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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use std::map::HashMap;
use syntax::ast;
use syntax::codemap::{span};
use syntax::visit;
use syntax::print;
fn indent<R>(op: fn() -> R) -> R {
// Use in conjunction with the log post-processor like `src/etc/indenter`
// to make debug output more readable.
debug!(">>");
let r = op();
debug!("<< (Result = %?)", r);
move r
}
struct _indenter {
_i: (),
drop { debug!("<<"); }
}
fn _indenter(_i: ()) -> _indenter {
_indenter {
_i: ()
}
}
fn indenter() -> _indenter {
debug!(">>");
_indenter(())
}
type flag = HashMap<~str, ()>;
fn field_expr(f: ast::field) -> @ast::expr { return f.node.expr; }
fn field_exprs(fields: ~[ast::field]) -> ~[@ast::expr] {
fields.map(|f| f.node.expr)
}
// Takes a predicate p, returns true iff p is true for any subexpressions
// of b -- skipping any inner loops (loop, while, loop_body)
fn loop_query(b: ast::blk, p: fn@(ast::expr_) -> bool) -> bool {
let rs = @mut false;
let visit_expr =
|e: @ast::expr, &&flag: @mut bool, v: visit::vt<@mut bool>| {
*flag |= p(e.node);
match e.node {
// Skip inner loops, since a break in the inner loop isn't a
// break inside the outer loop
ast::expr_loop(*) | ast::expr_while(*)
| ast::expr_loop_body(*) => {}
_ => visit::visit_expr(e, flag, v)
}
};
let v = visit::mk_vt(@{visit_expr: visit_expr
,.. *visit::default_visitor()});
visit::visit_block(b, rs, v);
return *rs;
}
// Takes a predicate p, returns true iff p is true for any subexpressions
// of b -- skipping any inner loops (loop, while, loop_body)
fn block_query(b: ast::blk, p: fn@(@ast::expr) -> bool) -> bool {
let rs = @mut false;
let visit_expr =
|e: @ast::expr, &&flag: @mut bool, v: visit::vt<@mut bool>| {
*flag |= p(e);
visit::visit_expr(e, flag, v)
};
let v = visit::mk_vt(@{visit_expr: visit_expr
,.. *visit::default_visitor()});
visit::visit_block(b, rs, v);
return *rs;
}
fn local_rhs_span(l: @ast::local, def: span) -> span {
match l.node.init {
Some(i) => return i.span,
_ => return def
}
}
fn is_main_name(path: syntax::ast_map::path) -> bool {
vec::last(path) == syntax::ast_map::path_name(
syntax::parse::token::special_idents::main
)
}
fn pluralize(n: uint, s: ~str) -> ~str {
if n == 1 { s }
else { str::concat([s, ~"s"]) }
}
//
// Local Variables:
// mode: rust
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// End:
//
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