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fatfinger.js
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/*
FatFingerJS
https://github.com/rottytooth/FatFingerJS
http://esoteric.codes
http://danieltemkin.com
*/
var fatfinger = {};
fatfinger.CompileException = function(message) {
this.message = message;
};
// globals that JsLint doesn't like for whatever reason
fatfinger.JslintGlobalList = ["window","browser"];
fatfinger.JslintBlindSpot = function(text) {
// these are for globals that jslint doesn't like (such as window)
if (fatfinger.JslintGlobalList.indexOf(text) > -1) {
return true;
}
return false;
}
// from parse-js.js (uglify)
fatfinger.array_to_hash = function(a) {
var ret = {};
for (var i = 0; i < a.length; ++i)
ret[a[i]] = true;
return ret;
};
//FIXME: can we replace these with something es6-friendly, perhaps from esprima?
fatfinger.Keywords = fatfinger.array_to_hash([
"break",
"case",
"catch",
"const",
"continue",
"debugger",
"default",
"delete",
"do",
"else",
"finally",
"for",
"function",
"if",
"in",
"instanceof",
"new",
"return",
"switch",
"throw",
"try",
"typeof",
"var",
"void",
"while",
"with"
]);
fatfinger.Keywords_Atom = fatfinger.array_to_hash([
"false",
"null",
"true",
"undefined"
]);
;// jslint.js
// 2017-04-10
// Copyright (c) 2015 Douglas Crockford (www.JSLint.com)
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// The Software shall be used for Good, not Evil.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
// jslint(source, option_object, global_array) is a function that takes 3
// arguments. The second two arguments are optional.
// source A text to analyze, a string or an array of strings.
// option_object An object whose keys correspond to option names.
// global_array An array of strings containing global variables that
// the file is allowed readonly access.
// jslint returns an object containing its results. The object contains a lot
// of valuable information. It can be used to generate reports. The object
// contains:
// directives: an array of directive comment tokens.
// edition: the version of JSLint that did the analysis.
// exports: the names exported from the module.
// froms: an array of strings representing each of the imports.
// functions: an array of objects that represent all of the functions
// declared in the file.
// global: an object representing the global object. Its .context property
// is an object containing a property for each global variable.
// id: "(JSLint)"
// json: true if the file is a JSON text.
// lines: an array of strings, the source.
// module: true if an import or export statement was used.
// ok: true if no warnings were generated. This is what you want.
// option: the option argument.
// property: a property object.
// stop: true if JSLint was unable to finish. You don't want this.
// tokens: an array of objects representing the tokens in the file.
// tree: the token objects arranged in a tree.
// warnings: an array of warning objects. A warning object can contain:
// name: "JSLintError"
// column: A column number in the file.
// line: A line number in the file.
// code: A warning code string.
// message: The warning message string.
// a: Exhibit A.
// b: Exhibit B.
// c: Exhibit C.
// d: Exhibit D.
// jslint works in several phases. In any of these phases, errors might be
// found. Sometimes JSLint is able to recover from an error and continue
// parsing. In some cases, it cannot and will stop early. If that should happen,
// repair your code and try again.
// Phases:
// 1. If the source is a single string, split it into an array of strings.
// 2. Turn the source into an array of tokens.
// 3. Furcate the tokens into a parse tree.
// 4. Walk the tree, traversing all of the nodes of the tree. It is a
// recursive traversal. Each node may be processed on the way down
// (preaction) and on the way up (postaction).
// 5. Check the whitespace between the tokens.
// jslint can also examine JSON text. It decides that a file is JSON text if
// the first token is "[" or "{". Processing of JSON text is much simpler than
// the processing of JavaScript programs. Only the first three phases are
// required.
// WARNING: JSLint will hurt your feelings.
/*jslint bitwise*/
/*property
a, and, arity, assign, b, bad_assignment_a, bad_directive_a, bad_get,
bad_module_name_a, bad_option_a, bad_property_a, bad_set, bitwise, block,
body, browser, c, calls, catch, charAt, charCodeAt, closer, closure, code,
column, complex, concat, constant, context, couch, create, d, dead,
default, devel, directive, directives, disrupt, dot, duplicate_a, edition,
ellipsis, else, empty_block, es6, escape_mega, eval, every, expected_a,
expected_a_at_b_c, expected_a_b, expected_a_b_from_c_d,
expected_a_before_b, expected_digits_after_a, expected_four_digits,
expected_identifier_a, expected_line_break_a_b, expected_regexp_factor_a,
expected_space_a_b, expected_statements_a, expected_string_a,
expected_type_string_a, exports, expression, extra, finally, flag, for,
forEach, free, from, froms, fud, fudge, function, function_in_loop,
functions, g, global, i, id, identifier, import, inc, indexOf, infix_in,
init, initial, isArray, isNaN, join, json, keys, label, label_a, lbp, led,
length, level, line, lines, live, loop, m, margin, match, maxerr, maxlen,
message, misplaced_a, misplaced_directive_a, missing_browser, missing_m,
module, multivar, naked_block, name, names, nested_comment, new, node,
not_label_a, nr, nud, number_isNaN, ok, open, option, out_of_scope_a,
parameters, pop, property, push, qmark, quote, redefinition_a_b, replace,
required_a_optional_b, reserved_a, right, role, search, signature, single,
slice, some, sort, split, statement, stop, strict, subscript_a, switch,
test, this, thru, toString, todo_comment, tokens, too_long, too_many,
too_many_digits, tree, try, type, u, unclosed_comment, unclosed_mega,
unclosed_string, undeclared_a, unexpected_a, unexpected_a_after_b,
unexpected_a_before_b, unexpected_at_top_level_a, unexpected_char_a,
unexpected_comment, unexpected_directive_a, unexpected_expression_a,
unexpected_label_a, unexpected_parens, unexpected_space_a_b,
unexpected_statement_a, unexpected_trailing_space, unexpected_typeof_a,
uninitialized_a, unreachable_a, unregistered_property_a, unsafe, unused_a,
use_double, use_spaces, use_strict, used, value, var_loop, var_switch,
variable, warning, warnings, weird_condition_a, weird_expression_a,
weird_loop, weird_relation_a, white, wrap_assignment, wrap_condition,
wrap_immediate, wrap_parameter, wrap_regexp, wrap_unary, wrapped, writable,
y
*/
var jslint = (function JSLint() {
"use strict";
function empty() {
// The empty function produces a new empty object that inherits nothing. This is
// much better than {} because confusions around accidental method names like
// "constructor" are completely avoided.
return Object.create(null);
}
function populate(object, array, value) {
// Augment an object by taking property names from an array of strings.
array.forEach(function (name) {
object[name] = value;
});
}
var allowed_option = {
// These are the options that are recognized in the option object or that may
// appear in a /*jslint*/ directive. Most options will have a boolean value,
// usually true. Some options will also predefine some number of global
// variables.
bitwise: true,
browser: [
"Audio",
"clearInterval",
"clearTimeout",
"document",
"event",
"FileReader",
"FormData",
"history",
"Image",
"localStorage",
"location",
"name",
"navigator",
"Option",
"screen",
"sessionStorage",
"setInterval",
"setTimeout",
"Storage",
"XMLHttpRequest"
],
couch: [
"emit", "getRow", "isArray", "log", "provides", "registerType",
"require", "send", "start", "sum", "toJSON"
],
devel: [
"alert", "confirm", "console", "prompt"
],
es6: [
"ArrayBuffer", "DataView", "Float32Array", "Float64Array",
"Generator", "GeneratorFunction", "Int8Array", "Int16Array",
"Int32Array", "Intl", "Map", "Promise", "Proxy", "Reflect",
"Set", "Symbol", "System", "Uint8Array", "Uint8ClampedArray",
"Uint16Array", "Uint32Array", "WeakMap", "WeakSet"
],
eval: true,
for: true,
fudge: true,
maxerr: 10000,
maxlen: 10000,
multivar: true,
node: [
"Buffer", "clearImmediate", "clearInterval", "clearTimeout",
"console", "exports", "global", "module", "process", "querystring",
"require", "setImmediate", "setInterval", "setTimeout",
"__dirname", "__filename"
],
single: true,
this: true,
white: true
};
var spaceop = {
// This is the set of infix operators that require a space on each side.
"!=": true,
"!==": true,
"%": true,
"%=": true,
"&": true,
"&=": true,
"&&": true,
"*": true,
"*=": true,
"+=": true,
"-=": true,
"/": true,
"/=": true,
"<": true,
"<=": true,
"<<": true,
"<<=": true,
"=": true,
"==": true,
"===": true,
"=>": true,
">": true,
">=": true,
">>": true,
">>=": true,
">>>": true,
">>>=": true,
"^": true,
"^=": true,
"|": true,
"|=": true,
"||": true
};
var bitwiseop = {
// These are the bitwise operators.
"~": true,
"^": true,
"^=": true,
"&": true,
"&=": true,
"|": true,
"|=": true,
"<<": true,
"<<=": true,
">>": true,
">>=": true,
">>>": true,
">>>=": true
};
var opener = {
// The open and close pairs.
"(": ")", // paren
"[": "]", // bracket
"{": "}", // brace
"${": "}" // mega
};
var relationop = {
// The relational operators.
"!=": true,
"!==": true,
"==": true,
"===": true,
"<": true,
"<=": true,
">": true,
">=": true
};
var standard = [
// These are the globals that are provided by the ES5 language standard.
"Array", "Boolean", "Date", "decodeURI", "decodeURIComponent",
"encodeURI", "encodeURIComponent", "Error", "EvalError", "isFinite",
"JSON", "Math", "Number", "Object", "parseInt", "parseFloat",
"RangeError", "ReferenceError", "RegExp", "String", "SyntaxError",
"TypeError", "URIError"
];
var bundle = {
// The bundle contains the raw text messages that are generated by jslint. It
// seems that they are all error messages and warnings. There are no "Atta
// boy!" or "You are so awesome!" messages. There is no positive reinforcement
// or encouragement. This relentless negativity can undermine self-esteem and
// wound the inner child. But if you accept it as sound advice rather than as
// personal criticism, it can make your programs better.
and: "The '&&' subexpression should be wrapped in parens.",
bad_assignment_a: "Bad assignment to '{a}'.",
bad_directive_a: "Bad directive '{a}'.",
bad_get: "A get function takes no parameters.",
bad_module_name_a: "Bad module name '{a}'.",
bad_option_a: "Bad option '{a}'.",
bad_property_a: "Bad property name '{a}'.",
bad_set: "A set function takes one parameter.",
duplicate_a: "Duplicate '{a}'.",
empty_block: "Empty block.",
es6: "Unexpected ES6 feature '{a}'.",
escape_mega: "Unexpected escapement in mega literal.",
expected_a: "Expected '{a}'.",
expected_a_at_b_c: "Expected '{a}' at column {b}, not column {c}.",
expected_a_b: "Expected '{a}' and instead saw '{b}'.",
expected_a_b_from_c_d: "Expected '{a}' to match '{b}' from line {c} and instead saw '{d}'.",
expected_a_before_b: "Expected '{a}' before '{b}'.",
expected_digits_after_a: "Expected digits after '{a}'.",
expected_four_digits: "Expected four digits after '\\u'.",
expected_identifier_a: "Expected an identifier and instead saw '{a}'.",
expected_line_break_a_b: "Expected a line break between '{a}' and '{b}'.",
expected_regexp_factor_a: "Expected a regexp factor and instead saw '{a}'.",
expected_space_a_b: "Expected one space between '{a}' and '{b}'.",
expected_statements_a: "Expected statements before '{a}'.",
expected_string_a: "Expected a string and instead saw '{a}'.",
expected_type_string_a: "Expected a type string and instead saw '{a}'.",
function_in_loop: "Don't make functions within a loop.",
infix_in: "Unexpected 'in'. Compare with undefined, or use the hasOwnProperty method instead.",
isNaN: "Use the isNaN function to compare with NaN.",
label_a: "'{a}' is a statement label.",
misplaced_a: "Place '{a}' at the outermost level.",
misplaced_directive_a: "Place the '/*{a}*/' directive before the first statement.",
missing_browser: "/*global*/ requires the Assume a browser option.",
missing_m: "Expected 'm' flag on a multiline regular expression.",
naked_block: "Naked block.",
nested_comment: "Nested comment.",
not_label_a: "'{a}' is not a label.",
number_isNaN: "Use Number.isNaN function to compare with NaN.",
out_of_scope_a: "'{a}' is out of scope.",
redefinition_a_b: "Redefinition of '{a}' from line {b}.",
required_a_optional_b: "Required parameter '{a}' after optional parameter '{b}'.",
reserved_a: "Reserved name '{a}'.",
subscript_a: "['{a}'] is better written in dot notation.",
todo_comment: "Unexpected TODO comment.",
too_long: "Line too long.",
too_many: "Too many warnings.",
too_many_digits: "Too many digits.",
unclosed_comment: "Unclosed comment.",
unclosed_mega: "Unclosed mega literal.",
unclosed_string: "Unclosed string.",
undeclared_a: "Undeclared '{a}'.",
unexpected_a: "Unexpected '{a}'.",
unexpected_a_after_b: "Unexpected '{a}' after '{b}'.",
unexpected_a_before_b: "Unexpected '{a}' before '{b}'.",
unexpected_at_top_level_a: "Expected '{a}' to be in a function.",
unexpected_char_a: "Unexpected character '{a}'.",
unexpected_comment: "Unexpected comment.",
unexpected_directive_a: "When using modules, don't use directive '/*{a}'.",
unexpected_expression_a: "Unexpected expression '{a}' in statement position.",
unexpected_label_a: "Unexpected label '{a}'.",
unexpected_parens: "Don't wrap function literals in parens.",
unexpected_space_a_b: "Unexpected space between '{a}' and '{b}'.",
unexpected_statement_a: "Unexpected statement '{a}' in expression position.",
unexpected_trailing_space: "Unexpected trailing space.",
unexpected_typeof_a: "Unexpected 'typeof'. Use '===' to compare directly with {a}.",
uninitialized_a: "Uninitialized '{a}'.",
unreachable_a: "Unreachable '{a}'.",
unregistered_property_a: "Unregistered property name '{a}'.",
unsafe: "Unsafe character '{a}'.",
unused_a: "Unused '{a}'.",
use_double: "Use double quotes, not single quotes.",
use_spaces: "Use spaces, not tabs.",
use_strict: "This function needs a \"use strict\" pragma.",
var_loop: "Don't declare variables in a loop.",
var_switch: "Don't declare variables in a switch.",
weird_condition_a: "Weird condition '{a}'.",
weird_expression_a: "Weird expression '{a}'.",
weird_loop: "Weird loop.",
weird_relation_a: "Weird relation '{a}'.",
wrap_assignment: "Don't wrap assignment statements in parens.",
wrap_condition: "Wrap the condition in parens.",
wrap_immediate: "Wrap an immediate function invocation in " +
"parentheses to assist the reader in understanding that the " +
"expression is the result of a function, and not the " +
"function itself.",
wrap_parameter: "Wrap the parameter in parens.",
wrap_regexp: "Wrap this regexp in parens to avoid confusion.",
wrap_unary: "Wrap the unary expression in parens."
};
// Regular expression literals:
// supplant {variables}
var rx_supplant = /\{([^{}]*)\}/g;
// carriage return, carriage return linefeed, or linefeed
var rx_crlf = /\n|\r\n?/;
// unsafe characters that are silently deleted by one or more browsers
var rx_unsafe = /[\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/;
// identifier
var rx_identifier = /^([a-zA-Z_$][a-zA-Z0-9_$]*)$/;
var rx_module = /^[a-zA-Z0-9_$:.@\-\/]+$/;
var rx_bad_property = /^_|\$|Sync\$|_$/;
// star slash
var rx_star_slash = /\*\//;
// slash star
var rx_slash_star = /\/\*/;
// slash star or ending slash
var rx_slash_star_or_slash = /\/\*|\/$/;
// uncompleted work comment
var rx_todo = /\b(?:todo|TO\s?DO|HACK)\b/;
// tab
var rx_tab = /\t/g;
// directive
var rx_directive = /^(jslint|property|global)\s+(.*)$/;
var rx_directive_part = /^([a-zA-Z$_][a-zA-Z0-9$_]*)\s*(?::\s*(true|false|[0-9]+)\s*)?(?:,\s*)?(.*)$/;
// token (sorry it is so long)
var rx_token = /^((\s+)|([a-zA-Z_$][a-zA-Z0-9_$]*)|[(){}\[\]?,:;'"~`]|=(?:==?|>)?|\.+|\/[=*\/]?|\*[\/=]?|\+(?:=|\++)?|-(?:=|-+)?|[\^%]=?|&[&=]?|\|[|=]?|>{1,3}=?|<<?=?|!={0,2}|(0|[1-9][0-9]*))(.*)$/;
var rx_digits = /^([0-9]+)(.*)$/;
var rx_hexs = /^([0-9a-fA-F]+)(.*)$/;
var rx_octals = /^([0-7]+)(.*)$/;
var rx_bits = /^([01]+)(.*)$/;
// mega
var rx_mega = /[`\\]|\$\{/;
// indentation
var rx_colons = /^(.*)\?([:.]*)$/;
var rx_dot = /\.$/;
// JSON number
var rx_JSON_number = /^-?\d+(?:\.\d*)?(?:e[\-+]?\d+)?$/i;
// initial cap
var rx_cap = /^[A-Z]/;
function is_letter(string) {
return (string >= "a" && string <= "z\uffff") ||
(string >= "A" && string <= "Z\uffff");
}
function supplant(string, object) {
return string.replace(rx_supplant, function (found, filling) {
var replacement = object[filling];
return (replacement !== undefined)
? replacement
: found;
});
}
var anon = "anonymous"; // The guessed name for anonymous functions.
var blockage; // The current block.
var block_stack; // The stack of blocks.
var declared_globals; // The object containing the global declarations.
var directives; // The directive comments.
var directive_mode; // true if directives are still allowed.
var early_stop; // true if JSLint cannot finish.
var exports; // The exported names and values.
var froms; // The array collecting all import-from strings.
var fudge; // true if the natural numbers start with 1.
var functionage; // The current function.
var functions; // The array containing all of the functions.
var global; // The global object; the outermost context.
var json_mode; // true if parsing JSON.
var lines; // The array containing source lines.
var module_mode; // true if import or export was used.
var next_token; // The next token to be examined in the parse.
var option; // The options parameter.
var property; // The object containing the tallied property names.
var mega_mode; // true if currently parsing a megastring literal.
var stack; // The stack of functions.
var syntax; // The object containing the parser.
var token; // The current token being examined in the parse.
var token_nr; // The number of the next token.
var tokens; // The array of tokens.
var tenure; // The predefined property registry.
var tree; // The abstract parse tree.
var var_mode; // true if using var; false if using let.
var warnings; // The array collecting all generated warnings.
// Error reportage functions:
function artifact(the_token) {
// Return a string representing an artifact.
if (the_token === undefined) {
the_token = next_token;
}
return (the_token.id === "(string)" || the_token.id === "(number)")
? String(the_token.value)
: the_token.id;
}
function artifact_line(the_token) {
// Return the fudged line number of an artifact.
if (the_token === undefined) {
the_token = next_token;
}
return the_token.line + fudge;
}
function artifact_column(the_token) {
// Return the fudged column number of an artifact.
if (the_token === undefined) {
the_token = next_token;
}
return the_token.from + fudge;
}
function warn_at(code, line, column, a, b, c, d) {
// Report an error at some line and column of the program. The warning object
// resembles an exception.
var warning = { // ~~
name: "JSLintError",
column: column,
line: line,
code: code
};
if (a !== undefined) {
warning.a = a;
}
if (b !== undefined) {
warning.b = b;
}
if (c !== undefined) {
warning.c = c;
}
if (d !== undefined) {
warning.d = d;
}
warning.message = supplant(bundle[code] || code, warning);
warnings.push(warning);
return (
typeof option.maxerr === "number" &&
warnings.length === option.maxerr
) ? stop_at("too_many", line, column)
: warning;
}
function stop_at(code, line, column, a, b, c, d) {
// Same as warn_at, except that it stops the analysis.
throw warn_at(code, line, column, a, b, c, d);
}
function warn(code, the_token, a, b, c, d) {
// Same as warn_at, except the warning will be associated with a specific token.
// If there is already a warning on this token, suppress the new one. It is
// likely that the first warning will be the most meaningful.
if (the_token === undefined) {
the_token = next_token;
}
if (the_token.warning === undefined) {
the_token.warning = warn_at(
code,
the_token.line,
the_token.from,
a || artifact(the_token),
b,
c,
d
);
return the_token.warning;
}
}
function stop(code, the_token, a, b, c, d) {
// Similar to warn and stop_at. If the token already had a warning, that
// warning will be replaced with this new one. It is likely that the stopping
// warning will be the more meaningful.
if (the_token === undefined) {
the_token = next_token;
}
delete the_token.warning;
throw warn(code, the_token, a, b, c, d);
}
// Tokenize:
function tokenize(source) {
// tokenize takes a source and produces from it an array of token objects.
// JavaScript is notoriously difficult to tokenize because of the horrible
// interactions between automatic semicolon insertion, regular expression
// literals, and now megastring literals. JSLint benefits from eliminating
// automatic semicolon insertion and nested megastring literals, which allows
// full tokenization to precede parsing.
// If the source is not an array, then it is split into lines at the
// carriage return/linefeed.
lines = (Array.isArray(source))
? source
: source.split(rx_crlf);
tokens = [];
var char; // a popular character
var column = 0; // the column number of the next character
var first; // the first token
var from; // the starting column number of the token
var line = -1; // the line number of the next character
var nr = 0; // the next token number
var previous = global; // the previous token including comments
var prior = global; // the previous token excluding comments
var mega_from; // the starting column of megastring
var mega_line; // the starting line of megastring
var snippet; // a piece of string
var source_line; // the current line source string
function next_line() {
// Put the next line of source in source_line. If the line contains tabs,
// replace them with spaces and give a warning. Also warn if the line contains
// unsafe characters or is too damn long.
var at;
column = 0;
line += 1;
source_line = lines[line];
if (source_line !== undefined) {
at = source_line.search(rx_tab);
if (at >= 0) {
if (!option.white) {
warn_at("use_spaces", line, at + 1);
}
source_line = source_line.replace(rx_tab, " ");
}
at = source_line.search(rx_unsafe);
if (at >= 0) {
warn_at(
"unsafe",
line,
column + at,
"U+" + source_line.charCodeAt(at).toString(16)
);
}
if (option.maxlen && option.maxlen < source_line.length) {
warn_at("too_long", line, source_line.length);
} else if (!option.white && source_line.slice(-1) === " ") {
warn_at(
"unexpected_trailing_space",
line,
source_line.length - 1
);
}
}
return source_line;
}
// Most tokens, including the identifiers, operators, and punctuators, can be
// found with a regular expression. Regular expressions cannot correctly match
// regular expression literals, so we will match those the hard way. String
// literals and number literals can be matched by regular expressions, but they
// don't provide good warnings. The functions snip, next_char, prev_char,
// some_digits, and escape help in the parsing of literals.
function snip() {
// Remove the last character from snippet.
snippet = snippet.slice(0, -1);
}
function next_char(match) {
// Get the next character from the source line. Remove it from the source_line,
// and append it to the snippet. Optionally check that the previous character
// matched an expected value.
if (match !== undefined && char !== match) {
return stop_at(
(char === "")
? "expected_a"
: "expected_a_b",
line,
column - 1,
match,
char
);
}
if (source_line) {
char = source_line.charAt(0);
source_line = source_line.slice(1);
snippet += char;
} else {
char = "";
snippet += " ";
}
column += 1;
return char;
}
function back_char() {
// Back up one character by moving a character from the end of the snippet to
// the front of the source_line.
if (snippet) {
char = snippet.slice(-1);
source_line = char + source_line;
column -= 1;
snip();
} else {
char = "";
}
return char;
}
function some_digits(rx, quiet) {
var result = source_line.match(rx);
if (result) {
char = result[1];
column += char.length;
source_line = result[2];
snippet += char;
} else {
char = "";
if (!quiet) {
warn_at(
"expected_digits_after_a",
line,
column,
snippet
);
}
}
return char.length;
}
function escape(extra) {
switch (next_char("\\")) {
case "\\":
case "/":
case "b":
case "f":
case "n":
case "r":
case "t":
break;
case "u":
if (next_char("u") === "{") {
if (json_mode) {
warn_at("unexpected_a", line, column - 1, char);
}
if (some_digits(rx_hexs) > 5) {
warn_at("too_many_digits", line, column - 1);
}
if (!option.es6) {
warn_at("es6", line, column, "u{");
}
if (next_char() !== "}") {
stop_at("expected_a_before_b", line, column, "}", char);
}
next_char();
return;
}
back_char();
if (some_digits(rx_hexs, true) < 4) {
warn_at("expected_four_digits", line, column - 1);
}
break;
case "":
return stop_at("unclosed_string", line, column);
default:
if (!extra || extra.indexOf(char) < 0) {
warn_at(
"unexpected_a_before_b",
line,
column - 2,
"\\",
char
);
}
}
next_char();
}
function make(id, value, identifier) {
// Make the token object and append it to the tokens list.
var the_token = {
from: from,
id: id,
identifier: !!identifier,
line: line,
nr: nr,
thru: column
};
tokens[nr] = the_token;
nr += 1;
// Directives must appear before the first statement.
if (id !== "(comment)" && id !== ";") {
directive_mode = false;
}
// If the token is to have a value, give it one.
if (value !== undefined) {
the_token.value = value;
}
// If this token is an identifier that touches a preceding number, or
// a "/", comment, or regular expression literal that touches a preceding
// comment or regular expression literal, then give a missing space warning.
// This warning is not suppressed by option.white.
if (
previous.line === line &&
previous.thru === from &&
(
(id === "(comment)" || id === "(regexp)" || id === "/") &&
(
previous.id === "(comment)" ||
previous.id === "(regexp)"
)
)
) {
warn(
"expected_space_a_b",
the_token,
artifact(previous),
artifact(the_token)
);
}
if (previous.id === "." && id === "(number)") {
warn("expected_a_before_b", previous, "0", ".");
}
if (prior.id === "." && the_token.identifier) {
the_token.dot = true;
}
// The previous token is used to detect adjacency problems.
previous = the_token;
// The prior token is a previous token that was not a comment. The prior token
// is used to disambiguate "/", which can mean division or regular expression
// literal.
if (previous.id !== "(comment)") {
prior = previous;
}
return the_token;
}
function parse_directive(the_comment, body) {
// JSLint recognizes three directives that can be encoded in comments. This
// function processes one item, and calls itself recursively to process the
// next one.
var result = body.match(rx_directive_part);
if (result) {
var allowed;
var name = result[1];
var value = result[2];
switch (the_comment.directive) {
case "jslint":
allowed = allowed_option[name];
switch (typeof allowed) {
case "boolean":
case "object":
switch (value) {
case "true":
case "":
case undefined:
option[name] = true;
if (Array.isArray(allowed)) {
populate(declared_globals, allowed, false);
}
break;
case "false":
option[name] = false;
break;
default:
warn(
"bad_option_a",
the_comment,
name + ":" + value
);
}
break;
case "number":
if (isFinite(+value)) {
option[name] = +value;
} else {
warn(
"bad_option_a",
the_comment,
name + ":" + value
);
}
break;
default:
warn("bad_option_a", the_comment, name);
}
break;
case "property":
if (tenure === undefined) {
tenure = empty();
}
tenure[name] = true;
break;
case "global":
if (value) {
warn("bad_option_a", the_comment, name + ":" + value);
}
declared_globals[name] = false;