1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
12 use ast::{self, Ident, Generics, Expr, BlockCheckMode, UnOp, PatKind};
14 use syntax_pos::{Pos, Span, DUMMY_SP};
15 use codemap::{dummy_spanned, respan, Spanned};
16 use ext::base::ExtCtxt;
18 use symbol::{Symbol, keywords};
20 // Transitional re-exports so qquote can find the paths it is looking for
26 pub trait AstBuilder {
28 fn path(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path;
29 fn path_ident(&self, span: Span, id: ast::Ident) -> ast::Path;
30 fn path_global(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path;
31 fn path_all(&self, sp: Span,
33 idents: Vec<ast::Ident> ,
34 lifetimes: Vec<ast::Lifetime>,
35 types: Vec<P<ast::Ty>>,
36 bindings: Vec<ast::TypeBinding> )
39 fn qpath(&self, self_type: P<ast::Ty>,
40 trait_path: ast::Path,
42 -> (ast::QSelf, ast::Path);
43 fn qpath_all(&self, self_type: P<ast::Ty>,
44 trait_path: ast::Path,
46 lifetimes: Vec<ast::Lifetime>,
47 types: Vec<P<ast::Ty>>,
48 bindings: Vec<ast::TypeBinding>)
49 -> (ast::QSelf, ast::Path);
52 fn ty_mt(&self, ty: P<ast::Ty>, mutbl: ast::Mutability) -> ast::MutTy;
54 fn ty(&self, span: Span, ty: ast::TyKind) -> P<ast::Ty>;
55 fn ty_path(&self, path: ast::Path) -> P<ast::Ty>;
56 fn ty_ident(&self, span: Span, idents: ast::Ident) -> P<ast::Ty>;
58 fn ty_rptr(&self, span: Span,
60 lifetime: Option<ast::Lifetime>,
61 mutbl: ast::Mutability) -> P<ast::Ty>;
62 fn ty_ptr(&self, span: Span,
64 mutbl: ast::Mutability) -> P<ast::Ty>;
66 fn ty_option(&self, ty: P<ast::Ty>) -> P<ast::Ty>;
67 fn ty_infer(&self, sp: Span) -> P<ast::Ty>;
72 attrs: Vec<ast::Attribute>,
73 bounds: ast::TyParamBounds,
74 default: Option<P<ast::Ty>>) -> ast::TyParam;
76 fn trait_ref(&self, path: ast::Path) -> ast::TraitRef;
77 fn poly_trait_ref(&self, span: Span, path: ast::Path) -> ast::PolyTraitRef;
78 fn typarambound(&self, path: ast::Path) -> ast::TyParamBound;
79 fn lifetime(&self, span: Span, ident: ast::Ident) -> ast::Lifetime;
80 fn lifetime_def(&self,
83 attrs: Vec<ast::Attribute>,
84 bounds: Vec<ast::Lifetime>)
88 fn stmt_expr(&self, expr: P<ast::Expr>) -> ast::Stmt;
89 fn stmt_semi(&self, expr: P<ast::Expr>) -> ast::Stmt;
90 fn stmt_let(&self, sp: Span, mutbl: bool, ident: ast::Ident, ex: P<ast::Expr>) -> ast::Stmt;
91 fn stmt_let_typed(&self,
98 fn stmt_let_type_only(&self, span: Span, ty: P<ast::Ty>) -> ast::Stmt;
99 fn stmt_item(&self, sp: Span, item: P<ast::Item>) -> ast::Stmt;
102 fn block(&self, span: Span, stmts: Vec<ast::Stmt>) -> P<ast::Block>;
103 fn block_expr(&self, expr: P<ast::Expr>) -> P<ast::Block>;
106 fn expr(&self, span: Span, node: ast::ExprKind) -> P<ast::Expr>;
107 fn expr_path(&self, path: ast::Path) -> P<ast::Expr>;
108 fn expr_qpath(&self, span: Span, qself: ast::QSelf, path: ast::Path) -> P<ast::Expr>;
109 fn expr_ident(&self, span: Span, id: ast::Ident) -> P<ast::Expr>;
111 fn expr_self(&self, span: Span) -> P<ast::Expr>;
112 fn expr_binary(&self, sp: Span, op: ast::BinOpKind,
113 lhs: P<ast::Expr>, rhs: P<ast::Expr>) -> P<ast::Expr>;
114 fn expr_deref(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr>;
115 fn expr_unary(&self, sp: Span, op: ast::UnOp, e: P<ast::Expr>) -> P<ast::Expr>;
117 fn expr_addr_of(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr>;
118 fn expr_mut_addr_of(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr>;
119 fn expr_field_access(&self, span: Span, expr: P<ast::Expr>, ident: ast::Ident) -> P<ast::Expr>;
120 fn expr_tup_field_access(&self, sp: Span, expr: P<ast::Expr>,
121 idx: usize) -> P<ast::Expr>;
122 fn expr_call(&self, span: Span, expr: P<ast::Expr>, args: Vec<P<ast::Expr>>) -> P<ast::Expr>;
123 fn expr_call_ident(&self, span: Span, id: ast::Ident, args: Vec<P<ast::Expr>>) -> P<ast::Expr>;
124 fn expr_call_global(&self, sp: Span, fn_path: Vec<ast::Ident>,
125 args: Vec<P<ast::Expr>> ) -> P<ast::Expr>;
126 fn expr_method_call(&self, span: Span,
127 expr: P<ast::Expr>, ident: ast::Ident,
128 args: Vec<P<ast::Expr>> ) -> P<ast::Expr>;
129 fn expr_block(&self, b: P<ast::Block>) -> P<ast::Expr>;
130 fn expr_cast(&self, sp: Span, expr: P<ast::Expr>, ty: P<ast::Ty>) -> P<ast::Expr>;
132 fn field_imm(&self, span: Span, name: Ident, e: P<ast::Expr>) -> ast::Field;
133 fn expr_struct(&self, span: Span, path: ast::Path, fields: Vec<ast::Field>) -> P<ast::Expr>;
134 fn expr_struct_ident(&self, span: Span, id: ast::Ident,
135 fields: Vec<ast::Field>) -> P<ast::Expr>;
137 fn expr_lit(&self, sp: Span, lit: ast::LitKind) -> P<ast::Expr>;
139 fn expr_usize(&self, span: Span, i: usize) -> P<ast::Expr>;
140 fn expr_isize(&self, sp: Span, i: isize) -> P<ast::Expr>;
141 fn expr_u8(&self, sp: Span, u: u8) -> P<ast::Expr>;
142 fn expr_u32(&self, sp: Span, u: u32) -> P<ast::Expr>;
143 fn expr_bool(&self, sp: Span, value: bool) -> P<ast::Expr>;
145 fn expr_vec(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr>;
146 fn expr_vec_ng(&self, sp: Span) -> P<ast::Expr>;
147 fn expr_vec_slice(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr>;
148 fn expr_str(&self, sp: Span, s: Symbol) -> P<ast::Expr>;
150 fn expr_some(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr>;
151 fn expr_none(&self, sp: Span) -> P<ast::Expr>;
153 fn expr_break(&self, sp: Span) -> P<ast::Expr>;
155 fn expr_tuple(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr>;
157 fn expr_fail(&self, span: Span, msg: Symbol) -> P<ast::Expr>;
158 fn expr_unreachable(&self, span: Span) -> P<ast::Expr>;
160 fn expr_ok(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Expr>;
161 fn expr_err(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Expr>;
162 fn expr_try(&self, span: Span, head: P<ast::Expr>) -> P<ast::Expr>;
164 fn pat(&self, span: Span, pat: PatKind) -> P<ast::Pat>;
165 fn pat_wild(&self, span: Span) -> P<ast::Pat>;
166 fn pat_lit(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Pat>;
167 fn pat_ident(&self, span: Span, ident: ast::Ident) -> P<ast::Pat>;
169 fn pat_ident_binding_mode(&self,
172 bm: ast::BindingMode) -> P<ast::Pat>;
173 fn pat_path(&self, span: Span, path: ast::Path) -> P<ast::Pat>;
174 fn pat_tuple_struct(&self, span: Span, path: ast::Path,
175 subpats: Vec<P<ast::Pat>>) -> P<ast::Pat>;
176 fn pat_struct(&self, span: Span, path: ast::Path,
177 field_pats: Vec<Spanned<ast::FieldPat>>) -> P<ast::Pat>;
178 fn pat_tuple(&self, span: Span, pats: Vec<P<ast::Pat>>) -> P<ast::Pat>;
180 fn pat_some(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat>;
181 fn pat_none(&self, span: Span) -> P<ast::Pat>;
183 fn pat_ok(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat>;
184 fn pat_err(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat>;
186 fn arm(&self, span: Span, pats: Vec<P<ast::Pat>>, expr: P<ast::Expr>) -> ast::Arm;
187 fn arm_unreachable(&self, span: Span) -> ast::Arm;
189 fn expr_match(&self, span: Span, arg: P<ast::Expr>, arms: Vec<ast::Arm> ) -> P<ast::Expr>;
190 fn expr_if(&self, span: Span,
191 cond: P<ast::Expr>, then: P<ast::Expr>, els: Option<P<ast::Expr>>) -> P<ast::Expr>;
192 fn expr_loop(&self, span: Span, block: P<ast::Block>) -> P<ast::Expr>;
194 fn lambda_fn_decl(&self,
196 fn_decl: P<ast::FnDecl>,
201 fn lambda(&self, span: Span, ids: Vec<ast::Ident>, body: P<ast::Expr>) -> P<ast::Expr>;
202 fn lambda0(&self, span: Span, body: P<ast::Expr>) -> P<ast::Expr>;
203 fn lambda1(&self, span: Span, body: P<ast::Expr>, ident: ast::Ident) -> P<ast::Expr>;
205 fn lambda_stmts(&self, span: Span, ids: Vec<ast::Ident>,
206 blk: Vec<ast::Stmt>) -> P<ast::Expr>;
207 fn lambda_stmts_0(&self, span: Span, stmts: Vec<ast::Stmt>) -> P<ast::Expr>;
208 fn lambda_stmts_1(&self, span: Span, stmts: Vec<ast::Stmt>,
209 ident: ast::Ident) -> P<ast::Expr>;
212 fn item(&self, span: Span,
213 name: Ident, attrs: Vec<ast::Attribute> , node: ast::ItemKind) -> P<ast::Item>;
215 fn arg(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> ast::Arg;
217 fn fn_decl(&self, inputs: Vec<ast::Arg> , output: ast::FunctionRetTy) -> P<ast::FnDecl>;
219 fn item_fn_poly(&self,
222 inputs: Vec<ast::Arg> ,
225 body: P<ast::Block>) -> P<ast::Item>;
229 inputs: Vec<ast::Arg> ,
231 body: P<ast::Block>) -> P<ast::Item>;
233 fn variant(&self, span: Span, name: Ident, tys: Vec<P<ast::Ty>> ) -> ast::Variant;
234 fn item_enum_poly(&self,
237 enum_definition: ast::EnumDef,
238 generics: Generics) -> P<ast::Item>;
239 fn item_enum(&self, span: Span, name: Ident, enum_def: ast::EnumDef) -> P<ast::Item>;
241 fn item_struct_poly(&self,
244 struct_def: ast::VariantData,
245 generics: Generics) -> P<ast::Item>;
246 fn item_struct(&self, span: Span, name: Ident, struct_def: ast::VariantData) -> P<ast::Item>;
248 fn item_mod(&self, span: Span, inner_span: Span,
249 name: Ident, attrs: Vec<ast::Attribute>,
250 items: Vec<P<ast::Item>>) -> P<ast::Item>;
252 fn item_extern_crate(&self, span: Span, name: Ident) -> P<ast::Item>;
254 fn item_static(&self,
258 mutbl: ast::Mutability,
269 fn item_ty_poly(&self,
273 generics: Generics) -> P<ast::Item>;
274 fn item_ty(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> P<ast::Item>;
276 fn attribute(&self, sp: Span, mi: ast::MetaItem) -> ast::Attribute;
278 fn meta_word(&self, sp: Span, w: ast::Name) -> ast::MetaItem;
280 fn meta_list_item_word(&self, sp: Span, w: ast::Name) -> ast::NestedMetaItem;
285 mis: Vec<ast::NestedMetaItem> )
287 fn meta_name_value(&self,
293 fn item_use(&self, sp: Span,
294 vis: ast::Visibility, vp: P<ast::UseTree>) -> P<ast::Item>;
295 fn item_use_simple(&self, sp: Span, vis: ast::Visibility, path: ast::Path) -> P<ast::Item>;
296 fn item_use_simple_(&self, sp: Span, vis: ast::Visibility,
297 ident: Option<ast::Ident>, path: ast::Path) -> P<ast::Item>;
298 fn item_use_list(&self, sp: Span, vis: ast::Visibility,
299 path: Vec<ast::Ident>, imports: &[ast::Ident]) -> P<ast::Item>;
300 fn item_use_glob(&self, sp: Span,
301 vis: ast::Visibility, path: Vec<ast::Ident>) -> P<ast::Item>;
304 impl<'a> AstBuilder for ExtCtxt<'a> {
305 fn path(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path {
306 self.path_all(span, false, strs, Vec::new(), Vec::new(), Vec::new())
308 fn path_ident(&self, span: Span, id: ast::Ident) -> ast::Path {
309 self.path(span, vec![id])
311 fn path_global(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path {
312 self.path_all(span, true, strs, Vec::new(), Vec::new(), Vec::new())
317 mut idents: Vec<ast::Ident> ,
318 lifetimes: Vec<ast::Lifetime>,
319 types: Vec<P<ast::Ty>>,
320 bindings: Vec<ast::TypeBinding> )
322 let last_ident = idents.pop().unwrap();
323 let mut segments: Vec<ast::PathSegment> = Vec::new();
325 segments.extend(idents.into_iter().map(|ident| {
326 ast::PathSegment::from_ident(ident.with_span_pos(span))
328 let parameters = if !lifetimes.is_empty() || !types.is_empty() || !bindings.is_empty() {
329 ast::AngleBracketedParameterData { lifetimes, types, bindings, span }.into()
333 segments.push(ast::PathSegment { ident: last_ident.with_span_pos(span), parameters });
334 let mut path = ast::Path { span, segments };
336 if let Some(seg) = path.make_root() {
337 path.segments.insert(0, seg);
343 /// Constructs a qualified path.
345 /// Constructs a path like `<self_type as trait_path>::ident`.
347 self_type: P<ast::Ty>,
348 trait_path: ast::Path,
350 -> (ast::QSelf, ast::Path) {
351 self.qpath_all(self_type, trait_path, ident, vec![], vec![], vec![])
354 /// Constructs a qualified path.
356 /// Constructs a path like `<self_type as trait_path>::ident<'a, T, A=Bar>`.
358 self_type: P<ast::Ty>,
359 trait_path: ast::Path,
361 lifetimes: Vec<ast::Lifetime>,
362 types: Vec<P<ast::Ty>>,
363 bindings: Vec<ast::TypeBinding>)
364 -> (ast::QSelf, ast::Path) {
365 let mut path = trait_path;
366 let parameters = if !lifetimes.is_empty() || !types.is_empty() || !bindings.is_empty() {
367 ast::AngleBracketedParameterData { lifetimes, types, bindings, span: ident.span }.into()
371 path.segments.push(ast::PathSegment { ident, parameters });
375 position: path.segments.len() - 1
379 fn ty_mt(&self, ty: P<ast::Ty>, mutbl: ast::Mutability) -> ast::MutTy {
386 fn ty(&self, span: Span, ty: ast::TyKind) -> P<ast::Ty> {
388 id: ast::DUMMY_NODE_ID,
394 fn ty_path(&self, path: ast::Path) -> P<ast::Ty> {
395 self.ty(path.span, ast::TyKind::Path(None, path))
398 // Might need to take bounds as an argument in the future, if you ever want
399 // to generate a bounded existential trait type.
400 fn ty_ident(&self, span: Span, ident: ast::Ident)
402 self.ty_path(self.path_ident(span, ident))
408 lifetime: Option<ast::Lifetime>,
409 mutbl: ast::Mutability)
412 ast::TyKind::Rptr(lifetime, self.ty_mt(ty, mutbl)))
418 mutbl: ast::Mutability)
421 ast::TyKind::Ptr(self.ty_mt(ty, mutbl)))
424 fn ty_option(&self, ty: P<ast::Ty>) -> P<ast::Ty> {
426 self.path_all(DUMMY_SP,
428 self.std_path(&["option", "Option"]),
434 fn ty_infer(&self, span: Span) -> P<ast::Ty> {
435 self.ty(span, ast::TyKind::Infer)
441 attrs: Vec<ast::Attribute>,
442 bounds: ast::TyParamBounds,
443 default: Option<P<ast::Ty>>) -> ast::TyParam {
445 ident: ident.with_span_pos(span),
446 id: ast::DUMMY_NODE_ID,
453 fn trait_ref(&self, path: ast::Path) -> ast::TraitRef {
456 ref_id: ast::DUMMY_NODE_ID,
460 fn poly_trait_ref(&self, span: Span, path: ast::Path) -> ast::PolyTraitRef {
462 bound_generic_params: Vec::new(),
463 trait_ref: self.trait_ref(path),
468 fn typarambound(&self, path: ast::Path) -> ast::TyParamBound {
469 ast::TraitTyParamBound(self.poly_trait_ref(path.span, path), ast::TraitBoundModifier::None)
472 fn lifetime(&self, span: Span, ident: ast::Ident) -> ast::Lifetime {
473 ast::Lifetime { id: ast::DUMMY_NODE_ID, ident: ident.with_span_pos(span) }
476 fn lifetime_def(&self,
479 attrs: Vec<ast::Attribute>,
480 bounds: Vec<ast::Lifetime>)
481 -> ast::LifetimeDef {
484 lifetime: self.lifetime(span, ident),
489 fn stmt_expr(&self, expr: P<ast::Expr>) -> ast::Stmt {
491 id: ast::DUMMY_NODE_ID,
493 node: ast::StmtKind::Expr(expr),
497 fn stmt_semi(&self, expr: P<ast::Expr>) -> ast::Stmt {
499 id: ast::DUMMY_NODE_ID,
501 node: ast::StmtKind::Semi(expr),
505 fn stmt_let(&self, sp: Span, mutbl: bool, ident: ast::Ident,
506 ex: P<ast::Expr>) -> ast::Stmt {
508 let binding_mode = ast::BindingMode::ByValue(ast::Mutability::Mutable);
509 self.pat_ident_binding_mode(sp, ident, binding_mode)
511 self.pat_ident(sp, ident)
513 let local = P(ast::Local {
517 id: ast::DUMMY_NODE_ID,
519 attrs: ast::ThinVec::new(),
522 id: ast::DUMMY_NODE_ID,
523 node: ast::StmtKind::Local(local),
528 fn stmt_let_typed(&self,
536 let binding_mode = ast::BindingMode::ByValue(ast::Mutability::Mutable);
537 self.pat_ident_binding_mode(sp, ident, binding_mode)
539 self.pat_ident(sp, ident)
541 let local = P(ast::Local {
545 id: ast::DUMMY_NODE_ID,
547 attrs: ast::ThinVec::new(),
550 id: ast::DUMMY_NODE_ID,
551 node: ast::StmtKind::Local(local),
556 // Generate `let _: Type;`, usually used for type assertions.
557 fn stmt_let_type_only(&self, span: Span, ty: P<ast::Ty>) -> ast::Stmt {
558 let local = P(ast::Local {
559 pat: self.pat_wild(span),
562 id: ast::DUMMY_NODE_ID,
564 attrs: ast::ThinVec::new(),
567 id: ast::DUMMY_NODE_ID,
568 node: ast::StmtKind::Local(local),
573 fn stmt_item(&self, sp: Span, item: P<ast::Item>) -> ast::Stmt {
575 id: ast::DUMMY_NODE_ID,
576 node: ast::StmtKind::Item(item),
581 fn block_expr(&self, expr: P<ast::Expr>) -> P<ast::Block> {
582 self.block(expr.span, vec![ast::Stmt {
583 id: ast::DUMMY_NODE_ID,
585 node: ast::StmtKind::Expr(expr),
588 fn block(&self, span: Span, stmts: Vec<ast::Stmt>) -> P<ast::Block> {
591 id: ast::DUMMY_NODE_ID,
592 rules: BlockCheckMode::Default,
598 fn expr(&self, span: Span, node: ast::ExprKind) -> P<ast::Expr> {
600 id: ast::DUMMY_NODE_ID,
603 attrs: ast::ThinVec::new(),
607 fn expr_path(&self, path: ast::Path) -> P<ast::Expr> {
608 self.expr(path.span, ast::ExprKind::Path(None, path))
611 /// Constructs a QPath expression.
612 fn expr_qpath(&self, span: Span, qself: ast::QSelf, path: ast::Path) -> P<ast::Expr> {
613 self.expr(span, ast::ExprKind::Path(Some(qself), path))
616 fn expr_ident(&self, span: Span, id: ast::Ident) -> P<ast::Expr> {
617 self.expr_path(self.path_ident(span, id))
619 fn expr_self(&self, span: Span) -> P<ast::Expr> {
620 self.expr_ident(span, keywords::SelfValue.ident())
623 fn expr_binary(&self, sp: Span, op: ast::BinOpKind,
624 lhs: P<ast::Expr>, rhs: P<ast::Expr>) -> P<ast::Expr> {
625 self.expr(sp, ast::ExprKind::Binary(Spanned { node: op, span: sp }, lhs, rhs))
628 fn expr_deref(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr> {
629 self.expr_unary(sp, UnOp::Deref, e)
631 fn expr_unary(&self, sp: Span, op: ast::UnOp, e: P<ast::Expr>) -> P<ast::Expr> {
632 self.expr(sp, ast::ExprKind::Unary(op, e))
635 fn expr_field_access(&self, sp: Span, expr: P<ast::Expr>, ident: ast::Ident) -> P<ast::Expr> {
636 self.expr(sp, ast::ExprKind::Field(expr, ident.with_span_pos(sp)))
638 fn expr_tup_field_access(&self, sp: Span, expr: P<ast::Expr>, idx: usize) -> P<ast::Expr> {
639 let id = Spanned { node: idx, span: sp };
640 self.expr(sp, ast::ExprKind::TupField(expr, id))
642 fn expr_addr_of(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr> {
643 self.expr(sp, ast::ExprKind::AddrOf(ast::Mutability::Immutable, e))
645 fn expr_mut_addr_of(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr> {
646 self.expr(sp, ast::ExprKind::AddrOf(ast::Mutability::Mutable, e))
649 fn expr_call(&self, span: Span, expr: P<ast::Expr>, args: Vec<P<ast::Expr>>) -> P<ast::Expr> {
650 self.expr(span, ast::ExprKind::Call(expr, args))
652 fn expr_call_ident(&self, span: Span, id: ast::Ident,
653 args: Vec<P<ast::Expr>>) -> P<ast::Expr> {
654 self.expr(span, ast::ExprKind::Call(self.expr_ident(span, id), args))
656 fn expr_call_global(&self, sp: Span, fn_path: Vec<ast::Ident> ,
657 args: Vec<P<ast::Expr>> ) -> P<ast::Expr> {
658 let pathexpr = self.expr_path(self.path_global(sp, fn_path));
659 self.expr_call(sp, pathexpr, args)
661 fn expr_method_call(&self, span: Span,
664 mut args: Vec<P<ast::Expr>> ) -> P<ast::Expr> {
665 args.insert(0, expr);
666 let segment = ast::PathSegment::from_ident(ident.with_span_pos(span));
667 self.expr(span, ast::ExprKind::MethodCall(segment, args))
669 fn expr_block(&self, b: P<ast::Block>) -> P<ast::Expr> {
670 self.expr(b.span, ast::ExprKind::Block(b))
672 fn field_imm(&self, span: Span, ident: Ident, e: P<ast::Expr>) -> ast::Field {
674 ident: ident.with_span_pos(span),
678 attrs: ast::ThinVec::new(),
681 fn expr_struct(&self, span: Span, path: ast::Path, fields: Vec<ast::Field>) -> P<ast::Expr> {
682 self.expr(span, ast::ExprKind::Struct(path, fields, None))
684 fn expr_struct_ident(&self, span: Span,
685 id: ast::Ident, fields: Vec<ast::Field>) -> P<ast::Expr> {
686 self.expr_struct(span, self.path_ident(span, id), fields)
689 fn expr_lit(&self, sp: Span, lit: ast::LitKind) -> P<ast::Expr> {
690 self.expr(sp, ast::ExprKind::Lit(P(respan(sp, lit))))
692 fn expr_usize(&self, span: Span, i: usize) -> P<ast::Expr> {
693 self.expr_lit(span, ast::LitKind::Int(i as u128,
694 ast::LitIntType::Unsigned(ast::UintTy::Usize)))
696 fn expr_isize(&self, sp: Span, i: isize) -> P<ast::Expr> {
698 let i = (-i) as u128;
699 let lit_ty = ast::LitIntType::Signed(ast::IntTy::Isize);
700 let lit = self.expr_lit(sp, ast::LitKind::Int(i, lit_ty));
701 self.expr_unary(sp, ast::UnOp::Neg, lit)
703 self.expr_lit(sp, ast::LitKind::Int(i as u128,
704 ast::LitIntType::Signed(ast::IntTy::Isize)))
707 fn expr_u32(&self, sp: Span, u: u32) -> P<ast::Expr> {
708 self.expr_lit(sp, ast::LitKind::Int(u as u128,
709 ast::LitIntType::Unsigned(ast::UintTy::U32)))
711 fn expr_u8(&self, sp: Span, u: u8) -> P<ast::Expr> {
712 self.expr_lit(sp, ast::LitKind::Int(u as u128, ast::LitIntType::Unsigned(ast::UintTy::U8)))
714 fn expr_bool(&self, sp: Span, value: bool) -> P<ast::Expr> {
715 self.expr_lit(sp, ast::LitKind::Bool(value))
718 fn expr_vec(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr> {
719 self.expr(sp, ast::ExprKind::Array(exprs))
721 fn expr_vec_ng(&self, sp: Span) -> P<ast::Expr> {
722 self.expr_call_global(sp, self.std_path(&["vec", "Vec", "new"]),
725 fn expr_vec_slice(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr> {
726 self.expr_addr_of(sp, self.expr_vec(sp, exprs))
728 fn expr_str(&self, sp: Span, s: Symbol) -> P<ast::Expr> {
729 self.expr_lit(sp, ast::LitKind::Str(s, ast::StrStyle::Cooked))
732 fn expr_cast(&self, sp: Span, expr: P<ast::Expr>, ty: P<ast::Ty>) -> P<ast::Expr> {
733 self.expr(sp, ast::ExprKind::Cast(expr, ty))
737 fn expr_some(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr> {
738 let some = self.std_path(&["option", "Option", "Some"]);
739 self.expr_call_global(sp, some, vec![expr])
742 fn expr_none(&self, sp: Span) -> P<ast::Expr> {
743 let none = self.std_path(&["option", "Option", "None"]);
744 let none = self.path_global(sp, none);
749 fn expr_break(&self, sp: Span) -> P<ast::Expr> {
750 self.expr(sp, ast::ExprKind::Break(None, None))
754 fn expr_tuple(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr> {
755 self.expr(sp, ast::ExprKind::Tup(exprs))
758 fn expr_fail(&self, span: Span, msg: Symbol) -> P<ast::Expr> {
759 let loc = self.codemap().lookup_char_pos(span.lo());
760 let expr_file = self.expr_str(span, Symbol::intern(&loc.file.name.to_string()));
761 let expr_line = self.expr_u32(span, loc.line as u32);
762 let expr_col = self.expr_u32(span, loc.col.to_usize() as u32 + 1);
763 let expr_loc_tuple = self.expr_tuple(span, vec![expr_file, expr_line, expr_col]);
764 let expr_loc_ptr = self.expr_addr_of(span, expr_loc_tuple);
765 self.expr_call_global(
767 self.std_path(&["rt", "begin_panic"]),
769 self.expr_str(span, msg),
773 fn expr_unreachable(&self, span: Span) -> P<ast::Expr> {
774 self.expr_fail(span, Symbol::intern("internal error: entered unreachable code"))
777 fn expr_ok(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr> {
778 let ok = self.std_path(&["result", "Result", "Ok"]);
779 self.expr_call_global(sp, ok, vec![expr])
782 fn expr_err(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr> {
783 let err = self.std_path(&["result", "Result", "Err"]);
784 self.expr_call_global(sp, err, vec![expr])
787 fn expr_try(&self, sp: Span, head: P<ast::Expr>) -> P<ast::Expr> {
788 let ok = self.std_path(&["result", "Result", "Ok"]);
789 let ok_path = self.path_global(sp, ok);
790 let err = self.std_path(&["result", "Result", "Err"]);
791 let err_path = self.path_global(sp, err);
793 let binding_variable = self.ident_of("__try_var");
794 let binding_pat = self.pat_ident(sp, binding_variable);
795 let binding_expr = self.expr_ident(sp, binding_variable);
797 // Ok(__try_var) pattern
798 let ok_pat = self.pat_tuple_struct(sp, ok_path, vec![binding_pat.clone()]);
800 // Err(__try_var) (pattern and expression resp.)
801 let err_pat = self.pat_tuple_struct(sp, err_path.clone(), vec![binding_pat]);
802 let err_inner_expr = self.expr_call(sp, self.expr_path(err_path),
803 vec![binding_expr.clone()]);
804 // return Err(__try_var)
805 let err_expr = self.expr(sp, ast::ExprKind::Ret(Some(err_inner_expr)));
807 // Ok(__try_var) => __try_var
808 let ok_arm = self.arm(sp, vec![ok_pat], binding_expr);
809 // Err(__try_var) => return Err(__try_var)
810 let err_arm = self.arm(sp, vec![err_pat], err_expr);
812 // match head { Ok() => ..., Err() => ... }
813 self.expr_match(sp, head, vec![ok_arm, err_arm])
817 fn pat(&self, span: Span, pat: PatKind) -> P<ast::Pat> {
818 P(ast::Pat { id: ast::DUMMY_NODE_ID, node: pat, span: span })
820 fn pat_wild(&self, span: Span) -> P<ast::Pat> {
821 self.pat(span, PatKind::Wild)
823 fn pat_lit(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Pat> {
824 self.pat(span, PatKind::Lit(expr))
826 fn pat_ident(&self, span: Span, ident: ast::Ident) -> P<ast::Pat> {
827 let binding_mode = ast::BindingMode::ByValue(ast::Mutability::Immutable);
828 self.pat_ident_binding_mode(span, ident, binding_mode)
831 fn pat_ident_binding_mode(&self,
834 bm: ast::BindingMode) -> P<ast::Pat> {
835 let pat = PatKind::Ident(bm, ident.with_span_pos(span), None);
838 fn pat_path(&self, span: Span, path: ast::Path) -> P<ast::Pat> {
839 self.pat(span, PatKind::Path(None, path))
841 fn pat_tuple_struct(&self, span: Span, path: ast::Path,
842 subpats: Vec<P<ast::Pat>>) -> P<ast::Pat> {
843 self.pat(span, PatKind::TupleStruct(path, subpats, None))
845 fn pat_struct(&self, span: Span, path: ast::Path,
846 field_pats: Vec<Spanned<ast::FieldPat>>) -> P<ast::Pat> {
847 self.pat(span, PatKind::Struct(path, field_pats, false))
849 fn pat_tuple(&self, span: Span, pats: Vec<P<ast::Pat>>) -> P<ast::Pat> {
850 self.pat(span, PatKind::Tuple(pats, None))
853 fn pat_some(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat> {
854 let some = self.std_path(&["option", "Option", "Some"]);
855 let path = self.path_global(span, some);
856 self.pat_tuple_struct(span, path, vec![pat])
859 fn pat_none(&self, span: Span) -> P<ast::Pat> {
860 let some = self.std_path(&["option", "Option", "None"]);
861 let path = self.path_global(span, some);
862 self.pat_path(span, path)
865 fn pat_ok(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat> {
866 let some = self.std_path(&["result", "Result", "Ok"]);
867 let path = self.path_global(span, some);
868 self.pat_tuple_struct(span, path, vec![pat])
871 fn pat_err(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat> {
872 let some = self.std_path(&["result", "Result", "Err"]);
873 let path = self.path_global(span, some);
874 self.pat_tuple_struct(span, path, vec![pat])
877 fn arm(&self, _span: Span, pats: Vec<P<ast::Pat>>, expr: P<ast::Expr>) -> ast::Arm {
886 fn arm_unreachable(&self, span: Span) -> ast::Arm {
887 self.arm(span, vec![self.pat_wild(span)], self.expr_unreachable(span))
890 fn expr_match(&self, span: Span, arg: P<ast::Expr>, arms: Vec<ast::Arm>) -> P<Expr> {
891 self.expr(span, ast::ExprKind::Match(arg, arms))
894 fn expr_if(&self, span: Span, cond: P<ast::Expr>,
895 then: P<ast::Expr>, els: Option<P<ast::Expr>>) -> P<ast::Expr> {
896 let els = els.map(|x| self.expr_block(self.block_expr(x)));
897 self.expr(span, ast::ExprKind::If(cond, self.block_expr(then), els))
900 fn expr_loop(&self, span: Span, block: P<ast::Block>) -> P<ast::Expr> {
901 self.expr(span, ast::ExprKind::Loop(block, None))
904 fn lambda_fn_decl(&self,
906 fn_decl: P<ast::FnDecl>,
908 fn_decl_span: Span) // span of the `|...|` part
910 self.expr(span, ast::ExprKind::Closure(ast::CaptureBy::Ref,
911 ast::Movability::Movable,
919 ids: Vec<ast::Ident>,
922 let fn_decl = self.fn_decl(
923 ids.iter().map(|id| self.arg(span, *id, self.ty_infer(span))).collect(),
924 ast::FunctionRetTy::Default(span));
926 // FIXME -- We are using `span` as the span of the `|...|`
927 // part of the lambda, but it probably (maybe?) corresponds to
928 // the entire lambda body. Probably we should extend the API
929 // here, but that's not entirely clear.
930 self.expr(span, ast::ExprKind::Closure(ast::CaptureBy::Ref,
931 ast::Movability::Movable,
937 fn lambda0(&self, span: Span, body: P<ast::Expr>) -> P<ast::Expr> {
938 self.lambda(span, Vec::new(), body)
941 fn lambda1(&self, span: Span, body: P<ast::Expr>, ident: ast::Ident) -> P<ast::Expr> {
942 self.lambda(span, vec![ident], body)
945 fn lambda_stmts(&self,
947 ids: Vec<ast::Ident>,
948 stmts: Vec<ast::Stmt>)
950 self.lambda(span, ids, self.expr_block(self.block(span, stmts)))
952 fn lambda_stmts_0(&self, span: Span, stmts: Vec<ast::Stmt>) -> P<ast::Expr> {
953 self.lambda0(span, self.expr_block(self.block(span, stmts)))
955 fn lambda_stmts_1(&self, span: Span, stmts: Vec<ast::Stmt>,
956 ident: ast::Ident) -> P<ast::Expr> {
957 self.lambda1(span, self.expr_block(self.block(span, stmts)), ident)
960 fn arg(&self, span: Span, ident: ast::Ident, ty: P<ast::Ty>) -> ast::Arg {
961 let arg_pat = self.pat_ident(span, ident);
965 id: ast::DUMMY_NODE_ID
970 fn fn_decl(&self, inputs: Vec<ast::Arg>, output: ast::FunctionRetTy) -> P<ast::FnDecl> {
978 fn item(&self, span: Span, name: Ident,
979 attrs: Vec<ast::Attribute>, node: ast::ItemKind) -> P<ast::Item> {
980 // FIXME: Would be nice if our generated code didn't violate
981 // Rust coding conventions
985 id: ast::DUMMY_NODE_ID,
987 vis: respan(span.shrink_to_lo(), ast::VisibilityKind::Inherited),
993 fn item_fn_poly(&self,
996 inputs: Vec<ast::Arg> ,
999 body: P<ast::Block>) -> P<ast::Item> {
1003 ast::ItemKind::Fn(self.fn_decl(inputs, ast::FunctionRetTy::Ty(output)),
1004 ast::Unsafety::Normal,
1005 dummy_spanned(ast::Constness::NotConst),
1014 inputs: Vec<ast::Arg> ,
1023 Generics::default(),
1027 fn variant(&self, span: Span, ident: Ident, tys: Vec<P<ast::Ty>> ) -> ast::Variant {
1028 let fields: Vec<_> = tys.into_iter().map(|ty| {
1033 vis: respan(span.shrink_to_lo(), ast::VisibilityKind::Inherited),
1035 id: ast::DUMMY_NODE_ID,
1039 let vdata = if fields.is_empty() {
1040 ast::VariantData::Unit(ast::DUMMY_NODE_ID)
1042 ast::VariantData::Tuple(fields, ast::DUMMY_NODE_ID)
1054 fn item_enum_poly(&self, span: Span, name: Ident,
1055 enum_definition: ast::EnumDef,
1056 generics: Generics) -> P<ast::Item> {
1057 self.item(span, name, Vec::new(), ast::ItemKind::Enum(enum_definition, generics))
1060 fn item_enum(&self, span: Span, name: Ident,
1061 enum_definition: ast::EnumDef) -> P<ast::Item> {
1062 self.item_enum_poly(span, name, enum_definition,
1063 Generics::default())
1066 fn item_struct(&self, span: Span, name: Ident,
1067 struct_def: ast::VariantData) -> P<ast::Item> {
1068 self.item_struct_poly(
1076 fn item_struct_poly(&self, span: Span, name: Ident,
1077 struct_def: ast::VariantData, generics: Generics) -> P<ast::Item> {
1078 self.item(span, name, Vec::new(), ast::ItemKind::Struct(struct_def, generics))
1081 fn item_mod(&self, span: Span, inner_span: Span, name: Ident,
1082 attrs: Vec<ast::Attribute>,
1083 items: Vec<P<ast::Item>>) -> P<ast::Item> {
1088 ast::ItemKind::Mod(ast::Mod {
1095 fn item_extern_crate(&self, span: Span, name: Ident) -> P<ast::Item> {
1096 self.item(span, name, Vec::new(), ast::ItemKind::ExternCrate(None))
1099 fn item_static(&self,
1103 mutbl: ast::Mutability,
1106 self.item(span, name, Vec::new(), ast::ItemKind::Static(ty, mutbl, expr))
1109 fn item_const(&self,
1115 self.item(span, name, Vec::new(), ast::ItemKind::Const(ty, expr))
1118 fn item_ty_poly(&self, span: Span, name: Ident, ty: P<ast::Ty>,
1119 generics: Generics) -> P<ast::Item> {
1120 self.item(span, name, Vec::new(), ast::ItemKind::Ty(ty, generics))
1123 fn item_ty(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> P<ast::Item> {
1124 self.item_ty_poly(span, name, ty, Generics::default())
1127 fn attribute(&self, sp: Span, mi: ast::MetaItem) -> ast::Attribute {
1128 attr::mk_spanned_attr_outer(sp, attr::mk_attr_id(), mi)
1131 fn meta_word(&self, sp: Span, w: ast::Name) -> ast::MetaItem {
1132 attr::mk_spanned_word_item(sp, w)
1135 fn meta_list_item_word(&self, sp: Span, w: ast::Name) -> ast::NestedMetaItem {
1136 respan(sp, ast::NestedMetaItemKind::MetaItem(attr::mk_spanned_word_item(sp, w)))
1139 fn meta_list(&self, sp: Span, name: ast::Name, mis: Vec<ast::NestedMetaItem>)
1141 attr::mk_spanned_list_item(sp, name, mis)
1144 fn meta_name_value(&self, sp: Span, name: ast::Name, value: ast::LitKind)
1146 attr::mk_spanned_name_value_item(sp, name, respan(sp, value))
1149 fn item_use(&self, sp: Span,
1150 vis: ast::Visibility, vp: P<ast::UseTree>) -> P<ast::Item> {
1152 id: ast::DUMMY_NODE_ID,
1153 ident: keywords::Invalid.ident(),
1155 node: ast::ItemKind::Use(vp),
1162 fn item_use_simple(&self, sp: Span, vis: ast::Visibility, path: ast::Path) -> P<ast::Item> {
1163 self.item_use_simple_(sp, vis, None, path)
1166 fn item_use_simple_(&self, sp: Span, vis: ast::Visibility,
1167 rename: Option<ast::Ident>, path: ast::Path) -> P<ast::Item> {
1168 self.item_use(sp, vis, P(ast::UseTree {
1171 kind: ast::UseTreeKind::Simple(rename),
1175 fn item_use_list(&self, sp: Span, vis: ast::Visibility,
1176 path: Vec<ast::Ident>, imports: &[ast::Ident]) -> P<ast::Item> {
1177 let imports = imports.iter().map(|id| {
1180 prefix: self.path(sp, vec![*id]),
1181 kind: ast::UseTreeKind::Simple(None),
1182 }, ast::DUMMY_NODE_ID)
1185 self.item_use(sp, vis, P(ast::UseTree {
1187 prefix: self.path(sp, path),
1188 kind: ast::UseTreeKind::Nested(imports),
1192 fn item_use_glob(&self, sp: Span,
1193 vis: ast::Visibility, path: Vec<ast::Ident>) -> P<ast::Item> {
1194 self.item_use(sp, vis, P(ast::UseTree {
1196 prefix: self.path(sp, path),
1197 kind: ast::UseTreeKind::Glob,