feat: undo

pkg/saccharine/scan.go

@@ -4,18 +4,18 @@ import "git.maximhutz.com/max/lambda/pkg/token"
 
 // scanner is the declarative lexer for the Saccharine language.
 var scanner = token.NewScanner[TokenType]().
-	On(`:=`, TokenAssign).
-	On(`\(`, TokenOpenParen).
-	On(`\)`, TokenCloseParen).
-	On(`\{`, TokenOpenBrace).
-	On(`\}`, TokenCloseBrace).
-	On(`;`, TokenHardBreak).
-	On(`\n`, TokenSoftBreak).
-	On(`\\`, TokenSlash).
-	On(`\.`, TokenDot).
-	On(`[a-zA-Z0-9_]+`, TokenAtom).
-	Skip(`#[^\n]*`).
-	Skip(`[^\S\n]+`)
+	On(`:=`, TokenAssign, 1).
+	On(`\(`, TokenOpenParen, 0).
+	On(`\)`, TokenCloseParen, 0).
+	On(`\{`, TokenOpenBrace, 0).
+	On(`\}`, TokenCloseBrace, 0).
+	On(`;`, TokenHardBreak, 0).
+	On(`\n`, TokenSoftBreak, 0).
+	On(`\\`, TokenSlash, 0).
+	On(`\.`, TokenDot, 0).
+	On(`[a-zA-Z0-9_]+`, TokenAtom, 0).
+	Skip(`#[^\n]*`, 0).
+	Skip(`[^\S\n]+`, 0)
 
 // scan tokenizes a string into Saccharine tokens.
 func scan(input string) ([]Token, error) {