You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1115 lines
35 KiB
JavaScript
1115 lines
35 KiB
JavaScript
(function() {
|
|
|
|
module("PEG.compiler");
|
|
|
|
function testWithVaryingTrackLineAndColumn(name, callback) {
|
|
test(
|
|
name + " (with trackLineAndColumn: false) ",
|
|
function() { callback({ trackLineAndColumn: false }); }
|
|
);
|
|
test(
|
|
name + " (with trackLineAndColumn: true) ",
|
|
function() { callback({ trackLineAndColumn: true }); }
|
|
);
|
|
}
|
|
|
|
testWithVaryingTrackLineAndColumn("choices", function(options) {
|
|
var parser = PEG.buildParser('start = "a" / "b" / "c"', options);
|
|
parses(parser, "a", "a");
|
|
parses(parser, "b", "b");
|
|
parses(parser, "c", "c");
|
|
doesNotParse(parser, "");
|
|
doesNotParse(parser, "ab");
|
|
doesNotParse(parser, "d");
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("sequences", function(options) {
|
|
var emptySequenceParser = PEG.buildParser('start = ', options);
|
|
parses(emptySequenceParser, "", []);
|
|
doesNotParse(emptySequenceParser, "abc");
|
|
|
|
var nonEmptySequenceParser = PEG.buildParser('start = "a" "b" "c"', options);
|
|
parses(nonEmptySequenceParser, "abc", ["a", "b", "c"]);
|
|
doesNotParse(nonEmptySequenceParser, "");
|
|
doesNotParse(nonEmptySequenceParser, "ab");
|
|
doesNotParse(nonEmptySequenceParser, "abcd");
|
|
doesNotParse(nonEmptySequenceParser, "efg");
|
|
|
|
/*
|
|
* Test that the parsing position returns after unsuccessful parsing of a
|
|
* sequence.
|
|
*/
|
|
var posTestParser = PEG.buildParser('start = ("a" "b") / "a"', options);
|
|
parses(posTestParser, "a", "a");
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("labels", function(options) {
|
|
var parser = PEG.buildParser('start = label:"a"', options);
|
|
parses(parser, "a", "a");
|
|
doesNotParse(parser, "b");
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("simple and", function(options) {
|
|
var parser = PEG.buildParser('start = "a" &"b" "b"', options);
|
|
parses(parser, "ab", ["a", "", "b"]);
|
|
doesNotParse(parser, "ac");
|
|
|
|
/*
|
|
* Test that the parsing position returns after successful parsing of a
|
|
* predicate is not needed, it is implicit in the tests above.
|
|
*/
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("simple not", function(options) {
|
|
var parser = PEG.buildParser('start = "a" !"b"', options);
|
|
parses(parser, "a", ["a", ""]);
|
|
doesNotParse(parser, "ab");
|
|
|
|
/*
|
|
* Test that the parsing position returns after successful parsing of a
|
|
* predicate.
|
|
*/
|
|
var posTestParser = PEG.buildParser('start = "a" !"b" "c"');
|
|
parses(posTestParser, "ac", ["a", "", "c"]);
|
|
});
|
|
|
|
test("semantic and (with trackLineAndColumn: false)", function() {
|
|
var options = { trackLineAndColumn: false };
|
|
|
|
var acceptingParser = PEG.buildParser(
|
|
'start = "a" &{ return true; } "b"',
|
|
options
|
|
);
|
|
parses(acceptingParser, "ab", ["a", "", "b"]);
|
|
|
|
var rejectingParser = PEG.buildParser(
|
|
'start = "a" &{ return false; } "b"',
|
|
options
|
|
);
|
|
doesNotParse(rejectingParser, "ab");
|
|
|
|
var singleElementUnlabeledParser = PEG.buildParser(
|
|
'start = "a" &{ return arguments.length === 1 && offset === 1; }',
|
|
options
|
|
);
|
|
parses(singleElementUnlabeledParser, "a", ["a", ""]);
|
|
|
|
var singleElementLabeledParser = PEG.buildParser([
|
|
'start = a:"a" &{',
|
|
' return arguments.length === 2',
|
|
' && offset === 1',
|
|
' && a === "a";',
|
|
' }'
|
|
].join("\n"), options);
|
|
parses(singleElementLabeledParser, "a", ["a", ""]);
|
|
|
|
var multiElementUnlabeledParser = PEG.buildParser(
|
|
'start = "a" "b" "c" &{ return arguments.length === 1 && offset === 3; }',
|
|
options
|
|
);
|
|
parses(multiElementUnlabeledParser, "abc", ["a", "b", "c", ""]);
|
|
|
|
var multiElementLabeledParser = PEG.buildParser([
|
|
'start = a:"a" "b" c:"c" &{',
|
|
' return arguments.length === 3',
|
|
' && offset === 3',
|
|
' && a === "a"',
|
|
' && c === "c";',
|
|
' }'
|
|
].join("\n"), options);
|
|
parses(multiElementLabeledParser, "abc", ["a", "b", "c", ""]);
|
|
|
|
var innerElementsUnlabeledParser = PEG.buildParser([
|
|
'start = "a"',
|
|
' ("b" "c" "d" &{ return arguments.length === 1 && offset === 4; })',
|
|
' "e"'
|
|
].join("\n"), options);
|
|
parses(innerElementsUnlabeledParser, "abcde", ["a", ["b", "c", "d", ""], "e"]);
|
|
|
|
var innerElementsLabeledParser = PEG.buildParser([
|
|
'start = "a"',
|
|
' (',
|
|
' b:"b" "c" d:"d" &{',
|
|
' return arguments.length === 3',
|
|
' && offset === 4',
|
|
' && b === "b"',
|
|
' && d === "d";',
|
|
' }',
|
|
' )',
|
|
' "e"'
|
|
].join("\n"), options);
|
|
parses(innerElementsLabeledParser, "abcde", ["a", ["b", "c", "d", ""], "e"]);
|
|
});
|
|
|
|
test("semantic and (with trackLineAndColumn: true)", function() {
|
|
var options = { trackLineAndColumn: true };
|
|
|
|
var acceptingParser = PEG.buildParser(
|
|
'start = "a" &{ return true; } "b"',
|
|
options
|
|
);
|
|
parses(acceptingParser, "ab", ["a", "", "b"]);
|
|
|
|
var rejectingParser = PEG.buildParser(
|
|
'start = "a" &{ return false; } "b"',
|
|
options
|
|
);
|
|
doesNotParse(rejectingParser, "ab");
|
|
|
|
var singleElementUnlabeledParser = PEG.buildParser([
|
|
'start = "a" &{',
|
|
' return arguments.length === 3',
|
|
' && offset === 1',
|
|
' && line === 1',
|
|
' && column === 2;',
|
|
' }'
|
|
].join("\n"), options);
|
|
parses(singleElementUnlabeledParser, "a", ["a", ""]);
|
|
|
|
var singleElementLabeledParser = PEG.buildParser([
|
|
'start = a:"a" &{',
|
|
' return arguments.length === 4',
|
|
' && offset === 1',
|
|
' && line === 1',
|
|
' && column === 2',
|
|
' && a === "a";',
|
|
' }'
|
|
].join("\n"), options);
|
|
parses(singleElementLabeledParser, "a", ["a", ""]);
|
|
|
|
var multiElementUnlabeledParser = PEG.buildParser([
|
|
'start = "a" "b" "c" &{',
|
|
' return arguments.length === 3',
|
|
' && offset === 3',
|
|
' && line === 1',
|
|
' && column === 4;',
|
|
' }'
|
|
].join("\n"), options);
|
|
parses(multiElementUnlabeledParser, "abc", ["a", "b", "c", ""]);
|
|
|
|
var multiElementLabeledParser = PEG.buildParser([
|
|
'start = a:"a" "b" c:"c" &{',
|
|
' return arguments.length === 5',
|
|
' && offset === 3',
|
|
' && line === 1',
|
|
' && column === 4',
|
|
' && a === "a"',
|
|
' && c === "c";',
|
|
' }'
|
|
].join("\n"), options);
|
|
parses(multiElementLabeledParser, "abc", ["a", "b", "c", ""]);
|
|
|
|
var innerElementsUnlabeledParser = PEG.buildParser([
|
|
'start = "a"',
|
|
' (',
|
|
' "b" "c" "d" &{',
|
|
' return arguments.length === 3',
|
|
' && offset === 4',
|
|
' && line === 1',
|
|
' && column === 5;',
|
|
' }',
|
|
' )',
|
|
' "e"'
|
|
].join("\n"), options);
|
|
parses(innerElementsUnlabeledParser, "abcde", ["a", ["b", "c", "d", ""], "e"]);
|
|
|
|
var innerElementsLabeledParser = PEG.buildParser([
|
|
'start = "a"',
|
|
' (',
|
|
' b:"b" "c" d:"d" &{',
|
|
' return arguments.length === 5',
|
|
' && offset === 4',
|
|
' && line === 1',
|
|
' && column === 5',
|
|
' && b === "b"',
|
|
' && d === "d";',
|
|
' }',
|
|
' )',
|
|
' "e"'
|
|
].join("\n"), options);
|
|
parses(innerElementsLabeledParser, "abcde", ["a", ["b", "c", "d", ""], "e"]);
|
|
|
|
var digitsParser = PEG.buildParser([
|
|
'{ var result; }',
|
|
'start = line (nl+ line)* { return result; }',
|
|
'line = thing (" "+ thing)*',
|
|
'thing = digit / mark',
|
|
'digit = [0-9]',
|
|
'mark = &{ result = [line, column]; return true; } "x"',
|
|
'nl = ("\\r" / "\\n" / "\\u2028" / "\\u2029")'
|
|
].join("\n"), options);
|
|
|
|
parses(digitsParser, "1\n2\n\n3\n\n\n4 5 x", [7, 5]);
|
|
|
|
/* Non-Unix newlines */
|
|
parses(digitsParser, "1\rx", [2, 1]); // Old Mac
|
|
parses(digitsParser, "1\r\nx", [2, 1]); // Windows
|
|
parses(digitsParser, "1\n\rx", [3, 1]); // mismatched
|
|
|
|
/* Strange newlines */
|
|
parses(digitsParser, "1\u2028x", [2, 1]); // line separator
|
|
parses(digitsParser, "1\u2029x", [2, 1]); // paragraph separator
|
|
});
|
|
|
|
test("semantic not (with trackLineAndColumn: false)", function() {
|
|
var options = { trackLineAndColumn: false };
|
|
|
|
var acceptingParser = PEG.buildParser(
|
|
'start = "a" !{ return false; } "b"',
|
|
options
|
|
);
|
|
parses(acceptingParser, "ab", ["a", "", "b"]);
|
|
|
|
var rejectingParser = PEG.buildParser(
|
|
'start = "a" !{ return true; } "b"',
|
|
options
|
|
);
|
|
doesNotParse(rejectingParser, "ab");
|
|
|
|
var singleElementUnlabeledParser = PEG.buildParser(
|
|
'start = "a" !{ return arguments.length !== 1 || offset !== 1; }',
|
|
options
|
|
);
|
|
parses(singleElementUnlabeledParser, "a", ["a", ""]);
|
|
|
|
var singleElementLabeledParser = PEG.buildParser([
|
|
'start = a:"a" !{',
|
|
' return arguments.length !== 2',
|
|
' || offset !== 1',
|
|
' || a !== "a";',
|
|
' }'
|
|
].join("\n"), options);
|
|
parses(singleElementLabeledParser, "a", ["a", ""]);
|
|
|
|
var multiElementUnlabeledParser = PEG.buildParser(
|
|
'start = "a" "b" "c" !{ return arguments.length !== 1 || offset !== 3; }',
|
|
options
|
|
);
|
|
parses(multiElementUnlabeledParser, "abc", ["a", "b", "c", ""]);
|
|
|
|
var multiElementLabeledParser = PEG.buildParser([
|
|
'start = a:"a" "b" c:"c" !{',
|
|
' return arguments.length !== 3',
|
|
' || offset !== 3',
|
|
' || a !== "a"',
|
|
' || c !== "c";',
|
|
' }'
|
|
].join("\n"), options);
|
|
parses(multiElementLabeledParser, "abc", ["a", "b", "c", ""]);
|
|
|
|
var innerElementsUnlabeledParser = PEG.buildParser([
|
|
'start = "a"',
|
|
' ("b" "c" "d" !{ return arguments.length !== 1 || offset !== 4; })',
|
|
' "e"'
|
|
].join("\n"), options);
|
|
parses(innerElementsUnlabeledParser, "abcde", ["a", ["b", "c", "d", ""], "e"]);
|
|
|
|
var innerElementsLabeledParser = PEG.buildParser([
|
|
'start = "a"',
|
|
' (',
|
|
' b:"b" "c" d:"d" !{',
|
|
' return arguments.length !== 3',
|
|
' || offset !== 4',
|
|
' || b !== "b"',
|
|
' || d !== "d";',
|
|
' }',
|
|
' )',
|
|
' "e"'
|
|
].join("\n"), options);
|
|
parses(innerElementsLabeledParser, "abcde", ["a", ["b", "c", "d", ""], "e"]);
|
|
});
|
|
|
|
test("semantic not (with trackLineAndColumn: true)", function() {
|
|
var options = { trackLineAndColumn: true };
|
|
|
|
var acceptingParser = PEG.buildParser(
|
|
'start = "a" !{ return false; } "b"',
|
|
options
|
|
);
|
|
parses(acceptingParser, "ab", ["a", "", "b"]);
|
|
|
|
var rejectingParser = PEG.buildParser(
|
|
'start = "a" !{ return true; } "b"',
|
|
options
|
|
);
|
|
doesNotParse(rejectingParser, "ab");
|
|
|
|
var singleElementUnlabeledParser = PEG.buildParser([
|
|
'start = "a" !{',
|
|
' return arguments.length !== 3',
|
|
' || offset !== 1',
|
|
' || line !== 1',
|
|
' || column !== 2;',
|
|
' }'
|
|
].join("\n"), options);
|
|
parses(singleElementUnlabeledParser, "a", ["a", ""]);
|
|
|
|
var singleElementLabeledParser = PEG.buildParser([
|
|
'start = a:"a" !{',
|
|
' return arguments.length !== 4',
|
|
' || offset !== 1',
|
|
' || line !== 1',
|
|
' || column !== 2',
|
|
' || a !== "a";',
|
|
' }'
|
|
].join("\n"), options);
|
|
parses(singleElementLabeledParser, "a", ["a", ""]);
|
|
|
|
var multiElementUnlabeledParser = PEG.buildParser([
|
|
'start = "a" "b" "c" !{',
|
|
' return arguments.length !== 3',
|
|
' || offset !== 3',
|
|
' || line !== 1',
|
|
' || column !== 4;',
|
|
' }'
|
|
].join("\n"), options);
|
|
parses(multiElementUnlabeledParser, "abc", ["a", "b", "c", ""]);
|
|
|
|
var multiElementLabeledParser = PEG.buildParser([
|
|
'start = a:"a" "b" c:"c" !{',
|
|
' return arguments.length !== 5',
|
|
' || offset !== 3',
|
|
' || line !== 1',
|
|
' || column !== 4',
|
|
' || a !== "a"',
|
|
' || c !== "c";',
|
|
' }'
|
|
].join("\n"), options);
|
|
parses(multiElementLabeledParser, "abc", ["a", "b", "c", ""]);
|
|
|
|
var innerElementsUnlabeledParser = PEG.buildParser([
|
|
'start = "a"',
|
|
' (',
|
|
' "b" "c" "d" !{',
|
|
' return arguments.length !== 3',
|
|
' || offset !== 4',
|
|
' || line !== 1',
|
|
' || column !== 5;',
|
|
' }',
|
|
' )',
|
|
' "e"'
|
|
].join("\n"), options);
|
|
parses(innerElementsUnlabeledParser, "abcde", ["a", ["b", "c", "d", ""], "e"]);
|
|
|
|
var innerElementsLabeledParser = PEG.buildParser([
|
|
'start = "a"',
|
|
' (',
|
|
' b:"b" "c" d:"d" !{',
|
|
' return arguments.length !== 5',
|
|
' || offset !== 4',
|
|
' || line !== 1',
|
|
' || column !== 5',
|
|
' || b !== "b"',
|
|
' || d !== "d";',
|
|
' }',
|
|
' )',
|
|
' "e"'
|
|
].join("\n"), options);
|
|
parses(innerElementsLabeledParser, "abcde", ["a", ["b", "c", "d", ""], "e"]);
|
|
|
|
var digitsParser = PEG.buildParser([
|
|
'{ var result; }',
|
|
'start = line (nl+ line)* { return result; }',
|
|
'line = thing (" "+ thing)*',
|
|
'thing = digit / mark',
|
|
'digit = [0-9]',
|
|
'mark = !{ result = [line, column]; return false; } "x"',
|
|
'nl = ("\\r" / "\\n" / "\\u2028" / "\\u2029")'
|
|
].join("\n"), options);
|
|
|
|
parses(digitsParser, "1\n2\n\n3\n\n\n4 5 x", [7, 5]);
|
|
|
|
/* Non-Unix newlines */
|
|
parses(digitsParser, "1\rx", [2, 1]); // Old Mac
|
|
parses(digitsParser, "1\r\nx", [2, 1]); // Windows
|
|
parses(digitsParser, "1\n\rx", [3, 1]); // mismatched
|
|
|
|
/* Strange newlines */
|
|
parses(digitsParser, "1\u2028x", [2, 1]); // line separator
|
|
parses(digitsParser, "1\u2029x", [2, 1]); // paragraph separator
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("optional expressions", function(options) {
|
|
var parser = PEG.buildParser('start = "a"?', options);
|
|
parses(parser, "", "");
|
|
parses(parser, "a", "a");
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("zero or more expressions", function(options) {
|
|
var parser = PEG.buildParser('start = "a"*', options);
|
|
parses(parser, "", []);
|
|
parses(parser, "a", ["a"]);
|
|
parses(parser, "aaa", ["a", "a", "a"]);
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("one or more expressions", function(options) {
|
|
var parser = PEG.buildParser('start = "a"+', options);
|
|
doesNotParse(parser, "");
|
|
parses(parser, "a", ["a"]);
|
|
parses(parser, "aaa", ["a", "a", "a"]);
|
|
});
|
|
|
|
test("actions (with trackLineAndColumn: false)", function() {
|
|
var options = { trackLineAndColumn: false };
|
|
|
|
var singleElementUnlabeledParser = PEG.buildParser(
|
|
'start = "a" { return arguments.length; }',
|
|
options
|
|
);
|
|
parses(singleElementUnlabeledParser, "a", 1);
|
|
|
|
var singleElementLabeledParser = PEG.buildParser(
|
|
'start = a:"a" { return [arguments.length, offset, a]; }',
|
|
options
|
|
);
|
|
parses(singleElementLabeledParser, "a", [2, 0, "a"]);
|
|
|
|
var multiElementUnlabeledParser = PEG.buildParser(
|
|
'start = "a" "b" "c" { return arguments.length; }',
|
|
options
|
|
);
|
|
parses(multiElementUnlabeledParser, "abc", 1);
|
|
|
|
var multiElementLabeledParser = PEG.buildParser(
|
|
'start = a:"a" "b" c:"c" { return [arguments.length, offset, a, c]; }',
|
|
options
|
|
);
|
|
parses(multiElementLabeledParser, "abc", [3, 0, "a", "c"]);
|
|
|
|
var innerElementsUnlabeledParser = PEG.buildParser(
|
|
'start = "a" ("b" "c" "d" { return arguments.length; }) "e"',
|
|
options
|
|
);
|
|
parses(innerElementsUnlabeledParser, "abcde", ["a", 1, "e"]);
|
|
|
|
var innerElementsLabeledParser = PEG.buildParser([
|
|
'start = "a"',
|
|
' (b:"b" "c" d:"d" { return [arguments.length, offset, b, d]; })',
|
|
' "e"'
|
|
].join("\n"), options);
|
|
parses(innerElementsLabeledParser, "abcde", ["a", [3, 1, "b", "d"], "e"]);
|
|
|
|
/*
|
|
* Test that the parsing position returns after successfull parsing of the
|
|
* action expression and action returning |null|.
|
|
*/
|
|
var posTestParser = PEG.buildParser(
|
|
'start = "a" { return null; } / "a"',
|
|
options
|
|
);
|
|
parses(posTestParser, "a", "a");
|
|
|
|
/* Test that the action is not called when its expression does not match. */
|
|
var notAMatchParser = PEG.buildParser(
|
|
'start = "a" { ok(false, "action got called when it should not be"); }',
|
|
options
|
|
);
|
|
doesNotParse(notAMatchParser, "b");
|
|
});
|
|
|
|
test("actions (with trackLineAndColumn: true)", function() {
|
|
var options = { trackLineAndColumn: true };
|
|
|
|
var singleElementUnlabeledParser = PEG.buildParser(
|
|
'start = "a" { return arguments.length; }',
|
|
options
|
|
);
|
|
parses(singleElementUnlabeledParser, "a", 3);
|
|
|
|
var singleElementLabeledParser = PEG.buildParser(
|
|
'start = a:"a" { return [arguments.length, offset, line, column, a]; }',
|
|
options
|
|
);
|
|
parses(singleElementLabeledParser, "a", [4, 0, 1, 1, "a"]);
|
|
|
|
var multiElementUnlabeledParser = PEG.buildParser(
|
|
'start = "a" "b" "c" { return arguments.length; }',
|
|
options
|
|
);
|
|
parses(multiElementUnlabeledParser, "abc", 3);
|
|
|
|
var multiElementLabeledParser = PEG.buildParser([
|
|
'start = a:"a" "b" c:"c" {',
|
|
' return [arguments.length, offset, line, column, a, c];',
|
|
'}'
|
|
].join("\n"), options);
|
|
parses(multiElementLabeledParser, "abc", [5, 0, 1, 1, "a", "c"]);
|
|
|
|
var innerElementsUnlabeledParser = PEG.buildParser(
|
|
'start = "a" ("b" "c" "d" { return arguments.length; }) "e"',
|
|
options
|
|
);
|
|
parses(innerElementsUnlabeledParser, "abcde", ["a", 3, "e"]);
|
|
|
|
var innerElementsLabeledParser = PEG.buildParser([
|
|
'start = "a"',
|
|
' (',
|
|
' b:"b" "c" d:"d" {',
|
|
' return [arguments.length, offset, line, column, b, d];',
|
|
' }',
|
|
' )',
|
|
' "e"'
|
|
].join("\n"), options);
|
|
parses(
|
|
innerElementsLabeledParser,
|
|
"abcde",
|
|
["a", [5, 1, 1, 2, "b", "d"], "e"]
|
|
);
|
|
|
|
/*
|
|
* Test that the parsing position returns after successfull parsing of the
|
|
* action expression and action returning |null|.
|
|
*/
|
|
var posTestParser = PEG.buildParser(
|
|
'start = "a" { return null; } / "a"',
|
|
options
|
|
);
|
|
parses(posTestParser, "a", "a");
|
|
|
|
/* Test that the action is not called when its expression does not match. */
|
|
var notAMatchParser = PEG.buildParser(
|
|
'start = "a" { ok(false, "action got called when it should not be"); }',
|
|
options
|
|
);
|
|
doesNotParse(notAMatchParser, "b");
|
|
|
|
var numbersParser = PEG.buildParser([
|
|
'{ var result; }',
|
|
'start = line (nl+ line)* { return result; }',
|
|
'line = thing (" "+ thing)*',
|
|
'thing = digit / mark',
|
|
'digit = [0-9]',
|
|
'mark = "x" { result = [line, column]; }',
|
|
'nl = ("\\r" / "\\n" / "\\u2028" / "\\u2029")'
|
|
].join("\n"), options);
|
|
|
|
parses(numbersParser, "1\n2\n\n3\n\n\n4 5 x", [7, 5]);
|
|
|
|
/* Non-Unix newlines */
|
|
parses(numbersParser, "1\rx", [2, 1]); // Old Mac
|
|
parses(numbersParser, "1\r\nx", [2, 1]); // Windows
|
|
parses(numbersParser, "1\n\rx", [3, 1]); // mismatched
|
|
|
|
/* Strange newlines */
|
|
parses(numbersParser, "1\u2028x", [2, 1]); // line separator
|
|
parses(numbersParser, "1\u2029x", [2, 1]); // paragraph separator
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("initializer", function(options) {
|
|
var variableInActionParser = PEG.buildParser(
|
|
'{ a = 42; }; start = "a" { return a; }',
|
|
options
|
|
);
|
|
parses(variableInActionParser, "a", 42);
|
|
|
|
var functionInActionParser = PEG.buildParser(
|
|
'{ function f() { return 42; } }; start = "a" { return f(); }',
|
|
options
|
|
);
|
|
parses(functionInActionParser, "a", 42);
|
|
|
|
var variableInSemanticAndParser = PEG.buildParser(
|
|
'{ a = 42; }; start = "a" &{ return a === 42; }',
|
|
options
|
|
);
|
|
parses(variableInSemanticAndParser, "a", ["a", ""]);
|
|
|
|
var functionInSemanticAndParser = PEG.buildParser(
|
|
'{ function f() { return 42; } }; start = "a" &{ return f() === 42; }',
|
|
options
|
|
);
|
|
parses(functionInSemanticAndParser, "a", ["a", ""]);
|
|
|
|
var variableInSemanticNotParser = PEG.buildParser(
|
|
'{ a = 42; }; start = "a" !{ return a !== 42; }',
|
|
options
|
|
);
|
|
parses(variableInSemanticNotParser, "a", ["a", ""]);
|
|
|
|
var functionInSemanticNotParser = PEG.buildParser(
|
|
'{ function f() { return 42; } }; start = "a" !{ return f() !== 42; }',
|
|
options
|
|
);
|
|
parses(functionInSemanticNotParser, "a", ["a", ""]);
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("rule references", function(options) {
|
|
var parser = PEG.buildParser([
|
|
'start = static / dynamic',
|
|
'static = "C" / "C++" / "Java" / "C#"',
|
|
'dynamic = "Ruby" / "Python" / "JavaScript"'
|
|
].join("\n"), options);
|
|
parses(parser, "Java", "Java");
|
|
parses(parser, "Python", "Python");
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("literals", function(options) {
|
|
var zeroCharParser = PEG.buildParser('start = ""', options);
|
|
parses(zeroCharParser, "", "");
|
|
doesNotParse(zeroCharParser, "a");
|
|
|
|
var oneCharCaseSensitiveParser = PEG.buildParser('start = "a"', options);
|
|
parses(oneCharCaseSensitiveParser, "a", "a");
|
|
doesNotParse(oneCharCaseSensitiveParser, "");
|
|
doesNotParse(oneCharCaseSensitiveParser, "A");
|
|
doesNotParse(oneCharCaseSensitiveParser, "b");
|
|
|
|
var multiCharCaseSensitiveParser = PEG.buildParser('start = "abcd"', options);
|
|
parses(multiCharCaseSensitiveParser, "abcd", "abcd");
|
|
doesNotParse(multiCharCaseSensitiveParser, "");
|
|
doesNotParse(multiCharCaseSensitiveParser, "abc");
|
|
doesNotParse(multiCharCaseSensitiveParser, "abcde");
|
|
doesNotParse(multiCharCaseSensitiveParser, "ABCD");
|
|
doesNotParse(multiCharCaseSensitiveParser, "efgh");
|
|
|
|
var oneCharCaseInsensitiveParser = PEG.buildParser('start = "a"i', options);
|
|
parses(oneCharCaseInsensitiveParser, "a", "a");
|
|
parses(oneCharCaseInsensitiveParser, "A", "A");
|
|
doesNotParse(oneCharCaseInsensitiveParser, "");
|
|
doesNotParse(oneCharCaseInsensitiveParser, "b");
|
|
|
|
var multiCharCaseInsensitiveParser = PEG.buildParser(
|
|
'start = "abcd"i',
|
|
options
|
|
);
|
|
parses(multiCharCaseInsensitiveParser, "abcd", "abcd");
|
|
parses(multiCharCaseInsensitiveParser, "ABCD", "ABCD");
|
|
doesNotParse(multiCharCaseInsensitiveParser, "");
|
|
doesNotParse(multiCharCaseInsensitiveParser, "abc");
|
|
doesNotParse(multiCharCaseInsensitiveParser, "abcde");
|
|
doesNotParse(multiCharCaseInsensitiveParser, "efgh");
|
|
|
|
/*
|
|
* Test that the parsing position moves forward after successful parsing of
|
|
* a literal.
|
|
*/
|
|
var posTestParser = PEG.buildParser('start = "a" "b"', options);
|
|
parses(posTestParser, "ab", ["a", "b"]);
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("anys", function(options) {
|
|
var parser = PEG.buildParser('start = .', options);
|
|
parses(parser, "a", "a");
|
|
doesNotParse(parser, "");
|
|
doesNotParse(parser, "ab");
|
|
|
|
/*
|
|
* Test that the parsing position moves forward after successful parsing of
|
|
* an any.
|
|
*/
|
|
var posTestParser = PEG.buildParser('start = . .', options);
|
|
parses(posTestParser, "ab", ["a", "b"]);
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("classes", function(options) {
|
|
var emptyClassParser = PEG.buildParser('start = []', options);
|
|
doesNotParse(emptyClassParser, "");
|
|
doesNotParse(emptyClassParser, "a");
|
|
doesNotParse(emptyClassParser, "ab");
|
|
|
|
var invertedEmptyClassParser = PEG.buildParser('start = [^]', options);
|
|
doesNotParse(invertedEmptyClassParser, "");
|
|
parses(invertedEmptyClassParser, "a", "a");
|
|
doesNotParse(invertedEmptyClassParser, "ab");
|
|
|
|
var nonEmptyCaseSensitiveClassParser = PEG.buildParser(
|
|
'start = [ab-d]',
|
|
options
|
|
);
|
|
parses(nonEmptyCaseSensitiveClassParser, "a", "a");
|
|
parses(nonEmptyCaseSensitiveClassParser, "b", "b");
|
|
parses(nonEmptyCaseSensitiveClassParser, "c", "c");
|
|
parses(nonEmptyCaseSensitiveClassParser, "d", "d");
|
|
doesNotParse(nonEmptyCaseSensitiveClassParser, "");
|
|
doesNotParse(nonEmptyCaseSensitiveClassParser, "A");
|
|
doesNotParse(nonEmptyCaseSensitiveClassParser, "B");
|
|
doesNotParse(nonEmptyCaseSensitiveClassParser, "C");
|
|
doesNotParse(nonEmptyCaseSensitiveClassParser, "D");
|
|
doesNotParse(nonEmptyCaseSensitiveClassParser, "e");
|
|
doesNotParse(nonEmptyCaseSensitiveClassParser, "ab");
|
|
|
|
var invertedNonEmptyCaseSensitiveClassParser = PEG.buildParser(
|
|
'start = [^ab-d]',
|
|
options
|
|
);
|
|
parses(invertedNonEmptyCaseSensitiveClassParser, "A", "A");
|
|
parses(invertedNonEmptyCaseSensitiveClassParser, "B", "B");
|
|
parses(invertedNonEmptyCaseSensitiveClassParser, "C", "C");
|
|
parses(invertedNonEmptyCaseSensitiveClassParser, "D", "D");
|
|
parses(invertedNonEmptyCaseSensitiveClassParser, "e", "e");
|
|
doesNotParse(invertedNonEmptyCaseSensitiveClassParser, "a", "a");
|
|
doesNotParse(invertedNonEmptyCaseSensitiveClassParser, "b", "b");
|
|
doesNotParse(invertedNonEmptyCaseSensitiveClassParser, "c", "c");
|
|
doesNotParse(invertedNonEmptyCaseSensitiveClassParser, "d", "d");
|
|
doesNotParse(invertedNonEmptyCaseSensitiveClassParser, "");
|
|
doesNotParse(invertedNonEmptyCaseSensitiveClassParser, "ab");
|
|
|
|
var nonEmptyCaseInsensitiveClassParser = PEG.buildParser(
|
|
'start = [ab-d]i',
|
|
options
|
|
);
|
|
parses(nonEmptyCaseInsensitiveClassParser, "a", "a");
|
|
parses(nonEmptyCaseInsensitiveClassParser, "b", "b");
|
|
parses(nonEmptyCaseInsensitiveClassParser, "c", "c");
|
|
parses(nonEmptyCaseInsensitiveClassParser, "d", "d");
|
|
parses(nonEmptyCaseInsensitiveClassParser, "A", "A");
|
|
parses(nonEmptyCaseInsensitiveClassParser, "B", "B");
|
|
parses(nonEmptyCaseInsensitiveClassParser, "C", "C");
|
|
parses(nonEmptyCaseInsensitiveClassParser, "D", "D");
|
|
doesNotParse(nonEmptyCaseInsensitiveClassParser, "");
|
|
doesNotParse(nonEmptyCaseInsensitiveClassParser, "e");
|
|
doesNotParse(nonEmptyCaseInsensitiveClassParser, "ab");
|
|
|
|
var invertedNonEmptyCaseInsensitiveClassParser = PEG.buildParser(
|
|
'start = [^ab-d]i',
|
|
options
|
|
);
|
|
parses(invertedNonEmptyCaseInsensitiveClassParser, "e", "e");
|
|
doesNotParse(invertedNonEmptyCaseInsensitiveClassParser, "a", "a");
|
|
doesNotParse(invertedNonEmptyCaseInsensitiveClassParser, "b", "b");
|
|
doesNotParse(invertedNonEmptyCaseInsensitiveClassParser, "c", "c");
|
|
doesNotParse(invertedNonEmptyCaseInsensitiveClassParser, "d", "d");
|
|
doesNotParse(invertedNonEmptyCaseInsensitiveClassParser, "A", "A");
|
|
doesNotParse(invertedNonEmptyCaseInsensitiveClassParser, "B", "B");
|
|
doesNotParse(invertedNonEmptyCaseInsensitiveClassParser, "C", "C");
|
|
doesNotParse(invertedNonEmptyCaseInsensitiveClassParser, "D", "D");
|
|
doesNotParse(invertedNonEmptyCaseInsensitiveClassParser, "");
|
|
doesNotParse(invertedNonEmptyCaseInsensitiveClassParser, "ab");
|
|
|
|
/*
|
|
* Test that the parsing position moves forward after successful parsing of
|
|
* a class.
|
|
*/
|
|
var posTestParser = PEG.buildParser('start = [ab-d] [ab-d]', options);
|
|
parses(posTestParser, "ab", ["a", "b"]);
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("cache", function(options) {
|
|
/*
|
|
* Should trigger a codepath where the cache is used (for the "a" rule).
|
|
*/
|
|
var parser = PEG.buildParser([
|
|
'start = (a b) / (a c)',
|
|
'a = "a"',
|
|
'b = "b"',
|
|
'c = "c"'
|
|
].join("\n"), options);
|
|
parses(parser, "ac", ["a", "c"]);
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("indempotence", function(options) {
|
|
var parser1 = PEG.buildParser('start = "abcd"', options);
|
|
var parser2 = PEG.buildParser('start = "abcd"', options);
|
|
|
|
strictEqual(parser1.toSource(), parser2.toSource());
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("error details", function(options) {
|
|
var literalParser = PEG.buildParser('start = "abcd"', options);
|
|
doesNotParseWithDetails(
|
|
literalParser,
|
|
"",
|
|
["\"abcd\""],
|
|
null,
|
|
'Expected "abcd" but end of input found.'
|
|
);
|
|
doesNotParseWithDetails(
|
|
literalParser,
|
|
"efgh",
|
|
["\"abcd\""],
|
|
"e",
|
|
'Expected "abcd" but "e" found.'
|
|
);
|
|
doesNotParseWithDetails(
|
|
literalParser,
|
|
"abcde",
|
|
[],
|
|
"e",
|
|
'Expected end of input but "e" found.'
|
|
);
|
|
|
|
var classParser = PEG.buildParser('start = [a-d]', options);
|
|
doesNotParseWithDetails(
|
|
classParser,
|
|
"",
|
|
["[a-d]"],
|
|
null,
|
|
'Expected [a-d] but end of input found.'
|
|
);
|
|
var negativeClassParser = PEG.buildParser('start = [^a-d]', options);
|
|
doesNotParseWithDetails(
|
|
negativeClassParser,
|
|
"",
|
|
["[^a-d]"],
|
|
null,
|
|
'Expected [^a-d] but end of input found.'
|
|
);
|
|
|
|
var anyParser = PEG.buildParser('start = .', options);
|
|
doesNotParseWithDetails(
|
|
anyParser,
|
|
"",
|
|
["any character"],
|
|
null,
|
|
'Expected any character but end of input found.'
|
|
);
|
|
|
|
var namedRuleWithLiteralParser = PEG.buildParser(
|
|
'start "digit" = [0-9]',
|
|
options
|
|
);
|
|
doesNotParseWithDetails(
|
|
namedRuleWithLiteralParser,
|
|
"a",
|
|
["digit"],
|
|
"a",
|
|
'Expected digit but "a" found.'
|
|
);
|
|
|
|
var namedRuleWithAnyParser = PEG.buildParser('start "whatever" = .', options);
|
|
doesNotParseWithDetails(
|
|
namedRuleWithAnyParser,
|
|
"",
|
|
["whatever"],
|
|
null,
|
|
'Expected whatever but end of input found.'
|
|
);
|
|
|
|
var namedRuleWithNamedRuleParser = PEG.buildParser([
|
|
'start "digits" = digit+',
|
|
'digit "digit" = [0-9]'
|
|
].join("\n"), options);
|
|
doesNotParseWithDetails(
|
|
namedRuleWithNamedRuleParser,
|
|
"",
|
|
["digits"],
|
|
null,
|
|
'Expected digits but end of input found.'
|
|
);
|
|
|
|
var choiceParser1 = PEG.buildParser('start = "a" / "b" / "c"', options);
|
|
doesNotParseWithDetails(
|
|
choiceParser1,
|
|
"def",
|
|
["\"a\"", "\"b\"", "\"c\""],
|
|
"d",
|
|
'Expected "a", "b" or "c" but "d" found.'
|
|
);
|
|
|
|
var choiceParser2 = PEG.buildParser('start = "a" "b" "c" / "a"', options);
|
|
doesNotParseWithDetails(
|
|
choiceParser2,
|
|
"abd",
|
|
["\"c\""],
|
|
"d",
|
|
'Expected "c" but "d" found.'
|
|
);
|
|
|
|
var simpleNotParser = PEG.buildParser('start = !"a" "b"', options);
|
|
doesNotParseWithDetails(
|
|
simpleNotParser,
|
|
"c",
|
|
["\"b\""],
|
|
"c",
|
|
'Expected "b" but "c" found.'
|
|
);
|
|
|
|
var simpleAndParser = PEG.buildParser('start = &"a" [a-b]', options);
|
|
doesNotParseWithDetails(
|
|
simpleAndParser,
|
|
"c",
|
|
[],
|
|
"c",
|
|
'Expected end of input but "c" found.'
|
|
);
|
|
|
|
var emptyParser = PEG.buildParser('start = ', options);
|
|
doesNotParseWithDetails(
|
|
emptyParser,
|
|
"something",
|
|
[],
|
|
"s",
|
|
'Expected end of input but "s" found.'
|
|
);
|
|
|
|
var duplicateErrorParser = PEG.buildParser('start = "a" / "a"', options);
|
|
doesNotParseWithDetails(
|
|
duplicateErrorParser,
|
|
"",
|
|
["\"a\""],
|
|
null,
|
|
'Expected "a" but end of input found.'
|
|
);
|
|
|
|
var unsortedErrorsParser = PEG.buildParser('start = "b" / "a"', options);
|
|
doesNotParseWithDetails(
|
|
unsortedErrorsParser,
|
|
"",
|
|
["\"a\"", "\"b\""],
|
|
null,
|
|
'Expected "a" or "b" but end of input found.'
|
|
);
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("error positions", function(options) {
|
|
var simpleParser = PEG.buildParser('start = "a"', options);
|
|
|
|
/* Regular match failure */
|
|
doesNotParseWithPos(simpleParser, "b", 0, 1, 1);
|
|
|
|
/* Trailing input */
|
|
doesNotParseWithPos(simpleParser, "ab", 1, 1, 2);
|
|
|
|
var digitsParser = PEG.buildParser([
|
|
'start = line (("\\r" / "\\n" / "\\u2028" / "\\u2029")+ line)*',
|
|
'line = digits (" "+ digits)*',
|
|
'digits = digits:[0-9]+ { return digits.join(""); }'
|
|
].join("\n"), options);
|
|
|
|
doesNotParseWithPos(digitsParser, "1\n2\n\n3\n\n\n4 5 x", 13, 7, 5);
|
|
|
|
/* Non-Unix newlines */
|
|
doesNotParseWithPos(digitsParser, "1\rx", 2, 2, 1); // Old Mac
|
|
doesNotParseWithPos(digitsParser, "1\r\nx", 3, 2, 1); // Windows
|
|
doesNotParseWithPos(digitsParser, "1\n\rx", 3, 3, 1); // mismatched
|
|
|
|
/* Strange newlines */
|
|
doesNotParseWithPos(digitsParser, "1\u2028x", 2, 2, 1); // line separator
|
|
doesNotParseWithPos(digitsParser, "1\u2029x", 2, 2, 1); // paragraph separator
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("start rule", function(options) {
|
|
var parser = PEG.buildParser([
|
|
'a = .* { return "alpha"; }',
|
|
'b = .* { return "beta"; }'
|
|
].join("\n"), options);
|
|
|
|
/* Default start rule = the first one */
|
|
parses(parser, "whatever", "alpha");
|
|
|
|
/* Explicit specification of the start rule */
|
|
parsesWithStartRule(parser, "whatever", "a", "alpha");
|
|
parsesWithStartRule(parser, "whatever", "b", "beta");
|
|
|
|
/* Invalid rule name */
|
|
raises(
|
|
function() { parser.parse("whatever", "c"); },
|
|
function(e) {
|
|
return e instanceof Error && e.message === "Invalid rule name: \"c\".";
|
|
}
|
|
);
|
|
});
|
|
|
|
/*
|
|
* Following examples are from Wikipedia, see
|
|
* http://en.wikipedia.org/w/index.php?title=Parsing_expression_grammar&oldid=335106938.
|
|
*/
|
|
|
|
testWithVaryingTrackLineAndColumn("arithmetics", function(options) {
|
|
/*
|
|
* Value ← [0-9]+ / '(' Expr ')'
|
|
* Product ← Value (('*' / '/') Value)*
|
|
* Sum ← Product (('+' / '-') Product)*
|
|
* Expr ← Sum
|
|
*/
|
|
var parser = PEG.buildParser([
|
|
'Expr = Sum',
|
|
'Sum = head:Product tail:(("+" / "-") Product)* {',
|
|
' var result = head;',
|
|
' for (var i = 0; i < tail.length; i++) {',
|
|
' if (tail[i][0] == "+") { result += tail[i][1]; }',
|
|
' if (tail[i][0] == "-") { result -= tail[i][1]; }',
|
|
' }',
|
|
' return result;',
|
|
' }',
|
|
'Product = head:Value tail:(("*" / "/") Value)* {',
|
|
' var result = head;',
|
|
' for (var i = 0; i < tail.length; i++) {',
|
|
' if (tail[i][0] == "*") { result *= tail[i][1]; }',
|
|
' if (tail[i][0] == "/") { result /= tail[i][1]; }',
|
|
' }',
|
|
' return result;',
|
|
' }',
|
|
'Value = digits:[0-9]+ { return parseInt(digits.join("")); }',
|
|
' / "(" expr:Expr ")" { return expr; }'
|
|
].join("\n"), options);
|
|
|
|
/* Test "value" rule. */
|
|
parses(parser, "0", 0);
|
|
parses(parser, "123", 123);
|
|
parses(parser, "(42+43)", 42+43);
|
|
|
|
/* Test "product" rule. */
|
|
parses(parser, "42", 42);
|
|
parses(parser, "42*43", 42*43);
|
|
parses(parser, "42*43*44*45", 42*43*44*45);
|
|
parses(parser, "42/43", 42/43);
|
|
parses(parser, "42/43/44/45", 42/43/44/45);
|
|
|
|
/* Test "sum" rule. */
|
|
parses(parser, "42*43", 42*43);
|
|
parses(parser, "42*43+44*45", 42*43+44*45);
|
|
parses(parser, "42*43+44*45+46*47+48*49", 42*43+44*45+46*47+48*49);
|
|
parses(parser, "42*43-44*45", 42*43-44*45);
|
|
parses(parser, "42*43-44*45-46*47-48*49", 42*43-44*45-46*47-48*49);
|
|
|
|
/* Test "expr" rule. */
|
|
parses(parser, "42+43", 42+43);
|
|
|
|
/* Complex test */
|
|
parses(parser, "(1+2)*(3+4)",(1+2)*(3+4));
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("non-context-free language", function(options) {
|
|
/* The following parsing expression grammar describes the classic
|
|
* non-context-free language { a^n b^n c^n : n >= 1 }:
|
|
*
|
|
* S ← &(A c) a+ B !(a/b/c)
|
|
* A ← a A? b
|
|
* B ← b B? c
|
|
*/
|
|
var parser = PEG.buildParser([
|
|
'S = &(A "c") a:"a"+ B:B !("a" / "b" / "c") { return a.join("") + B; }',
|
|
'A = a:"a" A:A? b:"b" { return a + A + b; }',
|
|
'B = b:"b" B:B? c:"c" { return b + B + c; }'
|
|
].join("\n"), options);
|
|
|
|
parses(parser, "abc", "abc");
|
|
parses(parser, "aaabbbccc", "aaabbbccc");
|
|
doesNotParse(parser, "aabbbccc");
|
|
doesNotParse(parser, "aaaabbbccc");
|
|
doesNotParse(parser, "aaabbccc");
|
|
doesNotParse(parser, "aaabbbbccc");
|
|
doesNotParse(parser, "aaabbbcc");
|
|
doesNotParse(parser, "aaabbbcccc");
|
|
});
|
|
|
|
testWithVaryingTrackLineAndColumn("nested comments", function(options) {
|
|
/*
|
|
* Begin ← "(*"
|
|
* End ← "*)"
|
|
* C ← Begin N* End
|
|
* N ← C / (!Begin !End Z)
|
|
* Z ← any single character
|
|
*/
|
|
var parser = PEG.buildParser([
|
|
'C = begin:Begin ns:N* end:End { return begin + ns.join("") + end; }',
|
|
'N = C',
|
|
' / !Begin !End z:Z { return z; }',
|
|
'Z = .',
|
|
'Begin = "(*"',
|
|
'End = "*)"'
|
|
].join("\n"), options);
|
|
|
|
parses(parser, "(**)", "(**)");
|
|
parses(parser, "(*abc*)", "(*abc*)");
|
|
parses(parser, "(*(**)*)", "(*(**)*)");
|
|
parses(
|
|
parser,
|
|
"(*abc(*def*)ghi(*(*(*jkl*)*)*)mno*)",
|
|
"(*abc(*def*)ghi(*(*(*jkl*)*)*)mno*)"
|
|
);
|
|
});
|
|
|
|
})();
|