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Parse local item decls.

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This commit is contained in:
Graydon Hoare 2010-12-31 14:33:49 -08:00
parent 53d5b11208
commit b42f49bf99
1 changed files with 36 additions and 6 deletions
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42
src/comp/front/parser.rs
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@ -1067,12 +1067,20 @@ impure fn parse_stmt(parser p) -> @ast.stmt {
}
// Remainder are line-expr stmts.
case (_) {
auto e = parse_expr(p);
auto hi = p.get_span();
ret @spanned(lo, hi, ast.stmt_expr(e));
if (peeking_at_item(p)) {
// Might be a local item decl.
auto i = parse_item(p);
auto hi = i.span;
auto decl = @spanned(lo, hi, ast.decl_item(i));
ret @spanned(lo, hi, ast.stmt_decl(decl));
} else {
// Remainder are line-expr stmts.
auto e = parse_expr(p);
auto hi = p.get_span();
ret @spanned(lo, hi, ast.stmt_expr(e));
}
}
}
p.err("expected statement");
@ -1147,7 +1155,12 @@ fn stmt_to_expr(@ast.stmt stmt) -> option.t[@ast.expr] {
fn stmt_ends_with_semi(@ast.stmt stmt) -> bool {
alt (stmt.node) {
case (ast.stmt_decl(_)) { ret true; } // FIXME
case (ast.stmt_decl(?d)) {
alt (d.node) {
case (ast.decl_local(_)) { ret true; }
case (ast.decl_item(_)) { ret false; }
}
}
case (ast.stmt_ret(_)) { ret true; }
case (ast.stmt_log(_)) { ret true; }
case (ast.stmt_check_expr(_)) { ret true; }
@ -1500,6 +1513,23 @@ impure fn parse_effect(parser p) -> ast.effect {
fail;
}
fn peeking_at_item(parser p) -> bool {
alt (p.peek()) {
case (token.STATE) { ret true; }
case (token.GC) { ret true; }
case (token.IMPURE) { ret true; }
case (token.UNSAFE) { ret true; }
case (token.CONST) { ret true; }
case (token.FN) { ret true; }
case (token.MOD) { ret true; }
case (token.TYPE) { ret true; }
case (token.TAG) { ret true; }
case (token.OBJ) { ret true; }
case (_) { ret false; }
}
ret false;
}
impure fn parse_item(parser p) -> @ast.item {
let ast.effect eff = parse_effect(p);
let ast.layer lyr = parse_layer(p);