1 files changed, 20 insertions, 0 deletions

diff --git a/src/parser/grammar/expressions.rs b/src/parser/grammar/expressions.rs
new file mode 100644
index 000000000..8caaf3553
--- /dev/null
+++ b/src/parser/grammar/expressions.rs
@@ -0,0 +1,20 @@
+use super::*;
+
+pub(super) fn literal(p: &mut Parser) -> bool {
+    match p.current() {
+        TRUE_KW | FALSE_KW | INT_NUMBER | FLOAT_NUMBER | BYTE | CHAR | STRING | RAW_STRING
+        | BYTE_STRING | RAW_BYTE_STRING => {
+            let lit = p.start();
+            p.bump();
+            lit.complete(p, LITERAL);
+            true
+        }
+        _ => false,
+    }
+}
+
+pub(super) fn expr(p: &mut Parser) {
+    if !literal(p) {
+        p.error().message("expected expression").emit();
+    }
+}