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-rw-r--r--crates/syntax/src/ast/make.rs18
1 files changed, 12 insertions, 6 deletions
diff --git a/crates/syntax/src/ast/make.rs b/crates/syntax/src/ast/make.rs
index c6a7b99b7..94d4f2cf0 100644
--- a/crates/syntax/src/ast/make.rs
+++ b/crates/syntax/src/ast/make.rs
@@ -29,9 +29,13 @@ pub fn ty(text: &str) -> ast::Type {
29pub fn ty_unit() -> ast::Type { 29pub fn ty_unit() -> ast::Type {
30 ty("()") 30 ty("()")
31} 31}
32// FIXME: handle types of length == 1
33pub fn ty_tuple(types: impl IntoIterator<Item = ast::Type>) -> ast::Type { 32pub fn ty_tuple(types: impl IntoIterator<Item = ast::Type>) -> ast::Type {
34 let contents = types.into_iter().join(", "); 33 let mut count: usize = 0;
34 let mut contents = types.into_iter().inspect(|_| count += 1).join(", ");
35 if count == 1 {
36 contents.push(',');
37 }
38
35 ty(&format!("({})", contents)) 39 ty(&format!("({})", contents))
36} 40}
37// FIXME: handle path to type 41// FIXME: handle path to type
@@ -292,11 +296,13 @@ pub fn wildcard_pat() -> ast::WildcardPat {
292 296
293/// Creates a tuple of patterns from an iterator of patterns. 297/// Creates a tuple of patterns from an iterator of patterns.
294/// 298///
295/// Invariant: `pats` must be length > 1 299/// Invariant: `pats` must be length > 0
296///
297/// FIXME handle `pats` length == 1
298pub fn tuple_pat(pats: impl IntoIterator<Item = ast::Pat>) -> ast::TuplePat { 300pub fn tuple_pat(pats: impl IntoIterator<Item = ast::Pat>) -> ast::TuplePat {
299 let pats_str = pats.into_iter().map(|p| p.to_string()).join(", "); 301 let mut count: usize = 0;
302 let mut pats_str = pats.into_iter().inspect(|_| count += 1).join(", ");
303 if count == 1 {
304 pats_str.push(',');
305 }
300 return from_text(&format!("({})", pats_str)); 306 return from_text(&format!("({})", pats_str));
301 307
302 fn from_text(text: &str) -> ast::TuplePat { 308 fn from_text(text: &str) -> ast::TuplePat {