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| var assert = require("chai").assert;
var RegExpLexer = require("../dist/regexp-lexer-cjs-es5");
var XRegExp = require("@gerhobbelt/xregexp");
var yaml = require('@gerhobbelt/js-yaml');
var JSON5 = require('@gerhobbelt/json5');
var globby = require('globby');
var fs = require('fs');
function re2set(re) {
var xr = new XRegExp(re);
var xs = '' + xr;
return xs.substr(2, xs.length - 4); // strip off the wrapping: /[...]/
}
describe("Lexer Kernel", function () {
it("test basic matchers", function() {
var dict = {
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input = "xxyx";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "EOF");
});
// Before we go and test the API any further, we must make sure
// the used lex grammar parser delivers as expected:
describe("Parsed Lexer Grammar", function () {
it("parses special character escapes correctly", function () {
var dict = [
"%%",
"'x' {return 'X';}",
"\\n {return 'NL';}",
"\\r {return 'R';}",
"\\v {return 'V';}",
"\\a {return 'A';}",
"\\f {return 'F';}",
"\\b {return 'B';}",
"\\x42 {return 'C';}",
"\\u0043 {return 'D';}",
"\\ {return 'E';}",
"[^] {return this.ERROR;}",
].join('\n');
var lexer = new RegExpLexer(dict);
var JisonLexerError = lexer.JisonLexerError;
assert(JisonLexerError);
var input = "x\nx\rx\vx\ax\fx\bx\x42x\u0043x xxx\\nx\\rx\\vx\\ax\\fx\\bx\\x42x\\u0043x\\ ";
// help us monitor/debug lexer output:
var old_lex_f = lexer.lex;
lexer.lex = function () {
try {
var rv = old_lex_f.call(this);
return rv;
} catch (ex) {
//console.error("lex() ERROR EX:", ex.message, ex.stack);
throw ex;
}
};
lexer.setInput(input);
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'NL');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'R');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'V');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'A');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'F');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), lexer.ERROR); // `\b` is a regex edge marker special, not string value '\b'!
assert.equal(lexer.lex(), 'X');
// As the `\b` rule comes before the 'C' rule, it will match at the start-of-word boundary...
assert.equal(lexer.lex(), 'B');
// ...and since this lexer rule doesn't consume anything at all, it will match indefinitely...
for (var cnt = 42; cnt > 0; cnt--) {
assert.equal(lexer.lex(), 'B');
}
// ...until we manually NUKE that rule:
for (var i = 0, len = lexer.rules.length; i < len; i++) {
// find the lexer rule which matches the word boundary:
if (lexer.rules[i].test('k') && String(lexer.rules[i]).indexOf('\\b') >= 0) {
lexer.rules[i] = /MMMMMMMMM/;
}
}
// and verify that our lexer decompression/ruleset-caching results
// in the above action not having any effect until we NUKE the
// same regex in the condition cache:
for (var cnt = 42; cnt > 0; cnt--) {
assert.equal(lexer.lex(), 'B');
}
var cond_rules = lexer.__currentRuleSet__.__rule_regexes;
for (var i = 0, len = cond_rules.length; i < len; i++) {
// find the lexer rule which matches the word boundary:
if (cond_rules[i] && cond_rules[i].test('k') && String(cond_rules[i]).indexOf('\\b') >= 0) {
cond_rules[i] = /MMMMMMMMM/;
}
}
// **POSTSCRIPT**
//
// Regrettably I don't know of a way to check for this type of lexer regex rule
// anomaly in a generic way: the lexer rule may be a compound one, hiding the
// non-consuming `\b` in there, while there are other regex constructs
// imaginable which share the same problem with this `\b` lexer rule: a rexexp
// match which matches a boundary, hence **an empty string** without the
// grammar designer **intentionally** doing this.
assert.equal(lexer.lex(), 'C');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'D');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'E');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'X');
// \\n
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \\r
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \\v
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \\a
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'A');
assert.equal(lexer.lex(), 'X');
// \\f
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \\b
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \\x42
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \\u0043
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \\_
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'E');
assert.equal(lexer.lex(), lexer.EOF);
});
it("parses literal rule strings with escapes correctly", function () {
var dict = [
"%%",
"'x' {return 'X';}",
"'\\n' {return 'SN';}",
"'\\r' {return 'SR';}",
"'\\v' {return 'SV';}",
"'\\a' {return 'SA';}",
"'\\f' {return 'SF';}",
"'\\b' {return 'SB';}",
"'\\x42' {return 'SC';}",
"'\\u0043' {return 'SD';}",
"'\\ ' {return 'SE';}",
"[^] {return this.ERROR;}",
].join('\n');
var lexer = new RegExpLexer(dict);
var JisonLexerError = lexer.JisonLexerError;
assert(JisonLexerError);
var input = "x\nx\rx\vx\ax\fx\bx\x42x\u0043x xxx\\nx\\rx\\vx\\ax\\fx\\bx\\x42x\\u0043x\\ ";
// help us monitor/debug lexer output:
var old_lex_f = lexer.lex;
lexer.lex = function () {
try {
var rv = old_lex_f.call(this);
return rv;
} catch (ex) {
//console.error("lex() ERROR EX:", ex.message, ex.stack);
throw ex;
}
};
lexer.setInput(input);
assert.equal(lexer.lex(), 'X');
// \n
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \r
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \v
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \a
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \f
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \b
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \x42
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
// \u0043
assert.equal(lexer.lex(), 'SD');
assert.equal(lexer.lex(), 'X');
// \_
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'SN');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'SR');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'SV');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'SA');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'SF');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'SB');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'SC');
assert.equal(lexer.lex(), 'X');
// \\u0043
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'SE');
assert.equal(lexer.lex(), lexer.EOF);
});
});
it("lexer comes with its own JisonLexerError exception/error class", function () {
var dict = [
"%%",
"'x' {return 'X';}",
].join('\n');
var lexer = new RegExpLexer(dict);
var JisonLexerError = lexer.JisonLexerError;
assert(JisonLexerError);
var t = new JisonLexerError('test', 42);
assert(t instanceof Error);
assert(t instanceof JisonLexerError);
assert(t.hash === 42);
assert(t.message === 'test');
assert(t.toString() === 'JisonLexerError: test');
var t2 = new Error('a');
var t3 = new JisonLexerError('test', { exception: t2 });
assert(t2 instanceof Error);
assert(!(t2 instanceof JisonLexerError));
assert(t3 instanceof Error);
assert(t3 instanceof JisonLexerError);
assert(!t2.hash);
assert(t3.hash);
assert(t3.hash.exception);
assert(t2.message === 'a');
assert(t3.message === 'a');
assert(t2.toString() === 'Error: a');
assert(t3.toString() === 'JisonLexerError: a');
});
it("lexer errors are thrown using its own JisonLexerError exception/error class", function () {
var dict = [
"%%",
"'x' {return 'X';}",
].join('\n');
var lexer = new RegExpLexer(dict);
var JisonLexerError = lexer.JisonLexerError;
assert(JisonLexerError);
var input = "xxyx";
lexer.setInput(input);
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'X');
var ex1 = null;
try {
lexer.lex();
assert(false, "should never get here!");
} catch (ex) {
assert(ex instanceof Error);
assert(ex instanceof JisonLexerError);
assert(/JisonLexerError:[^]*?Unrecognized text\./.test(ex));
assert(ex.hash);
assert.equal(typeof ex.hash.errStr, 'string');
assert.equal(typeof ex.message, 'string');
ex1 = ex;
}
// since the lexer has been using the standard parseError method,
// which throws an exception **AND DOES NOT MOVE THE READ CURSOR FORWARD**,
// we WILL observe the same error again on the next invocation:
try {
lexer.lex();
assert(false, "should never get here!");
} catch (ex) {
assert(ex instanceof Error);
assert(ex instanceof JisonLexerError);
assert(/JisonLexerError:[^]*?Unrecognized text\./.test(ex));
assert(ex.hash);
assert.equal(typeof ex.hash.errStr, 'string');
assert.equal(typeof ex.message, 'string');
assert.strictEqual(ex.message, ex1.message);
var check_items = ['text', 'line', 'loc', 'errStr'];
check_items.forEach(function (item) {
assert.deepEqual(ex[item], ex1[item], "both exceptions should have a matching member '" + item + "'");
});
}
// however, when we apply a non-throwing parseError, we MUST shift one character
// forward on error:
lexer.parseError = function (str, hash) {
assert(hash);
assert(str);
// and make sure the `this` reference points right back at the current *lexer* instance!
assert.equal(this, lexer);
};
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(lexer.yytext, "y"); // the one character shifted on error should end up in the lexer "value", i.e. `yytext`!
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.yytext, "x");
assert.equal(lexer.lex(), lexer.EOF);
});
it("lexer run-time errors include a display of the erroneous input context", function () {
var dict = [
"%%",
"'x' {return 'X';}",
"\\n {return 'NL';}",
].join('\n');
var lexer = new RegExpLexer(dict);
var JisonLexerError = lexer.JisonLexerError;
assert(JisonLexerError);
var input = "x\nx\nxyzx\nx\ny\nz";
// help us monitor/debug lexer output:
var old_lex_f = lexer.lex;
lexer.lex = function () {
try {
var rv = old_lex_f.call(this);
return rv;
} catch (ex) {
//console.error("lex() ERROR EX:", ex.message, ex.stack);
throw ex;
}
};
lexer.setInput(input);
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'NL');
assert.equal(lexer.lex(), 'X');
var lastErrorMsg;
var lastErrorHash;
lexer.parseError = function (str, hash) {
assert(hash);
assert(str);
// and make sure the `this` reference points right back at the current *lexer* instance!
assert.equal(this, lexer);
lastErrorHash = hash;
lastErrorMsg = str;
//hash.lexer = null; // nuke the lexer class in `yy` to keep the debug output leaner and cleaner
//console.error("error: fix?", {
// str,
// hash,
// matched: this.matched,
// match: this.match,
// matches: this.matches,
// yytext: this.yytext
//});
// consume at least one character of input as if everything was hunky-dory:
Eif (!this.matches) {
assert.strictEqual(this.yytext, '');
this.input();
assert.ok(this.yytext.length > 0);
} else {
assert.ok(this.yytext.length > 0);
}
return 'FIX_' + String(this.yytext).toUpperCase();
};
assert.equal(lexer.lex(), 'NL');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'FIX_Y');
assert.equal(lexer.lex(), 'FIX_Z');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'NL');
assert.equal(lexer.lex(), 'X');
assert.equal(lexer.lex(), 'NL');
assert.equal(lexer.lex(), 'FIX_Y');
assert.equal(lexer.lex(), 'NL');
assert.equal(lexer.lex(), 'FIX_Z');
assert.equal(lexer.lex(), lexer.EOF);
});
it("test set yy", function() {
var dict = {
rules: [
["x", "return yy.x;" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input = "xxyx";
var lexer = new RegExpLexer(dict);
lexer.setInput(input, { x: 'EX' });
assert.equal(lexer.lex(), 'EX');
assert.equal(lexer.lex(), 'EX');
assert.equal(lexer.lex(), 'Y');
assert.equal(lexer.lex(), 'EX');
assert.equal(lexer.lex(), 'EOF');
});
it("test set input after", function() {
var dict = {
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input = "xxyx";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "EOF");
});
it("test unrecognized char", function() {
var dict = {
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input = "xa";
var lexer = new RegExpLexer(dict, input);
var JisonLexerError = lexer.JisonLexerError;
assert(JisonLexerError);
assert.equal(lexer.lex(), "X");
assert.throws(function () {
lexer.lex();
},
JisonLexerError,
/Lexical error on line \d+[^]*?Unrecognized text/, "bad char"
);
});
it("test if lexer continues correctly after having encountered an unrecognized char", function() {
var dict = {
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input = "xa";
var err = 0;
var lexer = new RegExpLexer(dict, input);
lexer.parseError = function (str) {
err++;
};
assert.equal(lexer.lex(), "X");
assert.equal(err, 0);
assert.equal(lexer.lex(), lexer.ERROR /* 2 */);
assert.equal(err, 1);
assert.equal(lexer.lex(), "EOF");
});
it("test macro", function() {
var dict = {
macros: {
"digit": "[0-9]"
},
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["{digit}+", "return 'NAT';" ],
["$", "return 'EOF';" ]
]
};
var input = "x12234y42";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "NAT");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "NAT");
assert.equal(lexer.lex(), "EOF");
});
it("test macro precedence", function() {
var dict = {
macros: {
"hex": "[0-9]|[a-f]"
},
rules: [
["-", "return '-';" ],
["{hex}+", "return 'HEX';" ],
["$", "return 'EOF';" ]
]
};
var input = "129-abfe-42dc-ea12";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "HEX");
assert.equal(lexer.lex(), "-");
assert.equal(lexer.lex(), "HEX");
assert.equal(lexer.lex(), "-");
assert.equal(lexer.lex(), "HEX");
assert.equal(lexer.lex(), "-");
assert.equal(lexer.lex(), "HEX");
assert.equal(lexer.lex(), "EOF");
});
it("test nested macros", function () {
var dict = {
macros: {
"digit": "[0-9]",
"2digit": "{digit}{digit}",
"3digit": "{2digit}{digit}"
},
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["{3digit}", "return 'NNN';" ],
["{2digit}", "return 'NN';" ],
["{digit}", "return 'N';" ],
["$", "return 'EOF';" ]
]
};
var input = "x1y42y123";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "N");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "NN");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "NNN");
assert.equal(lexer.lex(), "EOF");
});
it("test nested macro precedence", function() {
var dict = {
macros: {
"hex": "[0-9]|[a-f]",
"col": "#{hex}+"
},
rules: [
["-", "return '-';" ],
["{col}", "return 'HEX';" ],
["$", "return 'EOF';" ]
]
};
var input = "#129-#abfe-#42dc-#ea12";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "HEX");
assert.equal(lexer.lex(), "-");
assert.equal(lexer.lex(), "HEX");
assert.equal(lexer.lex(), "-");
assert.equal(lexer.lex(), "HEX");
assert.equal(lexer.lex(), "-");
assert.equal(lexer.lex(), "HEX");
assert.equal(lexer.lex(), "EOF");
});
it("test action include", function() {
var dict = {
rules: [
["x", "return included ? 'Y' : 'N';" ],
["$", "return 'EOF';" ]
],
actionInclude: "var included = true;"
};
var input = "x";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "EOF");
});
it("test ignored", function() {
var dict = {
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["\\s+", "/* skip whitespace */" ],
["$", "return 'EOF';" ]
]
};
var input = "x x y x";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "EOF");
});
it("test disambiguate", function() {
var dict = {
rules: [
["for\\b", "return 'FOR';" ],
["if\\b", "return 'IF';" ],
["[a-z]+", "return 'IDENTIFIER';" ],
["\\s+", "/* skip whitespace */" ],
["$", "return 'EOF';" ]
]
};
var input = "if forever for for";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "IF");
assert.equal(lexer.lex(), "IDENTIFIER");
assert.equal(lexer.lex(), "FOR");
assert.equal(lexer.lex(), "FOR");
assert.equal(lexer.lex(), "EOF");
});
it("test yytext overwrite", function() {
var dict = {
rules: [
["x", "yytext = 'hi der'; return 'X';" ]
]
};
var input = "x";
var lexer = new RegExpLexer(dict, input);
lexer.lex();
assert.equal(lexer.yytext, "hi der");
});
it("test yylineno with test_match", function() {
var dict = {
rules: [
["\\s+", "/* skip whitespace */" ],
["x", "return 'x';" ],
["y", "return 'y';" ]
]
};
var input = "x\nxy\n\n\nx";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.yylineno, 0);
assert.equal(lexer.lex(), "x");
assert.equal(lexer.lex(), "x");
assert.equal(lexer.yylineno, 1);
assert.equal(lexer.lex(), "y");
assert.equal(lexer.yylineno, 1);
assert.equal(lexer.lex(), "x");
assert.equal(lexer.yylineno, 4);
});
it("test yylineno with input", function() {
var dict = {
rules: [
["\\s+", "/* skip whitespace */" ],
["x", "return 'x';" ],
["y", "return 'y';" ]
]
};
// windows style
var input = "a\r\nb";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.yylineno, 0);
assert.equal(lexer.input(), "a");
assert.equal(lexer.input(), "\r\n");
assert.equal(lexer.yylineno, 1);
assert.equal(lexer.input(), "b");
assert.equal(lexer.yylineno, 1);
// linux style
var input = "a\nb";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.yylineno, 0);
assert.equal(lexer.input(), "a");
assert.equal(lexer.input(), "\n");
assert.equal(lexer.yylineno, 1);
assert.equal(lexer.input(), "b");
assert.equal(lexer.yylineno, 1);
// mac style
var input = "a\rb";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.yylineno, 0);
assert.equal(lexer.input(), "a");
assert.equal(lexer.input(), "\r");
assert.equal(lexer.yylineno, 1);
assert.equal(lexer.input(), "b");
assert.equal(lexer.yylineno, 1);
});
it("test yylloc, yyleng, and other lexer token parameters", function() {
var dict = {
rules: [
["\\s+", "/* skip whitespace */" ],
["x+", "return 'x';" ],
["y+", "return 'y';" ]
]
};
var input = "x\nxy\n\n\nx\nyyyy";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "x");
assert.equal(lexer.yytext, "x", "yytext");
assert.equal(lexer.yyleng, 1, "yyleng");
assert.equal(lexer.offset, 1, "offset");
assert.equal(lexer.match, "x", "match");
assert.equal(lexer.matched, "x", "matched");
assert.equal(lexer.yylloc.first_line, 1);
assert.equal(lexer.yylloc.last_line, 1);
assert.equal(lexer.yylloc.first_column, 0);
assert.equal(lexer.yylloc.last_column, 1);
//assert.ok(lexer.yylloc.range === undefined);
assert.equal(lexer.lex(), "x");
assert.equal(lexer.yytext, "x", "yytext");
assert.equal(lexer.yyleng, 1, "yyleng");
assert.equal(lexer.offset, 3, "offset");
assert.equal(lexer.match, "x", "match");
assert.equal(lexer.matched, "x\nx", "matched");
assert.equal(lexer.yylloc.first_line, 2);
assert.equal(lexer.yylloc.last_line, 2);
assert.equal(lexer.yylloc.first_column, 0);
assert.equal(lexer.yylloc.last_column, 1);
assert.equal(lexer.lex(), "y");
assert.equal(lexer.yytext, "y", "yytext");
assert.equal(lexer.yyleng, 1, "yyleng");
assert.equal(lexer.offset, 4, "offset");
assert.equal(lexer.match, "y", "match");
assert.equal(lexer.matched, "x\nxy", "matched");
assert.equal(lexer.yylloc.first_line, 2);
assert.equal(lexer.yylloc.last_line, 2);
assert.equal(lexer.yylloc.first_column, 1);
assert.equal(lexer.yylloc.last_column, 2);
assert.equal(lexer.lex(), "x");
assert.equal(lexer.yytext, "x", "yytext");
assert.equal(lexer.yyleng, 1, "yyleng");
assert.equal(lexer.offset, 8, "offset");
assert.equal(lexer.match, "x", "match");
assert.equal(lexer.matched, "x\nxy\n\n\nx", "matched");
assert.equal(lexer.yylloc.first_line, 5);
assert.equal(lexer.yylloc.last_line, 5);
assert.equal(lexer.yylloc.first_column, 0);
assert.equal(lexer.yylloc.last_column, 1);
assert.equal(lexer.lex(), "y");
assert.equal(lexer.yytext, "yyyy", "yytext");
assert.equal(lexer.yyleng, 4, "yyleng");
assert.equal(lexer.offset, 13, "offset");
assert.equal(lexer.match, "yyyy", "match");
assert.equal(lexer.matched, "x\nxy\n\n\nx\nyyyy", "matched");
assert.equal(lexer.yylloc.first_line, 6);
assert.equal(lexer.yylloc.last_line, 6);
assert.equal(lexer.yylloc.first_column, 0);
assert.equal(lexer.yylloc.last_column, 4);
});
it("test yylloc with %options ranges", function() {
var dict = {
options: {
ranges: true
},
rules: [
["\\s+", "/* skip whitespace */" ],
["x+", "return 'x';" ],
["y+", "return 'y';" ]
]
};
var input = "x\nxy\n\n\nx\nyyyy";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "x");
assert.equal(lexer.yytext, "x", "yytext");
assert.equal(lexer.yyleng, 1, "yyleng");
assert.equal(lexer.offset, 1, "offset");
assert.equal(lexer.match, "x", "match");
assert.equal(lexer.matched, "x", "matched");
assert.equal(lexer.yylloc.first_line, 1);
assert.equal(lexer.yylloc.last_line, 1);
assert.equal(lexer.yylloc.first_column, 0);
assert.equal(lexer.yylloc.last_column, 1);
assert.ok(lexer.yylloc.range != null);
assert.equal(lexer.yylloc.range[0], 0);
assert.equal(lexer.yylloc.range[1], 1);
assert.equal(lexer.lex(), "x");
assert.equal(lexer.yytext, "x", "yytext");
assert.equal(lexer.yyleng, 1, "yyleng");
assert.equal(lexer.offset, 3, "offset");
assert.equal(lexer.match, "x", "match");
assert.equal(lexer.matched, "x\nx", "matched");
assert.equal(lexer.yylloc.first_line, 2);
assert.equal(lexer.yylloc.last_line, 2);
assert.equal(lexer.yylloc.first_column, 0);
assert.equal(lexer.yylloc.last_column, 1);
assert.equal(lexer.yylloc.range[0], 2);
assert.equal(lexer.yylloc.range[1], 3);
assert.equal(lexer.lex(), "y");
assert.equal(lexer.yytext, "y", "yytext");
assert.equal(lexer.yyleng, 1, "yyleng");
assert.equal(lexer.offset, 4, "offset");
assert.equal(lexer.match, "y", "match");
assert.equal(lexer.matched, "x\nxy", "matched");
assert.equal(lexer.yylloc.first_line, 2);
assert.equal(lexer.yylloc.last_line, 2);
assert.equal(lexer.yylloc.first_column, 1);
assert.equal(lexer.yylloc.last_column, 2);
assert.equal(lexer.yylloc.range[0], 3);
assert.equal(lexer.yylloc.range[1], 4);
assert.equal(lexer.lex(), "x");
assert.equal(lexer.yytext, "x", "yytext");
assert.equal(lexer.yyleng, 1, "yyleng");
assert.equal(lexer.offset, 8, "offset");
assert.equal(lexer.match, "x", "match");
assert.equal(lexer.matched, "x\nxy\n\n\nx", "matched");
assert.equal(lexer.yylloc.first_line, 5);
assert.equal(lexer.yylloc.last_line, 5);
assert.equal(lexer.yylloc.first_column, 0);
assert.equal(lexer.yylloc.last_column, 1);
assert.equal(lexer.yylloc.range[0], 7);
assert.equal(lexer.yylloc.range[1], 8);
assert.equal(lexer.lex(), "y");
assert.equal(lexer.yytext, "yyyy", "yytext");
assert.equal(lexer.yyleng, 4, "yyleng");
assert.equal(lexer.offset, 13, "offset");
assert.equal(lexer.match, "yyyy", "match");
assert.equal(lexer.matched, "x\nxy\n\n\nx\nyyyy", "matched");
assert.equal(lexer.yylloc.first_line, 6);
assert.equal(lexer.yylloc.last_line, 6);
assert.equal(lexer.yylloc.first_column, 0);
assert.equal(lexer.yylloc.last_column, 4);
assert.equal(lexer.yylloc.range[0], 9);
assert.equal(lexer.yylloc.range[1], 13);
});
it("test more()", function() {
var dict = {
rules: [
["x", "return 'X';" ],
['"[^"]*',
/* istanbul ignore next: action code is injected and then crashes the generated parser due to unreachable coverage global */
function () {
if (yytext.charAt(yyleng - 1) === '\\') {
this.more();
} else {
yytext += this.input(); // swallow end quote
return "STRING";
}
}
],
["$", "return 'EOF';" ]
]
};
var input = 'x"fgjdrtj\\"sdfsdf"x';
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "STRING");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "EOF");
});
it("test defined token returns", function() {
var tokens = {"2":"X", "3":"Y", "4":"EOF"};
var dict = {
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input = "xxyx";
var lexer = new RegExpLexer(dict, input, tokens);
assert.equal(lexer.lex(), 2);
assert.equal(lexer.lex(), 2);
assert.equal(lexer.lex(), 3);
assert.equal(lexer.lex(), 2);
assert.equal(lexer.lex(), 4);
});
it("test module generator from constructor", function() {
var dict = {
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input = "xxyx";
var lexerSource = RegExpLexer.generate(dict);
eval(lexerSource);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "EOF");
});
it("test module generator", function() {
var dict = {
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input = "xxyx";
var lexer_ = new RegExpLexer(dict);
var lexerSource = lexer_.generateModule();
eval(lexerSource);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "EOF");
});
it("test generator with more complex lexer", function() {
var dict = {
rules: [
["x", "return 'X';" ],
['"[^"]*', function () {
if (yytext.charAt(yyleng - 1) === '\\') {
this.more();
} else {
yytext += this.input(); // swallow end quote
return "STRING";
}
} ],
["$", "return 'EOF';" ]
]
};
var input = 'x"fgjdrtj\\"sdfsdf"x';
var lexer_ = new RegExpLexer(dict);
var lexerSource = lexer_.generateModule();
eval(lexerSource);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "STRING");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "EOF");
});
it("test commonjs module generator", function() {
var dict = {
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input = "xxyx";
var lexer_ = new RegExpLexer(dict);
var lexerSource = lexer_.generateCommonJSModule();
var exports = {};
eval(lexerSource);
exports.lexer.setInput(input);
assert.equal(exports.lex(), "X");
assert.equal(exports.lex(), "X");
assert.equal(exports.lex(), "Y");
assert.equal(exports.lex(), "X");
assert.equal(exports.lex(), "EOF");
});
it("test amd module generator", function() {
var dict = {
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input = "xxyx";
var lexer_ = new RegExpLexer(dict);
var lexerSource = lexer_.generateAMDModule();
var lexer;
var define = function (_, fn) {
lexer = fn();
};
eval(lexerSource);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "EOF");
});
it("test DJ lexer", function() {
var dict = {
"lex": {
"macros": {
"digit": "[0-9]",
"id": "[a-zA-Z_][a-zA-Z0-9_]*"
},
"rules": [
["\\/\\/.*", "/* ignore comment */"],
["main\\b", "return 'MAIN';"],
["class\\b", "return 'CLASS';"],
["extends\\b", "return 'EXTENDS';"],
["nat\\b", "return 'NATTYPE';"],
["if\\b", "return 'IF';"],
["else\\b", "return 'ELSE';"],
["for\\b", "return 'FOR';"],
["printNat\\b", "return 'PRINTNAT';"],
["readNat\\b", "return 'READNAT';"],
["this\\b", "return 'THIS';"],
["new\\b", "return 'NEW';"],
["var\\b", "return 'VAR';"],
["null\\b", "return 'NUL';"],
["{digit}+", "return 'NATLITERAL';"],
["{id}", "return 'ID';"],
["==", "return 'EQUALITY';"],
["=", "return 'ASSIGN';"],
["\\+", "return 'PLUS';"],
["-", "return 'MINUS';"],
["\\*", "return 'TIMES';"],
[">", "return 'GREATER';"],
["\\|\\|", "return 'OR';"],
["!", "return 'NOT';"],
["\\.", "return 'DOT';"],
["\\{", "return 'LBRACE';"],
["\\}", "return 'RBRACE';"],
["\\(", "return 'LPAREN';"],
["\\)", "return 'RPAREN';"],
[";", "return 'SEMICOLON';"],
["\\s+", "/* skip whitespace */"],
[".", "print('Illegal character'); throw 'Illegal character';"],
["$", "return 'ENDOFFILE';"]
]
}
};
var input = "class Node extends Object { \
var nat value var nat value;\
var Node next;\
var nat index;\
}\
\
class List extends Object {\
var Node start;\
\
Node prepend(Node startNode) {\
startNode.next = start;\
start = startNode;\
}\
\
nat find(nat index) {\
var nat value;\
var Node node;\
\
for(node = start;!(node == null);node = node.next){\
if(node.index == index){\
value = node.value;\
} else { 0; };\
};\
\
value;\
}\
}\
\
main {\
var nat index;\
var nat value;\
var List list;\
var Node startNode;\
\
index = readNat();\
list = new List;\
\
for(0;!(index==0);0){\
value = readNat();\
startNode = new Node;\
startNode.index = index;\
startNode.value = value;\
list.prepend(startNode);\
index = readNat();\
};\
\
index = readNat();\
\
for(0;!(index==0);0){\
printNat(list.find(index));\
index = readNat();\
};\
}";
var lexer = new RegExpLexer(dict.lex);
lexer.setInput(input);
var tok;
while (tok = lexer.lex(), tok !== 1) {
assert.equal(typeof tok, "string");
}
});
it("test instantiation from string", function() {
var dict = "%%\n'x' {return 'X';}\n'y' {return 'Y';}\n<<EOF>> {return 'EOF';}";
var input = "x";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "EOF");
});
it("test inclusive start conditions", function() {
var dict = {
startConditions: {
"TEST": 0,
},
rules: [
["enter-test", "this.begin('TEST');" ],
[["TEST"], "x", "return 'T';" ],
[["TEST"], "y", "this.begin('INITIAL'); return 'TY';" ],
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input = "xenter-testxyy";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "T");
assert.equal(lexer.lex(), "TY");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "EOF");
});
it("test exclusive start conditions", function() {
var dict = {
startConditions: {
"EAT": 1,
},
rules: [
["\\/\\/", "this.begin('EAT');" ],
[["EAT"], ".", "" ],
[["EAT"], "\\n", "this.begin('INITIAL');" ],
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input = "xy//yxteadh//ste\ny";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "EOF");
});
it("test pop start condition stack", function() {
var dict = {
startConditions: {
"EAT": 1,
},
rules: [
["\\/\\/", "this.begin('EAT');" ],
[["EAT"], ".", "" ],
[["EAT"], "\\n", "this.popState();" ],
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input = "xy//yxteadh//ste\ny";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "EOF");
});
it("test star start condition", function() {
var dict = {
startConditions: {
"EAT": 1,
},
rules: [
["\\/\\/", "this.begin('EAT');" ],
[["EAT"], ".", "" ],
["x", "return 'X';" ],
["y", "return 'Y';" ],
[["*"], "$", "return 'EOF';" ]
]
};
var input = "xy//yxteadh//stey";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "EOF");
});
it("test start condition constants", function() {
var dict = {
startConditions: {
"EAT": 1,
},
rules: [
["\\/\\/", "this.begin('EAT');" ],
[["EAT"], ".", "if (YYSTATE === 'EAT') return 'E';" ],
["x", "if (YY_START === 'INITIAL') return 'X';" ],
["y", "return 'Y';" ],
[["*"], "$", "return 'EOF';" ]
]
};
var input = "xy//y";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "E");
assert.equal(lexer.lex(), "EOF");
});
it("test start condition & warning", function() {
var dict = {
startConditions: {
"INITIAL": 0,
},
rules: [
["\\/\\/", "this.begin('EAT');" ],
[["EAT"], ".", "if (YYSTATE === 'EAT') return 'E';" ],
["x", "if (YY_START === 'INITIAL') return 'X';" ],
["y", "return 'Y';" ],
[["*"], "$", "return 'EOF';" ]
]
};
var input = "xy//y";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "E");
assert.equal(lexer.lex(), "EOF");
});
it("test unicode encoding", function() {
var dict = {
rules: [
["\\u2713", "return 'CHECK';" ],
["\\u03c0", "return 'PI';" ],
["y", "return 'Y';" ]
]
};
var input = "\u2713\u03c0y";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "CHECK");
assert.equal(lexer.lex(), "PI");
assert.equal(lexer.lex(), "Y");
});
it("test unicode", function() {
var dict = {
rules: [
["π", "return 'PI';" ],
["y", "return 'Y';" ]
]
};
var input = "πy";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "PI");
assert.equal(lexer.lex(), "Y");
});
it("test longest match returns", function() {
var dict = {
rules: [
[".", "return 'DOT';" ],
["cat", "return 'CAT';" ]
],
options: {flex: true}
};
var input = "cat!";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "CAT");
assert.equal(lexer.lex(), "DOT");
});
it("test case insensitivity", function() {
var dict = {
rules: [
["cat", "return 'CAT';" ]
],
options: {'case-insensitive': true}
};
var input = "Cat";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "CAT");
});
it("test camelCased json options", function() {
var dict = {
rules: [
["cat", "return 'CAT';" ]
],
options: {
caseInsensitive: true
}
};
var input = "Cat";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "CAT");
});
it("test less", function() {
var dict = {
rules: [
["cat", "this.less(2); return 'CAT';" ],
["t", "return 'T';" ]
],
};
var input = "cat";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "CAT");
assert.equal(lexer.lex(), "T");
});
it("test EOF unput", function() {
var dict = {
startConditions: {
"UN": 1,
},
rules: [
["U", "this.begin('UN');return 'U';" ],
[["UN"], "$", "this.unput('X')" ],
[["UN"], "X", "this.popState();return 'X';" ],
["$", "return 'EOF'" ]
]
};
var input = "U";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "U");
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "EOF");
});
it("test flex mode default rule", function() {
var dict = {
rules: [
["x", "return 'X';" ]
],
options: {flex: true}
};
var input = "xyx";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), "X");
});
it("test pipe precedence", function() {
var dict = {
rules: [
["x|y", "return 'X_Y';" ],
[".", "return 'N';"]
]
};
var input = "xny";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "X_Y");
assert.equal(lexer.lex(), "N");
assert.equal(lexer.lex(), "X_Y");
});
it("test ranges", function() {
var dict = {
rules: [
["x+", "return 'X';" ],
[".", "return 'N';"]
],
options: {ranges: true}
};
var input = "xxxyy";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
assert.deepEqual(lexer.yylloc.range, [0, 3]);
});
it("test unput location", function() {
var dict = {
rules: [
["x+", "return 'X';" ],
["y\\n", "this.unput('\\n'); return 'Y';" ],
["\\ny", "this.unput('y'); return 'BR';" ],
["y", "return 'Y';" ],
[".", "return 'N';"]
],
options: {ranges: true}
};
var input = "xxxy\ny";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.next(), "X");
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 0,
last_line: 1,
last_column: 3,
range: [0, 3]});
assert.equal(lexer.next(), "Y");
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 3,
last_line: 1,
last_column: 4,
range: [3, 4]});
assert.equal(lexer.next(), "BR");
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 4,
last_line: 2,
last_column: 0,
range: [4, 5]});
assert.equal(lexer.next(), "Y");
assert.deepEqual(lexer.yylloc, {first_line: 2,
first_column: 0,
last_line: 2,
last_column: 1,
range: [5, 6]});
});
it("test unput location again", function() {
var dict = {
rules: [
["x+", "return 'X';" ],
["y\\ny\\n", "this.unput('\\n'); return 'YY';" ],
["\\ny", "this.unput('y'); return 'BR';" ],
["y", "return 'Y';" ],
[".", "return 'N';"]
],
options: {ranges: true}
};
var input = "xxxy\ny\ny";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.next(), "X");
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 0,
last_line: 1,
last_column: 3,
range: [0, 3]});
assert.equal(lexer.next(), "YY");
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 3,
last_line: 2,
last_column: 1,
range: [3, 6]});
assert.equal(lexer.next(), "BR");
assert.deepEqual(lexer.yylloc, {first_line: 2,
first_column: 1,
last_line: 3,
last_column: 0,
range: [6, 7]});
assert.equal(lexer.next(), "Y");
assert.deepEqual(lexer.yylloc, {first_line: 3,
first_column: 0,
last_line: 3,
last_column: 1,
range: [7, 8]});
});
it("test backtracking lexer reject() method", function() {
var dict = {
rules: [
["[A-Z]+([0-9]+)", "if (this.matches[1].length) this.reject(); else return 'ID';" ],
["[A-Z]+", "return 'WORD';" ],
["[0-9]+", "return 'NUM';" ]
],
options: {backtrack_lexer: true}
};
var input = "A5";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "WORD");
assert.equal(lexer.lex(), "NUM");
});
it("test lexer reject() exception when not in backtracking mode", function() {
var dict = {
rules: [
["[A-Z]+([0-9]+)", "if (this.matches[1].length) this.reject(); else return 'ID';" ],
["[A-Z]+", "return 'WORD';" ],
["[0-9]+", "return 'NUM';" ]
],
options: {backtrack_lexer: false}
};
var input = "A5";
var lexer = new RegExpLexer(dict);
var JisonLexerError = lexer.JisonLexerError;
assert(JisonLexerError);
lexer.setInput(input);
assert.throws(function() {
lexer.lex();
},
JisonLexerError,
/Lexical error on line \d+[^]*?You can only invoke reject\(\) in the lexer when the lexer is of the backtracking persuasion/
);
});
it("test yytext state after unput", function() {
var dict = {
rules: [
["cat4", "this.unput('4'); return 'CAT';" ],
["4", "return 'NUMBER';" ],
["$", "return 'EOF';"]
]
};
var input = "cat4";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "CAT");
/*the yytext should be 'cat' since we unput '4' from 'cat4' */
assert.equal(lexer.yytext, "cat");
assert.equal(lexer.lex(), "NUMBER");
assert.equal(lexer.lex(), "EOF");
});
it("test not blowing up on a sequence of ignored tokens the size of the maximum callstack size", function() {
var dict = {
rules: [
["#", "// ignored" ],
["$", "return 'EOF';"]
]
};
/**
* Crafts a src string of `#`s for our rules the size of the current maximum callstack.
* The lexer used to blow up with a stack overflow error in this case.
*/
var makeStackBlowingHashes = function() {
try {
return "#" + makeStackBlowingHashes();
} catch (e) {
return "#";
}
};
var input = makeStackBlowingHashes();
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "EOF");
});
it("test custom parseError handler", function() {
var dict = {
rules: [
["x", "return 't';" ]
]
};
var input = "xyz ?";
var counter = 0;
var lexer = new RegExpLexer(dict);
lexer.setInput(input, {
parser: {
parseError: function (str, hash) {
counter++;
}
}
});
assert.equal(lexer.lex(), "t");
assert.equal(lexer.yytext, "x");
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(counter, 1);
assert.equal(lexer.yytext, "y");
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(counter, 2);
assert.equal(lexer.yytext, "z");
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(counter, 3);
assert.equal(lexer.yytext, " ");
assert.equal(lexer.lex(), lexer.ERROR);
assert.equal(counter, 4);
assert.equal(lexer.yytext, "?");
assert.equal(lexer.lex(), lexer.EOF);
assert.equal(lexer.yytext, "");
// and then the lexer keeps on spitting out EOF tokens ad nauseam:
assert.equal(lexer.lex(), lexer.EOF);
assert.equal(lexer.yytext, "");
assert.equal(lexer.lex(), lexer.EOF);
assert.equal(lexer.yytext, "");
});
it("test custom parseError handler which produces a replacement token", function() {
var dict = {
rules: [
["x", "return 't';" ]
]
};
var input = "xyz ?";
var counter = 0;
var c1, c2;
var lexer = new RegExpLexer(dict);
lexer.setInput(input, {
parser: {
parseError: function (str, hash) {
counter++;
assert.ok(hash.lexer);
// eat two more characters
c1 = hash.lexer.input();
c2 = hash.lexer.input();
return 'alt';
}
}
});
assert.equal(lexer.lex(), "t");
assert.equal(lexer.yytext, "x");
assert.equal(lexer.lex(), 'alt');
assert.equal(counter, 1);
assert.equal(c1, "y");
assert.equal(c2, "z");
assert.equal(lexer.yytext, "yz");
assert.equal(lexer.lex(), 'alt');
assert.equal(counter, 2);
assert.equal(c1, " ");
assert.equal(c2, "?");
assert.equal(lexer.yytext, " ?");
assert.equal(lexer.lex(), lexer.EOF);
assert.equal(lexer.yytext, "");
// and then the lexer keeps on spitting out EOF tokens ad nauseam:
assert.equal(lexer.lex(), lexer.EOF);
assert.equal(lexer.yytext, "");
assert.equal(lexer.lex(), lexer.EOF);
assert.equal(lexer.yytext, "");
});
it("test custom pre and post handlers", function() {
var dict = {
options: {
pre_lex: function () {
counter += 1;
if (counter % 2 === 1) {
return 'PRE';
}
},
post_lex: function (tok) {
counter += 2;
return 'a:' + tok;
}
},
rules: [
["[a-z]", "return 't';" ]
]
};
var input = "xyz";
var counter = 0;
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "a:PRE");
assert.equal(lexer.yytext, "");
assert.equal(counter, 3);
assert.equal(lexer.lex(), "a:t");
assert.equal(lexer.yytext, "x");
assert.equal(counter, 6);
assert.equal(lexer.lex(), "a:PRE");
// as our PRE handler causes the lexer to produce another token immediately
// without entering the lexer proper, `yytext` et al are NOT RESET:
assert.equal(lexer.yytext, "x");
assert.equal(counter, 9);
assert.equal(lexer.lex(), "a:t");
assert.equal(lexer.yytext, "y");
assert.equal(counter, 12);
assert.equal(lexer.lex(), "a:PRE");
assert.equal(lexer.yytext, "y");
assert.equal(counter, 15);
assert.equal(lexer.lex(), "a:t");
assert.equal(lexer.yytext, "z");
assert.equal(counter, 18);
assert.equal(lexer.lex(), "a:PRE");
assert.equal(lexer.yytext, "z");
assert.equal(counter, 21);
assert.equal(lexer.EOF, 1);
assert.equal(lexer.lex(), "a:1");
assert.equal(lexer.yytext, "");
assert.equal(counter, 24);
// and then the lexer keeps on spitting out post-processed EOF tokens ad nauseam
// interleaved with PRE tokens produced by the PRE handler:
assert.equal(lexer.lex(), "a:PRE");
assert.equal(lexer.yytext, "");
assert.equal(counter, 27);
assert.equal(lexer.lex(), "a:1"); // EOF
assert.equal(lexer.yytext, "");
assert.equal(counter, 30);
assert.equal(lexer.lex(), "a:PRE");
assert.equal(lexer.yytext, "");
assert.equal(counter, 33);
assert.equal(lexer.lex(), "a:1");
assert.equal(lexer.yytext, "");
assert.equal(counter, 36);
});
it("test live replacement of custom pre and post handlers", function() {
var dict = {
options: {
pre_lex: function () {
counter += 1;
if (counter % 2 === 1) {
return 'PRE';
}
},
post_lex: function (tok) {
counter += 2;
return 'a:' + tok;
}
},
rules: [
["[a-z]", "return 't';" ]
]
};
var input = "xyz";
var counter = 0;
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "a:PRE");
assert.equal(lexer.yytext, "");
assert.equal(counter, 3);
assert.equal(lexer.lex(), "a:t");
assert.equal(lexer.yytext, "x");
assert.equal(counter, 6);
assert.equal(lexer.lex(), "a:PRE");
// as our PRE handler causes the lexer to produce another token immediately
// without entering the lexer proper, `yytext` et al are NOT RESET:
assert.equal(lexer.yytext, "x");
assert.equal(counter, 9);
lexer.options.pre_lex = null;
lexer.options.post_lex = function (tok) {
counter--;
if (tok !== lexer.EOF) {
return 'V2:' + tok;
}
// default return of undefined/false/0 will have the lexer produce the raw token
};
assert.equal(lexer.lex(), "V2:t");
assert.equal(lexer.yytext, "y");
assert.equal(counter, 8);
assert.equal(lexer.lex(), "V2:t");
assert.equal(lexer.yytext, "z");
assert.equal(counter, 7);
assert.equal(lexer.EOF, 1);
assert.equal(lexer.lex(), lexer.EOF);
assert.equal(lexer.yytext, "");
assert.equal(counter, 6);
// and then the lexer keeps on spitting out post-processed EOF tokens ad nauseam
// interleaved with PRE tokens produced by the PRE handler:
assert.equal(lexer.lex(), lexer.EOF);
assert.equal(lexer.yytext, "");
assert.equal(counter, 5);
assert.equal(lexer.lex(), lexer.EOF);
assert.equal(lexer.yytext, "");
assert.equal(counter, 4);
assert.equal(lexer.lex(), lexer.EOF);
assert.equal(lexer.yytext, "");
assert.equal(counter, 3);
});
it("test edge case which could break documentation comments in the generated lexer", function() {
var dict = {
rules: [
["\\*\\/", "return 'X';" ],
["\"*/\"", "return 'Y';" ],
["'*/'", "return 'Z';" ]
]
};
var input = "*/";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "X");
assert.equal(lexer.lex(), lexer.EOF);
});
it("test yylloc info object must be unique for each token", function() {
var dict = {
rules: [
["[a-z]", "return 'X';" ]
],
options: {ranges: true}
};
var input = "xyz";
var prevloc = null;
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "X");
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 0,
last_line: 1,
last_column: 1,
range: [0, 1]});
prevloc = lexer.yylloc;
assert.equal(lexer.lex(), "X");
assert.notStrictEqual(prevloc, lexer.yylloc);
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 1,
last_line: 1,
last_column: 2,
range: [1, 2]});
prevloc = lexer.yylloc;
assert.equal(lexer.lex(), "X");
assert.notStrictEqual(prevloc, lexer.yylloc);
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 2,
last_line: 1,
last_column: 3,
range: [2, 3]});
prevloc = lexer.yylloc;
assert.equal(lexer.lex(), lexer.EOF);
// not so for EOF:
Iif (0) {
assert.notStrictEqual(prevloc, lexer.yylloc);
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 3,
last_line: 1,
last_column: 3,
range: [3, 3]});
}
});
it("test yylloc info object is not modified by subsequent lex() activity", function() {
var dict = {
rules: [
["[a-z]", "return 'X';" ]
],
options: {ranges: true}
};
var input = "xyz";
var prevloc = null;
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "X");
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 0,
last_line: 1,
last_column: 1,
range: [0, 1]});
prevloc = lexer.yylloc;
assert.equal(lexer.lex(), "X");
assert.notStrictEqual(prevloc, lexer.yylloc);
assert.deepEqual(prevloc, {first_line: 1,
first_column: 0,
last_line: 1,
last_column: 1,
range: [0, 1]});
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 1,
last_line: 1,
last_column: 2,
range: [1, 2]});
prevloc = lexer.yylloc;
assert.equal(lexer.lex(), "X");
assert.notStrictEqual(prevloc, lexer.yylloc);
assert.deepEqual(prevloc, {first_line: 1,
first_column: 1,
last_line: 1,
last_column: 2,
range: [1, 2]});
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 2,
last_line: 1,
last_column: 3,
range: [2, 3]});
prevloc = lexer.yylloc;
assert.equal(lexer.lex(), lexer.EOF);
// not so for EOF:
Iif (0) {
assert.notStrictEqual(prevloc, lexer.yylloc);
assert.deepEqual(prevloc, {first_line: 1,
first_column: 2,
last_line: 1,
last_column: 3,
range: [2, 3]});
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 3,
last_line: 1,
last_column: 3,
range: [3, 3]});
}
});
it("test yylloc info object CAN be modified by subsequent input() activity", function() {
var dict = {
rules: [
["[a-z]", "return 'X';" ]
],
options: {ranges: true}
};
var input = "xyz";
var prevloc = null;
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "X");
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 0,
last_line: 1,
last_column: 1,
range: [0, 1]});
prevloc = lexer.yylloc;
assert.equal(lexer.lex(), "X");
assert.notStrictEqual(prevloc, lexer.yylloc);
assert.deepEqual(prevloc, {first_line: 1,
first_column: 0,
last_line: 1,
last_column: 1,
range: [0, 1]});
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 1,
last_line: 1,
last_column: 2,
range: [1, 2]});
prevloc = lexer.yylloc;
assert.equal(lexer.input(), "z");
// this will modify the existing yylloc:
assert.strictEqual(prevloc, lexer.yylloc);
assert.deepEqual(prevloc, {first_line: 1,
first_column: 1,
last_line: 1,
last_column: 3,
range: [1, 3]});
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 1,
last_line: 1,
last_column: 3,
range: [1, 3]});
prevloc = lexer.yylloc;
assert.equal(lexer.lex(), lexer.EOF);
// yylloc on EOF is NOT the same yylloc object as before: EOF is just another token, WITH its own yylloc info...
assert.notStrictEqual(prevloc, lexer.yylloc);
// and this yylloc value set is intuitive because EOF does update yylloc like any other lexed token:
assert.deepEqual(lexer.yylloc, {first_line: 1,
first_column: 3,
last_line: 1,
last_column: 3,
range: [3, 3]});
});
it("test empty rule set with custom lexer", function() {
var src = null;
// Wrap the custom lexer code in a function so we can String()-dump it:
/* istanbul ignore next: action code is injected and then crashes the generated parser due to unreachable coverage global */
function customLexerCode() {
var input = "";
var input_offset = 0;
var lexer = {
EOF: 1,
ERROR: 2,
options: {},
lex: function () {
if (input.length > input_offset) {
return "a" + input[input_offset++];
} else {
return this.EOF;
}
},
setInput: function (inp) {
input = inp;
input_offset = 0;
}
};
}
var dict = {
rules: [],
actionInclude: String(customLexerCode).replace(/function [^\{]+\{/, '').replace(/\}$/, ''),
moduleInclude: 'console.log("moduleInclude");',
options: {
foo: 'bar',
showSource: function (lexer, source, opts) {
src = source;
}
}
};
var input = "xxyx";
var lexer = new RegExpLexer(dict, input);
assert.equal(lexer.lex(), "ax");
assert.equal(lexer.lex(), "ax");
assert.equal(lexer.lex(), "ay");
assert.equal(lexer.lex(), "ax");
assert.equal(lexer.lex(), lexer.EOF);
});
it("test XRegExp option support", function() {
var dict = {
options: {
xregexp: true
},
rules: [
["π", "return 'PI';" ],
["\\p{Alphabetic}", "return 'Y';" ],
["[\\p{Number}]", "return 'N';" ]
]
};
var input = "πyαε";
var lexer = new RegExpLexer(dict);
// ensure the XRegExp class is invoked for the unicode rules; see also the compilation validation test code
// inside the regexp-lexer.js file for the counterpart of this nasty test:
//
// var __hacky_counter__ = 0;
// function XRegExp(re, f) {
// this.re = re;
// this.flags = f;
// var fake = /./; // WARNING: this exact 'fake' is also depended upon by the xregexp unit test!
// __hacky_counter__++;
// fake.__hacky_backy__ = __hacky_counter__;
// return fake;
// }
//
var generated_ruleset = lexer.rules;
assert(generated_ruleset);
var xregexp_count = 0;
for (var i = 0; i < generated_ruleset.length; i++) {
var rule = generated_ruleset[i];
assert(rule);
if (rule.__hacky_backy__) {
xregexp_count += rule.__hacky_backy__;
}
}
assert.equal(xregexp_count, 1 + 2);
// run the lexer and check the tokens produced by it: the faked version will be active but will deliver something
// similar to the real XRegExp for this particular ruleset only!
lexer.setInput(input);
assert.equal(lexer.lex(), "PI");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), lexer.EOF);
});
it("test support for basic unicode regex compilation via internal xregexp", function() {
var dict = {
options: {
xregexp: false // !!!
},
rules: [
["π", "return 'PI';" ],
["\\p{Alphabetic}", "return 'Y';" ],
["[\\p{Number}]", "return 'N';" ]
]
};
var input = "πyα1ε";
var lexer = new RegExpLexer(dict);
var generated_ruleset = lexer.rules;
assert(generated_ruleset);
var xregexp_count = 0;
for (var i = 0; i < generated_ruleset.length; i++) {
var rule = generated_ruleset[i];
assert(rule);
Iif (rule.__hacky_backy__) {
xregexp_count += rule.__hacky_backy__;
}
}
assert.equal(xregexp_count, 0);
// run the lexer
lexer.setInput(input);
assert.equal(lexer.lex(), "PI");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "N");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), lexer.EOF);
});
it("test support for unicode macro expansion via internal xregexp", function() {
var dict = {
options: {
xregexp: false // !!!
},
macros: {
"DIGIT": "[\\p{Number}]"
},
rules: [
["π", "return 'PI';" ],
["\\p{Alphabetic}", "return 'Y';" ],
["{DIGIT}+", "return 'N';" ]
]
};
var input = "πyα123ε";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "PI");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "N");
assert.equal(lexer.match, "123");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.match, "ε");
assert.equal(lexer.lex(), lexer.EOF);
});
it("test macro expansion in regex set atom", function() {
var dict = {
options: {
xregexp: false // !!!
},
macros: {
"DIGIT": "[\\p{Number}]"
},
rules: [
["π", "return 'PI';" ],
["\\p{Alphabetic}", "return 'Y';" ],
["{DIGIT}+", "return 'N';" ]
]
};
var input = "πyα123ε";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "PI");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.lex(), "N");
assert.equal(lexer.match, "123");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.match, "ε");
assert.equal(lexer.lex(), lexer.EOF);
});
it("test nested macro expansion in xregexp set atoms", function() {
var dict = {
options: {
xregexp: false // !!!
},
macros: {
"DIGIT": "[\\p{Number}]",
"ALPHA": "[\\p{Alphabetic}]",
"ALNUM": "[{DIGIT}{ALPHA}]"
},
rules: [
["π", "return 'PI';" ],
["[{ALNUM}]+", "return 'Y';" ],
["{DIGIT}+", "return 'N';" ]
]
};
var input = "πyα123ε";
var lexer = new RegExpLexer(dict);
var expandedMacros = lexer.getExpandedMacros();
//console.log("MACROS:::::::::::::::", expandedMacros);
// assert.equal(expandedMacros.DIGIT.in_set, re2set('[\\p{Number}]'));
// assert.equal(expandedMacros.ALPHA.in_set, re2set('[\\p{Alphabetic}]'));
// assert.equal(expandedMacros.ALNUM.in_set, re2set('[\\p{Number}\\p{Alphabetic}]'));
// assert.equal(expandedMacros.ALNUM.elsewhere, '[' + re2set('[\\p{Number}\\p{Alphabetic}]') + ']');
lexer.setInput(input);
assert.equal(lexer.lex(), "PI");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.match, "yα123ε");
assert.equal(lexer.lex(), lexer.EOF);
});
it("test macros in regex set atoms are recognized when coming from grammar string", function() {
var dict = [
"DIGIT [\\p{Number}]",
"ALPHA [\\p{Alphabetic}]",
"ALNUM [{DIGIT}{ALPHA}]",
"",
"%%",
"",
"π return 'PI';",
"[{ALNUM}]+ return 'Y';",
"[{DIGIT}]+ return 'N';",
].join('\n');
var input = "πyα123ε";
var lexer = new RegExpLexer(dict);
var expandedMacros = lexer.getExpandedMacros();
//console.log("MACROS:::::::::::::::", expandedMacros);
// assert.equal(expandedMacros.DIGIT.in_set, re2set('[\\p{Number}]'));
// assert.equal(expandedMacros.ALPHA.in_set, re2set('[\\p{Alphabetic}]'));
// assert.equal(expandedMacros.ALNUM.in_set, re2set('[\\p{Number}\\p{Alphabetic}]'));
// assert.equal(expandedMacros.ALNUM.elsewhere, '[' + re2set('[\\p{Number}\\p{Alphabetic}]') + ']');
// assert.equal(expandedMacros.ALNUM.raw, '[{DIGIT}{ALPHA}]');
lexer.setInput(input);
assert.equal(lexer.lex(), "PI");
assert.equal(lexer.lex(), "Y");
assert.equal(lexer.match, "yα123ε");
assert.equal(lexer.lex(), lexer.EOF);
});
it("test nested macro expansion in regex set atoms", function() {
var dict = {
options: {
xregexp: false
},
macros: {
"DIGIT": "[0-9]",
"ALPHA": "[a-zA-Z]",
"ALNUM": "[{DIGIT}{ALPHA}]"
},
rules: [
["π", "return 'PI';" ],
["[{ALNUM}]+", "return 'Y';" ],
["{DIGIT}+", "return 'N';" ],
[".", "return '?';" ]
]
};
var input = "πyα123εE";
var lexer = new RegExpLexer(dict);
var expandedMacros = lexer.getExpandedMacros();
//console.log("MACROS:::::::::::::::", expandedMacros);
assert.equal(expandedMacros.DIGIT.in_set, '\\d');
assert.equal(expandedMacros.ALPHA.in_set, 'A-Za-z');
assert.equal(expandedMacros.ALNUM.in_set, '0-9A-Za-z');
assert.equal(expandedMacros.ALNUM.elsewhere, '[^\\W_]'); /* [0-9A-Za-z] */
lexer.setInput(input);
assert.equal(lexer.lex(), "PI");
assert.equal(lexer.lex() + '=' + lexer.match, "Y=y");
assert.equal(lexer.lex() + '=' + lexer.match, "?=α");
assert.equal(lexer.lex() + '=' + lexer.match, "Y=123"); // (!) not 'N=123' as ALNUM-based rule comes before DIGIT rule.
assert.equal(lexer.lex() + '=' + lexer.match, "?=ε");
assert.equal(lexer.lex() + '=' + lexer.match, "Y=E");
assert.equal(lexer.lex(), lexer.EOF);
});
it("test nested macro expansion in regex set atoms with negating surrounding set (1 level)", function() {
var dict = {
options: {
xregexp: false
},
macros: {
"DIGIT": "[0-9]",
"ALPHA": "[a-zA-Z]",
"ALNUM": "[{DIGIT}{ALPHA}]",
"CTRL": "[^{ALNUM}]",
},
rules: [
["π", "return 'PI';" ],
["{CTRL}+", "return 'C';" ],
["[{ALNUM}]+", "return 'Y';" ],
["{DIGIT}+", "return 'N';" ],
[".", "return '?';" ],
]
};
var input = "πyα * +123.@_[]εE";
var lexer = new RegExpLexer(dict);
var expandedMacros = lexer.getExpandedMacros();
//console.log("MACROS:::::::::::::::", expandedMacros);
assert.equal(expandedMacros.DIGIT.in_set, '\\d');
assert.equal(expandedMacros.ALPHA.in_set, 'A-Za-z');
assert.equal(expandedMacros.ALNUM.in_set, '0-9A-Za-z');
assert.equal(expandedMacros.ALNUM.elsewhere, '[^\\W_]'); /* [0-9A-Za-z] */
// assert.equal(expandedMacros.CTRL.in_inv_set, '0-9A-Za-z');
assert.equal(expandedMacros.CTRL.elsewhere, '[\\W_]'); /* [^0-9A-Za-z] */
lexer.setInput(input);
assert.equal(lexer.lex(), "PI");
assert.equal(lexer.lex() + '=' + lexer.match, "Y=y");
assert.equal(lexer.lex() + '=' + lexer.match, "C=α * +");
assert.equal(lexer.lex() + '=' + lexer.match, "Y=123"); // (!) not 'N=123' as ALNUM-based rule comes before DIGIT rule.
assert.equal(lexer.lex() + '=' + lexer.match, "C=.@_[]ε");
assert.equal(lexer.lex() + '=' + lexer.match, "Y=E");
assert.equal(lexer.lex(), lexer.EOF);
});
it("test nested macro expansion in regex set atoms with negating inner set", function() {
var dict = {
options: {
xregexp: false
},
macros: {
"DIGIT": "[0-9]",
"ALPHA": "[a-zA-Z]",
"ALNUM": "[{DIGIT}{ALPHA}]|[{DIGIT}]",
"CTRL": "[^{ALNUM}]",
"WORD": "[BLUB:]|[^{CTRL}]",
"WORDS": "[{WORD}]+",
"DIGITS":"[{DIGIT}]+",
"WS": "[^\\S\\r\\n]",
"NONE": "[^\\W\\w]",
"ANY": "[\\W\\w]",
},
rules: [
["π", "return 'PI';" ],
["{CTRL}+", "return 'C';" ],
["[{WORD}]+", "return 'Y';" ],
["[{DIGIT}]+", "return 'N';" ],
[".", "return '?';" ],
]
};
var input = "πyα * +123.@_[]εE";
var lexer = new RegExpLexer(dict);
var expandedMacros = lexer.getExpandedMacros();
//console.log("MACROS:::::::::::::::", expandedMacros);
assert.equal(expandedMacros.DIGIT.in_set, '\\d');
assert.equal(expandedMacros.ALPHA.in_set, 'A-Za-z');
assert.equal(expandedMacros.ALNUM.in_set, '0-9A-Za-z');
assert.equal(expandedMacros.ALNUM.elsewhere, '[^\\W_]|\\d'); /* [0-9A-Za-z]|[0-9] */
assert.equal(expandedMacros.CTRL.in_set, '\\u0000-/:-@\\[-`{-\\uffff' /* '^0-9a-zA-Z' */ );
assert.equal(expandedMacros.CTRL.elsewhere, '[\\W_]'); /* [^0-9A-Za-z] */
assert.equal(expandedMacros.WORD.in_set, '0-:A-Za-z');
assert.equal(expandedMacros.WORD.elsewhere, '[:BLU]|[^\\W_]');
// Unicode Character 'LINE SEPARATOR' (U+2028) and Unicode Character 'PARAGRAPH SEPARATOR' (U+2029) must be explicitly encoded in \uNNNN
// syntax to prevent crashes when the generated is compiled via `new Function()` as that one doesn't like it when you feed it
// regexes with these two characters embedded as is!
assert.equal(expandedMacros.WS.in_set, '\\t\\v\\f \u00a0\u1680\u180e\u2000-\u200a\\u2028\\u2029\u202f\u205f\u3000\ufeff');
assert.equal(expandedMacros.WS.elsewhere, '[^\\S\\n\\r]');
assert.equal(expandedMacros.ANY.in_set, '\\S\\s');
assert.equal(expandedMacros.ANY.elsewhere, '[\\S\\s]');
assert.equal(expandedMacros.NONE.in_set, '^\\S\\s');
assert.equal(expandedMacros.NONE.elsewhere, '[^\\S\\s]');
assert.ok(expandedMacros.DIGITS.in_set instanceof Error);
assert.equal(expandedMacros.DIGITS.elsewhere, '\\d+');
assert.ok(expandedMacros.WORDS.in_set instanceof Error);
assert.equal(expandedMacros.WORDS.elsewhere, '[\\d:A-Za-z]+');
lexer.setInput(input);
assert.equal(lexer.lex(), "PI");
assert.equal(lexer.lex() + '=' + lexer.match, "Y=y");
assert.equal(lexer.lex() + '=' + lexer.match, "C=α * +");
assert.equal(lexer.lex() + '=' + lexer.match, "Y=123"); // (!) not 'N=123' as ALNUM-based rule comes before DIGIT rule.
assert.equal(lexer.lex() + '=' + lexer.match, "C=.@_[]ε");
assert.equal(lexer.lex() + '=' + lexer.match, "Y=E");
assert.equal(lexer.lex(), lexer.EOF);
});
it("test Unicode Supplementary Plane detection in regex set atoms - part 1", function() {
var dict = {
options: {
xregexp: false
},
macros: {
"ISSUE_A": "[\\t\\n\\r\\u0120-\\uD7FF\\uE000\\uFFFD]", // \\u10000-\\u10FFFF
"ISSUE_B": "[\\u001F-\\u002F]", // side test: proper processing of 'dash' as a *character* in a set.
"NOTISSUE": "[^{ISSUE_A}{ISSUE_B}XYZ]", // negating the inner set means we include the U.S.P. in NOTISSUE!
"NOTNOTISSUE": "[^{NOTISSUE}]", // while negating the *negated set* once again *excludes* the U.S.P. in NOTNOTISSUE!
},
rules: [
["{ISSUE_A}+", "return 'A';" ],
["{ISSUE_B}+", "return 'B';" ],
// ["{NOTISSUE}+", "return 'N';" ],
["{NOTNOTISSUE}+", "return 'C';" ],
["[{ISSUE_A}]+", "return 'X';" ],
["[{ISSUE_B}]+", "return 'Y';" ],
// ["[{NOTISSUE}]+", "return 'W';" ],
["[{NOTNOTISSUE}]+", "return 'Z';" ],
[".", "return '?';" ],
]
};
var input = "πXYZxyzα\u10000\u{0023}\u{1023}\u{10230}ε";
var lexer = new RegExpLexer(dict);
var expandedMacros = lexer.getExpandedMacros();
//console.log("MACROS:::::::::::::::", expandedMacros);
// test the calculated regexes -- the 'sollwert' for the test takes `i2c()` encoding particulars into account:
assert.equal(expandedMacros.ISSUE_A.in_set, '\\t\\n\\r\u0120-\uD7FF\uE000\\ufffd');
assert.equal(expandedMacros.ISSUE_A.elsewhere, '[\\t\\n\\r\u0120-\uD7FF\uE000\\ufffd]');
assert.equal(expandedMacros.ISSUE_B.in_set, '\\u001f-\u002F');
assert.equal(expandedMacros.ISSUE_B.elsewhere, '[\\u001f-\u002F]');
assert.equal(expandedMacros.NOTISSUE.in_set, '\\u0000-\\b\\v\\f\\u000e-\\u001e0-W\\[-\u011f\\ud800-\\udfff\ue001-\\ufffc\\ufffe\\uffff');
assert.equal(expandedMacros.NOTISSUE.elsewhere, '[^\\t\\n\\r\\u001f-\u002FX-Z\u0120-\uD7FF\uE000\\ufffd]');
assert.equal(expandedMacros.NOTNOTISSUE.in_set, '\\t\\n\\r\\u001f-\u002FX-Z\u0120-\uD7FF\uE000\\ufffd');
assert.equal(expandedMacros.NOTNOTISSUE.elsewhere, '[\\t\\n\\r\\u001f-\u002FX-Z\u0120-\uD7FF\uE000\\ufffd]');
lexer.setInput(input);
assert.equal(lexer.lex() + '=' + lexer.match, "A=π");
assert.equal(lexer.lex() + '=' + lexer.match, "C=XYZ");
assert.equal(lexer.lex() + '=' + lexer.match, "?=x");
assert.equal(lexer.lex() + '=' + lexer.match, "?=y");
assert.equal(lexer.lex() + '=' + lexer.match, "?=z");
assert.equal(lexer.lex() + '=' + lexer.match, "A=α\u1000");
assert.equal(lexer.lex() + '=' + lexer.match, "?=0");
assert.equal(lexer.lex() + '=' + lexer.match, "B=\u0023");
assert.equal(lexer.lex() + '=' + lexer.match, "A=\u1023");
// WARNING: as we don't support Extended Plane Unicode Codepoints
// (i.e. any input character beyond U+FFFF), you will
// observe that these characters, when fed to the lexer, MAY
// be split up in their individual UCS2 Character Codes.
// In this example U+10230 === UCS 0xD800 + UCS 0xDE30
// ('UTF-16' encoding of U+10230)
//assert.equal(lexer.lex() + '=' + lexer.match, "?=\uD800\uDE30"); // U+10230
assert.equal(lexer.lex() + '=' + lexer.match, "?=\uD800");
assert.equal(lexer.lex() + '=' + lexer.match, "?=\uDE30");
assert.equal(lexer.lex() + '=' + lexer.match, "A=ε");
assert.equal(lexer.lex(), lexer.EOF);
});
it("test Unicode Supplementary Plane detection in regex set atoms - part 2 (XRegExp enabled)", function() {
var dict = {
options: {
xregexp: true
},
macros: {
"ISSUE_A": "[\\t\\n\\r\\u0120-\\uD7FF\\uE000\\uFFFD]", // \\u10000-\\u10FFFF
"ISSUE_B": "[\\u001F-\\u002F]", // side test: proper processing of 'dash' as a *character* in a set.
"NOTISSUE": "[^{ISSUE_A}{ISSUE_B}XYZ]", // negating the inner set means we include the U.S.P. in NOTISSUE!
"NOTNOTISSUE": "[^{NOTISSUE}]", // while negating the *negated set* once again *excludes* the U.S.P. in NOTNOTISSUE!
},
rules: [
["{ISSUE_A}+", "return 'A';" ],
["{ISSUE_B}+", "return 'B';" ],
// ["{NOTISSUE}+", "return 'N';" ],
["{NOTNOTISSUE}+", "return 'C';" ],
["[{ISSUE_A}]+", "return 'X';" ],
["[{ISSUE_B}]+", "return 'Y';" ],
// ["[{NOTISSUE}]+", "return 'W';" ],
["[{NOTNOTISSUE}]+", "return 'Z';" ],
[".", "return '?';" ],
]
};
var input = "πXYZxyzα\u10000\u{0023}\u{1023}\u{10230}ε";
var lexer = new RegExpLexer(dict);
var expandedMacros = lexer.getExpandedMacros();
//console.log("MACROS:::::::::::::::", expandedMacros);
// test the calculated regexes -- the 'sollwert' for the test takes `i2c()` encoding particulars into account:
assert.equal(expandedMacros.ISSUE_A.in_set, '\\t\\n\\r\u0120-\uD7FF\uE000\\ufffd');
assert.equal(expandedMacros.ISSUE_A.elsewhere, '[\\t\\n\\r\u0120-\uD7FF\uE000\\ufffd]');
assert.equal(expandedMacros.ISSUE_B.in_set, '\\u001f-\u002F');
assert.equal(expandedMacros.ISSUE_B.elsewhere, '[\\u001f-\u002F]');
assert.equal(expandedMacros.NOTISSUE.in_set, '\\u0000-\\b\\v\\f\\u000e-\\u001e0-W\\[-\u011f\\ud800-\\udfff\ue001-\\ufffc\\ufffe\\uffff');
assert.equal(expandedMacros.NOTISSUE.elsewhere, '[^\\t\\n\\r\\u001f-\u002FX-Z\u0120-\uD7FF\uE000\\ufffd]');
assert.equal(expandedMacros.NOTNOTISSUE.in_set, '\\t\\n\\r\\u001f-\u002FX-Z\u0120-\uD7FF\uE000\\ufffd');
assert.equal(expandedMacros.NOTNOTISSUE.elsewhere, '[\\t\\n\\r\\u001f-\u002FX-Z\u0120-\uD7FF\uE000\\ufffd]');
lexer.setInput(input);
assert.equal(lexer.lex() + '=' + lexer.match, "A=π");
assert.equal(lexer.lex() + '=' + lexer.match, "C=XYZ");
assert.equal(lexer.lex() + '=' + lexer.match, "?=x");
assert.equal(lexer.lex() + '=' + lexer.match, "?=y");
assert.equal(lexer.lex() + '=' + lexer.match, "?=z");
assert.equal(lexer.lex() + '=' + lexer.match, "A=α\u1000");
assert.equal(lexer.lex() + '=' + lexer.match, "?=0");
assert.equal(lexer.lex() + '=' + lexer.match, "B=\u0023");
assert.equal(lexer.lex() + '=' + lexer.match, "A=\u1023");
// WARNING: as we don't support Extended Plane Unicode Codepoints
// (i.e. any input character beyond U+FFFF), you will
// observe that these characters, when fed to the lexer, MAY
// be split up in their individual UCS2 Character Codes.
// In this example U+10230 === UCS 0xD800 + UCS 0xDE30
// ('UTF-16' encoding of U+10230)
//assert.equal(lexer.lex() + '=' + lexer.match, "?=\uD800\uDE30"); // U+10230
assert.equal(lexer.lex() + '=' + lexer.match, "?=\uD800");
assert.equal(lexer.lex() + '=' + lexer.match, "?=\uDE30");
assert.equal(lexer.lex() + '=' + lexer.match, "A=ε");
assert.equal(lexer.lex(), lexer.EOF);
});
it("custom '<<EOF>>' lexer rule must only fire once for end-of-input", function() {
var dict = [
"%%",
"'x' {return 'X';}",
"<<EOF>> {return 'CUSTOM_EOF';}",
". {return yytext;}"
].join('\n');
var input = "x<<EOF>>";
var lexer = new RegExpLexer(dict);
lexer.setInput(input);
assert.equal(lexer.lex(), "X");
// side note: this particular input is also constructed to test/ensure
// that the lexer does not inadvertedly match the literal '<<EOF>>'
// input string with the *special* <<EOF>> lexer rule token!
//
// In other words: if this next lex() call fails, we know we have a
// deep b0rk in the lex compiler (rule parser/recognizer)!
assert.equal(lexer.lex(), "<");
assert.equal(lexer.lex(), "<");
assert.equal(lexer.lex(), "E");
assert.equal(lexer.lex(), "O");
assert.equal(lexer.lex(), "F");
assert.equal(lexer.lex(), ">");
assert.equal(lexer.lex(), ">");
assert.equal(lexer.lex(), "CUSTOM_EOF");
assert.equal(lexer.lex(), lexer.EOF);
assert.equal(lexer.lex(), lexer.EOF);
assert.equal(lexer.lex(), lexer.EOF);
assert.equal(lexer.lex(), lexer.EOF);
});
// related to https://github.com/GerHobbelt/jison/issues/9
it("test multiple independent lexer instances", function() {
var dict1 = {
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var dict2 = {
rules: [
["a", "return 'A';" ],
["b", "return 'B';" ],
["$", "return 'EOF';" ]
]
};
var input1 = "xxyx";
var input2 = "aaba";
var lexer1 = new RegExpLexer(dict1, input1);
var lexer2 = new RegExpLexer(dict2, input2);
assert.equal(lexer1.lex(), "X");
assert.equal(lexer2.lex(), "A");
assert.equal(lexer1.lex(), "X");
assert.equal(lexer2.lex(), "A");
assert.equal(lexer1.lex(), "Y");
assert.equal(lexer2.lex(), "B");
assert.equal(lexer1.lex(), "X");
assert.equal(lexer2.lex(), "A");
assert.equal(lexer1.lex(), "EOF");
assert.equal(lexer2.lex(), "EOF");
});
// related to https://github.com/GerHobbelt/jison/issues/9
it("test cloned yet independent lexer instances", function() {
var dict = {
rules: [
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
]
};
var input1 = "xxyx";
var input2 = "yyx";
var lexerBase = new RegExpLexer(dict /*, input1 */);
function MyLexerClass() {
this.yy = {};
}
MyLexerClass.prototype = lexerBase;
function mkLexer() {
return new MyLexerClass();
}
var lexer1 = mkLexer();
lexer1.setInput(input1, {
one: true
});
var lexer2 = mkLexer();
lexer2.setInput(input2, {
two: true
});
assert.equal(lexer1.lex(), "X");
assert.equal(lexer2.lex(), "Y");
assert.equal(lexer1.lex(), "X");
assert.equal(lexer2.lex(), "Y");
assert.equal(lexer1.lex(), "Y");
assert.equal(lexer2.lex(), "X");
assert.equal(lexer1.lex(), "X");
assert.equal(lexer2.lex(), "EOF");
assert.equal(lexer1.lex(), "EOF");
// once you've gone 'past' EOF, you get the EOF **ID** returned, rather than your custom EOF token.
//
// The `EOF` attribute is just a handy constant defined in the lexer prototype...
assert.equal(lexer2.lex(), lexerBase.EOF);
assert.equal(lexer1.lex(), lexerBase.EOF);
assert.equal(lexer1.EOF, lexerBase.EOF);
assert.equal(lexer2.EOF, lexerBase.EOF);
});
});
// prettyPrintRange() API
describe("prettyPrintRange() API", function () {
it("baseline - not invoking the API via ny error report", function () {
var dict = [
'%%',
'"a" %{ return true; %}',
'"b" %{ return 1; %}',
].join('\n');
var lexer = new RegExpLexer(dict);
var JisonLexerError = lexer.JisonLexerError;
assert(JisonLexerError);
var input = "abab";
lexer.setInput(input);
assert.strictEqual(lexer.lex(), true);
assert.strictEqual(lexer.lex(), 1);
assert.strictEqual(lexer.lex(), true);
assert.strictEqual(lexer.lex(), 1);
assert.strictEqual(lexer.lex(), lexer.EOF);
});
it("is invoked when lexer cannot parse the spec due to faulty indentation", function () {
var dict = [
'%%',
// rule regex MUST start the line; indentation (incorrectly) indicates this is all 'action code':
' "a" %{ return true; %}',
' "b" %{ return 1; %}',
].join('\n');
assert.throws(function () {
var lexer = new RegExpLexer(dict);
},
Error,
/an error in one or more of your lexer regex rules/
);
});
it("is invoked when lexer cannot find the end of a rule's action code block (alt 1)", function () {
var dict = [
'%%',
// %{...%} action code blocks can contain ANYTHING, so
// we won't find this error until we validate-parse-as-JS
// the collected first action's source code.
'"a" %{ return true; ',
'"b" %{ return 1; %}',
].join('\n');
assert.throws(function () {
var lexer = new RegExpLexer(dict, null, null, {
dumpSourceCodeOnFailure: false
});
},
Error,
/The rule\'s action code section does not compile[^]*?\n Erroneous area:\n1: %%\n2: "a" %\{ return true; \n\^\.\.\.\.\.\.\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\n3: "b" %\{ return 1; %\}\n\^\.\.\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^/
);
});
it("is invoked when lexer cannot find the end of a rule's action code block (alt 2)", function () {
var dict = [
'%%',
// %{...%} action code blocks can contain ANYTHING.
// Hence we won't find this error until we validate-parse-as-JS
// the entire generated lexer source code.
'"a" %{ return true; %}',
'"b" %{ return 1; ',
].join('\n');
assert.throws(function () {
var lexer = new RegExpLexer(dict, null, null, {
dumpSourceCodeOnFailure: false
});
},
Error,
/Error: Lexical error on line 3:[^]*?missing 1 closing curly braces in lexer rule action block.[^]*?help jison grok more or less complex action code chunks.\n\n Erroneous area:\n1: %%\n2: "a" %{ return true; %}\n3: "b" %{ return 1;\s*\n\^\.\.\.\.\.\.\.\.\.\.\.\.\.\.\.\.\.\.\.\^/
);
});
it("is invoked when lexer finds an epilogue that's not parsable as JavaScript", function () {
var dict = [
'%%',
'"a" %{ return true; %}',
'"b" %{ return 1; %}',
'%%',
'**This is gibberish!**',
].join('\n');
assert.throws(function () {
var lexer = new RegExpLexer(dict, null, null, {
dumpSourceCodeOnFailure: false
});
},
Error,
/The extra lexer module code section \(a\.k\.a\. 'epilogue'\) does not compile[^]*?\n Erroneous area:\n1: %%\n2: "a" %\{ return true; %\}\n3: "b" %\{ return 1; %\}\n4: %%\n\^\.\.\.\.\^\n5: \*\*This is gibberish!\*\*\n\^\.\.\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^/
);
});
it("is invoked when lexer finds a %code section that's not parsable as JavaScript", function () {
var dict = [
'%%',
'"a" %{ return true; %}',
'"b" %{ return 1; %}',
'%code bugger %{ **This is gibberish!** %}',
].join('\n');
assert.throws(function () {
var lexer = new RegExpLexer(dict, null, null, {
dumpSourceCodeOnFailure: false
});
},
Error,
/There's probably an error in one or more of your lexer regex rules[^]*?\n Erroneous code:\n1: %%\n2: "a" %\{ return true; %\}\n3: "b" %\{ return 1; %\}\n4: %code bugger %\{ \*\*This is gibberish!\*\* %\}\n\^\.\.\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\^\n[^]*?\n Technical error report:\nParse error on line 4:[^]*?Expecting end of input, [^]*? got unexpected "INIT_CODE"/
);
});
});
//xdescribe("Error Detection and Diagnosis in JISON-LEX Tool", function () {
describe("Test Lexer Grammars", function () {
console.log('exec glob....', __dirname);
var testset = globby.sync([
__dirname + '/specs/*.jison',
__dirname + '/specs/*.json5',
'!'+ __dirname + '/specs/*-ref.json5',
__dirname + '/specs/*.js',
]);
var original_cwd = process.cwd();
testset = testset.sort().map(function (filepath) {
// Get document, or throw exception on error
try {
console.log('Lexer Grammar file:', filepath.replace(/^.*?\/specs\//, ''));
var spec;
var header;
var extra;
if (filepath.match(/\.js$/)) {
spec = require(filepath);
var hdrspec = fs.readFileSync(filepath, 'utf8').replace(/\r\n|\r/g, '\n');
// extract the top comment, which carries the title, etc. metadata:
header = hdrspec.substr(0, hdrspec.indexOf('\n\n') + 1);
} else {
spec = fs.readFileSync(filepath, 'utf8').replace(/\r\n|\r/g, '\n');
// extract the top comment, which carries the title, etc. metadata:
header = spec.substr(0, spec.indexOf('\n\n') + 1);
}
// then strip off the comment prefix for every line:
header = header.replace(/^\/\/ ?/gm, '').replace(/\n...\n[^]*$/, function (m) {
extra = m;
return '';
});
var doc = yaml.safeLoad(header, {
filename: filepath,
});
var refOut;
try {
refOut = fs.readFileSync(filepath + '-ref.json5', 'utf8').replace(/\r\n|\r/g, '\n');
refOut = JSON5.parse(refOut);
} catch (ex) {
refOut = null;
}
return {
path: filepath,
spec: spec,
meta: doc,
metaExtra: extra,
ref: refOut
};
} catch (ex) {
console.log(ex);
throw ex;
}
return false;
})
.filter(function (info) {
return !!info;
});
var original_cwd = process.cwd();
testset.forEach(function (filespec) {
// process this file:
var title = (filespec.meta ? filespec.meta.title : null);
// and create a test for it:
it('test: ' + filespec.path.replace(/^.*?\/specs\//, '') + (title ? ' :: ' + title : ''), function () {
var tokens = [];
var i = 0;
var lexerSourceCode;
try {
// Change CWD to the directory where the source grammar resides: this helps us properly
// %include any files mentioned in the grammar with relative paths:
process.chdir(__dirname + '/specs');
var lexer = new RegExpLexer(filespec.spec, (filespec.meta.test_input || 'a b c'), null, {
json: true, // input MAY be JSON/JSON5 format OR JISON LEX format!
showSource: function (lexer, source, options) {
lexerSourceCode = {
sourceCode: source,
options: options,
};
}
});
var countDown = 4;
for (i = 0; i < 1000; i++) {
var tok = lexer.lex();
tokens.push(tok);
tokens.push(lexer.yytext);
tokens.push(lexer.yylloc);
if (tok === lexer.EOF) {
// and make sure EOF stays EOF, i.e. continued invocation of `lex()` will only
// produce more EOF tokens at the same location:
countDown--;
if (countDown <= 0) {
break;
}
}
}
} catch (ex) {
// save the error:
tokens.push(-1);
tokens.push(ex.message);
tokens.push(ex.stack);
tokens.push(ex);
} finally {
process.chdir(original_cwd);
}
// also store the number of tokens we received:
tokens.unshift(i);
Eif (lexerSourceCode) {
tokens.push(lexerSourceCode);
}
// either we check/test the correctness of the collected input, iff there's
// a reference provided, OR we create the reference file for future use:
Eif (filespec.ref) {
// make sure we postprocess the lexer spec as we did when we created the reference template:
tokens = JSON5.parse(JSON5.stringify(tokens, null, 2));
assert.deepEqual(tokens, filespec.ref);
} else {
var refOut = JSON5.stringify(tokens, null, 2);
fs.writeFileSync(filespec.path + '-ref.json5', refOut, 'utf8');
}
});
});
});
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