ident());
visitor.visit_ty(&struct_field.node.ty);
walk_list!(visitor, visit_attribute, &struct_field.node.attrs);
}
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)
walk_list!(visitor, visit_stmt, &block.stmts);
walk_list!(visitor, visit_expr, &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),
StmtDecl(ref declaration, _) => visitor.visit_decl(declaration),
StmtExpr(ref expression, _) | StmtSemi(ref expression, _) => {
visitor.visit_expr(&**expression)
visitor.visit_expr(expression)
}
StmtMac(ref mac, _) => visitor.visit_mac(&**mac),
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)
DeclLocal(ref local) => visitor.visit_local(local),
DeclItem(ref item) => visitor.visit_item(item),
}
}
@@ -736,139 +647,142 @@ 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 subexpression) => {
visitor.visit_expr(&**subexpression)
visitor.visit_expr(subexpression)
}
ExprInPlace(ref place, ref subexpression) => {
visitor.visit_expr(&**place);
visitor.visit_expr(&**subexpression)
visitor.visit_expr(place);
visitor.visit_expr(subexpression)
}
ExprVec(ref subexpressions) => {
walk_exprs(visitor, subexpressions)
walk_list!(visitor, visit_expr, subexpressions);
}
ExprRepeat(ref element, ref count) => {
visitor.visit_expr(&**element);
visitor.visit_expr(&**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)
visitor.visit_ident(field.ident.span, field.ident.node);
visitor.visit_expr(&field.expr)
}
walk_expr_opt(visitor, optional_base)
walk_list!(visitor, visit_expr, optional_base);
}
ExprTup(ref subexpressions) => {
for subexpression in subexpressions {
visitor.visit_expr(&**subexpression)
}
walk_list!(visitor, visit_expr, subexpressions);
}
ExprCall(ref callee_expression, ref arguments) => {
for argument in arguments {
visitor.visit_expr(&**argument)
}
visitor.visit_expr(&**callee_expression)
walk_list!(visitor, visit_expr, arguments);
visitor.visit_expr(callee_expression)
}
ExprMethodCall(_, ref types, ref arguments) => {
walk_exprs(visitor, arguments);
for typ in types {
visitor.visit_ty(&**typ)
}
ExprMethodCall(ref ident, ref types, ref arguments) => {
visitor.visit_ident(ident.span, ident.node);
walk_list!(visitor, visit_expr, arguments);
walk_list!(visitor, visit_ty, types);
}
ExprBinary(_, ref left_expression, ref right_expression) => {
visitor.visit_expr(&**left_expression);
visitor.visit_expr(&**right_expression)
visitor.visit_expr(left_expression);
visitor.visit_expr(right_expression)
}
ExprAddrOf(_, ref subexpression) | ExprUnary(_, ref subexpression) => {
visitor.visit_expr(&**subexpression)
visitor.visit_expr(subexpression)
}
ExprLit(_) => {}
ExprCast(ref subexpression, ref typ) => {
visitor.visit_expr(&**subexpression);
visitor.visit_ty(&**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)
visitor.visit_expr(head_expression);
visitor.visit_block(if_block);
walk_list!(visitor, visit_expr, optional_else);
}
ExprWhile(ref subexpression, ref block, _) => {
visitor.visit_expr(&**subexpression);
visitor.visit_block(&**block)
ExprWhile(ref subexpression, ref block, opt_ident) => {
visitor.visit_expr(subexpression);
visitor.visit_block(block);
walk_opt_ident(visitor, expression.span, opt_ident)
}
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);
visitor.visit_pat(pattern);
visitor.visit_expr(subexpression);
visitor.visit_block(if_block);
walk_list!(visitor, visit_expr, optional_else);
}
ExprWhileLet(ref pattern, ref subexpression, ref block, _) => {
visitor.visit_pat(&**pattern);
visitor.visit_expr(&**subexpression);
visitor.visit_block(&**block);
ExprWhileLet(ref pattern, ref subexpression, ref block, opt_ident) => {
visitor.visit_pat(pattern);
visitor.visit_expr(subexpression);
visitor.visit_block(block);
walk_opt_ident(visitor, expression.span, opt_ident)
}
ExprForLoop(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, opt_ident) => {
visitor.visit_pat(pattern);
visitor.visit_expr(subexpression);
visitor.visit_block(block);
walk_opt_ident(visitor, expression.span, opt_ident)
}
ExprLoop(ref block, opt_ident) => {
visitor.visit_block(block);
walk_opt_ident(visitor, expression.span, opt_ident)
}
ExprLoop(ref block, _) => visitor.visit_block(&**block),
ExprMatch(ref subexpression, ref arms, _) => {
visitor.visit_expr(&**subexpression);
for arm in arms {
visitor.visit_arm(arm)
}
visitor.visit_expr(subexpression);
walk_list!(visitor, visit_arm, arms);
}
ExprClosure(_, ref function_declaration, ref body) => {
visitor.visit_fn(FnKind::Closure,
&**function_declaration,
&**body,
function_declaration,
body,
expression.span,
expression.id)
}
ExprBlock(ref block) => visitor.visit_block(&**block),
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)
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)
visitor.visit_expr(right_expression);
visitor.visit_expr(left_expression)
}
ExprField(ref subexpression, _) => {
visitor.visit_expr(&**subexpression);
ExprField(ref subexpression, ref ident) => {
visitor.visit_expr(subexpression);
visitor.visit_ident(ident.span, ident.node);
}
ExprTupField(ref subexpression, _) => {
visitor.visit_expr(&**subexpression);
visitor.visit_expr(subexpression);
}
ExprIndex(ref main_expression, ref index_expression) => {
visitor.visit_expr(&**main_expression);
visitor.visit_expr(&**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)
walk_list!(visitor, visit_expr, start);
walk_list!(visitor, visit_expr, end);
}
ExprPath(ref maybe_qself, ref path) => {
if let Some(ref qself) = *maybe_qself {
for qself in maybe_qself {
visitor.visit_ty(&qself.ty);
}
visitor.visit_path(path, expression.id)
}
ExprBreak(_) | ExprAgain(_) => {}
ExprBreak(ref opt_sp_ident) | ExprAgain(ref opt_sp_ident) => {
for sp_ident in opt_sp_ident {
visitor.visit_ident(sp_ident.span, sp_ident.node);
}
}
ExprRet(ref optional_expression) => {
walk_expr_opt(visitor, optional_expression)
walk_list!(visitor, visit_expr, optional_expression);
}
ExprMac(ref mac) => visitor.visit_mac(mac),
ExprParen(ref subexpression) => {
visitor.visit_expr(&**subexpression)
visitor.visit_expr(subexpression)
}
ExprInlineAsm(ref ia) => {
for input in &ia.inputs {
let (_, ref input) = *input;
visitor.visit_expr(&**input)
for &(_, ref input) in &ia.inputs {
visitor.visit_expr(&input)
}
for output in &ia.outputs {
let (_, ref output, _) = *output;
visitor.visit_expr(&**output)
for &(_, ref output, _) in &ia.outputs {
visitor.visit_expr(&output)
}
}
}
@@ -877,12 +791,8 @@ pub fn walk_expr<'v, V: Visitor<'v>>(visitor: &mut V, expression: &'v Expr) {
}
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);
}
walk_list!(visitor, visit_pat, &arm.pats);
walk_list!(visitor, visit_expr, &arm.guard);
visitor.visit_expr(&arm.body);
walk_list!(visitor, visit_attribute, &arm.attrs);
}