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Improve pretty-printing of constraints

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(Methods still don't seem to have constraints associated with them.
Method types do, so I guess this is a TODO.)
This commit is contained in:
Marijn Haverbeke
2011-07-27 16:50:51 +02:00
parent 30377a0d05
commit 0334faef1f
1 changed files with 15 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/comp/syntax/print/pprust.rs
+15 -13
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@@ -105,7 +105,7 @@ fn print_crate(cm: &codemap, crate: @ast::crate, filename: str,
fn fun_to_str(f: &ast::_fn, name: str, params: &ast::ty_param[]) -> str {
let writer = ioivec::string_writer();
let s = rust_printer(writer.get_writer());
print_fn(s, f.decl, f.proto, name, params);
print_fn(s, f.decl, f.proto, name, params, f.decl.constraints);
eof(s.s);
ret writer.get_str();
}
@@ -337,8 +337,6 @@ fn print_field(s: &ps, f: &ast::ty_field) {
ast::ty_constr(t, cs) {
print_type(s, *t);
space(s.s);
word(s.s, ":");
space(s.s);
word(s.s, ast_ty_constrs_str(cs));
}
}
@@ -363,7 +361,8 @@ fn print_native_item(s: &ps, item: &@ast::native_item) {
ast::native_item_fn(lname, decl, typarams) {
print_fn(s, decl, ast::proto_fn, item.ident, typarams);
print_fn(s, decl, ast::proto_fn, item.ident, typarams,
decl.constraints);
alt lname {
none. { }
some(ss) { space(s.s); word_space(s, "="); print_string(s, ss); }
@@ -396,7 +395,8 @@ fn print_item(s: &ps, item: &@ast::item) {
}
ast::item_fn(_fn, typarams) {
print_fn(s, _fn.decl, _fn.proto, item.ident, typarams);
print_fn(s, _fn.decl, _fn.proto, item.ident, typarams,
_fn.decl.constraints);
word(s.s, " ");
print_block(s, _fn.body);
}
@@ -502,7 +502,7 @@ fn print_field(s: &ps, field: &ast::obj_field) {
hardbreak_if_not_bol(s);
maybe_print_comment(s, meth.span.lo);
print_fn(s, meth.node.meth.decl, meth.node.meth.proto,
meth.node.ident, typarams);
meth.node.ident, typarams, ~[]);
word(s.s, " ");
print_block(s, meth.node.meth.body);
}
@@ -821,7 +821,7 @@ fn print_opt(s: &ps, expr: &option::t[@ast::expr]) {
}
ast::expr_fn(f) {
head(s, proto_to_str(f.proto));
print_fn_args_and_ret(s, f.decl);
print_fn_args_and_ret(s, f.decl, ~[]);
space(s.s);
print_block(s, f.body);
}
@@ -970,12 +970,12 @@ fn get_span(f: &ast::anon_obj_field) -> codemap::span {
bopen(s);
// Methods
for meth: @ast::method in anon_obj.methods {
for meth: @ast::method in anon_obj.methods {
let typarams: ast::ty_param[] = ~[];
hardbreak_if_not_bol(s);
maybe_print_comment(s, meth.span.lo);
print_fn(s, meth.node.meth.decl, meth.node.meth.proto,
meth.node.ident, typarams);
meth.node.ident, typarams, ~[]);
word(s.s, " ");
print_block(s, meth.node.meth.body);
}
@@ -1102,17 +1102,18 @@ fn print_field(s: &ps, f: &ast::field_pat) {
}
fn print_fn(s: &ps, decl: ast::fn_decl, proto: ast::proto, name: str,
typarams: &ast::ty_param[]) {
typarams: &ast::ty_param[], constrs: (@ast::constr)[]) {
alt decl.purity {
ast::impure_fn. { head(s, proto_to_str(proto)); }
_ { head(s, "pred"); }
}
word(s.s, name);
print_type_params(s, typarams);
print_fn_args_and_ret(s, decl);
print_fn_args_and_ret(s, decl, constrs);
}
fn print_fn_args_and_ret(s: &ps, decl: &ast::fn_decl) {
fn print_fn_args_and_ret(s: &ps, decl: &ast::fn_decl,
constrs: (@ast::constr)[]) {
popen(s);
fn print_arg(s: &ps, x: &ast::arg) {
ibox(s, indent_unit);
@@ -1123,6 +1124,7 @@ fn print_arg(s: &ps, x: &ast::arg) {
}
commasep(s, inconsistent, decl.inputs, print_arg);
pclose(s);
word(s.s, ast_constrs_str(constrs));
maybe_print_comment(s, decl.output.span.lo);
if decl.output.node != ast::ty_nil {
space_if_not_bol(s);
@@ -1275,7 +1277,7 @@ fn print_arg(s: &ps, input: &ast::ty_arg) {
}
end(s);
}
word_space(s, ast_constrs_str(constrs));
word(s.s, ast_constrs_str(constrs));
end(s);
}