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.
11 use rustc_target::spec::abi::Abi;
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 args: Vec<ast::GenericArg>,
35 bindings: Vec<ast::TypeBinding>)
38 fn qpath(&self, self_type: P<ast::Ty>,
39 trait_path: ast::Path,
41 -> (ast::QSelf, ast::Path);
42 fn qpath_all(&self, self_type: P<ast::Ty>,
43 trait_path: ast::Path,
45 args: Vec<ast::GenericArg>,
46 bindings: Vec<ast::TypeBinding>)
47 -> (ast::QSelf, ast::Path);
50 fn ty_mt(&self, ty: P<ast::Ty>, mutbl: ast::Mutability) -> ast::MutTy;
52 fn ty(&self, span: Span, ty: ast::TyKind) -> P<ast::Ty>;
53 fn ty_path(&self, path: ast::Path) -> P<ast::Ty>;
54 fn ty_ident(&self, span: Span, idents: ast::Ident) -> P<ast::Ty>;
56 fn ty_rptr(&self, span: Span,
58 lifetime: Option<ast::Lifetime>,
59 mutbl: ast::Mutability) -> P<ast::Ty>;
60 fn ty_ptr(&self, span: Span,
62 mutbl: ast::Mutability) -> P<ast::Ty>;
64 fn ty_option(&self, ty: P<ast::Ty>) -> P<ast::Ty>;
65 fn ty_infer(&self, sp: Span) -> P<ast::Ty>;
70 attrs: Vec<ast::Attribute>,
71 bounds: ast::GenericBounds,
72 default: Option<P<ast::Ty>>) -> ast::GenericParam;
74 fn trait_ref(&self, path: ast::Path) -> ast::TraitRef;
75 fn poly_trait_ref(&self, span: Span, path: ast::Path) -> ast::PolyTraitRef;
76 fn trait_bound(&self, path: ast::Path) -> ast::GenericBound;
77 fn lifetime(&self, span: Span, ident: ast::Ident) -> ast::Lifetime;
78 fn lifetime_def(&self,
81 attrs: Vec<ast::Attribute>,
82 bounds: ast::GenericBounds)
86 fn stmt_expr(&self, expr: P<ast::Expr>) -> ast::Stmt;
87 fn stmt_semi(&self, expr: P<ast::Expr>) -> ast::Stmt;
88 fn stmt_let(&self, sp: Span, mutbl: bool, ident: ast::Ident, ex: P<ast::Expr>) -> ast::Stmt;
89 fn stmt_let_typed(&self,
96 fn stmt_let_type_only(&self, span: Span, ty: P<ast::Ty>) -> ast::Stmt;
97 fn stmt_item(&self, sp: Span, item: P<ast::Item>) -> ast::Stmt;
100 fn block(&self, span: Span, stmts: Vec<ast::Stmt>) -> P<ast::Block>;
101 fn block_expr(&self, expr: P<ast::Expr>) -> P<ast::Block>;
104 fn expr(&self, span: Span, node: ast::ExprKind) -> P<ast::Expr>;
105 fn expr_path(&self, path: ast::Path) -> P<ast::Expr>;
106 fn expr_qpath(&self, span: Span, qself: ast::QSelf, path: ast::Path) -> P<ast::Expr>;
107 fn expr_ident(&self, span: Span, id: ast::Ident) -> P<ast::Expr>;
109 fn expr_self(&self, span: Span) -> P<ast::Expr>;
110 fn expr_binary(&self, sp: Span, op: ast::BinOpKind,
111 lhs: P<ast::Expr>, rhs: P<ast::Expr>) -> P<ast::Expr>;
112 fn expr_deref(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr>;
113 fn expr_unary(&self, sp: Span, op: ast::UnOp, e: P<ast::Expr>) -> P<ast::Expr>;
115 fn expr_addr_of(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr>;
116 fn expr_mut_addr_of(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr>;
117 fn expr_field_access(&self, span: Span, expr: P<ast::Expr>, ident: ast::Ident) -> P<ast::Expr>;
118 fn expr_tup_field_access(&self, sp: Span, expr: P<ast::Expr>,
119 idx: usize) -> P<ast::Expr>;
120 fn expr_call(&self, span: Span, expr: P<ast::Expr>, args: Vec<P<ast::Expr>>) -> P<ast::Expr>;
121 fn expr_call_ident(&self, span: Span, id: ast::Ident, args: Vec<P<ast::Expr>>) -> P<ast::Expr>;
122 fn expr_call_global(&self, sp: Span, fn_path: Vec<ast::Ident>,
123 args: Vec<P<ast::Expr>> ) -> P<ast::Expr>;
124 fn expr_method_call(&self, span: Span,
125 expr: P<ast::Expr>, ident: ast::Ident,
126 args: Vec<P<ast::Expr>> ) -> P<ast::Expr>;
127 fn expr_block(&self, b: P<ast::Block>) -> P<ast::Expr>;
128 fn expr_cast(&self, sp: Span, expr: P<ast::Expr>, ty: P<ast::Ty>) -> P<ast::Expr>;
130 fn field_imm(&self, span: Span, name: Ident, e: P<ast::Expr>) -> ast::Field;
131 fn expr_struct(&self, span: Span, path: ast::Path, fields: Vec<ast::Field>) -> P<ast::Expr>;
132 fn expr_struct_ident(&self, span: Span, id: ast::Ident,
133 fields: Vec<ast::Field>) -> P<ast::Expr>;
135 fn expr_lit(&self, sp: Span, lit: ast::LitKind) -> P<ast::Expr>;
137 fn expr_usize(&self, span: Span, i: usize) -> P<ast::Expr>;
138 fn expr_isize(&self, sp: Span, i: isize) -> P<ast::Expr>;
139 fn expr_u8(&self, sp: Span, u: u8) -> P<ast::Expr>;
140 fn expr_u16(&self, sp: Span, u: u16) -> P<ast::Expr>;
141 fn expr_u32(&self, sp: Span, u: u32) -> P<ast::Expr>;
142 fn expr_bool(&self, sp: Span, value: bool) -> P<ast::Expr>;
144 fn expr_vec(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr>;
145 fn expr_vec_ng(&self, sp: Span) -> P<ast::Expr>;
146 fn expr_vec_slice(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr>;
147 fn expr_str(&self, sp: Span, s: Symbol) -> P<ast::Expr>;
149 fn expr_some(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr>;
150 fn expr_none(&self, sp: Span) -> P<ast::Expr>;
152 fn expr_break(&self, sp: Span) -> P<ast::Expr>;
154 fn expr_tuple(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr>;
156 fn expr_fail(&self, span: Span, msg: Symbol) -> P<ast::Expr>;
157 fn expr_unreachable(&self, span: Span) -> P<ast::Expr>;
159 fn expr_ok(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Expr>;
160 fn expr_err(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Expr>;
161 fn expr_try(&self, span: Span, head: P<ast::Expr>) -> P<ast::Expr>;
163 fn pat(&self, span: Span, pat: PatKind) -> P<ast::Pat>;
164 fn pat_wild(&self, span: Span) -> P<ast::Pat>;
165 fn pat_lit(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Pat>;
166 fn pat_ident(&self, span: Span, ident: ast::Ident) -> P<ast::Pat>;
168 fn pat_ident_binding_mode(&self,
171 bm: ast::BindingMode) -> P<ast::Pat>;
172 fn pat_path(&self, span: Span, path: ast::Path) -> P<ast::Pat>;
173 fn pat_tuple_struct(&self, span: Span, path: ast::Path,
174 subpats: Vec<P<ast::Pat>>) -> P<ast::Pat>;
175 fn pat_struct(&self, span: Span, path: ast::Path,
176 field_pats: Vec<Spanned<ast::FieldPat>>) -> P<ast::Pat>;
177 fn pat_tuple(&self, span: Span, pats: Vec<P<ast::Pat>>) -> P<ast::Pat>;
179 fn pat_some(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat>;
180 fn pat_none(&self, span: Span) -> P<ast::Pat>;
182 fn pat_ok(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat>;
183 fn pat_err(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat>;
185 fn arm(&self, span: Span, pats: Vec<P<ast::Pat>>, expr: P<ast::Expr>) -> ast::Arm;
186 fn arm_unreachable(&self, span: Span) -> ast::Arm;
188 fn expr_match(&self, span: Span, arg: P<ast::Expr>, arms: Vec<ast::Arm> ) -> P<ast::Expr>;
189 fn expr_if(&self, span: Span,
190 cond: P<ast::Expr>, then: P<ast::Expr>, els: Option<P<ast::Expr>>) -> P<ast::Expr>;
191 fn expr_loop(&self, span: Span, block: P<ast::Block>) -> P<ast::Expr>;
193 fn lambda_fn_decl(&self,
195 fn_decl: P<ast::FnDecl>,
200 fn lambda(&self, span: Span, ids: Vec<ast::Ident>, body: P<ast::Expr>) -> P<ast::Expr>;
201 fn lambda0(&self, span: Span, body: P<ast::Expr>) -> P<ast::Expr>;
202 fn lambda1(&self, span: Span, body: P<ast::Expr>, ident: ast::Ident) -> P<ast::Expr>;
204 fn lambda_stmts(&self, span: Span, ids: Vec<ast::Ident>,
205 blk: Vec<ast::Stmt>) -> P<ast::Expr>;
206 fn lambda_stmts_0(&self, span: Span, stmts: Vec<ast::Stmt>) -> P<ast::Expr>;
207 fn lambda_stmts_1(&self, span: Span, stmts: Vec<ast::Stmt>,
208 ident: ast::Ident) -> P<ast::Expr>;
211 fn item(&self, span: Span,
212 name: Ident, attrs: Vec<ast::Attribute> , node: ast::ItemKind) -> P<ast::Item>;
214 fn arg(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> ast::Arg;
216 fn fn_decl(&self, inputs: Vec<ast::Arg> , output: ast::FunctionRetTy) -> P<ast::FnDecl>;
218 fn item_fn_poly(&self,
221 inputs: Vec<ast::Arg> ,
224 body: P<ast::Block>) -> P<ast::Item>;
228 inputs: Vec<ast::Arg> ,
230 body: P<ast::Block>) -> P<ast::Item>;
232 fn variant(&self, span: Span, name: Ident, tys: Vec<P<ast::Ty>> ) -> ast::Variant;
233 fn item_enum_poly(&self,
236 enum_definition: ast::EnumDef,
237 generics: Generics) -> P<ast::Item>;
238 fn item_enum(&self, span: Span, name: Ident, enum_def: ast::EnumDef) -> P<ast::Item>;
240 fn item_struct_poly(&self,
243 struct_def: ast::VariantData,
244 generics: Generics) -> P<ast::Item>;
245 fn item_struct(&self, span: Span, name: Ident, struct_def: ast::VariantData) -> P<ast::Item>;
247 fn item_mod(&self, span: Span, inner_span: Span,
248 name: Ident, attrs: Vec<ast::Attribute>,
249 items: Vec<P<ast::Item>>) -> P<ast::Item>;
251 fn item_extern_crate(&self, span: Span, name: Ident) -> P<ast::Item>;
253 fn item_static(&self,
257 mutbl: ast::Mutability,
268 fn item_ty_poly(&self,
272 generics: Generics) -> P<ast::Item>;
273 fn item_ty(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> P<ast::Item>;
275 fn attribute(&self, sp: Span, mi: ast::MetaItem) -> ast::Attribute;
277 fn meta_word(&self, sp: Span, w: ast::Name) -> ast::MetaItem;
279 fn meta_list_item_word(&self, sp: Span, w: ast::Name) -> ast::NestedMetaItem;
284 mis: Vec<ast::NestedMetaItem> )
286 fn meta_name_value(&self,
292 fn item_use(&self, sp: Span,
293 vis: ast::Visibility, vp: P<ast::UseTree>) -> P<ast::Item>;
294 fn item_use_simple(&self, sp: Span, vis: ast::Visibility, path: ast::Path) -> P<ast::Item>;
295 fn item_use_simple_(&self, sp: Span, vis: ast::Visibility,
296 ident: Option<ast::Ident>, path: ast::Path) -> P<ast::Item>;
297 fn item_use_list(&self, sp: Span, vis: ast::Visibility,
298 path: Vec<ast::Ident>, imports: &[ast::Ident]) -> P<ast::Item>;
299 fn item_use_glob(&self, sp: Span,
300 vis: ast::Visibility, path: Vec<ast::Ident>) -> P<ast::Item>;
303 impl<'a> AstBuilder for ExtCtxt<'a> {
304 fn path(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path {
305 self.path_all(span, false, strs, vec![], vec![])
307 fn path_ident(&self, span: Span, id: ast::Ident) -> ast::Path {
308 self.path(span, vec![id])
310 fn path_global(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path {
311 self.path_all(span, true, strs, vec![], vec![])
316 mut idents: Vec<ast::Ident> ,
317 args: Vec<ast::GenericArg>,
318 bindings: Vec<ast::TypeBinding> )
320 let last_ident = idents.pop().unwrap();
321 let mut segments: Vec<ast::PathSegment> = vec![];
323 segments.extend(idents.into_iter().map(|ident| {
324 ast::PathSegment::from_ident(ident.with_span_pos(span))
326 let args = if !args.is_empty() || !bindings.is_empty() {
327 ast::AngleBracketedArgs { args, bindings, span }.into()
331 segments.push(ast::PathSegment { ident: last_ident.with_span_pos(span), args });
332 let mut path = ast::Path { span, segments };
334 if let Some(seg) = path.make_root() {
335 path.segments.insert(0, seg);
341 /// Constructs a qualified path.
343 /// Constructs a path like `<self_type as trait_path>::ident`.
345 self_type: P<ast::Ty>,
346 trait_path: ast::Path,
348 -> (ast::QSelf, ast::Path) {
349 self.qpath_all(self_type, trait_path, ident, vec![], vec![])
352 /// Constructs a qualified path.
354 /// Constructs a path like `<self_type as trait_path>::ident<'a, T, A=Bar>`.
356 self_type: P<ast::Ty>,
357 trait_path: ast::Path,
359 args: Vec<ast::GenericArg>,
360 bindings: Vec<ast::TypeBinding>)
361 -> (ast::QSelf, ast::Path) {
362 let mut path = trait_path;
363 let args = if !args.is_empty() || !bindings.is_empty() {
364 ast::AngleBracketedArgs { args, bindings, span: ident.span }.into()
368 path.segments.push(ast::PathSegment { ident, args });
372 path_span: path.span,
373 position: path.segments.len() - 1
377 fn ty_mt(&self, ty: P<ast::Ty>, mutbl: ast::Mutability) -> ast::MutTy {
384 fn ty(&self, span: Span, ty: ast::TyKind) -> P<ast::Ty> {
386 id: ast::DUMMY_NODE_ID,
392 fn ty_path(&self, path: ast::Path) -> P<ast::Ty> {
393 self.ty(path.span, ast::TyKind::Path(None, path))
396 // Might need to take bounds as an argument in the future, if you ever want
397 // to generate a bounded existential trait type.
398 fn ty_ident(&self, span: Span, ident: ast::Ident)
400 self.ty_path(self.path_ident(span, ident))
406 lifetime: Option<ast::Lifetime>,
407 mutbl: ast::Mutability)
410 ast::TyKind::Rptr(lifetime, self.ty_mt(ty, mutbl)))
416 mutbl: ast::Mutability)
419 ast::TyKind::Ptr(self.ty_mt(ty, mutbl)))
422 fn ty_option(&self, ty: P<ast::Ty>) -> P<ast::Ty> {
424 self.path_all(DUMMY_SP,
426 self.std_path(&["option", "Option"]),
427 vec![ast::GenericArg::Type(ty)],
431 fn ty_infer(&self, span: Span) -> P<ast::Ty> {
432 self.ty(span, ast::TyKind::Infer)
438 attrs: Vec<ast::Attribute>,
439 bounds: ast::GenericBounds,
440 default: Option<P<ast::Ty>>) -> ast::GenericParam {
442 ident: ident.with_span_pos(span),
443 id: ast::DUMMY_NODE_ID,
446 kind: ast::GenericParamKind::Type {
452 fn trait_ref(&self, path: ast::Path) -> ast::TraitRef {
455 ref_id: ast::DUMMY_NODE_ID,
459 fn poly_trait_ref(&self, span: Span, path: ast::Path) -> ast::PolyTraitRef {
461 bound_generic_params: Vec::new(),
462 trait_ref: self.trait_ref(path),
467 fn trait_bound(&self, path: ast::Path) -> ast::GenericBound {
468 ast::GenericBound::Trait(self.poly_trait_ref(path.span, path),
469 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: ast::GenericBounds)
481 -> ast::GenericParam {
482 let lifetime = self.lifetime(span, ident);
484 ident: lifetime.ident,
488 kind: ast::GenericParamKind::Lifetime,
492 fn stmt_expr(&self, expr: P<ast::Expr>) -> ast::Stmt {
494 id: ast::DUMMY_NODE_ID,
496 node: ast::StmtKind::Expr(expr),
500 fn stmt_semi(&self, expr: P<ast::Expr>) -> ast::Stmt {
502 id: ast::DUMMY_NODE_ID,
504 node: ast::StmtKind::Semi(expr),
508 fn stmt_let(&self, sp: Span, mutbl: bool, ident: ast::Ident,
509 ex: P<ast::Expr>) -> ast::Stmt {
511 let binding_mode = ast::BindingMode::ByValue(ast::Mutability::Mutable);
512 self.pat_ident_binding_mode(sp, ident, binding_mode)
514 self.pat_ident(sp, ident)
516 let local = P(ast::Local {
520 id: ast::DUMMY_NODE_ID,
522 attrs: ast::ThinVec::new(),
525 id: ast::DUMMY_NODE_ID,
526 node: ast::StmtKind::Local(local),
531 fn stmt_let_typed(&self,
539 let binding_mode = ast::BindingMode::ByValue(ast::Mutability::Mutable);
540 self.pat_ident_binding_mode(sp, ident, binding_mode)
542 self.pat_ident(sp, ident)
544 let local = P(ast::Local {
548 id: ast::DUMMY_NODE_ID,
550 attrs: ast::ThinVec::new(),
553 id: ast::DUMMY_NODE_ID,
554 node: ast::StmtKind::Local(local),
559 // Generate `let _: Type;`, usually used for type assertions.
560 fn stmt_let_type_only(&self, span: Span, ty: P<ast::Ty>) -> ast::Stmt {
561 let local = P(ast::Local {
562 pat: self.pat_wild(span),
565 id: ast::DUMMY_NODE_ID,
567 attrs: ast::ThinVec::new(),
570 id: ast::DUMMY_NODE_ID,
571 node: ast::StmtKind::Local(local),
576 fn stmt_item(&self, sp: Span, item: P<ast::Item>) -> ast::Stmt {
578 id: ast::DUMMY_NODE_ID,
579 node: ast::StmtKind::Item(item),
584 fn block_expr(&self, expr: P<ast::Expr>) -> P<ast::Block> {
585 self.block(expr.span, vec![ast::Stmt {
586 id: ast::DUMMY_NODE_ID,
588 node: ast::StmtKind::Expr(expr),
591 fn block(&self, span: Span, stmts: Vec<ast::Stmt>) -> P<ast::Block> {
594 id: ast::DUMMY_NODE_ID,
595 rules: BlockCheckMode::Default,
601 fn expr(&self, span: Span, node: ast::ExprKind) -> P<ast::Expr> {
603 id: ast::DUMMY_NODE_ID,
606 attrs: ast::ThinVec::new(),
610 fn expr_path(&self, path: ast::Path) -> P<ast::Expr> {
611 self.expr(path.span, ast::ExprKind::Path(None, path))
614 /// Constructs a QPath expression.
615 fn expr_qpath(&self, span: Span, qself: ast::QSelf, path: ast::Path) -> P<ast::Expr> {
616 self.expr(span, ast::ExprKind::Path(Some(qself), path))
619 fn expr_ident(&self, span: Span, id: ast::Ident) -> P<ast::Expr> {
620 self.expr_path(self.path_ident(span, id))
622 fn expr_self(&self, span: Span) -> P<ast::Expr> {
623 self.expr_ident(span, keywords::SelfValue.ident())
626 fn expr_binary(&self, sp: Span, op: ast::BinOpKind,
627 lhs: P<ast::Expr>, rhs: P<ast::Expr>) -> P<ast::Expr> {
628 self.expr(sp, ast::ExprKind::Binary(Spanned { node: op, span: sp }, lhs, rhs))
631 fn expr_deref(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr> {
632 self.expr_unary(sp, UnOp::Deref, e)
634 fn expr_unary(&self, sp: Span, op: ast::UnOp, e: P<ast::Expr>) -> P<ast::Expr> {
635 self.expr(sp, ast::ExprKind::Unary(op, e))
638 fn expr_field_access(&self, sp: Span, expr: P<ast::Expr>, ident: ast::Ident) -> P<ast::Expr> {
639 self.expr(sp, ast::ExprKind::Field(expr, ident.with_span_pos(sp)))
641 fn expr_tup_field_access(&self, sp: Span, expr: P<ast::Expr>, idx: usize) -> P<ast::Expr> {
642 let ident = Ident::from_str(&idx.to_string()).with_span_pos(sp);
643 self.expr(sp, ast::ExprKind::Field(expr, ident))
645 fn expr_addr_of(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr> {
646 self.expr(sp, ast::ExprKind::AddrOf(ast::Mutability::Immutable, e))
648 fn expr_mut_addr_of(&self, sp: Span, e: P<ast::Expr>) -> P<ast::Expr> {
649 self.expr(sp, ast::ExprKind::AddrOf(ast::Mutability::Mutable, e))
652 fn expr_call(&self, span: Span, expr: P<ast::Expr>, args: Vec<P<ast::Expr>>) -> P<ast::Expr> {
653 self.expr(span, ast::ExprKind::Call(expr, args))
655 fn expr_call_ident(&self, span: Span, id: ast::Ident,
656 args: Vec<P<ast::Expr>>) -> P<ast::Expr> {
657 self.expr(span, ast::ExprKind::Call(self.expr_ident(span, id), args))
659 fn expr_call_global(&self, sp: Span, fn_path: Vec<ast::Ident> ,
660 args: Vec<P<ast::Expr>> ) -> P<ast::Expr> {
661 let pathexpr = self.expr_path(self.path_global(sp, fn_path));
662 self.expr_call(sp, pathexpr, args)
664 fn expr_method_call(&self, span: Span,
667 mut args: Vec<P<ast::Expr>> ) -> P<ast::Expr> {
668 args.insert(0, expr);
669 let segment = ast::PathSegment::from_ident(ident.with_span_pos(span));
670 self.expr(span, ast::ExprKind::MethodCall(segment, args))
672 fn expr_block(&self, b: P<ast::Block>) -> P<ast::Expr> {
673 self.expr(b.span, ast::ExprKind::Block(b, None))
675 fn field_imm(&self, span: Span, ident: Ident, e: P<ast::Expr>) -> ast::Field {
677 ident: ident.with_span_pos(span),
681 attrs: ast::ThinVec::new(),
684 fn expr_struct(&self, span: Span, path: ast::Path, fields: Vec<ast::Field>) -> P<ast::Expr> {
685 self.expr(span, ast::ExprKind::Struct(path, fields, None))
687 fn expr_struct_ident(&self, span: Span,
688 id: ast::Ident, fields: Vec<ast::Field>) -> P<ast::Expr> {
689 self.expr_struct(span, self.path_ident(span, id), fields)
692 fn expr_lit(&self, sp: Span, lit: ast::LitKind) -> P<ast::Expr> {
693 self.expr(sp, ast::ExprKind::Lit(P(respan(sp, lit))))
695 fn expr_usize(&self, span: Span, i: usize) -> P<ast::Expr> {
696 self.expr_lit(span, ast::LitKind::Int(i as u128,
697 ast::LitIntType::Unsigned(ast::UintTy::Usize)))
699 fn expr_isize(&self, sp: Span, i: isize) -> P<ast::Expr> {
701 let i = (-i) as u128;
702 let lit_ty = ast::LitIntType::Signed(ast::IntTy::Isize);
703 let lit = self.expr_lit(sp, ast::LitKind::Int(i, lit_ty));
704 self.expr_unary(sp, ast::UnOp::Neg, lit)
706 self.expr_lit(sp, ast::LitKind::Int(i as u128,
707 ast::LitIntType::Signed(ast::IntTy::Isize)))
710 fn expr_u32(&self, sp: Span, u: u32) -> P<ast::Expr> {
711 self.expr_lit(sp, ast::LitKind::Int(u as u128,
712 ast::LitIntType::Unsigned(ast::UintTy::U32)))
714 fn expr_u16(&self, sp: Span, u: u16) -> P<ast::Expr> {
715 self.expr_lit(sp, ast::LitKind::Int(u as u128,
716 ast::LitIntType::Unsigned(ast::UintTy::U16)))
718 fn expr_u8(&self, sp: Span, u: u8) -> P<ast::Expr> {
719 self.expr_lit(sp, ast::LitKind::Int(u as u128, ast::LitIntType::Unsigned(ast::UintTy::U8)))
721 fn expr_bool(&self, sp: Span, value: bool) -> P<ast::Expr> {
722 self.expr_lit(sp, ast::LitKind::Bool(value))
725 fn expr_vec(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr> {
726 self.expr(sp, ast::ExprKind::Array(exprs))
728 fn expr_vec_ng(&self, sp: Span) -> P<ast::Expr> {
729 self.expr_call_global(sp, self.std_path(&["vec", "Vec", "new"]),
732 fn expr_vec_slice(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr> {
733 self.expr_addr_of(sp, self.expr_vec(sp, exprs))
735 fn expr_str(&self, sp: Span, s: Symbol) -> P<ast::Expr> {
736 self.expr_lit(sp, ast::LitKind::Str(s, ast::StrStyle::Cooked))
739 fn expr_cast(&self, sp: Span, expr: P<ast::Expr>, ty: P<ast::Ty>) -> P<ast::Expr> {
740 self.expr(sp, ast::ExprKind::Cast(expr, ty))
744 fn expr_some(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr> {
745 let some = self.std_path(&["option", "Option", "Some"]);
746 self.expr_call_global(sp, some, vec![expr])
749 fn expr_none(&self, sp: Span) -> P<ast::Expr> {
750 let none = self.std_path(&["option", "Option", "None"]);
751 let none = self.path_global(sp, none);
756 fn expr_break(&self, sp: Span) -> P<ast::Expr> {
757 self.expr(sp, ast::ExprKind::Break(None, None))
761 fn expr_tuple(&self, sp: Span, exprs: Vec<P<ast::Expr>>) -> P<ast::Expr> {
762 self.expr(sp, ast::ExprKind::Tup(exprs))
765 fn expr_fail(&self, span: Span, msg: Symbol) -> P<ast::Expr> {
766 let loc = self.codemap().lookup_char_pos(span.lo());
767 let expr_file = self.expr_str(span, Symbol::intern(&loc.file.name.to_string()));
768 let expr_line = self.expr_u32(span, loc.line as u32);
769 let expr_col = self.expr_u32(span, loc.col.to_usize() as u32 + 1);
770 let expr_loc_tuple = self.expr_tuple(span, vec![expr_file, expr_line, expr_col]);
771 let expr_loc_ptr = self.expr_addr_of(span, expr_loc_tuple);
772 self.expr_call_global(
774 self.std_path(&["rt", "begin_panic"]),
776 self.expr_str(span, msg),
780 fn expr_unreachable(&self, span: Span) -> P<ast::Expr> {
781 self.expr_fail(span, Symbol::intern("internal error: entered unreachable code"))
784 fn expr_ok(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr> {
785 let ok = self.std_path(&["result", "Result", "Ok"]);
786 self.expr_call_global(sp, ok, vec![expr])
789 fn expr_err(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr> {
790 let err = self.std_path(&["result", "Result", "Err"]);
791 self.expr_call_global(sp, err, vec![expr])
794 fn expr_try(&self, sp: Span, head: P<ast::Expr>) -> P<ast::Expr> {
795 let ok = self.std_path(&["result", "Result", "Ok"]);
796 let ok_path = self.path_global(sp, ok);
797 let err = self.std_path(&["result", "Result", "Err"]);
798 let err_path = self.path_global(sp, err);
800 let binding_variable = self.ident_of("__try_var");
801 let binding_pat = self.pat_ident(sp, binding_variable);
802 let binding_expr = self.expr_ident(sp, binding_variable);
804 // Ok(__try_var) pattern
805 let ok_pat = self.pat_tuple_struct(sp, ok_path, vec![binding_pat.clone()]);
807 // Err(__try_var) (pattern and expression resp.)
808 let err_pat = self.pat_tuple_struct(sp, err_path.clone(), vec![binding_pat]);
809 let err_inner_expr = self.expr_call(sp, self.expr_path(err_path),
810 vec![binding_expr.clone()]);
811 // return Err(__try_var)
812 let err_expr = self.expr(sp, ast::ExprKind::Ret(Some(err_inner_expr)));
814 // Ok(__try_var) => __try_var
815 let ok_arm = self.arm(sp, vec![ok_pat], binding_expr);
816 // Err(__try_var) => return Err(__try_var)
817 let err_arm = self.arm(sp, vec![err_pat], err_expr);
819 // match head { Ok() => ..., Err() => ... }
820 self.expr_match(sp, head, vec![ok_arm, err_arm])
824 fn pat(&self, span: Span, pat: PatKind) -> P<ast::Pat> {
825 P(ast::Pat { id: ast::DUMMY_NODE_ID, node: pat, span: span })
827 fn pat_wild(&self, span: Span) -> P<ast::Pat> {
828 self.pat(span, PatKind::Wild)
830 fn pat_lit(&self, span: Span, expr: P<ast::Expr>) -> P<ast::Pat> {
831 self.pat(span, PatKind::Lit(expr))
833 fn pat_ident(&self, span: Span, ident: ast::Ident) -> P<ast::Pat> {
834 let binding_mode = ast::BindingMode::ByValue(ast::Mutability::Immutable);
835 self.pat_ident_binding_mode(span, ident, binding_mode)
838 fn pat_ident_binding_mode(&self,
841 bm: ast::BindingMode) -> P<ast::Pat> {
842 let pat = PatKind::Ident(bm, ident.with_span_pos(span), None);
845 fn pat_path(&self, span: Span, path: ast::Path) -> P<ast::Pat> {
846 self.pat(span, PatKind::Path(None, path))
848 fn pat_tuple_struct(&self, span: Span, path: ast::Path,
849 subpats: Vec<P<ast::Pat>>) -> P<ast::Pat> {
850 self.pat(span, PatKind::TupleStruct(path, subpats, None))
852 fn pat_struct(&self, span: Span, path: ast::Path,
853 field_pats: Vec<Spanned<ast::FieldPat>>) -> P<ast::Pat> {
854 self.pat(span, PatKind::Struct(path, field_pats, false))
856 fn pat_tuple(&self, span: Span, pats: Vec<P<ast::Pat>>) -> P<ast::Pat> {
857 self.pat(span, PatKind::Tuple(pats, None))
860 fn pat_some(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat> {
861 let some = self.std_path(&["option", "Option", "Some"]);
862 let path = self.path_global(span, some);
863 self.pat_tuple_struct(span, path, vec![pat])
866 fn pat_none(&self, span: Span) -> P<ast::Pat> {
867 let some = self.std_path(&["option", "Option", "None"]);
868 let path = self.path_global(span, some);
869 self.pat_path(span, path)
872 fn pat_ok(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat> {
873 let some = self.std_path(&["result", "Result", "Ok"]);
874 let path = self.path_global(span, some);
875 self.pat_tuple_struct(span, path, vec![pat])
878 fn pat_err(&self, span: Span, pat: P<ast::Pat>) -> P<ast::Pat> {
879 let some = self.std_path(&["result", "Result", "Err"]);
880 let path = self.path_global(span, some);
881 self.pat_tuple_struct(span, path, vec![pat])
884 fn arm(&self, _span: Span, pats: Vec<P<ast::Pat>>, expr: P<ast::Expr>) -> ast::Arm {
893 fn arm_unreachable(&self, span: Span) -> ast::Arm {
894 self.arm(span, vec![self.pat_wild(span)], self.expr_unreachable(span))
897 fn expr_match(&self, span: Span, arg: P<ast::Expr>, arms: Vec<ast::Arm>) -> P<Expr> {
898 self.expr(span, ast::ExprKind::Match(arg, arms))
901 fn expr_if(&self, span: Span, cond: P<ast::Expr>,
902 then: P<ast::Expr>, els: Option<P<ast::Expr>>) -> P<ast::Expr> {
903 let els = els.map(|x| self.expr_block(self.block_expr(x)));
904 self.expr(span, ast::ExprKind::If(cond, self.block_expr(then), els))
907 fn expr_loop(&self, span: Span, block: P<ast::Block>) -> P<ast::Expr> {
908 self.expr(span, ast::ExprKind::Loop(block, None))
911 fn lambda_fn_decl(&self,
913 fn_decl: P<ast::FnDecl>,
915 fn_decl_span: Span) // span of the `|...|` part
917 self.expr(span, ast::ExprKind::Closure(ast::CaptureBy::Ref,
918 ast::IsAsync::NotAsync,
919 ast::Movability::Movable,
927 ids: Vec<ast::Ident>,
930 let fn_decl = self.fn_decl(
931 ids.iter().map(|id| self.arg(span, *id, self.ty_infer(span))).collect(),
932 ast::FunctionRetTy::Default(span));
934 // FIXME -- We are using `span` as the span of the `|...|`
935 // part of the lambda, but it probably (maybe?) corresponds to
936 // the entire lambda body. Probably we should extend the API
937 // here, but that's not entirely clear.
938 self.expr(span, ast::ExprKind::Closure(ast::CaptureBy::Ref,
939 ast::IsAsync::NotAsync,
940 ast::Movability::Movable,
946 fn lambda0(&self, span: Span, body: P<ast::Expr>) -> P<ast::Expr> {
947 self.lambda(span, Vec::new(), body)
950 fn lambda1(&self, span: Span, body: P<ast::Expr>, ident: ast::Ident) -> P<ast::Expr> {
951 self.lambda(span, vec![ident], body)
954 fn lambda_stmts(&self,
956 ids: Vec<ast::Ident>,
957 stmts: Vec<ast::Stmt>)
959 self.lambda(span, ids, self.expr_block(self.block(span, stmts)))
961 fn lambda_stmts_0(&self, span: Span, stmts: Vec<ast::Stmt>) -> P<ast::Expr> {
962 self.lambda0(span, self.expr_block(self.block(span, stmts)))
964 fn lambda_stmts_1(&self, span: Span, stmts: Vec<ast::Stmt>,
965 ident: ast::Ident) -> P<ast::Expr> {
966 self.lambda1(span, self.expr_block(self.block(span, stmts)), ident)
969 fn arg(&self, span: Span, ident: ast::Ident, ty: P<ast::Ty>) -> ast::Arg {
970 let arg_pat = self.pat_ident(span, ident);
974 id: ast::DUMMY_NODE_ID
979 fn fn_decl(&self, inputs: Vec<ast::Arg>, output: ast::FunctionRetTy) -> P<ast::FnDecl> {
987 fn item(&self, span: Span, name: Ident,
988 attrs: Vec<ast::Attribute>, node: ast::ItemKind) -> P<ast::Item> {
989 // FIXME: Would be nice if our generated code didn't violate
990 // Rust coding conventions
994 id: ast::DUMMY_NODE_ID,
996 vis: respan(span.shrink_to_lo(), ast::VisibilityKind::Inherited),
1002 fn item_fn_poly(&self,
1005 inputs: Vec<ast::Arg> ,
1008 body: P<ast::Block>) -> P<ast::Item> {
1012 ast::ItemKind::Fn(self.fn_decl(inputs, ast::FunctionRetTy::Ty(output)),
1014 unsafety: ast::Unsafety::Normal,
1015 asyncness: ast::IsAsync::NotAsync,
1016 constness: dummy_spanned(ast::Constness::NotConst),
1026 inputs: Vec<ast::Arg> ,
1035 Generics::default(),
1039 fn variant(&self, span: Span, ident: Ident, tys: Vec<P<ast::Ty>> ) -> ast::Variant {
1040 let fields: Vec<_> = tys.into_iter().map(|ty| {
1045 vis: respan(span.shrink_to_lo(), ast::VisibilityKind::Inherited),
1047 id: ast::DUMMY_NODE_ID,
1051 let vdata = if fields.is_empty() {
1052 ast::VariantData::Unit(ast::DUMMY_NODE_ID)
1054 ast::VariantData::Tuple(fields, ast::DUMMY_NODE_ID)
1066 fn item_enum_poly(&self, span: Span, name: Ident,
1067 enum_definition: ast::EnumDef,
1068 generics: Generics) -> P<ast::Item> {
1069 self.item(span, name, Vec::new(), ast::ItemKind::Enum(enum_definition, generics))
1072 fn item_enum(&self, span: Span, name: Ident,
1073 enum_definition: ast::EnumDef) -> P<ast::Item> {
1074 self.item_enum_poly(span, name, enum_definition,
1075 Generics::default())
1078 fn item_struct(&self, span: Span, name: Ident,
1079 struct_def: ast::VariantData) -> P<ast::Item> {
1080 self.item_struct_poly(
1088 fn item_struct_poly(&self, span: Span, name: Ident,
1089 struct_def: ast::VariantData, generics: Generics) -> P<ast::Item> {
1090 self.item(span, name, Vec::new(), ast::ItemKind::Struct(struct_def, generics))
1093 fn item_mod(&self, span: Span, inner_span: Span, name: Ident,
1094 attrs: Vec<ast::Attribute>,
1095 items: Vec<P<ast::Item>>) -> P<ast::Item> {
1100 ast::ItemKind::Mod(ast::Mod {
1107 fn item_extern_crate(&self, span: Span, name: Ident) -> P<ast::Item> {
1108 self.item(span, name, Vec::new(), ast::ItemKind::ExternCrate(None))
1111 fn item_static(&self,
1115 mutbl: ast::Mutability,
1118 self.item(span, name, Vec::new(), ast::ItemKind::Static(ty, mutbl, expr))
1121 fn item_const(&self,
1127 self.item(span, name, Vec::new(), ast::ItemKind::Const(ty, expr))
1130 fn item_ty_poly(&self, span: Span, name: Ident, ty: P<ast::Ty>,
1131 generics: Generics) -> P<ast::Item> {
1132 self.item(span, name, Vec::new(), ast::ItemKind::Ty(ty, generics))
1135 fn item_ty(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> P<ast::Item> {
1136 self.item_ty_poly(span, name, ty, Generics::default())
1139 fn attribute(&self, sp: Span, mi: ast::MetaItem) -> ast::Attribute {
1140 attr::mk_spanned_attr_outer(sp, attr::mk_attr_id(), mi)
1143 fn meta_word(&self, sp: Span, w: ast::Name) -> ast::MetaItem {
1144 attr::mk_word_item(Ident::with_empty_ctxt(w).with_span_pos(sp))
1147 fn meta_list_item_word(&self, sp: Span, w: ast::Name) -> ast::NestedMetaItem {
1148 attr::mk_nested_word_item(Ident::with_empty_ctxt(w).with_span_pos(sp))
1151 fn meta_list(&self, sp: Span, name: ast::Name, mis: Vec<ast::NestedMetaItem>)
1153 attr::mk_list_item(sp, Ident::with_empty_ctxt(name).with_span_pos(sp), mis)
1156 fn meta_name_value(&self, sp: Span, name: ast::Name, value: ast::LitKind)
1158 attr::mk_name_value_item(sp, Ident::with_empty_ctxt(name).with_span_pos(sp),
1162 fn item_use(&self, sp: Span,
1163 vis: ast::Visibility, vp: P<ast::UseTree>) -> P<ast::Item> {
1165 id: ast::DUMMY_NODE_ID,
1166 ident: keywords::Invalid.ident(),
1168 node: ast::ItemKind::Use(vp),
1175 fn item_use_simple(&self, sp: Span, vis: ast::Visibility, path: ast::Path) -> P<ast::Item> {
1176 self.item_use_simple_(sp, vis, None, path)
1179 fn item_use_simple_(&self, sp: Span, vis: ast::Visibility,
1180 rename: Option<ast::Ident>, path: ast::Path) -> P<ast::Item> {
1181 self.item_use(sp, vis, P(ast::UseTree {
1184 kind: ast::UseTreeKind::Simple(rename, ast::DUMMY_NODE_ID, ast::DUMMY_NODE_ID),
1188 fn item_use_list(&self, sp: Span, vis: ast::Visibility,
1189 path: Vec<ast::Ident>, imports: &[ast::Ident]) -> P<ast::Item> {
1190 let imports = imports.iter().map(|id| {
1193 prefix: self.path(sp, vec![*id]),
1194 kind: ast::UseTreeKind::Simple(None, ast::DUMMY_NODE_ID, ast::DUMMY_NODE_ID),
1195 }, ast::DUMMY_NODE_ID)
1198 self.item_use(sp, vis, P(ast::UseTree {
1200 prefix: self.path(sp, path),
1201 kind: ast::UseTreeKind::Nested(imports),
1205 fn item_use_glob(&self, sp: Span,
1206 vis: ast::Visibility, path: Vec<ast::Ident>) -> P<ast::Item> {
1207 self.item_use(sp, vis, P(ast::UseTree {
1209 prefix: self.path(sp, path),
1210 kind: ast::UseTreeKind::Glob,