481 lines
16 KiB
Rust
481 lines
16 KiB
Rust
#![allow(print_stdout, use_debug)]
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//! checks for attributes
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use rustc::lint::*;
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use rustc::hir;
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use syntax::ast::Attribute;
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use syntax::attr;
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/// **What it does:** Dumps every ast/hir node which has the `#[clippy_dump]` attribute
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///
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/// **Example:**
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/// ```rust
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/// #[clippy_dump]
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/// extern crate foo;
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/// ```
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///
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/// prints
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///
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/// ```
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/// item `foo`
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/// visibility inherited from outer item
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/// extern crate dylib source: "/path/to/foo.so"
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/// ```
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declare_lint! {
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pub DEEP_CODE_INSPECTION,
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Warn,
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"helper to dump info about code"
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}
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pub struct Pass;
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impl LintPass for Pass {
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fn get_lints(&self) -> LintArray {
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lint_array!(DEEP_CODE_INSPECTION)
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}
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}
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impl LateLintPass for Pass {
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fn check_item(&mut self, cx: &LateContext, item: &hir::Item) {
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if !has_attr(&item.attrs) {
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return;
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}
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print_item(cx, item);
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}
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fn check_impl_item(&mut self, cx: &LateContext, item: &hir::ImplItem) {
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if !has_attr(&item.attrs) {
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return;
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}
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println!("impl item `{}`", item.name);
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match item.vis {
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hir::Visibility::Public => println!("public"),
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hir::Visibility::Crate => println!("visible crate wide"),
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hir::Visibility::Restricted { ref path, .. } => println!("visible in module `{}`", path),
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hir::Visibility::Inherited => println!("visibility inherited from outer item"),
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}
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if item.defaultness.is_default() {
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println!("default");
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}
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match item.node {
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hir::ImplItemKind::Const(_, ref e) => {
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println!("associated constant");
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print_expr(cx, e, 1);
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},
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hir::ImplItemKind::Method(..) => println!("method"),
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hir::ImplItemKind::Type(_) => println!("associated type"),
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}
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}
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/*
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fn check_trait_item(&mut self, cx: &LateContext, item: &hir::TraitItem) {
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if !has_attr(&item.attrs) {
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return;
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}
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}
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fn check_variant(&mut self, cx: &LateContext, var: &hir::Variant, _: &hir::Generics) {
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if !has_attr(&var.node.attrs) {
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return;
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}
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}
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fn check_struct_field(&mut self, cx: &LateContext, field: &hir::StructField) {
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if !has_attr(&field.attrs) {
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return;
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}
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}
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*/
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fn check_expr(&mut self, cx: &LateContext, expr: &hir::Expr) {
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if !has_attr(&expr.attrs) {
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return;
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}
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print_expr(cx, expr, 0);
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}
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fn check_arm(&mut self, cx: &LateContext, arm: &hir::Arm) {
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if !has_attr(&arm.attrs) {
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return;
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}
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for pat in &arm.pats {
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print_pat(cx, pat, 1);
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}
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if let Some(ref guard) = arm.guard {
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println!("guard:");
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print_expr(cx, guard, 1);
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}
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println!("body:");
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print_expr(cx, &arm.body, 1);
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}
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fn check_stmt(&mut self, cx: &LateContext, stmt: &hir::Stmt) {
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if !has_attr(stmt.node.attrs()) {
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return;
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}
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match stmt.node {
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hir::StmtDecl(ref decl, _) => print_decl(cx, decl),
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hir::StmtExpr(ref e, _) | hir::StmtSemi(ref e, _) => print_expr(cx, e, 0),
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}
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}
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/*
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fn check_foreign_item(&mut self, cx: &LateContext, item: &hir::ForeignItem) {
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if !has_attr(&item.attrs) {
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return;
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}
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}
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*/
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}
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fn has_attr(attrs: &[Attribute]) -> bool {
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attr::contains_name(attrs, "clippy_dump")
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}
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fn print_decl(cx: &LateContext, decl: &hir::Decl) {
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match decl.node {
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hir::DeclLocal(ref local) => {
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println!("local variable of type {}", cx.tcx.node_id_to_type(local.id));
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println!("pattern:");
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print_pat(cx, &local.pat, 0);
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if let Some(ref e) = local.init {
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println!("init expression:");
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print_expr(cx, e, 0);
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}
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},
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hir::DeclItem(_) => println!("item decl"),
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}
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}
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fn print_expr(cx: &LateContext, expr: &hir::Expr, indent: usize) {
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let ind = " ".repeat(indent);
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let ty = cx.tcx.node_id_to_type(expr.id);
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println!("{}+", ind);
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match expr.node {
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hir::ExprBox(ref e) => {
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println!("{}Box, {}", ind, ty);
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print_expr(cx, e, indent + 1);
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},
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hir::ExprArray(ref v) => {
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println!("{}Array, {}", ind, ty);
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for e in v {
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print_expr(cx, e, indent + 1);
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}
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},
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hir::ExprCall(ref func, ref args) => {
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println!("{}Call, {}", ind, ty);
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println!("{}function:", ind);
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print_expr(cx, func, indent + 1);
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println!("{}arguments:", ind);
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for arg in args {
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print_expr(cx, arg, indent + 1);
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}
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},
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hir::ExprMethodCall(ref name, _, ref args) => {
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println!("{}MethodCall, {}", ind, ty);
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println!("{}method name: {}", ind, name.node);
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for arg in args {
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print_expr(cx, arg, indent + 1);
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}
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},
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hir::ExprTup(ref v) => {
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println!("{}Tup, {}", ind, ty);
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for e in v {
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print_expr(cx, e, indent + 1);
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}
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},
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hir::ExprBinary(op, ref lhs, ref rhs) => {
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println!("{}Binary, {}", ind, ty);
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println!("{}op: {:?}", ind, op.node);
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println!("{}lhs:", ind);
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print_expr(cx, lhs, indent + 1);
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println!("{}rhs:", ind);
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print_expr(cx, rhs, indent + 1);
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},
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hir::ExprUnary(op, ref inner) => {
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println!("{}Unary, {}", ind, ty);
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println!("{}op: {:?}", ind, op);
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print_expr(cx, inner, indent + 1);
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},
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hir::ExprLit(ref lit) => {
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println!("{}Lit, {}", ind, ty);
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println!("{}{:?}", ind, lit);
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},
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hir::ExprCast(ref e, ref target) => {
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println!("{}Cast, {}", ind, ty);
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print_expr(cx, e, indent + 1);
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println!("{}target type: {:?}", ind, target);
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},
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hir::ExprType(ref e, ref target) => {
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println!("{}Type, {}", ind, ty);
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print_expr(cx, e, indent + 1);
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println!("{}target type: {:?}", ind, target);
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},
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hir::ExprIf(ref e, _, ref els) => {
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println!("{}If, {}", ind, ty);
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println!("{}condition:", ind);
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print_expr(cx, e, indent + 1);
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if let Some(ref els) = *els {
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println!("{}else:", ind);
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print_expr(cx, els, indent + 1);
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}
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},
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hir::ExprWhile(ref cond, _, _) => {
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println!("{}While, {}", ind, ty);
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println!("{}condition:", ind);
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print_expr(cx, cond, indent + 1);
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},
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hir::ExprLoop(..) => {
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println!("{}Loop, {}", ind, ty);
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},
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hir::ExprMatch(ref cond, _, ref source) => {
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println!("{}Match, {}", ind, ty);
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println!("{}condition:", ind);
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print_expr(cx, cond, indent + 1);
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println!("{}source: {:?}", ind, source);
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},
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hir::ExprClosure(ref clause, _, _, _) => {
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println!("{}Closure, {}", ind, ty);
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println!("{}clause: {:?}", ind, clause);
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},
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hir::ExprBlock(_) => {
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println!("{}Block, {}", ind, ty);
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},
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hir::ExprAssign(ref lhs, ref rhs) => {
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println!("{}Assign, {}", ind, ty);
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println!("{}lhs:", ind);
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print_expr(cx, lhs, indent + 1);
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println!("{}rhs:", ind);
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print_expr(cx, rhs, indent + 1);
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},
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hir::ExprAssignOp(ref binop, ref lhs, ref rhs) => {
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println!("{}AssignOp, {}", ind, ty);
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println!("{}op: {:?}", ind, binop.node);
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println!("{}lhs:", ind);
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print_expr(cx, lhs, indent + 1);
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println!("{}rhs:", ind);
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print_expr(cx, rhs, indent + 1);
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},
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hir::ExprField(ref e, ref name) => {
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println!("{}Field, {}", ind, ty);
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println!("{}field name: {}", ind, name.node);
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println!("{}struct expr:", ind);
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print_expr(cx, e, indent + 1);
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},
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hir::ExprTupField(ref e, ref idx) => {
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println!("{}TupField, {}", ind, ty);
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println!("{}field index: {}", ind, idx.node);
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println!("{}tuple expr:", ind);
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print_expr(cx, e, indent + 1);
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},
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hir::ExprIndex(ref arr, ref idx) => {
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println!("{}Index, {}", ind, ty);
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println!("{}array expr:", ind);
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print_expr(cx, arr, indent + 1);
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println!("{}index expr:", ind);
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print_expr(cx, idx, indent + 1);
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},
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hir::ExprPath(ref sel, ref path) => {
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println!("{}Path, {}", ind, ty);
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println!("{}self: {:?}", ind, sel);
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println!("{}path: {:?}", ind, path);
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},
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hir::ExprAddrOf(ref muta, ref e) => {
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println!("{}AddrOf, {}", ind, ty);
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println!("mutability: {:?}", muta);
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print_expr(cx, e, indent + 1);
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},
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hir::ExprBreak(_) => println!("{}Break, {}", ind, ty),
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hir::ExprAgain(_) => println!("{}Again, {}", ind, ty),
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hir::ExprRet(ref e) => {
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println!("{}Ret, {}", ind, ty);
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if let Some(ref e) = *e {
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print_expr(cx, e, indent + 1);
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}
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},
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hir::ExprInlineAsm(_, ref input, ref output) => {
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println!("{}InlineAsm, {}", ind, ty);
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println!("{}inputs:", ind);
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for e in input {
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print_expr(cx, e, indent + 1);
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}
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println!("{}outputs:", ind);
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for e in output {
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print_expr(cx, e, indent + 1);
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}
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},
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hir::ExprStruct(ref path, ref fields, ref base) => {
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println!("{}Struct, {}", ind, ty);
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println!("{}path: {:?}", ind, path);
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for field in fields {
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println!("{}field \"{}\":", ind, field.name.node);
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print_expr(cx, &field.expr, indent + 1);
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}
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if let Some(ref base) = *base {
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println!("{}base:", ind);
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print_expr(cx, base, indent + 1);
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}
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},
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hir::ExprRepeat(ref val, ref n) => {
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println!("{}Repeat, {}", ind, ty);
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println!("{}value:", ind);
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print_expr(cx, val, indent + 1);
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println!("{}repeat count:", ind);
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print_expr(cx, n, indent + 1);
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},
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}
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}
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fn print_item(cx: &LateContext, item: &hir::Item) {
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let did = cx.tcx.map.local_def_id(item.id);
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println!("item `{}`", item.name);
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match item.vis {
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hir::Visibility::Public => println!("public"),
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hir::Visibility::Crate => println!("visible crate wide"),
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hir::Visibility::Restricted { ref path, .. } => println!("visible in module `{}`", path),
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hir::Visibility::Inherited => println!("visibility inherited from outer item"),
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}
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match item.node {
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hir::ItemExternCrate(ref _renamed_from) => {
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if let Some(crate_id) = cx.tcx.sess.cstore.extern_mod_stmt_cnum(item.id) {
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let source = cx.tcx.sess.cstore.used_crate_source(crate_id);
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if let Some(src) = source.dylib {
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println!("extern crate dylib source: {:?}", src.0);
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}
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if let Some(src) = source.rlib {
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println!("extern crate rlib source: {:?}", src.0);
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}
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} else {
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println!("weird extern crate without a crate id");
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}
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}
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hir::ItemUse(ref path) => println!("{:?}", path.node),
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hir::ItemStatic(..) => println!("static item: {:#?}", cx.tcx.opt_lookup_item_type(did)),
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hir::ItemConst(..) => println!("const item: {:#?}", cx.tcx.opt_lookup_item_type(did)),
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hir::ItemFn(..) => {
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let item_ty = cx.tcx.opt_lookup_item_type(did);
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println!("function: {:#?}", item_ty);
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},
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hir::ItemMod(..) => println!("module"),
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hir::ItemForeignMod(ref fm) => println!("foreign module with abi: {}", fm.abi),
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hir::ItemTy(..) => {
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println!("type alias: {:?}", cx.tcx.opt_lookup_item_type(did));
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},
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hir::ItemEnum(..) => {
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println!("enum definition: {:?}", cx.tcx.opt_lookup_item_type(did));
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},
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hir::ItemStruct(..) => {
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println!("struct definition: {:?}", cx.tcx.opt_lookup_item_type(did));
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},
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hir::ItemUnion(..) => {
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println!("union definition: {:?}", cx.tcx.opt_lookup_item_type(did));
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},
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hir::ItemTrait(..) => {
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println!("trait decl");
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if cx.tcx.trait_has_default_impl(did) {
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println!("trait has a default impl");
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} else {
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println!("trait has no default impl");
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}
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},
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hir::ItemDefaultImpl(_, ref trait_ref) => {
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let trait_did = cx.tcx.map.local_def_id(trait_ref.ref_id);
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println!("default impl for `{:?}`", cx.tcx.item_path_str(trait_did));
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},
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hir::ItemImpl(_, _, _, Some(ref trait_ref), _, _) => {
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let trait_did = cx.tcx.map.local_def_id(trait_ref.ref_id);
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println!("impl of trait `{:?}`", cx.tcx.item_path_str(trait_did));
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},
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hir::ItemImpl(_, _, _, None, _, _) => {
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println!("impl");
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},
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}
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}
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fn print_pat(cx: &LateContext, pat: &hir::Pat, indent: usize) {
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let ind = " ".repeat(indent);
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println!("{}+", ind);
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match pat.node {
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hir::PatKind::Wild => println!("{}Wild", ind),
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hir::PatKind::Binding(ref mode, ref name, ref inner) => {
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println!("{}Binding", ind);
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println!("{}mode: {:?}", ind, mode);
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println!("{}name: {}", ind, name.node);
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if let Some(ref inner) = *inner {
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println!("{}inner:", ind);
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print_pat(cx, inner, indent + 1);
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}
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},
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hir::PatKind::Struct(ref path, ref fields, ignore) => {
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println!("{}Struct", ind);
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println!("{}name: {}", ind, path);
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println!("{}ignore leftover fields: {}", ind, ignore);
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println!("{}fields:", ind);
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for field in fields {
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println!("{} field name: {}", ind, field.node.name);
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if field.node.is_shorthand {
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println!("{} in shorthand notation", ind);
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}
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print_pat(cx, &field.node.pat, indent + 1);
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}
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},
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hir::PatKind::TupleStruct(ref path, ref fields, opt_dots_position) => {
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println!("{}TupleStruct", ind);
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println!("{}path: {}", ind, path);
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if let Some(dot_position) = opt_dots_position {
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println!("{}dot position: {}", ind, dot_position);
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}
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for field in fields {
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print_pat(cx, field, indent + 1);
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}
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},
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hir::PatKind::Path(ref sel, ref path) => {
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println!("{}Path", ind);
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println!("{}self: {:?}", ind, sel);
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println!("{}path: {:?}", ind, path);
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},
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hir::PatKind::Tuple(ref pats, opt_dots_position) => {
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println!("{}Tuple", ind);
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if let Some(dot_position) = opt_dots_position {
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println!("{}dot position: {}", ind, dot_position);
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}
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for field in pats {
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print_pat(cx, field, indent + 1);
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}
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},
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hir::PatKind::Box(ref inner) => {
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println!("{}Box", ind);
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print_pat(cx, inner, indent + 1);
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},
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hir::PatKind::Ref(ref inner, ref muta) => {
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println!("{}Ref", ind);
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println!("{}mutability: {:?}", ind, muta);
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print_pat(cx, inner, indent + 1);
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},
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hir::PatKind::Lit(ref e) => {
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println!("{}Lit", ind);
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print_expr(cx, e, indent + 1);
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},
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hir::PatKind::Range(ref l, ref r) => {
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println!("{}Range", ind);
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print_expr(cx, l, indent + 1);
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print_expr(cx, r, indent + 1);
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},
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hir::PatKind::Slice(ref first_pats, ref range, ref last_pats) => {
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println!("{}Slice [a, b, ..i, y, z]", ind);
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println!("[a, b]:");
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for pat in first_pats {
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print_pat(cx, pat, indent + 1);
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}
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println!("i:");
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if let Some(ref pat) = *range {
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print_pat(cx, pat, indent + 1);
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}
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println!("[y, z]:");
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for pat in last_pats {
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print_pat(cx, pat, indent + 1);
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}
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},
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}
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}
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