Better analysis for literals

2 files changed, 19 insertions, 1 deletions

diff --git a/src/syntax/ast.rs b/src/syntax/ast.rs
index 78d895ff..08def533 100644
--- a/src/syntax/ast.rs
+++ b/src/syntax/ast.rs
@@ -345,6 +345,20 @@ impl Expr {
             _ => false,
         }
     }
+
+    /// Is this a literal?
+    pub fn is_literal(&self) -> bool {
+        match self {
+            Self::None(_) => true,
+            Self::Auto(_) => true,
+            Self::Bool(_) => true,
+            Self::Int(_) => true,
+            Self::Float(_) => true,
+            Self::Numeric(_) => true,
+            Self::Str(_) => true,
+            _ => false,
+        }
+    }
 }
 
 impl Default for Expr {
diff --git a/src/syntax/lexer.rs b/src/syntax/lexer.rs
index cbddabb7..555ced84 100644
--- a/src/syntax/lexer.rs
+++ b/src/syntax/lexer.rs
@@ -499,7 +499,11 @@ impl Lexer<'_> {
 
         // Read the fractional part if not already done.
         // Make sure not to confuse a range for the decimal separator.
-        if c != '.' && !self.s.at("..") && self.s.eat_if('.') {
+        if c != '.'
+            && !self.s.at("..")
+            && !self.s.scout(1).map_or(false, is_id_start)
+            && self.s.eat_if('.')
+        {
             self.s.eat_while(char::is_ascii_digit);
         }