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Simple refactoring in the pretty printer.

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Introduce a proto_to_str function to find the string representation of a given
proto instead of casing on the proto in multiple places.
This commit is contained in:
Michael Sullivan 2011-07-19 18:17:49 -07:00
parent 9bd945639b
commit da2a7e5bd2
1 changed files with 10 additions and 7 deletions
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17
src/comp/syntax/print/pprust.rs
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@ -848,7 +848,7 @@ fn print_expr(&ps s, &@ast::expr expr) {
bclose(s, expr.span);
}
case (ast::expr_fn(?f)) {
head(s, "fn");
head(s, proto_to_str(f.proto));
print_fn_args_and_ret(s, f.decl);
space(s.s);
print_block(s, f.body);
@ -1147,9 +1147,7 @@ fn print_fn(&ps s, ast::fn_decl decl, ast::proto proto, str name,
&ast::ty_param[] typarams) {
alt (decl.purity) {
case (ast::impure_fn) {
if (proto == ast::proto_iter) {
head(s, "iter");
} else { head(s, "fn"); }
head(s, proto_to_str(proto));
}
case (_) { head(s, "pred"); }
}
@ -1308,9 +1306,7 @@ fn print_ty_fn(&ps s, &ast::proto proto, &option::t[str] id,
&ast::ty_arg[] inputs, &@ast::ty output,
&ast::controlflow cf, &(@ast::constr)[] constrs) {
ibox(s, indent_unit);
if (proto == ast::proto_fn) {
word(s.s, "fn");
} else { word(s.s, "iter"); }
word(s.s, proto_to_str(proto));
alt (id) {
case (some(?id)) { word(s.s, " "); word(s.s, id); }
case (_) { }
@ -1565,6 +1561,13 @@ fn ast_constrs_str(&(@ast::constr)[] constrs) -> str {
ret s;
}
fn proto_to_str(&ast::proto p) -> str {
ret alt (p) {
ast::proto_fn { "fn" }
ast::proto_iter { "iter" }
};
}
//
// Local Variables:
// mode: rust