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::{Ident, Generics, Expr};
16 use codemap::{Span, respan, Spanned, DUMMY_SP, Pos};
17 use ext::base::ExtCtxt;
18 use owned_slice::OwnedSlice;
19 use parse::token::special_idents;
20 use parse::token::InternedString;
24 // Transitional reexports so qquote can find the paths it is looking for
30 pub trait AstBuilder {
32 fn path(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path;
33 fn path_ident(&self, span: Span, id: ast::Ident) -> ast::Path;
34 fn path_global(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path;
35 fn path_all(&self, sp: Span,
37 idents: Vec<ast::Ident> ,
38 lifetimes: Vec<ast::Lifetime>,
39 types: Vec<P<ast::Ty>>,
40 bindings: Vec<P<ast::TypeBinding>> )
43 fn qpath(&self, self_type: P<ast::Ty>,
44 trait_path: ast::Path,
46 -> (ast::QSelf, ast::Path);
47 fn qpath_all(&self, self_type: P<ast::Ty>,
48 trait_path: ast::Path,
50 lifetimes: Vec<ast::Lifetime>,
51 types: Vec<P<ast::Ty>>,
52 bindings: Vec<P<ast::TypeBinding>>)
53 -> (ast::QSelf, ast::Path);
56 fn ty_mt(&self, ty: P<ast::Ty>, mutbl: ast::Mutability) -> ast::MutTy;
58 fn ty(&self, span: Span, ty: ast::Ty_) -> P<ast::Ty>;
59 fn ty_path(&self, ast::Path) -> P<ast::Ty>;
60 fn ty_sum(&self, ast::Path, OwnedSlice<ast::TyParamBound>) -> P<ast::Ty>;
61 fn ty_ident(&self, span: Span, idents: ast::Ident) -> P<ast::Ty>;
63 fn ty_rptr(&self, span: Span,
65 lifetime: Option<ast::Lifetime>,
66 mutbl: ast::Mutability) -> P<ast::Ty>;
67 fn ty_ptr(&self, span: Span,
69 mutbl: ast::Mutability) -> P<ast::Ty>;
71 fn ty_option(&self, ty: P<ast::Ty>) -> P<ast::Ty>;
72 fn ty_infer(&self, sp: Span) -> P<ast::Ty>;
74 fn ty_vars(&self, ty_params: &OwnedSlice<ast::TyParam>) -> Vec<P<ast::Ty>> ;
75 fn ty_vars_global(&self, ty_params: &OwnedSlice<ast::TyParam>) -> Vec<P<ast::Ty>> ;
80 bounds: OwnedSlice<ast::TyParamBound>,
81 default: Option<P<ast::Ty>>) -> ast::TyParam;
83 fn trait_ref(&self, path: ast::Path) -> ast::TraitRef;
84 fn poly_trait_ref(&self, span: Span, path: ast::Path) -> ast::PolyTraitRef;
85 fn typarambound(&self, path: ast::Path) -> ast::TyParamBound;
86 fn lifetime(&self, span: Span, ident: ast::Name) -> ast::Lifetime;
87 fn lifetime_def(&self,
90 bounds: Vec<ast::Lifetime>)
94 fn stmt_expr(&self, expr: P<ast::Expr>) -> P<ast::Stmt>;
95 fn stmt_let(&self, sp: Span, mutbl: bool, ident: ast::Ident, ex: P<ast::Expr>) -> P<ast::Stmt>;
96 fn stmt_let_typed(&self,
103 fn stmt_item(&self, sp: Span, item: P<ast::Item>) -> P<ast::Stmt>;
106 fn block(&self, span: Span, stmts: Vec<P<ast::Stmt>>,
107 expr: Option<P<ast::Expr>>) -> P<ast::Block>;
108 fn block_expr(&self, expr: P<ast::Expr>) -> P<ast::Block>;
109 fn block_all(&self, span: Span,
110 stmts: Vec<P<ast::Stmt>>,
111 expr: Option<P<ast::Expr>>) -> P<ast::Block>;
114 fn expr(&self, span: Span, node: ast::Expr_) -> P<ast::Expr>;
115 fn expr_path(&self, path: ast::Path) -> P<ast::Expr>;
116 fn expr_qpath(&self, span: Span, qself: ast::QSelf, path: ast::Path) -> P<ast::Expr>;
117 fn expr_ident(&self, span: Span, id: ast::Ident) -> P<ast::Expr>;
119 fn expr_self(&self, span: Span) -> P<ast::Expr>;
120 fn expr_binary(&self, sp: Span, op: ast::BinOp_,
121 lhs: P<ast::Expr>, rhs: P<ast::Expr>) -> P<ast::Expr>;
122 fn expr_deref(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr>;
123 fn expr_unary(&self, sp: Span, op: ast::UnOp, e: P<ast::Expr>) -> P<ast::Expr>;
125 fn expr_addr_of(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr>;
126 fn expr_mut_addr_of(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr>;
127 fn expr_field_access(&self, span: Span, expr: P<ast::Expr>, ident: ast::Ident) -> P<ast::Expr>;
128 fn expr_tup_field_access(&self, sp: Span, expr: P<ast::Expr>,
129 idx: usize) -> P<ast::Expr>;
130 fn expr_call(&self, span: Span, expr: P<ast::Expr>, args: Vec<P<ast::Expr>>) -> P<ast::Expr>;
131 fn expr_call_ident(&self, span: Span, id: ast::Ident, args: Vec<P<ast::Expr>>) -> P<ast::Expr>;
132 fn expr_call_global(&self, sp: Span, fn_path: Vec<ast::Ident>,
133 args: Vec<P<ast::Expr>> ) -> P<ast::Expr>;
134 fn expr_method_call(&self, span: Span,
135 expr: P<ast::Expr>, ident: ast::Ident,
136 args: Vec<P<ast::Expr>> ) -> P<ast::Expr>;
137 fn expr_block(&self, b: P<ast::Block>) -> P<ast::Expr>;
138 fn expr_cast(&self, sp: Span, expr: P<ast::Expr>, ty: P<ast::Ty>) -> P<ast::Expr>;
140 fn field_imm(&self, span: Span, name: Ident, e: P<ast::Expr>) -> ast::Field;
141 fn expr_struct(&self, span: Span, path: ast::Path, fields: Vec<ast::Field>) -> P<ast::Expr>;
142 fn expr_struct_ident(&self, span: Span, id: ast::Ident,
143 fields: Vec<ast::Field>) -> P<ast::Expr>;
145 fn expr_lit(&self, sp: Span, lit: ast::Lit_) -> P<ast::Expr>;
147 fn expr_usize(&self, span: Span, i: usize) -> P<ast::Expr>;
148 fn expr_isize(&self, sp: Span, i: isize) -> P<ast::Expr>;
149 fn expr_u8(&self, sp: Span, u: u8) -> P<ast::Expr>;
150 fn expr_u32(&self, sp: Span, u: u32) -> P<ast::Expr>;
151 fn expr_bool(&self, sp: Span, value: bool) -> P<ast::Expr>;
153 fn expr_vec(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr>;
154 fn expr_vec_ng(&self, sp: Span) -> P<ast::Expr>;
155 fn expr_vec_slice(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr>;
156 fn expr_str(&self, sp: Span, s: InternedString) -> P<ast::Expr>;
158 fn expr_some(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr>;
159 fn expr_none(&self, sp: Span) -> P<ast::Expr>;
161 fn expr_break(&self, sp: Span) -> P<ast::Expr>;
163 fn expr_tuple(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr>;
165 fn expr_fail(&self, span: Span, msg: InternedString) -> P<ast::Expr>;
166 fn expr_unreachable(&self, span: Span) -> P<ast::Expr>;
168 fn expr_ok(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Expr>;
169 fn expr_err(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Expr>;
170 fn expr_try(&self, span: Span, head: P<ast::Expr>) -> P<ast::Expr>;
172 fn pat(&self, span: Span, pat: ast::Pat_) -> P<ast::Pat>;
173 fn pat_wild(&self, span: Span) -> P<ast::Pat>;
174 fn pat_lit(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Pat>;
175 fn pat_ident(&self, span: Span, ident: ast::Ident) -> P<ast::Pat>;
177 fn pat_ident_binding_mode(&self,
180 bm: ast::BindingMode) -> P<ast::Pat>;
181 fn pat_enum(&self, span: Span, path: ast::Path, subpats: Vec<P<ast::Pat>> ) -> P<ast::Pat>;
182 fn pat_struct(&self, span: Span,
183 path: ast::Path, field_pats: Vec<Spanned<ast::FieldPat>> ) -> P<ast::Pat>;
184 fn pat_tuple(&self, span: Span, pats: Vec<P<ast::Pat>>) -> P<ast::Pat>;
186 fn pat_some(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat>;
187 fn pat_none(&self, span: Span) -> P<ast::Pat>;
189 fn pat_ok(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat>;
190 fn pat_err(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat>;
192 fn arm(&self, span: Span, pats: Vec<P<ast::Pat>>, expr: P<ast::Expr>) -> ast::Arm;
193 fn arm_unreachable(&self, span: Span) -> ast::Arm;
195 fn expr_match(&self, span: Span, arg: P<ast::Expr>, arms: Vec<ast::Arm> ) -> P<ast::Expr>;
196 fn expr_if(&self, span: Span,
197 cond: P<ast::Expr>, then: P<ast::Expr>, els: Option<P<ast::Expr>>) -> P<ast::Expr>;
198 fn expr_loop(&self, span: Span, block: P<ast::Block>) -> P<ast::Expr>;
200 fn lambda_fn_decl(&self, span: Span,
201 fn_decl: P<ast::FnDecl>, blk: P<ast::Block>) -> P<ast::Expr>;
203 fn lambda(&self, span: Span, ids: Vec<ast::Ident> , blk: P<ast::Block>) -> P<ast::Expr>;
204 fn lambda0(&self, span: Span, blk: P<ast::Block>) -> P<ast::Expr>;
205 fn lambda1(&self, span: Span, blk: P<ast::Block>, ident: ast::Ident) -> P<ast::Expr>;
207 fn lambda_expr(&self, span: Span, ids: Vec<ast::Ident> , blk: P<ast::Expr>) -> P<ast::Expr>;
208 fn lambda_expr_0(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Expr>;
209 fn lambda_expr_1(&self, span: Span, expr: P<ast::Expr>, ident: ast::Ident) -> P<ast::Expr>;
211 fn lambda_stmts(&self, span: Span, ids: Vec<ast::Ident>,
212 blk: Vec<P<ast::Stmt>>) -> P<ast::Expr>;
213 fn lambda_stmts_0(&self, span: Span, stmts: Vec<P<ast::Stmt>>) -> P<ast::Expr>;
214 fn lambda_stmts_1(&self, span: Span, stmts: Vec<P<ast::Stmt>>,
215 ident: ast::Ident) -> P<ast::Expr>;
218 fn item(&self, span: Span,
219 name: Ident, attrs: Vec<ast::Attribute> , node: ast::Item_) -> P<ast::Item>;
221 fn arg(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> ast::Arg;
223 fn fn_decl(&self, inputs: Vec<ast::Arg> , output: P<ast::Ty>) -> P<ast::FnDecl>;
225 fn item_fn_poly(&self,
228 inputs: Vec<ast::Arg> ,
231 body: P<ast::Block>) -> P<ast::Item>;
235 inputs: Vec<ast::Arg> ,
237 body: P<ast::Block>) -> P<ast::Item>;
239 fn variant(&self, span: Span, name: Ident, tys: Vec<P<ast::Ty>> ) -> ast::Variant;
240 fn item_enum_poly(&self,
243 enum_definition: ast::EnumDef,
244 generics: Generics) -> P<ast::Item>;
245 fn item_enum(&self, span: Span, name: Ident, enum_def: ast::EnumDef) -> P<ast::Item>;
247 fn item_struct_poly(&self,
250 struct_def: ast::StructDef,
251 generics: Generics) -> P<ast::Item>;
252 fn item_struct(&self, span: Span, name: Ident, struct_def: ast::StructDef) -> P<ast::Item>;
254 fn item_mod(&self, span: Span, inner_span: Span,
255 name: Ident, attrs: Vec<ast::Attribute>,
256 items: Vec<P<ast::Item>>) -> P<ast::Item>;
258 fn item_static(&self,
262 mutbl: ast::Mutability,
273 fn item_ty_poly(&self,
277 generics: Generics) -> P<ast::Item>;
278 fn item_ty(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> P<ast::Item>;
280 fn attribute(&self, sp: Span, mi: P<ast::MetaItem>) -> ast::Attribute;
282 fn meta_word(&self, sp: Span, w: InternedString) -> P<ast::MetaItem>;
285 name: InternedString,
286 mis: Vec<P<ast::MetaItem>> )
288 fn meta_name_value(&self,
290 name: InternedString,
294 fn item_use(&self, sp: Span,
295 vis: ast::Visibility, vp: P<ast::ViewPath>) -> P<ast::Item>;
296 fn item_use_simple(&self, sp: Span, vis: ast::Visibility, path: ast::Path) -> P<ast::Item>;
297 fn item_use_simple_(&self, sp: Span, vis: ast::Visibility,
298 ident: ast::Ident, path: ast::Path) -> P<ast::Item>;
299 fn item_use_list(&self, sp: Span, vis: ast::Visibility,
300 path: Vec<ast::Ident>, imports: &[ast::Ident]) -> P<ast::Item>;
301 fn item_use_glob(&self, sp: Span,
302 vis: ast::Visibility, path: Vec<ast::Ident>) -> P<ast::Item>;
305 impl<'a> AstBuilder for ExtCtxt<'a> {
306 fn path(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path {
307 self.path_all(span, false, strs, Vec::new(), Vec::new(), Vec::new())
309 fn path_ident(&self, span: Span, id: ast::Ident) -> ast::Path {
310 self.path(span, vec!(id))
312 fn path_global(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path {
313 self.path_all(span, true, strs, Vec::new(), Vec::new(), Vec::new())
318 mut idents: Vec<ast::Ident> ,
319 lifetimes: Vec<ast::Lifetime>,
320 types: Vec<P<ast::Ty>>,
321 bindings: Vec<P<ast::TypeBinding>> )
323 let last_identifier = idents.pop().unwrap();
324 let mut segments: Vec<ast::PathSegment> = idents.into_iter()
328 parameters: ast::PathParameters::none(),
331 segments.push(ast::PathSegment {
332 identifier: last_identifier,
333 parameters: ast::AngleBracketedParameters(ast::AngleBracketedParameterData {
334 lifetimes: lifetimes,
335 types: OwnedSlice::from_vec(types),
336 bindings: OwnedSlice::from_vec(bindings),
346 /// Constructs a qualified path.
348 /// Constructs a path like `<self_type as trait_path>::ident`.
350 self_type: P<ast::Ty>,
351 trait_path: ast::Path,
353 -> (ast::QSelf, ast::Path) {
354 self.qpath_all(self_type, trait_path, ident, vec![], vec![], vec![])
357 /// Constructs a qualified path.
359 /// Constructs a path like `<self_type as trait_path>::ident<'a, T, A=Bar>`.
361 self_type: P<ast::Ty>,
362 trait_path: ast::Path,
364 lifetimes: Vec<ast::Lifetime>,
365 types: Vec<P<ast::Ty>>,
366 bindings: Vec<P<ast::TypeBinding>>)
367 -> (ast::QSelf, ast::Path) {
368 let mut path = trait_path;
369 path.segments.push(ast::PathSegment {
371 parameters: ast::AngleBracketedParameters(ast::AngleBracketedParameterData {
372 lifetimes: lifetimes,
373 types: OwnedSlice::from_vec(types),
374 bindings: OwnedSlice::from_vec(bindings),
380 position: path.segments.len() - 1
384 fn ty_mt(&self, ty: P<ast::Ty>, mutbl: ast::Mutability) -> ast::MutTy {
391 fn ty(&self, span: Span, ty: ast::Ty_) -> P<ast::Ty> {
393 id: ast::DUMMY_NODE_ID,
399 fn ty_path(&self, path: ast::Path) -> P<ast::Ty> {
400 self.ty(path.span, ast::TyPath(None, path))
403 fn ty_sum(&self, path: ast::Path, bounds: OwnedSlice<ast::TyParamBound>) -> P<ast::Ty> {
405 ast::TyObjectSum(self.ty_path(path),
409 // Might need to take bounds as an argument in the future, if you ever want
410 // to generate a bounded existential trait type.
411 fn ty_ident(&self, span: Span, ident: ast::Ident)
413 self.ty_path(self.path_ident(span, ident))
419 lifetime: Option<ast::Lifetime>,
420 mutbl: ast::Mutability)
423 ast::TyRptr(lifetime, self.ty_mt(ty, mutbl)))
429 mutbl: ast::Mutability)
432 ast::TyPtr(self.ty_mt(ty, mutbl)))
435 fn ty_option(&self, ty: P<ast::Ty>) -> P<ast::Ty> {
437 self.path_all(DUMMY_SP,
439 self.std_path(&["option", "Option"]),
445 fn ty_infer(&self, span: Span) -> P<ast::Ty> {
446 self.ty(span, ast::TyInfer)
452 bounds: OwnedSlice<ast::TyParamBound>,
453 default: Option<P<ast::Ty>>) -> ast::TyParam {
456 id: ast::DUMMY_NODE_ID,
463 // these are strange, and probably shouldn't be used outside of
464 // pipes. Specifically, the global version possible generates
466 fn ty_vars(&self, ty_params: &OwnedSlice<ast::TyParam>) -> Vec<P<ast::Ty>> {
467 ty_params.iter().map(|p| self.ty_ident(DUMMY_SP, p.ident)).collect()
470 fn ty_vars_global(&self, ty_params: &OwnedSlice<ast::TyParam>) -> Vec<P<ast::Ty>> {
473 .map(|p| self.ty_path(self.path_global(DUMMY_SP, vec!(p.ident))))
477 fn trait_ref(&self, path: ast::Path) -> ast::TraitRef {
480 ref_id: ast::DUMMY_NODE_ID,
484 fn poly_trait_ref(&self, span: Span, path: ast::Path) -> ast::PolyTraitRef {
486 bound_lifetimes: Vec::new(),
487 trait_ref: self.trait_ref(path),
492 fn typarambound(&self, path: ast::Path) -> ast::TyParamBound {
493 ast::TraitTyParamBound(self.poly_trait_ref(path.span, path), ast::TraitBoundModifier::None)
496 fn lifetime(&self, span: Span, name: ast::Name) -> ast::Lifetime {
497 ast::Lifetime { id: ast::DUMMY_NODE_ID, span: span, name: name }
500 fn lifetime_def(&self,
503 bounds: Vec<ast::Lifetime>)
504 -> ast::LifetimeDef {
506 lifetime: self.lifetime(span, name),
511 fn stmt_expr(&self, expr: P<ast::Expr>) -> P<ast::Stmt> {
512 P(respan(expr.span, ast::StmtSemi(expr, ast::DUMMY_NODE_ID)))
515 fn stmt_let(&self, sp: Span, mutbl: bool, ident: ast::Ident,
516 ex: P<ast::Expr>) -> P<ast::Stmt> {
518 self.pat_ident_binding_mode(sp, ident, ast::BindByValue(ast::MutMutable))
520 self.pat_ident(sp, ident)
522 let local = P(ast::Local {
526 id: ast::DUMMY_NODE_ID,
529 let decl = respan(sp, ast::DeclLocal(local));
530 P(respan(sp, ast::StmtDecl(P(decl), ast::DUMMY_NODE_ID)))
533 fn stmt_let_typed(&self,
541 self.pat_ident_binding_mode(sp, ident, ast::BindByValue(ast::MutMutable))
543 self.pat_ident(sp, ident)
545 let local = P(ast::Local {
549 id: ast::DUMMY_NODE_ID,
552 let decl = respan(sp, ast::DeclLocal(local));
553 P(respan(sp, ast::StmtDecl(P(decl), ast::DUMMY_NODE_ID)))
556 fn block(&self, span: Span, stmts: Vec<P<ast::Stmt>>,
557 expr: Option<P<Expr>>) -> P<ast::Block> {
558 self.block_all(span, stmts, expr)
561 fn stmt_item(&self, sp: Span, item: P<ast::Item>) -> P<ast::Stmt> {
562 let decl = respan(sp, ast::DeclItem(item));
563 P(respan(sp, ast::StmtDecl(P(decl), ast::DUMMY_NODE_ID)))
566 fn block_expr(&self, expr: P<ast::Expr>) -> P<ast::Block> {
567 self.block_all(expr.span, Vec::new(), Some(expr))
571 stmts: Vec<P<ast::Stmt>>,
572 expr: Option<P<ast::Expr>>) -> P<ast::Block> {
576 id: ast::DUMMY_NODE_ID,
577 rules: ast::DefaultBlock,
582 fn expr(&self, span: Span, node: ast::Expr_) -> P<ast::Expr> {
584 id: ast::DUMMY_NODE_ID,
590 fn expr_path(&self, path: ast::Path) -> P<ast::Expr> {
591 self.expr(path.span, ast::ExprPath(None, path))
594 /// Constructs a QPath expression.
595 fn expr_qpath(&self, span: Span, qself: ast::QSelf, path: ast::Path) -> P<ast::Expr> {
596 self.expr(span, ast::ExprPath(Some(qself), path))
599 fn expr_ident(&self, span: Span, id: ast::Ident) -> P<ast::Expr> {
600 self.expr_path(self.path_ident(span, id))
602 fn expr_self(&self, span: Span) -> P<ast::Expr> {
603 self.expr_ident(span, special_idents::self_)
606 fn expr_binary(&self, sp: Span, op: ast::BinOp_,
607 lhs: P<ast::Expr>, rhs: P<ast::Expr>) -> P<ast::Expr> {
608 self.expr(sp, ast::ExprBinary(Spanned { node: op, span: sp }, lhs, rhs))
611 fn expr_deref(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr> {
612 self.expr_unary(sp, ast::UnDeref, e)
614 fn expr_unary(&self, sp: Span, op: ast::UnOp, e: P<ast::Expr>) -> P<ast::Expr> {
615 self.expr(sp, ast::ExprUnary(op, e))
618 fn expr_field_access(&self, sp: Span, expr: P<ast::Expr>, ident: ast::Ident) -> P<ast::Expr> {
619 let field_span = Span {
620 lo: sp.lo - Pos::from_usize(ident.name.as_str().len()),
625 let id = Spanned { node: ident, span: field_span };
626 self.expr(sp, ast::ExprField(expr, id))
628 fn expr_tup_field_access(&self, sp: Span, expr: P<ast::Expr>, idx: usize) -> P<ast::Expr> {
629 let field_span = Span {
630 lo: sp.lo - Pos::from_usize(idx.to_string().len()),
635 let id = Spanned { node: idx, span: field_span };
636 self.expr(sp, ast::ExprTupField(expr, id))
638 fn expr_addr_of(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr> {
639 self.expr(sp, ast::ExprAddrOf(ast::MutImmutable, e))
641 fn expr_mut_addr_of(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr> {
642 self.expr(sp, ast::ExprAddrOf(ast::MutMutable, e))
645 fn expr_call(&self, span: Span, expr: P<ast::Expr>, args: Vec<P<ast::Expr>>) -> P<ast::Expr> {
646 self.expr(span, ast::ExprCall(expr, args))
648 fn expr_call_ident(&self, span: Span, id: ast::Ident,
649 args: Vec<P<ast::Expr>>) -> P<ast::Expr> {
650 self.expr(span, ast::ExprCall(self.expr_ident(span, id), args))
652 fn expr_call_global(&self, sp: Span, fn_path: Vec<ast::Ident> ,
653 args: Vec<P<ast::Expr>> ) -> P<ast::Expr> {
654 let pathexpr = self.expr_path(self.path_global(sp, fn_path));
655 self.expr_call(sp, pathexpr, args)
657 fn expr_method_call(&self, span: Span,
660 mut args: Vec<P<ast::Expr>> ) -> P<ast::Expr> {
661 let id = Spanned { node: ident, span: span };
662 args.insert(0, expr);
663 self.expr(span, ast::ExprMethodCall(id, Vec::new(), args))
665 fn expr_block(&self, b: P<ast::Block>) -> P<ast::Expr> {
666 self.expr(b.span, ast::ExprBlock(b))
668 fn field_imm(&self, span: Span, name: Ident, e: P<ast::Expr>) -> ast::Field {
669 ast::Field { ident: respan(span, name), expr: e, span: span }
671 fn expr_struct(&self, span: Span, path: ast::Path, fields: Vec<ast::Field>) -> P<ast::Expr> {
672 self.expr(span, ast::ExprStruct(path, fields, None))
674 fn expr_struct_ident(&self, span: Span,
675 id: ast::Ident, fields: Vec<ast::Field>) -> P<ast::Expr> {
676 self.expr_struct(span, self.path_ident(span, id), fields)
679 fn expr_lit(&self, sp: Span, lit: ast::Lit_) -> P<ast::Expr> {
680 self.expr(sp, ast::ExprLit(P(respan(sp, lit))))
682 fn expr_usize(&self, span: Span, i: usize) -> P<ast::Expr> {
683 self.expr_lit(span, ast::LitInt(i as u64, ast::UnsignedIntLit(ast::TyUs)))
685 fn expr_isize(&self, sp: Span, i: isize) -> P<ast::Expr> {
686 self.expr_lit(sp, ast::LitInt(i as u64, ast::SignedIntLit(ast::TyIs,
689 fn expr_u32(&self, sp: Span, u: u32) -> P<ast::Expr> {
690 self.expr_lit(sp, ast::LitInt(u as u64, ast::UnsignedIntLit(ast::TyU32)))
692 fn expr_u8(&self, sp: Span, u: u8) -> P<ast::Expr> {
693 self.expr_lit(sp, ast::LitInt(u as u64, ast::UnsignedIntLit(ast::TyU8)))
695 fn expr_bool(&self, sp: Span, value: bool) -> P<ast::Expr> {
696 self.expr_lit(sp, ast::LitBool(value))
699 fn expr_vec(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr> {
700 self.expr(sp, ast::ExprVec(exprs))
702 fn expr_vec_ng(&self, sp: Span) -> P<ast::Expr> {
703 self.expr_call_global(sp, self.std_path(&["vec", "Vec", "new"]),
706 fn expr_vec_slice(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr> {
707 self.expr_addr_of(sp, self.expr_vec(sp, exprs))
709 fn expr_str(&self, sp: Span, s: InternedString) -> P<ast::Expr> {
710 self.expr_lit(sp, ast::LitStr(s, ast::CookedStr))
713 fn expr_cast(&self, sp: Span, expr: P<ast::Expr>, ty: P<ast::Ty>) -> P<ast::Expr> {
714 self.expr(sp, ast::ExprCast(expr, ty))
718 fn expr_some(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr> {
719 let some = self.std_path(&["option", "Option", "Some"]);
720 self.expr_call_global(sp, some, vec!(expr))
723 fn expr_none(&self, sp: Span) -> P<ast::Expr> {
724 let none = self.std_path(&["option", "Option", "None"]);
725 let none = self.path_global(sp, none);
730 fn expr_break(&self, sp: Span) -> P<ast::Expr> {
731 self.expr(sp, ast::ExprBreak(None))
735 fn expr_tuple(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr> {
736 self.expr(sp, ast::ExprTup(exprs))
739 fn expr_fail(&self, span: Span, msg: InternedString) -> P<ast::Expr> {
740 let loc = self.codemap().lookup_char_pos(span.lo);
741 let expr_file = self.expr_str(span,
742 token::intern_and_get_ident(&loc.file.name));
743 let expr_line = self.expr_u32(span, loc.line as u32);
744 let expr_file_line_tuple = self.expr_tuple(span, vec!(expr_file, expr_line));
745 let expr_file_line_ptr = self.expr_addr_of(span, expr_file_line_tuple);
746 self.expr_call_global(
748 self.std_path(&["rt", "begin_unwind"]),
750 self.expr_str(span, msg),
754 fn expr_unreachable(&self, span: Span) -> P<ast::Expr> {
757 "internal error: entered unreachable code"))
760 fn expr_ok(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr> {
761 let ok = self.std_path(&["result", "Result", "Ok"]);
762 self.expr_call_global(sp, ok, vec!(expr))
765 fn expr_err(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr> {
766 let err = self.std_path(&["result", "Result", "Err"]);
767 self.expr_call_global(sp, err, vec!(expr))
770 fn expr_try(&self, sp: Span, head: P<ast::Expr>) -> P<ast::Expr> {
771 let ok = self.std_path(&["result", "Result", "Ok"]);
772 let ok_path = self.path_global(sp, ok);
773 let err = self.std_path(&["result", "Result", "Err"]);
774 let err_path = self.path_global(sp, err);
776 let binding_variable = self.ident_of("__try_var");
777 let binding_pat = self.pat_ident(sp, binding_variable);
778 let binding_expr = self.expr_ident(sp, binding_variable);
780 // Ok(__try_var) pattern
781 let ok_pat = self.pat_enum(sp, ok_path, vec!(binding_pat.clone()));
783 // Err(__try_var) (pattern and expression resp.)
784 let err_pat = self.pat_enum(sp, err_path.clone(), vec!(binding_pat));
785 let err_inner_expr = self.expr_call(sp, self.expr_path(err_path),
786 vec!(binding_expr.clone()));
787 // return Err(__try_var)
788 let err_expr = self.expr(sp, ast::ExprRet(Some(err_inner_expr)));
790 // Ok(__try_var) => __try_var
791 let ok_arm = self.arm(sp, vec!(ok_pat), binding_expr);
792 // Err(__try_var) => return Err(__try_var)
793 let err_arm = self.arm(sp, vec!(err_pat), err_expr);
795 // match head { Ok() => ..., Err() => ... }
796 self.expr_match(sp, head, vec!(ok_arm, err_arm))
800 fn pat(&self, span: Span, pat: ast::Pat_) -> P<ast::Pat> {
801 P(ast::Pat { id: ast::DUMMY_NODE_ID, node: pat, span: span })
803 fn pat_wild(&self, span: Span) -> P<ast::Pat> {
804 self.pat(span, ast::PatWild(ast::PatWildSingle))
806 fn pat_lit(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Pat> {
807 self.pat(span, ast::PatLit(expr))
809 fn pat_ident(&self, span: Span, ident: ast::Ident) -> P<ast::Pat> {
810 self.pat_ident_binding_mode(span, ident, ast::BindByValue(ast::MutImmutable))
813 fn pat_ident_binding_mode(&self,
816 bm: ast::BindingMode) -> P<ast::Pat> {
817 let pat = ast::PatIdent(bm, Spanned{span: span, node: ident}, None);
820 fn pat_enum(&self, span: Span, path: ast::Path, subpats: Vec<P<ast::Pat>>) -> P<ast::Pat> {
821 let pat = ast::PatEnum(path, Some(subpats));
824 fn pat_struct(&self, span: Span,
825 path: ast::Path, field_pats: Vec<Spanned<ast::FieldPat>>) -> P<ast::Pat> {
826 let pat = ast::PatStruct(path, field_pats, false);
829 fn pat_tuple(&self, span: Span, pats: Vec<P<ast::Pat>>) -> P<ast::Pat> {
830 self.pat(span, ast::PatTup(pats))
833 fn pat_some(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat> {
834 let some = self.std_path(&["option", "Option", "Some"]);
835 let path = self.path_global(span, some);
836 self.pat_enum(span, path, vec!(pat))
839 fn pat_none(&self, span: Span) -> P<ast::Pat> {
840 let some = self.std_path(&["option", "Option", "None"]);
841 let path = self.path_global(span, some);
842 self.pat_enum(span, path, vec!())
845 fn pat_ok(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat> {
846 let some = self.std_path(&["result", "Result", "Ok"]);
847 let path = self.path_global(span, some);
848 self.pat_enum(span, path, vec!(pat))
851 fn pat_err(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat> {
852 let some = self.std_path(&["result", "Result", "Err"]);
853 let path = self.path_global(span, some);
854 self.pat_enum(span, path, vec!(pat))
857 fn arm(&self, _span: Span, pats: Vec<P<ast::Pat>>, expr: P<ast::Expr>) -> ast::Arm {
866 fn arm_unreachable(&self, span: Span) -> ast::Arm {
867 self.arm(span, vec!(self.pat_wild(span)), self.expr_unreachable(span))
870 fn expr_match(&self, span: Span, arg: P<ast::Expr>, arms: Vec<ast::Arm>) -> P<Expr> {
871 self.expr(span, ast::ExprMatch(arg, arms, ast::MatchSource::Normal))
874 fn expr_if(&self, span: Span, cond: P<ast::Expr>,
875 then: P<ast::Expr>, els: Option<P<ast::Expr>>) -> P<ast::Expr> {
876 let els = els.map(|x| self.expr_block(self.block_expr(x)));
877 self.expr(span, ast::ExprIf(cond, self.block_expr(then), els))
880 fn expr_loop(&self, span: Span, block: P<ast::Block>) -> P<ast::Expr> {
881 self.expr(span, ast::ExprLoop(block, None))
884 fn lambda_fn_decl(&self, span: Span,
885 fn_decl: P<ast::FnDecl>, blk: P<ast::Block>) -> P<ast::Expr> {
886 self.expr(span, ast::ExprClosure(ast::CaptureByRef, fn_decl, blk))
888 fn lambda(&self, span: Span, ids: Vec<ast::Ident>, blk: P<ast::Block>) -> P<ast::Expr> {
889 let fn_decl = self.fn_decl(
890 ids.iter().map(|id| self.arg(span, *id, self.ty_infer(span))).collect(),
891 self.ty_infer(span));
893 self.expr(span, ast::ExprClosure(ast::CaptureByRef, fn_decl, blk))
895 fn lambda0(&self, span: Span, blk: P<ast::Block>) -> P<ast::Expr> {
896 self.lambda(span, Vec::new(), blk)
899 fn lambda1(&self, span: Span, blk: P<ast::Block>, ident: ast::Ident) -> P<ast::Expr> {
900 self.lambda(span, vec!(ident), blk)
903 fn lambda_expr(&self, span: Span, ids: Vec<ast::Ident>,
904 expr: P<ast::Expr>) -> P<ast::Expr> {
905 self.lambda(span, ids, self.block_expr(expr))
907 fn lambda_expr_0(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Expr> {
908 self.lambda0(span, self.block_expr(expr))
910 fn lambda_expr_1(&self, span: Span, expr: P<ast::Expr>, ident: ast::Ident) -> P<ast::Expr> {
911 self.lambda1(span, self.block_expr(expr), ident)
914 fn lambda_stmts(&self,
916 ids: Vec<ast::Ident>,
917 stmts: Vec<P<ast::Stmt>>)
919 self.lambda(span, ids, self.block(span, stmts, None))
921 fn lambda_stmts_0(&self, span: Span, stmts: Vec<P<ast::Stmt>>) -> P<ast::Expr> {
922 self.lambda0(span, self.block(span, stmts, None))
924 fn lambda_stmts_1(&self, span: Span, stmts: Vec<P<ast::Stmt>>,
925 ident: ast::Ident) -> P<ast::Expr> {
926 self.lambda1(span, self.block(span, stmts, None), ident)
929 fn arg(&self, span: Span, ident: ast::Ident, ty: P<ast::Ty>) -> ast::Arg {
930 let arg_pat = self.pat_ident(span, ident);
934 id: ast::DUMMY_NODE_ID
939 fn fn_decl(&self, inputs: Vec<ast::Arg>, output: P<ast::Ty>) -> P<ast::FnDecl> {
942 output: ast::Return(output),
947 fn item(&self, span: Span, name: Ident,
948 attrs: Vec<ast::Attribute>, node: ast::Item_) -> P<ast::Item> {
949 // FIXME: Would be nice if our generated code didn't violate
950 // Rust coding conventions
954 id: ast::DUMMY_NODE_ID,
961 fn item_fn_poly(&self,
964 inputs: Vec<ast::Arg> ,
967 body: P<ast::Block>) -> P<ast::Item> {
971 ast::ItemFn(self.fn_decl(inputs, output),
972 ast::Unsafety::Normal,
973 ast::Constness::NotConst,
982 inputs: Vec<ast::Arg> ,
991 ast_util::empty_generics(),
995 fn variant(&self, span: Span, name: Ident, tys: Vec<P<ast::Ty>> ) -> ast::Variant {
996 let args = tys.into_iter().map(|ty| {
997 ast::VariantArg { ty: ty, id: ast::DUMMY_NODE_ID }
1004 kind: ast::TupleVariantKind(args),
1005 id: ast::DUMMY_NODE_ID,
1010 fn item_enum_poly(&self, span: Span, name: Ident,
1011 enum_definition: ast::EnumDef,
1012 generics: Generics) -> P<ast::Item> {
1013 self.item(span, name, Vec::new(), ast::ItemEnum(enum_definition, generics))
1016 fn item_enum(&self, span: Span, name: Ident,
1017 enum_definition: ast::EnumDef) -> P<ast::Item> {
1018 self.item_enum_poly(span, name, enum_definition,
1019 ast_util::empty_generics())
1022 fn item_struct(&self, span: Span, name: Ident,
1023 struct_def: ast::StructDef) -> P<ast::Item> {
1024 self.item_struct_poly(
1028 ast_util::empty_generics()
1032 fn item_struct_poly(&self, span: Span, name: Ident,
1033 struct_def: ast::StructDef, generics: Generics) -> P<ast::Item> {
1034 self.item(span, name, Vec::new(), ast::ItemStruct(P(struct_def), generics))
1037 fn item_mod(&self, span: Span, inner_span: Span, name: Ident,
1038 attrs: Vec<ast::Attribute>,
1039 items: Vec<P<ast::Item>>) -> P<ast::Item> {
1044 ast::ItemMod(ast::Mod {
1051 fn item_static(&self,
1055 mutbl: ast::Mutability,
1058 self.item(span, name, Vec::new(), ast::ItemStatic(ty, mutbl, expr))
1061 fn item_const(&self,
1067 self.item(span, name, Vec::new(), ast::ItemConst(ty, expr))
1070 fn item_ty_poly(&self, span: Span, name: Ident, ty: P<ast::Ty>,
1071 generics: Generics) -> P<ast::Item> {
1072 self.item(span, name, Vec::new(), ast::ItemTy(ty, generics))
1075 fn item_ty(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> P<ast::Item> {
1076 self.item_ty_poly(span, name, ty, ast_util::empty_generics())
1079 fn attribute(&self, sp: Span, mi: P<ast::MetaItem>) -> ast::Attribute {
1080 respan(sp, ast::Attribute_ {
1081 id: attr::mk_attr_id(),
1082 style: ast::AttrOuter,
1084 is_sugared_doc: false,
1088 fn meta_word(&self, sp: Span, w: InternedString) -> P<ast::MetaItem> {
1089 P(respan(sp, ast::MetaWord(w)))
1093 name: InternedString,
1094 mis: Vec<P<ast::MetaItem>> )
1095 -> P<ast::MetaItem> {
1096 P(respan(sp, ast::MetaList(name, mis)))
1098 fn meta_name_value(&self,
1100 name: InternedString,
1102 -> P<ast::MetaItem> {
1103 P(respan(sp, ast::MetaNameValue(name, respan(sp, value))))
1106 fn item_use(&self, sp: Span,
1107 vis: ast::Visibility, vp: P<ast::ViewPath>) -> P<ast::Item> {
1109 id: ast::DUMMY_NODE_ID,
1110 ident: special_idents::invalid,
1112 node: ast::ItemUse(vp),
1118 fn item_use_simple(&self, sp: Span, vis: ast::Visibility, path: ast::Path) -> P<ast::Item> {
1119 let last = path.segments.last().unwrap().identifier;
1120 self.item_use_simple_(sp, vis, last, path)
1123 fn item_use_simple_(&self, sp: Span, vis: ast::Visibility,
1124 ident: ast::Ident, path: ast::Path) -> P<ast::Item> {
1125 self.item_use(sp, vis,
1127 ast::ViewPathSimple(ident,
1131 fn item_use_list(&self, sp: Span, vis: ast::Visibility,
1132 path: Vec<ast::Ident>, imports: &[ast::Ident]) -> P<ast::Item> {
1133 let imports = imports.iter().map(|id| {
1134 respan(sp, ast::PathListIdent { name: *id, rename: None, id: ast::DUMMY_NODE_ID })
1137 self.item_use(sp, vis,
1139 ast::ViewPathList(self.path(sp, path),
1143 fn item_use_glob(&self, sp: Span,
1144 vis: ast::Visibility, path: Vec<ast::Ident>) -> P<ast::Item> {
1145 self.item_use(sp, vis,
1147 ast::ViewPathGlob(self.path(sp, path)))))