+open Printf
+
module List = ListLabels
let test_01 =
"
in
let tokens =
- let open Tiger.Parser.Token in
+ let open Tiger.Parser in
[ LET;
TYPE; ID "arrtype"; EQ; ARRAY; OF; ID "int";
VAR; ID "arr1"; COLON; ID "arrtype"; ASSIGN;
"
in
let tokens =
- let open Tiger.Parser.Token in
+ let open Tiger.Parser in
[ LET;
TYPE; ID "myint"; EQ; ID "int";
TYPE; ID "arrtype"; EQ; ARRAY; OF; ID "myint";
"
in
let tokens =
- let open Tiger.Parser.Token in
+ let open Tiger.Parser in
[ LET;
TYPE; ID "rectype"; EQ;
LBRACE; ID "name"; COLON; ID "string";
"
in
let tokens =
- let open Tiger.Parser.Token in
+ let open Tiger.Parser in
[ LET;
FUNCTION; ID "nfactor"; LPAREN; ID "n"; COLON; ID "int"; RPAREN; COLON; ID "int"; EQ;
IF; ID "n"; EQ; INT 0;
let test_09 =
let name = "error : types of then - else differ" in
let code =
- "
- /* "^name^" */
-
- if (5>4) then 13 else \" \"
+ " \
+ /* "^name^" */ \
+ if (5>4) then 13 else \" \" \
"
in
let tokens =
- let open Tiger.Parser.Token in
+ let open Tiger.Parser in
[ IF; LPAREN; INT 5; GT; INT 4; RPAREN; THEN; INT 13; ELSE; STRING " "
]
in
let tokens_of_code code =
let lexbuf = Lexing.from_string code in
let rec tokens () =
- match Tiger.Lexer.token lexbuf with
- | None -> []
- | Some token -> token :: tokens ()
+ let token = Tiger.Lexer.token lexbuf in
+ (* Avoiding fragile pattern-matching *)
+ if token = Tiger.Parser.EOF then [] else token :: tokens ()
in
tokens ()
+let parsetree_of_code code =
+ let lb = Lexing.from_string code in
+ (match Tiger.Parser.program Tiger.Lexer.token lb with
+ | exception Parsing.Parse_error ->
+ let module L = Lexing in
+ let L.({lex_curr_p = {pos_lnum=l; pos_bol=b; pos_cnum=c; _}; _}) = lb in
+ let msg = sprintf "Syntax error around line: %d, column: %d" l (c - b) in
+ Error msg
+ | parsetree ->
+ Ok parsetree
+ )
+
let tests =
[ test_01
; test_02
let () =
let bar_sep = String.make 80 '-' in
let bar_end = String.make 80 '=' in
+ let indent n = String.make (2 * n) ' ' in
+ let color_on_green = "\027[0;32m" in
+ let color_on_red = "\027[1;31m" in
+ let color_off = "\027[0m" in
List.iteri tests ~f:(fun i (name, code, tokens_expected) ->
let i = i + 1 in (* Because iteri starts with 0 *)
- let open Printf in
- printf "%s\n Test %d : %S\n" bar_sep i name;
+ printf "%s\n%sTest %d : %S\n" bar_sep (indent 0) i name;
+
+ printf "%sLexing : " (indent 1);
let tokens_emitted = tokens_of_code code in
(try
assert (tokens_emitted = tokens_expected);
- print_endline " ---> OK";
+ printf "%sOK%s\n" color_on_green color_off;
with Assert_failure _ ->
let tokens_to_string tokens =
- String.concat "; " (List.map ~f:Tiger.Parser.Token.to_string tokens)
+ String.concat "; " (List.map ~f:Tiger.Parser_token.to_string tokens)
in
printf
- " ---> ERROR\n Expected: %s\n Emitted : %s\n\n"
+ "%sERROR%s\n%sExpected: %s\n%sEmitted : %s\n\n"
+ color_on_red
+ color_off
+ (indent 2)
(tokens_to_string tokens_expected)
+ (indent 2)
(tokens_to_string tokens_emitted)
);
+
+ printf "%sParsing: " (indent 1);
+ (match parsetree_of_code code with
+ | Error errmsg -> printf "%sERROR:%s %s\n" color_on_red color_off errmsg
+ | Ok parsetree -> printf "%sOK:%s %s\n" color_on_green color_off parsetree
+ );
+
);
print_endline bar_end;