mirror of
https://github.com/rust-lang/rust.git
synced 2025-04-29 03:27:44 +00:00
49 lines
2.0 KiB
Rust
49 lines
2.0 KiB
Rust
|
import base::*;
|
||
|
|
import ast;
|
||
|
|
import codemap::span;
|
||
|
|
import print::pprust;
|
||
|
|
|
||
|
|
|
||
|
|
/* #line(): expands to the current line number */
|
||
|
|
fn expand_line(cx: ext_ctxt, sp: span, arg: ast::mac_arg,
|
||
|
|
_body: ast::mac_body) -> @ast::expr {
|
||
|
|
get_mac_args(cx, sp, arg, 0u, option::some(0u), "line");
|
||
|
|
let loc = codemap::lookup_char_pos(cx.codemap(), sp.lo);
|
||
|
|
ret make_new_lit(cx, sp, ast::lit_uint(loc.line as u64, ast::ty_u));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* #col(): expands to the current column number */
|
||
|
|
fn expand_col(cx: ext_ctxt, sp: span, arg: ast::mac_arg,
|
||
|
|
_body: ast::mac_body) -> @ast::expr {
|
||
|
|
get_mac_args(cx, sp, arg, 0u, option::some(0u), "col");
|
||
|
|
let loc = codemap::lookup_char_pos(cx.codemap(), sp.lo);
|
||
|
|
ret make_new_lit(cx, sp, ast::lit_uint(loc.col as u64, ast::ty_u));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* #file(): expands to the current filename */
|
||
|
|
/* The filemap (`loc.file`) contains a bunch more information we could spit
|
||
|
|
* out if we wanted. */
|
||
|
|
fn expand_file(cx: ext_ctxt, sp: span, arg: ast::mac_arg,
|
||
|
|
_body: ast::mac_body) -> @ast::expr {
|
||
|
|
get_mac_args(cx, sp, arg, 0u, option::some(0u), "file");
|
||
|
|
let loc = codemap::lookup_char_pos(cx.codemap(), sp.lo);
|
||
|
|
ret make_new_lit(cx, sp, ast::lit_str(loc.file.name));
|
||
|
|
}
|
||
|
|
|
||
|
|
fn expand_stringify(cx: ext_ctxt, sp: span, arg: ast::mac_arg,
|
||
|
|
_body: ast::mac_body) -> @ast::expr {
|
||
|
|
let args = get_mac_args(cx, sp, arg, 1u, option::some(1u), "stringify");
|
||
|
|
ret make_new_lit(cx, sp, ast::lit_str(pprust::expr_to_str(args[0])));
|
||
|
|
}
|
||
|
|
|
||
|
|
fn expand_include(cx: ext_ctxt, sp: span, arg: ast::mac_arg,
|
||
|
|
_body: ast::mac_body) -> @ast::expr {
|
||
|
|
let args = get_mac_args(cx, sp, arg, 1u, option::some(1u), "include");
|
||
|
|
let loc = codemap::lookup_char_pos(cx.codemap(), sp.lo);
|
||
|
|
let path = path::connect(path::dirname(loc.file.name),
|
||
|
|
expr_to_str(cx, args[0], "#include requires a string literal"));
|
||
|
|
let p = parse::new_parser_from_file(cx.parse_sess(), cx.cfg(), path,
|
||
|
|
parse::parser::SOURCE_FILE);
|
||
|
|
ret parse::parser::parse_expr(p)
|
||
|
|
}
|