failing scanner

test_scanner.c

@@ -0,0 +1,40 @@
+#include <assert.h>
+#include <criterion/criterion.h>
+#include "cig.h"
+
+Test(scanner, looks_like_float) {
+	const char *buffer =
+		"1.0 true\n"
+		"12.34 true\n"
+		"0.5 true\n"
+		"9.99 true\n"
+		"+1.2 true\n"
+		"-3.14 true\n"
+		"1 false\n"
+		"42 false\n"
+		"+7 false\n"
+		"1. false\n"
+		".5 false\n"
+		"+. false\n"
+		"abc false\n"
+		"+x false\n";
+	with_borrow(allocator) {
+		scanner_t scanner = make_scanner("test", buffer, allocator);
+		while (!scan_eof(&scanner)) {
+			bool actual = looks_like_float(&scanner);
+			while (*scanner.cur++ != ' ');
+			bool expect;
+			if (scan_literal(&scanner, "true")) {
+				expect = true;
+			} else if (scan_literal(&scanner, "false")) {
+				expect = false;
+			} else {
+				assert(false && "invalid expectation");
+			}
+			scan_whitespace(&scanner);
+			cr_assert_eq(actual, expect);
+
+		}
+	}
+
+}