1027 lines
37 KiB
Rust
1027 lines
37 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use abi;
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use ast::{P, Ident};
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use ast;
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use ast_util;
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use codemap::{Span, respan, Spanned, DUMMY_SP};
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use ext::base::ExtCtxt;
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use ext::quote::rt::*;
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use fold::Folder;
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use owned_slice::OwnedSlice;
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use parse::token::special_idents;
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use parse::token;
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pub struct Field {
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ident: ast::Ident,
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ex: @ast::Expr
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}
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// Transitional reexports so qquote can find the paths it is looking for
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mod syntax {
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pub use ext;
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pub use parse;
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}
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pub trait AstBuilder {
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// paths
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fn path(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path;
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fn path_ident(&self, span: Span, id: ast::Ident) -> ast::Path;
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fn path_global(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path;
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fn path_all(&self, sp: Span,
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global: bool,
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idents: Vec<ast::Ident> ,
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lifetimes: Vec<ast::Lifetime>,
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types: Vec<P<ast::Ty>> )
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-> ast::Path;
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// types
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fn ty_mt(&self, ty: P<ast::Ty>, mutbl: ast::Mutability) -> ast::MutTy;
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fn ty(&self, span: Span, ty: ast::Ty_) -> P<ast::Ty>;
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fn ty_path(&self, ast::Path, Option<OwnedSlice<ast::TyParamBound>>) -> P<ast::Ty>;
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fn ty_ident(&self, span: Span, idents: ast::Ident) -> P<ast::Ty>;
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fn ty_rptr(&self, span: Span,
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ty: P<ast::Ty>,
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lifetime: Option<ast::Lifetime>,
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mutbl: ast::Mutability) -> P<ast::Ty>;
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fn ty_uniq(&self, span: Span, ty: P<ast::Ty>) -> P<ast::Ty>;
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fn ty_option(&self, ty: P<ast::Ty>) -> P<ast::Ty>;
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fn ty_infer(&self, sp: Span) -> P<ast::Ty>;
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fn ty_nil(&self) -> P<ast::Ty>;
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fn ty_vars(&self, ty_params: &OwnedSlice<ast::TyParam>) -> Vec<P<ast::Ty>> ;
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fn ty_vars_global(&self, ty_params: &OwnedSlice<ast::TyParam>) -> Vec<P<ast::Ty>> ;
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fn ty_field_imm(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> ast::TypeField;
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fn strip_bounds(&self, bounds: &Generics) -> Generics;
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fn typaram(&self,
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span: Span,
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id: ast::Ident,
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sized: ast::Sized,
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bounds: OwnedSlice<ast::TyParamBound>,
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default: Option<P<ast::Ty>>) -> ast::TyParam;
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fn trait_ref(&self, path: ast::Path) -> ast::TraitRef;
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fn typarambound(&self, path: ast::Path) -> ast::TyParamBound;
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fn lifetime(&self, span: Span, ident: ast::Name) -> ast::Lifetime;
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// statements
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fn stmt_expr(&self, expr: @ast::Expr) -> @ast::Stmt;
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fn stmt_let(&self, sp: Span, mutbl: bool, ident: ast::Ident, ex: @ast::Expr) -> @ast::Stmt;
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fn stmt_let_typed(&self,
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sp: Span,
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mutbl: bool,
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ident: ast::Ident,
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typ: P<ast::Ty>,
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ex: @ast::Expr)
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-> @ast::Stmt;
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// blocks
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fn block(&self, span: Span, stmts: Vec<@ast::Stmt> , expr: Option<@ast::Expr>) -> P<ast::Block>;
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fn block_expr(&self, expr: @ast::Expr) -> P<ast::Block>;
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fn block_all(&self, span: Span,
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view_items: Vec<ast::ViewItem> ,
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stmts: Vec<@ast::Stmt> ,
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expr: Option<@ast::Expr>) -> P<ast::Block>;
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// expressions
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fn expr(&self, span: Span, node: ast::Expr_) -> @ast::Expr;
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fn expr_path(&self, path: ast::Path) -> @ast::Expr;
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fn expr_ident(&self, span: Span, id: ast::Ident) -> @ast::Expr;
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fn expr_self(&self, span: Span) -> @ast::Expr;
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fn expr_binary(&self, sp: Span, op: ast::BinOp,
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lhs: @ast::Expr, rhs: @ast::Expr) -> @ast::Expr;
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fn expr_deref(&self, sp: Span, e: @ast::Expr) -> @ast::Expr;
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fn expr_unary(&self, sp: Span, op: ast::UnOp, e: @ast::Expr) -> @ast::Expr;
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fn expr_managed(&self, sp: Span, e: @ast::Expr) -> @ast::Expr;
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fn expr_addr_of(&self, sp: Span, e: @ast::Expr) -> @ast::Expr;
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fn expr_mut_addr_of(&self, sp: Span, e: @ast::Expr) -> @ast::Expr;
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fn expr_field_access(&self, span: Span, expr: @ast::Expr, ident: ast::Ident) -> @ast::Expr;
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fn expr_call(&self, span: Span, expr: @ast::Expr, args: Vec<@ast::Expr> ) -> @ast::Expr;
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fn expr_call_ident(&self, span: Span, id: ast::Ident, args: Vec<@ast::Expr> ) -> @ast::Expr;
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fn expr_call_global(&self, sp: Span, fn_path: Vec<ast::Ident> ,
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args: Vec<@ast::Expr> ) -> @ast::Expr;
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fn expr_method_call(&self, span: Span,
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expr: @ast::Expr, ident: ast::Ident,
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args: Vec<@ast::Expr> ) -> @ast::Expr;
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fn expr_block(&self, b: P<ast::Block>) -> @ast::Expr;
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fn expr_cast(&self, sp: Span, expr: @ast::Expr, ty: P<ast::Ty>) -> @ast::Expr;
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fn field_imm(&self, span: Span, name: Ident, e: @ast::Expr) -> ast::Field;
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fn expr_struct(&self, span: Span, path: ast::Path, fields: Vec<ast::Field> ) -> @ast::Expr;
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fn expr_struct_ident(&self, span: Span, id: ast::Ident, fields: Vec<ast::Field> ) -> @ast::Expr;
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fn expr_lit(&self, sp: Span, lit: ast::Lit_) -> @ast::Expr;
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fn expr_uint(&self, span: Span, i: uint) -> @ast::Expr;
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fn expr_int(&self, sp: Span, i: int) -> @ast::Expr;
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fn expr_u8(&self, sp: Span, u: u8) -> @ast::Expr;
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fn expr_bool(&self, sp: Span, value: bool) -> @ast::Expr;
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fn expr_vstore(&self, sp: Span, expr: @ast::Expr, vst: ast::ExprVstore) -> @ast::Expr;
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fn expr_vec(&self, sp: Span, exprs: Vec<@ast::Expr> ) -> @ast::Expr;
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fn expr_vec_ng(&self, sp: Span) -> @ast::Expr;
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fn expr_vec_slice(&self, sp: Span, exprs: Vec<@ast::Expr> ) -> @ast::Expr;
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fn expr_str(&self, sp: Span, s: InternedString) -> @ast::Expr;
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fn expr_str_uniq(&self, sp: Span, s: InternedString) -> @ast::Expr;
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fn expr_some(&self, sp: Span, expr: @ast::Expr) -> @ast::Expr;
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fn expr_none(&self, sp: Span) -> @ast::Expr;
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fn expr_fail(&self, span: Span, msg: InternedString) -> @ast::Expr;
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fn expr_unreachable(&self, span: Span) -> @ast::Expr;
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fn expr_ok(&self, span: Span, expr: @ast::Expr) -> @ast::Expr;
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fn expr_err(&self, span: Span, expr: @ast::Expr) -> @ast::Expr;
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fn expr_try(&self, span: Span, head: @ast::Expr) -> @ast::Expr;
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fn pat(&self, span: Span, pat: ast::Pat_) -> @ast::Pat;
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fn pat_wild(&self, span: Span) -> @ast::Pat;
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fn pat_lit(&self, span: Span, expr: @ast::Expr) -> @ast::Pat;
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fn pat_ident(&self, span: Span, ident: ast::Ident) -> @ast::Pat;
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fn pat_ident_binding_mode(&self,
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span: Span,
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ident: ast::Ident,
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bm: ast::BindingMode) -> @ast::Pat;
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fn pat_enum(&self, span: Span, path: ast::Path, subpats: Vec<@ast::Pat> ) -> @ast::Pat;
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fn pat_struct(&self, span: Span,
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path: ast::Path, field_pats: Vec<ast::FieldPat> ) -> @ast::Pat;
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fn arm(&self, span: Span, pats: Vec<@ast::Pat> , expr: @ast::Expr) -> ast::Arm;
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fn arm_unreachable(&self, span: Span) -> ast::Arm;
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fn expr_match(&self, span: Span, arg: @ast::Expr, arms: Vec<ast::Arm> ) -> @ast::Expr;
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fn expr_if(&self, span: Span,
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cond: @ast::Expr, then: @ast::Expr, els: Option<@ast::Expr>) -> @ast::Expr;
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fn lambda_fn_decl(&self, span: Span,
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fn_decl: P<ast::FnDecl>, blk: P<ast::Block>) -> @ast::Expr;
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fn lambda(&self, span: Span, ids: Vec<ast::Ident> , blk: P<ast::Block>) -> @ast::Expr;
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fn lambda0(&self, span: Span, blk: P<ast::Block>) -> @ast::Expr;
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fn lambda1(&self, span: Span, blk: P<ast::Block>, ident: ast::Ident) -> @ast::Expr;
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fn lambda_expr(&self, span: Span, ids: Vec<ast::Ident> , blk: @ast::Expr) -> @ast::Expr;
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fn lambda_expr_0(&self, span: Span, expr: @ast::Expr) -> @ast::Expr;
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fn lambda_expr_1(&self, span: Span, expr: @ast::Expr, ident: ast::Ident) -> @ast::Expr;
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fn lambda_stmts(&self, span: Span, ids: Vec<ast::Ident> , blk: Vec<@ast::Stmt> ) -> @ast::Expr;
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fn lambda_stmts_0(&self, span: Span, stmts: Vec<@ast::Stmt> ) -> @ast::Expr;
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fn lambda_stmts_1(&self, span: Span, stmts: Vec<@ast::Stmt> , ident: ast::Ident) -> @ast::Expr;
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// items
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fn item(&self, span: Span,
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name: Ident, attrs: Vec<ast::Attribute> , node: ast::Item_) -> @ast::Item;
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fn arg(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> ast::Arg;
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// FIXME unused self
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fn fn_decl(&self, inputs: Vec<ast::Arg> , output: P<ast::Ty>) -> P<ast::FnDecl>;
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fn item_fn_poly(&self,
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span: Span,
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name: Ident,
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inputs: Vec<ast::Arg> ,
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output: P<ast::Ty>,
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generics: Generics,
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body: P<ast::Block>) -> @ast::Item;
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fn item_fn(&self,
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span: Span,
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name: Ident,
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inputs: Vec<ast::Arg> ,
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output: P<ast::Ty>,
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body: P<ast::Block>) -> @ast::Item;
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fn variant(&self, span: Span, name: Ident, tys: Vec<P<ast::Ty>> ) -> ast::Variant;
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fn item_enum_poly(&self,
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span: Span,
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name: Ident,
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enum_definition: ast::EnumDef,
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generics: Generics) -> @ast::Item;
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fn item_enum(&self, span: Span, name: Ident, enum_def: ast::EnumDef) -> @ast::Item;
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fn item_struct_poly(&self,
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span: Span,
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name: Ident,
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struct_def: ast::StructDef,
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generics: Generics) -> @ast::Item;
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fn item_struct(&self, span: Span, name: Ident, struct_def: ast::StructDef) -> @ast::Item;
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fn item_mod(&self, span: Span, inner_span: Span,
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name: Ident, attrs: Vec<ast::Attribute> ,
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vi: Vec<ast::ViewItem> , items: Vec<@ast::Item> ) -> @ast::Item;
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fn item_ty_poly(&self,
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span: Span,
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name: Ident,
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ty: P<ast::Ty>,
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generics: Generics) -> @ast::Item;
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fn item_ty(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> @ast::Item;
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fn attribute(&self, sp: Span, mi: @ast::MetaItem) -> ast::Attribute;
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fn meta_word(&self, sp: Span, w: InternedString) -> @ast::MetaItem;
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fn meta_list(&self,
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sp: Span,
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name: InternedString,
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mis: Vec<@ast::MetaItem> )
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-> @ast::MetaItem;
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fn meta_name_value(&self,
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sp: Span,
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name: InternedString,
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value: ast::Lit_)
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-> @ast::MetaItem;
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fn view_use(&self, sp: Span,
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vis: ast::Visibility, vp: @ast::ViewPath) -> ast::ViewItem;
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fn view_use_simple(&self, sp: Span, vis: ast::Visibility, path: ast::Path) -> ast::ViewItem;
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fn view_use_simple_(&self, sp: Span, vis: ast::Visibility,
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ident: ast::Ident, path: ast::Path) -> ast::ViewItem;
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fn view_use_list(&self, sp: Span, vis: ast::Visibility,
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path: Vec<ast::Ident> , imports: &[ast::Ident]) -> ast::ViewItem;
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fn view_use_glob(&self, sp: Span,
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vis: ast::Visibility, path: Vec<ast::Ident> ) -> ast::ViewItem;
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}
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impl<'a> AstBuilder for ExtCtxt<'a> {
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fn path(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path {
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self.path_all(span, false, strs, Vec::new(), Vec::new())
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}
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fn path_ident(&self, span: Span, id: ast::Ident) -> ast::Path {
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self.path(span, vec!(id))
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}
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fn path_global(&self, span: Span, strs: Vec<ast::Ident> ) -> ast::Path {
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self.path_all(span, true, strs, Vec::new(), Vec::new())
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}
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fn path_all(&self,
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sp: Span,
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global: bool,
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mut idents: Vec<ast::Ident> ,
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lifetimes: Vec<ast::Lifetime>,
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types: Vec<P<ast::Ty>> )
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-> ast::Path {
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let last_identifier = idents.pop().unwrap();
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let mut segments: Vec<ast::PathSegment> = idents.move_iter()
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.map(|ident| {
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ast::PathSegment {
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identifier: ident,
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lifetimes: Vec::new(),
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types: OwnedSlice::empty(),
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}
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}).collect();
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segments.push(ast::PathSegment {
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identifier: last_identifier,
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lifetimes: lifetimes,
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types: OwnedSlice::from_vec(types),
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});
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ast::Path {
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span: sp,
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global: global,
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segments: segments,
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}
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}
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fn ty_mt(&self, ty: P<ast::Ty>, mutbl: ast::Mutability) -> ast::MutTy {
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ast::MutTy {
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ty: ty,
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mutbl: mutbl
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}
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}
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fn ty(&self, span: Span, ty: ast::Ty_) -> P<ast::Ty> {
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P(ast::Ty {
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id: ast::DUMMY_NODE_ID,
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span: span,
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node: ty
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})
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}
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fn ty_path(&self, path: ast::Path, bounds: Option<OwnedSlice<ast::TyParamBound>>)
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-> P<ast::Ty> {
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self.ty(path.span,
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ast::TyPath(path, bounds, ast::DUMMY_NODE_ID))
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}
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// Might need to take bounds as an argument in the future, if you ever want
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// to generate a bounded existential trait type.
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fn ty_ident(&self, span: Span, ident: ast::Ident)
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-> P<ast::Ty> {
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self.ty_path(self.path_ident(span, ident), None)
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}
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fn ty_rptr(&self,
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span: Span,
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ty: P<ast::Ty>,
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lifetime: Option<ast::Lifetime>,
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mutbl: ast::Mutability)
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-> P<ast::Ty> {
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self.ty(span,
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ast::TyRptr(lifetime, self.ty_mt(ty, mutbl)))
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}
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fn ty_uniq(&self, span: Span, ty: P<ast::Ty>) -> P<ast::Ty> {
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self.ty(span, ast::TyUniq(ty))
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}
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fn ty_option(&self, ty: P<ast::Ty>) -> P<ast::Ty> {
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self.ty_path(
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self.path_all(DUMMY_SP,
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true,
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vec!(
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self.ident_of("std"),
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self.ident_of("option"),
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self.ident_of("Option")
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),
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Vec::new(),
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vec!( ty )), None)
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}
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fn ty_field_imm(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> ast::TypeField {
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ast::TypeField {
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ident: name,
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mt: ast::MutTy { ty: ty, mutbl: ast::MutImmutable },
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span: span,
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}
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}
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fn ty_infer(&self, span: Span) -> P<ast::Ty> {
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self.ty(span, ast::TyInfer)
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}
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fn ty_nil(&self) -> P<ast::Ty> {
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P(ast::Ty {
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id: ast::DUMMY_NODE_ID,
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node: ast::TyNil,
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span: DUMMY_SP,
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})
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}
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fn typaram(&self,
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span: Span,
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id: ast::Ident,
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sized: ast::Sized,
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bounds: OwnedSlice<ast::TyParamBound>,
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default: Option<P<ast::Ty>>) -> ast::TyParam {
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ast::TyParam {
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ident: id,
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id: ast::DUMMY_NODE_ID,
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sized: sized,
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bounds: bounds,
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default: default,
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span: span
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}
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}
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// these are strange, and probably shouldn't be used outside of
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// pipes. Specifically, the global version possible generates
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// incorrect code.
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fn ty_vars(&self, ty_params: &OwnedSlice<ast::TyParam>) -> Vec<P<ast::Ty>> {
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ty_params.iter().map(|p| self.ty_ident(DUMMY_SP, p.ident)).collect()
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}
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fn ty_vars_global(&self, ty_params: &OwnedSlice<ast::TyParam>) -> Vec<P<ast::Ty>> {
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ty_params.iter().map(|p| self.ty_path(
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self.path_global(DUMMY_SP, vec!(p.ident)), None)).collect()
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}
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fn strip_bounds(&self, generics: &Generics) -> Generics {
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let new_params = generics.ty_params.map(|ty_param| {
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ast::TyParam { bounds: OwnedSlice::empty(), ..*ty_param }
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});
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Generics {
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ty_params: new_params,
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.. (*generics).clone()
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}
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}
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fn trait_ref(&self, path: ast::Path) -> ast::TraitRef {
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ast::TraitRef {
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path: path,
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ref_id: ast::DUMMY_NODE_ID
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}
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}
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fn typarambound(&self, path: ast::Path) -> ast::TyParamBound {
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ast::TraitTyParamBound(self.trait_ref(path))
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}
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|
|
fn lifetime(&self, span: Span, name: ast::Name) -> ast::Lifetime {
|
|
ast::Lifetime { id: ast::DUMMY_NODE_ID, span: span, name: name }
|
|
}
|
|
|
|
fn stmt_expr(&self, expr: @ast::Expr) -> @ast::Stmt {
|
|
@respan(expr.span, ast::StmtSemi(expr, ast::DUMMY_NODE_ID))
|
|
}
|
|
|
|
fn stmt_let(&self, sp: Span, mutbl: bool, ident: ast::Ident, ex: @ast::Expr) -> @ast::Stmt {
|
|
let pat = if mutbl {
|
|
self.pat_ident_binding_mode(sp, ident, ast::BindByValue(ast::MutMutable))
|
|
} else {
|
|
self.pat_ident(sp, ident)
|
|
};
|
|
let local = @ast::Local {
|
|
ty: self.ty_infer(sp),
|
|
pat: pat,
|
|
init: Some(ex),
|
|
id: ast::DUMMY_NODE_ID,
|
|
span: sp,
|
|
};
|
|
let decl = respan(sp, ast::DeclLocal(local));
|
|
@respan(sp, ast::StmtDecl(@decl, ast::DUMMY_NODE_ID))
|
|
}
|
|
|
|
fn stmt_let_typed(&self,
|
|
sp: Span,
|
|
mutbl: bool,
|
|
ident: ast::Ident,
|
|
typ: P<ast::Ty>,
|
|
ex: @ast::Expr)
|
|
-> @ast::Stmt {
|
|
let pat = if mutbl {
|
|
self.pat_ident_binding_mode(sp, ident, ast::BindByValue(ast::MutMutable))
|
|
} else {
|
|
self.pat_ident(sp, ident)
|
|
};
|
|
let local = @ast::Local {
|
|
ty: typ,
|
|
pat: pat,
|
|
init: Some(ex),
|
|
id: ast::DUMMY_NODE_ID,
|
|
span: sp,
|
|
};
|
|
let decl = respan(sp, ast::DeclLocal(local));
|
|
@respan(sp, ast::StmtDecl(@decl, ast::DUMMY_NODE_ID))
|
|
}
|
|
|
|
fn block(&self, span: Span, stmts: Vec<@ast::Stmt> , expr: Option<@Expr>) -> P<ast::Block> {
|
|
self.block_all(span, Vec::new(), stmts, expr)
|
|
}
|
|
|
|
fn block_expr(&self, expr: @ast::Expr) -> P<ast::Block> {
|
|
self.block_all(expr.span, Vec::new(), Vec::new(), Some(expr))
|
|
}
|
|
fn block_all(&self,
|
|
span: Span,
|
|
view_items: Vec<ast::ViewItem> ,
|
|
stmts: Vec<@ast::Stmt> ,
|
|
expr: Option<@ast::Expr>) -> P<ast::Block> {
|
|
P(ast::Block {
|
|
view_items: view_items,
|
|
stmts: stmts,
|
|
expr: expr,
|
|
id: ast::DUMMY_NODE_ID,
|
|
rules: ast::DefaultBlock,
|
|
span: span,
|
|
})
|
|
}
|
|
|
|
fn expr(&self, span: Span, node: ast::Expr_) -> @ast::Expr {
|
|
@ast::Expr {
|
|
id: ast::DUMMY_NODE_ID,
|
|
node: node,
|
|
span: span,
|
|
}
|
|
}
|
|
|
|
fn expr_path(&self, path: ast::Path) -> @ast::Expr {
|
|
self.expr(path.span, ast::ExprPath(path))
|
|
}
|
|
|
|
fn expr_ident(&self, span: Span, id: ast::Ident) -> @ast::Expr {
|
|
self.expr_path(self.path_ident(span, id))
|
|
}
|
|
fn expr_self(&self, span: Span) -> @ast::Expr {
|
|
self.expr_ident(span, special_idents::self_)
|
|
}
|
|
|
|
fn expr_binary(&self, sp: Span, op: ast::BinOp,
|
|
lhs: @ast::Expr, rhs: @ast::Expr) -> @ast::Expr {
|
|
self.expr(sp, ast::ExprBinary(op, lhs, rhs))
|
|
}
|
|
|
|
fn expr_deref(&self, sp: Span, e: @ast::Expr) -> @ast::Expr {
|
|
self.expr_unary(sp, ast::UnDeref, e)
|
|
}
|
|
fn expr_unary(&self, sp: Span, op: ast::UnOp, e: @ast::Expr) -> @ast::Expr {
|
|
self.expr(sp, ast::ExprUnary(op, e))
|
|
}
|
|
|
|
fn expr_managed(&self, sp: Span, e: @ast::Expr) -> @ast::Expr {
|
|
self.expr_unary(sp, ast::UnBox, e)
|
|
}
|
|
|
|
fn expr_field_access(&self, sp: Span, expr: @ast::Expr, ident: ast::Ident) -> @ast::Expr {
|
|
self.expr(sp, ast::ExprField(expr, ident, Vec::new()))
|
|
}
|
|
fn expr_addr_of(&self, sp: Span, e: @ast::Expr) -> @ast::Expr {
|
|
self.expr(sp, ast::ExprAddrOf(ast::MutImmutable, e))
|
|
}
|
|
fn expr_mut_addr_of(&self, sp: Span, e: @ast::Expr) -> @ast::Expr {
|
|
self.expr(sp, ast::ExprAddrOf(ast::MutMutable, e))
|
|
}
|
|
|
|
fn expr_call(&self, span: Span, expr: @ast::Expr, args: Vec<@ast::Expr> ) -> @ast::Expr {
|
|
self.expr(span, ast::ExprCall(expr, args))
|
|
}
|
|
fn expr_call_ident(&self, span: Span, id: ast::Ident, args: Vec<@ast::Expr> ) -> @ast::Expr {
|
|
self.expr(span, ast::ExprCall(self.expr_ident(span, id), args))
|
|
}
|
|
fn expr_call_global(&self, sp: Span, fn_path: Vec<ast::Ident> ,
|
|
args: Vec<@ast::Expr> ) -> @ast::Expr {
|
|
let pathexpr = self.expr_path(self.path_global(sp, fn_path));
|
|
self.expr_call(sp, pathexpr, args)
|
|
}
|
|
fn expr_method_call(&self, span: Span,
|
|
expr: @ast::Expr,
|
|
ident: ast::Ident,
|
|
mut args: Vec<@ast::Expr> ) -> @ast::Expr {
|
|
let id = Spanned { node: ident, span: span };
|
|
args.unshift(expr);
|
|
self.expr(span, ast::ExprMethodCall(id, Vec::new(), args))
|
|
}
|
|
fn expr_block(&self, b: P<ast::Block>) -> @ast::Expr {
|
|
self.expr(b.span, ast::ExprBlock(b))
|
|
}
|
|
fn field_imm(&self, span: Span, name: Ident, e: @ast::Expr) -> ast::Field {
|
|
ast::Field { ident: respan(span, name), expr: e, span: span }
|
|
}
|
|
fn expr_struct(&self, span: Span, path: ast::Path, fields: Vec<ast::Field> ) -> @ast::Expr {
|
|
self.expr(span, ast::ExprStruct(path, fields, None))
|
|
}
|
|
fn expr_struct_ident(&self, span: Span,
|
|
id: ast::Ident, fields: Vec<ast::Field> ) -> @ast::Expr {
|
|
self.expr_struct(span, self.path_ident(span, id), fields)
|
|
}
|
|
|
|
fn expr_lit(&self, sp: Span, lit: ast::Lit_) -> @ast::Expr {
|
|
self.expr(sp, ast::ExprLit(@respan(sp, lit)))
|
|
}
|
|
fn expr_uint(&self, span: Span, i: uint) -> @ast::Expr {
|
|
self.expr_lit(span, ast::LitUint(i as u64, ast::TyU))
|
|
}
|
|
fn expr_int(&self, sp: Span, i: int) -> @ast::Expr {
|
|
self.expr_lit(sp, ast::LitInt(i as i64, ast::TyI))
|
|
}
|
|
fn expr_u8(&self, sp: Span, u: u8) -> @ast::Expr {
|
|
self.expr_lit(sp, ast::LitUint(u as u64, ast::TyU8))
|
|
}
|
|
fn expr_bool(&self, sp: Span, value: bool) -> @ast::Expr {
|
|
self.expr_lit(sp, ast::LitBool(value))
|
|
}
|
|
|
|
fn expr_vstore(&self, sp: Span, expr: @ast::Expr, vst: ast::ExprVstore) -> @ast::Expr {
|
|
self.expr(sp, ast::ExprVstore(expr, vst))
|
|
}
|
|
fn expr_vec(&self, sp: Span, exprs: Vec<@ast::Expr> ) -> @ast::Expr {
|
|
self.expr(sp, ast::ExprVec(exprs))
|
|
}
|
|
fn expr_vec_ng(&self, sp: Span) -> @ast::Expr {
|
|
self.expr_call_global(sp,
|
|
vec!(self.ident_of("std"),
|
|
self.ident_of("vec"),
|
|
self.ident_of("Vec"),
|
|
self.ident_of("new")),
|
|
Vec::new())
|
|
}
|
|
fn expr_vec_slice(&self, sp: Span, exprs: Vec<@ast::Expr> ) -> @ast::Expr {
|
|
self.expr_vstore(sp, self.expr_vec(sp, exprs), ast::ExprVstoreSlice)
|
|
}
|
|
fn expr_str(&self, sp: Span, s: InternedString) -> @ast::Expr {
|
|
self.expr_lit(sp, ast::LitStr(s, ast::CookedStr))
|
|
}
|
|
fn expr_str_uniq(&self, sp: Span, s: InternedString) -> @ast::Expr {
|
|
self.expr_vstore(sp, self.expr_str(sp, s), ast::ExprVstoreUniq)
|
|
}
|
|
|
|
|
|
fn expr_cast(&self, sp: Span, expr: @ast::Expr, ty: P<ast::Ty>) -> @ast::Expr {
|
|
self.expr(sp, ast::ExprCast(expr, ty))
|
|
}
|
|
|
|
|
|
fn expr_some(&self, sp: Span, expr: @ast::Expr) -> @ast::Expr {
|
|
let some = vec!(
|
|
self.ident_of("std"),
|
|
self.ident_of("option"),
|
|
self.ident_of("Some"));
|
|
self.expr_call_global(sp, some, vec!(expr))
|
|
}
|
|
|
|
fn expr_none(&self, sp: Span) -> @ast::Expr {
|
|
let none = self.path_global(sp, vec!(
|
|
self.ident_of("std"),
|
|
self.ident_of("option"),
|
|
self.ident_of("None")));
|
|
self.expr_path(none)
|
|
}
|
|
|
|
fn expr_fail(&self, span: Span, msg: InternedString) -> @ast::Expr {
|
|
let loc = self.codemap().lookup_char_pos(span.lo);
|
|
self.expr_call_global(
|
|
span,
|
|
vec!(
|
|
self.ident_of("std"),
|
|
self.ident_of("rt"),
|
|
self.ident_of("begin_unwind")),
|
|
vec!(
|
|
self.expr_str(span, msg),
|
|
self.expr_str(span,
|
|
token::intern_and_get_ident(loc.file
|
|
.name
|
|
.as_slice())),
|
|
self.expr_uint(span, loc.line)))
|
|
}
|
|
|
|
fn expr_unreachable(&self, span: Span) -> @ast::Expr {
|
|
self.expr_fail(span,
|
|
InternedString::new(
|
|
"internal error: entered unreachable code"))
|
|
}
|
|
|
|
fn expr_ok(&self, sp: Span, expr: @ast::Expr) -> @ast::Expr {
|
|
let ok = vec!(
|
|
self.ident_of("std"),
|
|
self.ident_of("result"),
|
|
self.ident_of("Ok"));
|
|
self.expr_call_global(sp, ok, vec!(expr))
|
|
}
|
|
|
|
fn expr_err(&self, sp: Span, expr: @ast::Expr) -> @ast::Expr {
|
|
let err = vec!(
|
|
self.ident_of("std"),
|
|
self.ident_of("result"),
|
|
self.ident_of("Err"));
|
|
self.expr_call_global(sp, err, vec!(expr))
|
|
}
|
|
|
|
fn expr_try(&self, sp: Span, head: @ast::Expr) -> @ast::Expr {
|
|
let ok = self.ident_of("Ok");
|
|
let ok_path = self.path_ident(sp, ok);
|
|
let err = self.ident_of("Err");
|
|
let err_path = self.path_ident(sp, err);
|
|
|
|
let binding_variable = self.ident_of("__try_var");
|
|
let binding_pat = self.pat_ident(sp, binding_variable);
|
|
let binding_expr = self.expr_ident(sp, binding_variable);
|
|
|
|
// Ok(__try_var) pattern
|
|
let ok_pat = self.pat_enum(sp, ok_path, vec!(binding_pat));
|
|
|
|
// Err(__try_var) (pattern and expression resp.)
|
|
let err_pat = self.pat_enum(sp, err_path, vec!(binding_pat));
|
|
let err_inner_expr = self.expr_call_ident(sp, err, vec!(binding_expr));
|
|
// return Err(__try_var)
|
|
let err_expr = self.expr(sp, ast::ExprRet(Some(err_inner_expr)));
|
|
|
|
// Ok(__try_var) => __try_var
|
|
let ok_arm = self.arm(sp, vec!(ok_pat), binding_expr);
|
|
// Err(__try_var) => return Err(__try_var)
|
|
let err_arm = self.arm(sp, vec!(err_pat), err_expr);
|
|
|
|
// match head { Ok() => ..., Err() => ... }
|
|
self.expr_match(sp, head, vec!(ok_arm, err_arm))
|
|
}
|
|
|
|
|
|
fn pat(&self, span: Span, pat: ast::Pat_) -> @ast::Pat {
|
|
@ast::Pat { id: ast::DUMMY_NODE_ID, node: pat, span: span }
|
|
}
|
|
fn pat_wild(&self, span: Span) -> @ast::Pat {
|
|
self.pat(span, ast::PatWild)
|
|
}
|
|
fn pat_lit(&self, span: Span, expr: @ast::Expr) -> @ast::Pat {
|
|
self.pat(span, ast::PatLit(expr))
|
|
}
|
|
fn pat_ident(&self, span: Span, ident: ast::Ident) -> @ast::Pat {
|
|
self.pat_ident_binding_mode(span, ident, ast::BindByValue(ast::MutImmutable))
|
|
}
|
|
|
|
fn pat_ident_binding_mode(&self,
|
|
span: Span,
|
|
ident: ast::Ident,
|
|
bm: ast::BindingMode) -> @ast::Pat {
|
|
let path = self.path_ident(span, ident);
|
|
let pat = ast::PatIdent(bm, path, None);
|
|
self.pat(span, pat)
|
|
}
|
|
fn pat_enum(&self, span: Span, path: ast::Path, subpats: Vec<@ast::Pat> ) -> @ast::Pat {
|
|
let pat = ast::PatEnum(path, Some(subpats));
|
|
self.pat(span, pat)
|
|
}
|
|
fn pat_struct(&self, span: Span,
|
|
path: ast::Path, field_pats: Vec<ast::FieldPat> ) -> @ast::Pat {
|
|
let pat = ast::PatStruct(path, field_pats, false);
|
|
self.pat(span, pat)
|
|
}
|
|
|
|
fn arm(&self, _span: Span, pats: Vec<@ast::Pat> , expr: @ast::Expr) -> ast::Arm {
|
|
ast::Arm {
|
|
attrs: vec!(),
|
|
pats: pats,
|
|
guard: None,
|
|
body: expr
|
|
}
|
|
}
|
|
|
|
fn arm_unreachable(&self, span: Span) -> ast::Arm {
|
|
self.arm(span, vec!(self.pat_wild(span)), self.expr_unreachable(span))
|
|
}
|
|
|
|
fn expr_match(&self, span: Span, arg: @ast::Expr, arms: Vec<ast::Arm> ) -> @Expr {
|
|
self.expr(span, ast::ExprMatch(arg, arms))
|
|
}
|
|
|
|
fn expr_if(&self, span: Span,
|
|
cond: @ast::Expr, then: @ast::Expr, els: Option<@ast::Expr>) -> @ast::Expr {
|
|
let els = els.map(|x| self.expr_block(self.block_expr(x)));
|
|
self.expr(span, ast::ExprIf(cond, self.block_expr(then), els))
|
|
}
|
|
|
|
fn lambda_fn_decl(&self, span: Span,
|
|
fn_decl: P<ast::FnDecl>, blk: P<ast::Block>) -> @ast::Expr {
|
|
self.expr(span, ast::ExprFnBlock(fn_decl, blk))
|
|
}
|
|
fn lambda(&self, span: Span, ids: Vec<ast::Ident> , blk: P<ast::Block>) -> @ast::Expr {
|
|
let fn_decl = self.fn_decl(
|
|
ids.iter().map(|id| self.arg(span, *id, self.ty_infer(span))).collect(),
|
|
self.ty_infer(span));
|
|
|
|
self.expr(span, ast::ExprFnBlock(fn_decl, blk))
|
|
}
|
|
fn lambda0(&self, span: Span, blk: P<ast::Block>) -> @ast::Expr {
|
|
self.lambda(span, Vec::new(), blk)
|
|
}
|
|
|
|
fn lambda1(&self, span: Span, blk: P<ast::Block>, ident: ast::Ident) -> @ast::Expr {
|
|
self.lambda(span, vec!(ident), blk)
|
|
}
|
|
|
|
fn lambda_expr(&self, span: Span, ids: Vec<ast::Ident> , expr: @ast::Expr) -> @ast::Expr {
|
|
self.lambda(span, ids, self.block_expr(expr))
|
|
}
|
|
fn lambda_expr_0(&self, span: Span, expr: @ast::Expr) -> @ast::Expr {
|
|
self.lambda0(span, self.block_expr(expr))
|
|
}
|
|
fn lambda_expr_1(&self, span: Span, expr: @ast::Expr, ident: ast::Ident) -> @ast::Expr {
|
|
self.lambda1(span, self.block_expr(expr), ident)
|
|
}
|
|
|
|
fn lambda_stmts(&self,
|
|
span: Span,
|
|
ids: Vec<ast::Ident>,
|
|
stmts: Vec<@ast::Stmt>)
|
|
-> @ast::Expr {
|
|
self.lambda(span, ids, self.block(span, stmts, None))
|
|
}
|
|
fn lambda_stmts_0(&self, span: Span, stmts: Vec<@ast::Stmt> ) -> @ast::Expr {
|
|
self.lambda0(span, self.block(span, stmts, None))
|
|
}
|
|
fn lambda_stmts_1(&self, span: Span, stmts: Vec<@ast::Stmt> , ident: ast::Ident) -> @ast::Expr {
|
|
self.lambda1(span, self.block(span, stmts, None), ident)
|
|
}
|
|
|
|
fn arg(&self, span: Span, ident: ast::Ident, ty: P<ast::Ty>) -> ast::Arg {
|
|
let arg_pat = self.pat_ident(span, ident);
|
|
ast::Arg {
|
|
ty: ty,
|
|
pat: arg_pat,
|
|
id: ast::DUMMY_NODE_ID
|
|
}
|
|
}
|
|
|
|
// FIXME unused self
|
|
fn fn_decl(&self, inputs: Vec<ast::Arg> , output: P<ast::Ty>) -> P<ast::FnDecl> {
|
|
P(ast::FnDecl {
|
|
inputs: inputs,
|
|
output: output,
|
|
cf: ast::Return,
|
|
variadic: false
|
|
})
|
|
}
|
|
|
|
fn item(&self, span: Span,
|
|
name: Ident, attrs: Vec<ast::Attribute> , node: ast::Item_) -> @ast::Item {
|
|
// FIXME: Would be nice if our generated code didn't violate
|
|
// Rust coding conventions
|
|
@ast::Item { ident: name,
|
|
attrs: attrs,
|
|
id: ast::DUMMY_NODE_ID,
|
|
node: node,
|
|
vis: ast::Inherited,
|
|
span: span }
|
|
}
|
|
|
|
fn item_fn_poly(&self,
|
|
span: Span,
|
|
name: Ident,
|
|
inputs: Vec<ast::Arg> ,
|
|
output: P<ast::Ty>,
|
|
generics: Generics,
|
|
body: P<ast::Block>) -> @ast::Item {
|
|
self.item(span,
|
|
name,
|
|
Vec::new(),
|
|
ast::ItemFn(self.fn_decl(inputs, output),
|
|
ast::NormalFn,
|
|
abi::Rust,
|
|
generics,
|
|
body))
|
|
}
|
|
|
|
fn item_fn(&self,
|
|
span: Span,
|
|
name: Ident,
|
|
inputs: Vec<ast::Arg> ,
|
|
output: P<ast::Ty>,
|
|
body: P<ast::Block>
|
|
) -> @ast::Item {
|
|
self.item_fn_poly(
|
|
span,
|
|
name,
|
|
inputs,
|
|
output,
|
|
ast_util::empty_generics(),
|
|
body)
|
|
}
|
|
|
|
fn variant(&self, span: Span, name: Ident, tys: Vec<P<ast::Ty>> ) -> ast::Variant {
|
|
let args = tys.move_iter().map(|ty| {
|
|
ast::VariantArg { ty: ty, id: ast::DUMMY_NODE_ID }
|
|
}).collect();
|
|
|
|
respan(span,
|
|
ast::Variant_ {
|
|
name: name,
|
|
attrs: Vec::new(),
|
|
kind: ast::TupleVariantKind(args),
|
|
id: ast::DUMMY_NODE_ID,
|
|
disr_expr: None,
|
|
vis: ast::Public
|
|
})
|
|
}
|
|
|
|
fn item_enum_poly(&self, span: Span, name: Ident,
|
|
enum_definition: ast::EnumDef,
|
|
generics: Generics) -> @ast::Item {
|
|
self.item(span, name, Vec::new(), ast::ItemEnum(enum_definition, generics))
|
|
}
|
|
|
|
fn item_enum(&self, span: Span, name: Ident,
|
|
enum_definition: ast::EnumDef) -> @ast::Item {
|
|
self.item_enum_poly(span, name, enum_definition,
|
|
ast_util::empty_generics())
|
|
}
|
|
|
|
fn item_struct(&self, span: Span, name: Ident,
|
|
struct_def: ast::StructDef) -> @ast::Item {
|
|
self.item_struct_poly(
|
|
span,
|
|
name,
|
|
struct_def,
|
|
ast_util::empty_generics()
|
|
)
|
|
}
|
|
|
|
fn item_struct_poly(&self, span: Span, name: Ident,
|
|
struct_def: ast::StructDef, generics: Generics) -> @ast::Item {
|
|
self.item(span, name, Vec::new(), ast::ItemStruct(@struct_def, generics))
|
|
}
|
|
|
|
fn item_mod(&self, span: Span, inner_span: Span, name: Ident,
|
|
attrs: Vec<ast::Attribute> ,
|
|
vi: Vec<ast::ViewItem> ,
|
|
items: Vec<@ast::Item> ) -> @ast::Item {
|
|
self.item(
|
|
span,
|
|
name,
|
|
attrs,
|
|
ast::ItemMod(ast::Mod {
|
|
inner: inner_span,
|
|
view_items: vi,
|
|
items: items,
|
|
})
|
|
)
|
|
}
|
|
|
|
fn item_ty_poly(&self, span: Span, name: Ident, ty: P<ast::Ty>,
|
|
generics: Generics) -> @ast::Item {
|
|
self.item(span, name, Vec::new(), ast::ItemTy(ty, generics))
|
|
}
|
|
|
|
fn item_ty(&self, span: Span, name: Ident, ty: P<ast::Ty>) -> @ast::Item {
|
|
self.item_ty_poly(span, name, ty, ast_util::empty_generics())
|
|
}
|
|
|
|
fn attribute(&self, sp: Span, mi: @ast::MetaItem) -> ast::Attribute {
|
|
respan(sp, ast::Attribute_ {
|
|
style: ast::AttrOuter,
|
|
value: mi,
|
|
is_sugared_doc: false,
|
|
})
|
|
}
|
|
|
|
fn meta_word(&self, sp: Span, w: InternedString) -> @ast::MetaItem {
|
|
@respan(sp, ast::MetaWord(w))
|
|
}
|
|
fn meta_list(&self,
|
|
sp: Span,
|
|
name: InternedString,
|
|
mis: Vec<@ast::MetaItem> )
|
|
-> @ast::MetaItem {
|
|
@respan(sp, ast::MetaList(name, mis))
|
|
}
|
|
fn meta_name_value(&self,
|
|
sp: Span,
|
|
name: InternedString,
|
|
value: ast::Lit_)
|
|
-> @ast::MetaItem {
|
|
@respan(sp, ast::MetaNameValue(name, respan(sp, value)))
|
|
}
|
|
|
|
fn view_use(&self, sp: Span,
|
|
vis: ast::Visibility, vp: @ast::ViewPath) -> ast::ViewItem {
|
|
ast::ViewItem {
|
|
node: ast::ViewItemUse(vp),
|
|
attrs: Vec::new(),
|
|
vis: vis,
|
|
span: sp
|
|
}
|
|
}
|
|
|
|
fn view_use_simple(&self, sp: Span, vis: ast::Visibility, path: ast::Path) -> ast::ViewItem {
|
|
let last = path.segments.last().unwrap().identifier;
|
|
self.view_use_simple_(sp, vis, last, path)
|
|
}
|
|
|
|
fn view_use_simple_(&self, sp: Span, vis: ast::Visibility,
|
|
ident: ast::Ident, path: ast::Path) -> ast::ViewItem {
|
|
self.view_use(sp, vis,
|
|
@respan(sp,
|
|
ast::ViewPathSimple(ident,
|
|
path,
|
|
ast::DUMMY_NODE_ID)))
|
|
}
|
|
|
|
fn view_use_list(&self, sp: Span, vis: ast::Visibility,
|
|
path: Vec<ast::Ident> , imports: &[ast::Ident]) -> ast::ViewItem {
|
|
let imports = imports.iter().map(|id| {
|
|
respan(sp, ast::PathListIdent_ { name: *id, id: ast::DUMMY_NODE_ID })
|
|
}).collect();
|
|
|
|
self.view_use(sp, vis,
|
|
@respan(sp,
|
|
ast::ViewPathList(self.path(sp, path),
|
|
imports,
|
|
ast::DUMMY_NODE_ID)))
|
|
}
|
|
|
|
fn view_use_glob(&self, sp: Span,
|
|
vis: ast::Visibility, path: Vec<ast::Ident> ) -> ast::ViewItem {
|
|
self.view_use(sp, vis,
|
|
@respan(sp,
|
|
ast::ViewPathGlob(self.path(sp, path), ast::DUMMY_NODE_ID)))
|
|
}
|
|
}
|
|
|
|
struct Duplicator<'a> {
|
|
cx: &'a ExtCtxt<'a>,
|
|
}
|
|
|
|
impl<'a> Folder for Duplicator<'a> {
|
|
fn new_id(&mut self, _: NodeId) -> NodeId {
|
|
ast::DUMMY_NODE_ID
|
|
}
|
|
}
|
|
|
|
pub trait Duplicate {
|
|
//
|
|
// Duplication functions
|
|
//
|
|
// These functions just duplicate AST nodes.
|
|
//
|
|
|
|
fn duplicate(&self, cx: &ExtCtxt) -> Self;
|
|
}
|
|
|
|
impl Duplicate for @ast::Expr {
|
|
fn duplicate(&self, cx: &ExtCtxt) -> @ast::Expr {
|
|
let mut folder = Duplicator {
|
|
cx: cx,
|
|
};
|
|
folder.fold_expr(*self)
|
|
}
|
|
}
|