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load(libdir + "asserts.js");
// helper functions
function Disjunction(alternatives) {
return{
type: "Disjunction",
alternatives: alternatives
};
}
function Alternative(nodes) {
return {
type: "Alternative",
nodes: nodes
};
}
function Empty() {
return {
type: "Empty"
};
}
function Text(elements) {
return {
type: "Text",
elements: elements
};
}
function Assertion(type) {
return {
type: "Assertion",
assertion_type: type
};
}
function Atom(data) {
return {
type: "Atom",
data: data
};
}
const kInfinity = 0x7FFFFFFF;
function Quantifier(min, max, type, body) {
return {
type: "Quantifier",
min: min,
max: max,
quantifier_type: type,
body: body
};
}
function Lookahead(body) {
return {
type: "Lookahead",
is_positive: true,
body: body
};
}
function NegativeLookahead(body) {
return {
type: "Lookahead",
is_positive: false,
body: body
};
}
function BackReference(index) {
return {
type: "BackReference",
index: index
};
}
function CharacterClass(ranges) {
return {
type: "CharacterClass",
is_negated: false,
ranges: ranges.map(([from, to]) => ({ from ,to }))
};
}
function NegativeCharacterClass(ranges) {
return {
type: "CharacterClass",
is_negated: true,
ranges: ranges.map(([from, to]) => ({ from ,to }))
};
}
function Capture(index, body) {
return {
type: "Capture",
index: index,
body: body
};
}
function AllSurrogateAndCharacterClass(ranges) {
return Disjunction([
CharacterClass(ranges),
Alternative([
CharacterClass([["\uD800", "\uDBFF"]]),
NegativeLookahead(CharacterClass([["\uDC00", "\uDFFF"]]))
]),
Alternative([
Assertion("NOT_AFTER_LEAD_SURROGATE"),
CharacterClass([["\uDC00", "\uDFFF"]])
]),
Text([
CharacterClass([["\uD800", "\uDBFF"]]),
CharacterClass([["\uDC00", "\uDFFF"]])
])
]);
}
// testing functions
var all_flags = [
"",
"i",
"m",
"u",
"im",
"iu",
"mu",
"imu",
];
var no_unicode_flags = [
"",
"i",
"m",
"im",
];
var unicode_flags = [
"u",
"iu",
"mu",
"imu",
];
var no_multiline_flags = [
"",
"i",
"u",
"iu",
];
var multiline_flags = [
"m",
"im",
"mu",
"imu",
];
function test_flags(pattern, flags, match_only, expected) {
for (var flag of flags) {
assertDeepEq(parseRegExp(pattern, flag, match_only), expected);
}
}
function make_mix(tree) {
if (tree.type == "Atom") {
return Atom("X" + tree.data + "Y");
}
if (tree.type == "CharacterClass") {
return Text([
Atom("X"),
tree,
Atom("Y")
]);
}
if (tree.type == "Alternative") {
return Alternative([
Atom("X"),
...tree.nodes,
Atom("Y")
]);
}
return Alternative([
Atom("X"),
tree,
Atom("Y")
]);
}
function test_mix(pattern, flags, expected) {
test_flags(pattern, flags, false, expected);
test_flags("X" + pattern + "Y", flags, false, make_mix(expected));
}
function test(pattern, flags, expected) {
test_flags(pattern, flags, false, expected);
}
function test_match_only(pattern, flags, expected) {
test_flags(pattern, flags, true, expected);
}
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