! { dg-do compile } ! PR 33269: we used to not simplify format strings before checking if ! they were valid, leading to a missed error. IMPLICIT CHARACTER*5 (h-z) CHARACTER*5 f CHARACTER*5 bad, good parameter(bad="a", good="(a)") PRINT ('a'), "hello" ! { dg-error "Missing leading left parenthesis in format string" } WRITE (*, ("a")) "error" ! { dg-error "Missing leading left parenthesis in format string" } PRINT 'a', "hello" ! { dg-error "Missing leading left parenthesis in format string" } WRITE (*, "a") "error" ! { dg-error "Missing leading left parenthesis in format string" } WRITE (*, bad) "error" ! { dg-error "Missing leading left parenthesis in format string" } PRINT 'a' // ', a', "err", "or" ! { dg-error "Missing leading left parenthesis in format string" } PRINT '(' // 'a' ! { dg-error "Unexpected end of format string in format string" } ! the following are ok PRINT "(2f5.3)", bar, foo PRINT ' (a)', "hello" WRITE (*, " ((a))") "hello" print "(a" // ")", "all is fine" print good, "great" ! verify that we haven't broken non-constant expressions f = "(f5.3)" print f, 3.14159 print (f), 2.71813 print implicitly_typed, "something" write (*, implicitly_typed_as_well) "something else" END