/**
* @description
* the pair of the string to be matched later and the string that have been matched
+ * @var matched : have been matched
+ * @var remained : will be tested whether it'll be matched.
+ * @var matched_type (optional): the type of the matched string
*/
export interface MatcheePair {
- /** have been matched */
matched : string
- /** will be tested whether it'll be matched. */
remained : string
+ matched_type?: TokenType
+}
+
+/**
+ * The types of Token
+ * NL, // newline
+ *
+ * SP, // half-width space and tab
+ *
+ * ID, // identifier
+ *
+ * STR, // string
+ *
+ * OP, // operator or something like it
+ *
+ * FLO, // float num
+ *
+ * INT, // Integer
+ */
+export enum TokenType{
+ NL, // newlinw
+ SP, // half-width space and tab
+ ID, // identifier
+ STR, // string
+ OP, // operator
+ FLO, // float num
+ INT, // integer
+}
+
+/**
+ * tokenized token.
+ * @var text : the content text
+ * @var type (optional): the type of the token
+ * @var col : the column number
+ * @var ln : the line number
+ */
+export interface Token{
+ text: string,
+ type?: TokenType,
+ col: number,
+ ln: number,
}
/**
{ let wrapped_x = toSome(x);
let plusMinus = orDo(match1Char('+'), match1Char('-')); // ([+]|[-])
let d = matchRange('0','9'); // \d
- return thenDo(thenDo(thenDo(wrapped_x,
+ var result = thenDo(thenDo(thenDo(wrapped_x,
zeroOrOnceDo(plusMinus)),d),
zeroOrMoreDo(d));
+
+ if (result._tag == "Some"){
+ result.value.matched_type = TokenType.INT;
+ }
+ return result;
+ }
+ let space = (x : MatcheePair) =>{
+ let wrapped_x = toSome(x);
+ let s_aux = orDo(match1Char(' '), match1Char('\t')); // (" " | "\t")
+ var result = thenDo(thenDo(wrapped_x, s_aux), zeroOrMoreDo(s_aux));
+ if (result._tag == "Some"){
+ result.value.matched_type = TokenType.SP;
+ }
+ return result;
}
- console.log(input+", result: ");
- console.log(thenDo(input_matchee_pair, integer));
+ let newline = (x : MatcheePair) =>{
+ let wrapped_x = toSome(x);
+ // nl = \r?\n
+ let result = thenDo(thenDo(wrapped_x,
+ zeroOrOnceDo(match1Char('\r'))), match1Char('\n'));
+ if (result._tag == "Some"){
+ result.value.matched_type = TokenType.NL;
+ }
+ return result;
+ }
+
+ let term = (token_list : Array<Token>, x : Some<MatcheePair>)=>{
+ var ln = 1;
+ var col = 0;
+ var old_x = x;
+ let term_list = [newline, space, integer];
+ let term_aux = term_list.reduce((x,y)=> orDo(x,y));
+
+ var new_x : Maybe<MatcheePair> = thenDo(old_x, term_aux);
+ while (new_x._tag != "None"){
+ if (new_x.value.matched_type != TokenType.NL){
+ col += new_x.value.matched.length;
+ token_list.push({text : new_x.value.matched,
+ type: new_x.value.matched_type,
+ ln : ln,
+ col : col});
+
+ }
+ else{
+ col = 0;
+ ln += 1;
+
+ token_list.push({text : new_x.value.matched,
+ type: new_x.value.matched_type,
+ ln : ln,
+ col : col});
+
+ }
+
+
+ old_x = toSome({matched : "",
+ remained : new_x.value.remained});
+ new_x = thenDo(old_x, term_aux);
+ }
+
+ if (old_x.value.remained.length){
+ console.log(token_list);
+ throw new Error("the code can't be tokenized is near Ln. "+ln+", Col."+col
+ +", starting with "+ old_x.value.remained.substring(0,10));
+ }
+
+ return token_list;
+ }
+
+ console.log(term([], input_matchee_pair));
+
// TODO: id, string, space, basic operator, 3 marks: @, {, }.
}
-tokenize("+123");
-tokenize("123");
-tokenize("-123");
-tokenize(" 123");
-tokenize("c123");
+