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Refactor the view_item code so that it is similar to the code used for

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parsing regular items.
This commit is contained in:
Rafael Ávila de Espíndola
2011-01-01 12:55:18 -05:00
parent 35c745da03
commit 5fd3d2ca55
2 changed files with 40 additions and 30 deletions
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53
src/comp/front/parser.rs
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@@ -1662,17 +1662,18 @@ impure fn parse_optional_meta(parser p) -> vec[@ast.meta_item] {
}
}
impure fn parse_use(parser p) -> @ast.use_node {
impure fn parse_use(parser p) -> @ast.view_item {
auto lo = p.get_span();
auto hi = lo;
expect(p, token.USE);
auto ident = parse_ident(p);
auto metadata = parse_optional_meta(p);
expect(p, token.SEMI);
ret @spanned(lo, hi, rec(name = ident, metadata = metadata));
auto use_decl = ast.view_item_use(ident, metadata);
ret @spanned(lo, hi, use_decl);
}
impure fn parse_rest_import_name(parser p, ast.ident id) -> @ast.import_node {
impure fn parse_rest_import_name(parser p, ast.ident id) -> @ast.view_item {
auto lo = p.get_span();
auto hi = lo;
let vec[ast.ident] identifiers = vec();
@@ -1683,10 +1684,11 @@ impure fn parse_rest_import_name(parser p, ast.ident id) -> @ast.import_node {
identifiers += i;
}
p.bump();
ret @spanned(lo, hi, rec(identifiers = identifiers));
auto import_decl = ast.view_item_import(identifiers);
ret @spanned(lo, hi, import_decl);
}
impure fn parse_full_import_name(parser p) -> @ast.import_node {
impure fn parse_full_import_name(parser p) -> @ast.view_item {
alt (p.peek()) {
case (token.IDENT(?ident)) {
p.bump();
@@ -1699,7 +1701,7 @@ impure fn parse_full_import_name(parser p) -> @ast.import_node {
fail;
}
impure fn parse_import(parser p) -> @ast.import_node {
impure fn parse_import(parser p) -> @ast.view_item {
expect(p, token.IMPORT);
alt (p.peek()) {
case (token.IDENT(?ident)) {
@@ -1721,23 +1723,36 @@ impure fn parse_import(parser p) -> @ast.import_node {
fail;
}
impure fn parse_view(parser p) -> vec[ast.view_item] {
let vec[ast.view_item] items = vec();
while (true) {
alt (p.peek()) {
case (token.USE) {
items += vec(ast.view_item_use(parse_use(p)));
}
case (token.IMPORT) {
items += vec(ast.view_item_import(parse_import(p)));
}
case (_) {
ret items;
}
impure fn parse_use_or_import(parser p) -> @ast.view_item {
alt (p.peek()) {
case (token.USE) {
ret parse_use(p);
}
case (token.IMPORT) {
ret parse_import(p);
}
}
}
fn is_use_or_import(token.token t) -> bool {
if (t == token.USE) {
ret true;
}
if (t == token.IMPORT) {
ret true;
}
ret false;
}
impure fn parse_view(parser p) -> vec[@ast.view_item] {
let vec[@ast.view_item] items = vec();
while (is_use_or_import(p.peek())) {
auto item = parse_use_or_import(p);
items += vec(item);
}
ret items;
}
impure fn parse_crate_from_crate_file(parser p) -> @ast.crate {
auto lo = p.get_span();
auto hi = lo;