Add some more string test cases

test/asm/invalid-format.asm

@@ -15,3 +15,4 @@ println STRFMT("%q16s", "hello")
 
 println STRFMT("%#d", 42)
 println STRFMT("%.5d", 42)
+println STRFMT("%q5d", 42)

test/asm/invalid-format.err

@@ -26,4 +26,6 @@ error: invalid-format.asm(16):
     Formatting type 'd' with exact flag '#'
 error: invalid-format.asm(17):
     Formatting type 'd' with fractional width
-error: Assembly aborted (14 errors)!
+error: invalid-format.asm(18):
+    Formatting type 'd' with fractional precision
+error: Assembly aborted (15 errors)!

test/asm/invalid-format.out

@@ -11,3 +11,4 @@ hello
 hello
 42
 42
+42

test/asm/invalid-utf-8-strings.asm

@@ -21,3 +21,17 @@ println "\"{invalid}\" == \"{copy}\" ({d:n})"
 DEF mid1 EQUS STRSUB("{invalid}", 5, 2)
 DEF mid2 EQUS STRSUB("{invalid}", 9, 1)
 println "\"{mid2}{mid1}\""
+
+; characters:
+; 1: U+0041 A
+; 2: U+0020 space
+; 3: invalid byte 0xFE
+; 4: invalid byte 0x81
+; 5: invalid byte 0xFF
+; 6: U+0020 space
+; 7: U+0042 B
+REDEF invalid EQUS "A <20><><EFBFBD> B"
+
+DEF n = strlen("{invalid}")
+DEF r = charlen("{invalid}")
+println "\"{#s:invalid}\": {d:n} != {d:r}"

test/asm/invalid-utf-8-strings.err

@@ -42,4 +42,12 @@ error: invalid-utf-8-strings.asm(22):
     STRSUB: Invalid UTF-8 byte 0xA3
 error: invalid-utf-8-strings.asm(22):
     STRSUB: Invalid UTF-8 byte 0xA4
-error: Assembly aborted (22 errors)!
+error: invalid-utf-8-strings.asm(35):
+    STRLEN: Invalid UTF-8 byte 0xFE
+error: invalid-utf-8-strings.asm(35):
+    STRLEN: Invalid UTF-8 byte 0x81
+error: invalid-utf-8-strings.asm(35):
+    STRLEN: Invalid UTF-8 byte 0xFF
+error: invalid-utf-8-strings.asm(36):
+    Input string is not valid UTF-8
+error: Assembly aborted (26 errors)!

test/asm/invalid-utf-8-strings.out

@@ -1,2 +1,3 @@
 "aäb漢,a<><61>b<EFBFBD><62><EFBFBD>!" == "aäb漢,a<><61>b<EFBFBD><62><EFBFBD>!" (12)
 "b,a"
+"A <20><><EFBFBD> B": 7 != 2

test/asm/string-formatting.asm

@@ -4,11 +4,13 @@ def f equ -123.0456
 def pi equ 3.14159
 def s equs "hello"
 def t equs "\"\\t\" is '\t'"
+def u equs "\t\r\0\n"
 
 	println "<{ -6d:n}> <{+06u:n}> <{5x:n}> <{#16b:n}>"
 	println "<{u:m}> <{+3d:m}> <{#016o:m}>"
 	println "<{f:pi}> <{06.f:f}> <{.10f:f}>"
 	println "\"{#-20s:t}\", \"{#20s:t}\", \"{20s:t}\""
+	println "{#s:u}"
 
 macro foo
 	println "\1 <{\1}>"

test/asm/string-formatting.out

@@ -2,4 +2,5 @@
 <4294967254> <-42> <&000037777777726>
 <3.14159> <-00123> <-123.0455932617>
 "\"\\t\" is '\t'     ", "     \"\\t\" is '\t'", "         "\t" is '	'"
+\t\r\0\n
 -6d:n <300   >