3 module List = ListLabels
6 let name = "an array type and an array variable" in
11 type arrtype = array of int \
20 let open Tiger.Parser in
22 TYPE; ID "arrtype"; EQ; ARRAY; OF; ID "int";
23 VAR; ID "arr1"; COLON; ID "arrtype"; ASSIGN;
24 ID "arrtype"; LBRACK; INT 10; RBRACK; OF; INT 0;
33 let name = "arr1 is valid since expression 0 is int = myint" in
39 type arrtype = array of myint \
48 let open Tiger.Parser in
50 TYPE; ID "myint"; EQ; ID "int";
51 TYPE; ID "arrtype"; EQ; ARRAY; OF; ID "myint";
52 VAR; ID "arr1"; COLON; ID "arrtype"; ASSIGN;
53 ID "arrtype"; LBRACK; INT 10; RBRACK; OF; INT 0;
62 let name = "a record type and a record variable" in
71 var rec1 : rectype := \
77 rec1.name := \"Somebody\"; \
83 let open Tiger.Parser in
85 TYPE; ID "rectype"; EQ;
86 LBRACE; ID "name"; COLON; ID "string";
87 COMMA; ID "age"; COLON; ID "int";
89 VAR; ID "rec1"; COLON; ID "rectype"; ASSIGN;
91 LBRACE; ID "name"; EQ; STRING "Nobody";
92 COMMA; ID "age"; EQ; INT 1000;
95 ID "rec1"; DOT; ID "name"; ASSIGN; STRING "Somebody"; SEMICOLON;
103 let name = "define a recursive function" in
110 function nfactor(n: int): int = \
113 else n * nfactor(n-1) \
121 let open Tiger.Parser in
123 FUNCTION; ID "nfactor"; LPAREN; ID "n"; COLON; ID "int"; RPAREN; COLON; ID "int"; EQ;
124 IF; ID "n"; EQ; INT 0;
126 ELSE; ID "n"; TIMES; ID "nfactor"; LPAREN; ID "n"; MINUS; INT 1; RPAREN;
128 ID "nfactor"; LPAREN; INT 10; RPAREN;
135 let name = "error : types of then - else differ" in
139 if (5>4) then 13 else \" \" \
143 let open Tiger.Parser in
144 [ IF; LPAREN; INT 5; GT; INT 4; RPAREN; THEN; INT 13; ELSE; STRING " "
147 (* TODO: Type error test case *)
159 let tokens_of_code code =
160 let lexbuf = Lexing.from_string code in
162 let token = Tiger.Lexer.token lexbuf in
163 (* Avoiding fragile pattern-matching *)
164 if token = Tiger.Parser.EOF then [] else token :: tokens ()
168 let parsetree_of_code code =
169 let lb = Lexing.from_string code in
170 (match Tiger.Parser.program Tiger.Lexer.token lb with
171 | exception Parsing.Parse_error ->
172 let module L = Lexing in
173 let L.({lex_curr_p = {pos_lnum=l; pos_bol=b; pos_cnum=c; _}; _}) = lb in
174 let msg = sprintf "Syntax error around line: %d, column: %d" l (c - b) in
180 let bar_sep = String.make 80 '-' in
181 let bar_end = String.make 80 '=' in
182 let indent n = String.make (2 * n) ' ' in
183 let color_on_green = "\027[0;32m" in
184 let color_on_red = "\027[1;31m" in
185 let color_off = "\027[0m" in
186 List.iteri tests ~f:(fun i (name, code, tokens_expected) ->
187 let i = i + 1 in (* Because iteri starts with 0 *)
188 printf "%s\n%sTest %d : %S\n" bar_sep (indent 0) i name;
190 printf "%sLexing : " (indent 1);
191 let tokens_emitted = tokens_of_code code in
193 assert (tokens_emitted = tokens_expected);
194 printf "%sOK%s\n" color_on_green color_off;
195 with Assert_failure _ ->
196 let tokens_to_string tokens =
197 String.concat "; " (List.map ~f:Tiger.Parser_token.to_string tokens)
200 "%sERROR%s\n%sExpected: %s\n%sEmitted : %s\n\n"
204 (tokens_to_string tokens_expected)
206 (tokens_to_string tokens_emitted)
209 printf "%sParsing: " (indent 1);
210 (match parsetree_of_code code with
211 | Error errmsg -> printf "%sERROR:%s %s\n" color_on_red color_off errmsg
212 | Ok parsetree -> printf "%sOK:%s %s\n" color_on_green color_off parsetree
216 print_endline bar_end;