From ca40ca93a55ffa08d3e699fc877e7e189b526c66 Mon Sep 17 00:00:00 2001
From: robojumper <robojumper@gmail.com>
Date: Fri, 5 Apr 2019 22:34:45 +0200
Subject: Parse and infer tuple indices

---
 crates/ra_syntax/src/validation/field_expr.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 crates/ra_syntax/src/validation/field_expr.rs

(limited to 'crates/ra_syntax/src/validation/field_expr.rs')

diff --git a/crates/ra_syntax/src/validation/field_expr.rs b/crates/ra_syntax/src/validation/field_expr.rs
new file mode 100644
index 000000000..2b405062e
--- /dev/null
+++ b/crates/ra_syntax/src/validation/field_expr.rs
@@ -0,0 +1,12 @@
+use crate::{ast::{self, FieldKind},
+            SyntaxError,
+            SyntaxErrorKind::*,
+};
+
+pub(crate) fn validate_field_expr_node(node: &ast::FieldExpr, errors: &mut Vec<SyntaxError>) {
+    if let Some(FieldKind::Index(idx)) = node.field_access() {
+        if idx.text().chars().any(|c| c < '0' || c > '9') {
+            errors.push(SyntaxError::new(InvalidTupleIndexFormat, idx.range()));
+        }
+    }
+}
-- 
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