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AST refactoring 6/6: Get rid of the |Grammar| namespace

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redux
David Majda 14 years ago
parent b4bf49443a
commit 76ed63c86e
3 changed files with 496 additions and 504 deletions
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48
lib/compiler.js
Unescape Escape View File

@ -14,8 +14,8 @@
* "start" is used.
*
* Throws |PEG.grammarParser.SyntaxError| if the grammar contains a syntax error
* or |PEG.Grammar.GrammarError| if it contains a semantic error. Note that not
* all errors are detected during the generation and some may protrude to the
* or |PEG.GrammarError| if it contains a semantic error. Note that not all
* errors are detected during the generation and some may protrude to the
* generated parser and cause its malfunction.
*/
PEG.buildParser = function(grammar, startRule) {
@ -27,6 +27,17 @@ PEG.buildParser = function(grammar, startRule) {
);
};
/* ===== PEG.GrammarError ===== */
/* Thrown when the grammar contains an error. */
PEG.GrammarError = function(message) {
this.name = "PEG.GrammarError";
this.message = message;
};
PEG.GrammarError.prototype = Error.prototype;
/* ===== PEG.ArrayUtils ===== */
/* Array manipulation utility functions. */
@ -136,23 +147,6 @@ PEG.RegExpUtils = {
}
};
/* ===== PEG.Grammar ===== */
/* Namespace with grammar AST nodes. */
PEG.Grammar = {};
/* ===== PEG.Grammar.GrammarError ===== */
/* Thrown when the grammar contains an error. */
PEG.Grammar.GrammarError = function(message) {
this.name = "PEG.Grammar.GrammarError";
this.message = message;
};
PEG.Grammar.GrammarError.prototype = Error.prototype;
/* ===== PEG.Compiler ===== */
PEG.Compiler = {
@ -261,8 +255,8 @@ PEG.Compiler = {
* Checks made on the grammar AST before compilation. Each check is a function
* that is passed the AST and start rule and does not return anything. If the
* check passes, the function does not do anything special, otherwise it
* throws |PEG.Grammar.GrammarError|. The checks are run in sequence in order
* of their definition.
* throws |PEG.GrammarError|. The checks are run in sequence in order of their
* definition.
*/
_checks: [
/* Checks that all referenced rules exist. */
@ -291,7 +285,7 @@ PEG.Compiler = {
rule_ref:
function(node) {
if (ast[node.name] === undefined) {
throw new PEG.Grammar.GrammarError(
throw new PEG.GrammarError(
"Referenced rule \"" + node.name + "\" does not exist."
);
}
@ -312,7 +306,7 @@ PEG.Compiler = {
/* Checks that the start rule is defined. */
function(ast, startRule) {
if (ast[startRule] === undefined) {
throw new PEG.Grammar.GrammarError(
throw new PEG.GrammarError(
"Missing \"" + startRule + "\" rule."
);
}
@ -356,7 +350,7 @@ PEG.Compiler = {
rule_ref:
function(node, appliedRules) {
if (PEG.ArrayUtils.contains(appliedRules, node.name)) {
throw new PEG.Grammar.GrammarError(
throw new PEG.GrammarError(
"Left recursion detected for rule \"" + node.name + "\"."
);
}
@ -771,9 +765,9 @@ PEG.Compiler = {
/*
* Generates a parser from a specified grammar AST and start rule. Throws
* |PEG.Grammar.GrammarError| if the AST contains a semantic error. Note that
* not all errors are detected during the generation and some may protrude to
* the generated parser and cause its malfunction.
* |PEG.GrammarError| if the AST contains a semantic error. Note that not all
* errors are detected during the generation and some may protrude to the
* generated parser and cause its malfunction.
*/
compileParser: function(ast, startRule) {
/*

6
test/compiler-test.js
Unescape Escape View File

@ -194,7 +194,7 @@ test("buildParser reports syntax errors in the grammar", function() {
test("buildParser reports missing start rule", function() {
throws(
function() { PEG.buildParser('notStart: "abcd"'); },
PEG.Grammar.GrammarError,
PEG.GrammarError,
{ message: "Missing \"start\" rule." }
);
});
@ -217,7 +217,7 @@ test("buildParser reports missing referenced rules", function() {
PEG.ArrayUtils.each(grammars, function(grammar) {
throws(
function() { PEG.buildParser(grammar); },
PEG.Grammar.GrammarError,
PEG.GrammarError,
{ message: "Referenced rule \"missing\" does not exist." }
);
});
@ -244,7 +244,7 @@ test("buildParser reports left recursion", function() {
PEG.ArrayUtils.each(grammars, function(grammar) {
throws(
function() { PEG.buildParser(grammar); },
PEG.Grammar.GrammarError,
PEG.GrammarError,
{ message: "Left recursion detected for rule \"start\"." }
);
});

946
test/metagrammar-test.js
Unescape Escape View File

@ -16,505 +16,503 @@ global.grammarParserDoesNotParse = function(input) {
module("Grammar Parser");
with (PEG.Grammar) {
function rule(name, displayName, expression) {
return {
type: "rule",
name: name,
displayName: displayName,
expression: expression
};
}
function rule(name, displayName, expression) {
return {
type: "rule",
name: name,
displayName: displayName,
expression: expression
};
}
function choice(alternatives) {
return {
type: "choice",
alternatives: alternatives
};
}
function choice(alternatives) {
return {
type: "choice",
alternatives: alternatives
};
}
function sequence(elements) {
return {
type: "sequence",
elements: elements
};
}
function sequence(elements) {
function nodeWithExpressionConstructor(type) {
return function(expression) {
return {
type: "sequence",
elements: elements
type: type,
expression: expression
};
}
}
function nodeWithExpressionConstructor(type) {
return function(expression) {
return {
type: type,
expression: expression
};
}
}
var andPredicate = nodeWithExpressionConstructor("and_predicate");
var notPredicate = nodeWithExpressionConstructor("not_predicate");
var andPredicate = nodeWithExpressionConstructor("and_predicate");
var notPredicate = nodeWithExpressionConstructor("not_predicate");
var optional = nodeWithExpressionConstructor("optional");
var zeroOrMore = nodeWithExpressionConstructor("zero_or_more");
var oneOrMore = nodeWithExpressionConstructor("one_or_more");
var optional = nodeWithExpressionConstructor("optional");
var zeroOrMore = nodeWithExpressionConstructor("zero_or_more");
var oneOrMore = nodeWithExpressionConstructor("one_or_more");
function action(expression, action) {
return {
type: "action",
expression: expression,
action: action
};
function action(expression, action) {
return {
type: "action",
expression: expression,
action: action
};
};
function ruleRef(name) {
return {
type: "rule_ref",
name: name
};
}
function literal(value) {
return {
type: "literal",
value: value
};
}
function ruleRef(name) {
return {
type: "rule_ref",
name: name
};
}
function any() {
return { type: "any" };
}
function literal(value) {
return {
type: "literal",
value: value
};
}
function klass(characters) {
return {
type: "class",
characters: characters
};
}
function any() {
return { type: "any" };
}
var literalAbcd = literal("abcd");
var literalEfgh = literal("efgh");
var literalIjkl = literal("ijkl");
function klass(characters) {
return {
type: "class",
characters: characters
};
}
var optionalLiteral = optional(literalAbcd);
var literalAbcd = literal("abcd");
var literalEfgh = literal("efgh");
var literalIjkl = literal("ijkl");
var notAbcd = notPredicate(literalAbcd);
var notEfgh = notPredicate(literalEfgh);
var notIjkl = notPredicate(literalIjkl);
var optionalLiteral = optional(literalAbcd);
var sequenceEmpty = sequence([]);
var sequenceNots = sequence([notAbcd, notEfgh, notIjkl]);
var sequenceLiterals = sequence([literalAbcd, literalEfgh, literalIjkl]);
var notAbcd = notPredicate(literalAbcd);
var notEfgh = notPredicate(literalEfgh);
var notIjkl = notPredicate(literalIjkl);
var choiceLiterals = choice([literalAbcd, literalEfgh, literalIjkl]);
var sequenceEmpty = sequence([]);
var sequenceNots = sequence([notAbcd, notEfgh, notIjkl]);
var sequenceLiterals = sequence([literalAbcd, literalEfgh, literalIjkl]);
function oneRuleGrammar(expression) {
return { start: rule("start", null, expression) };
}
var choiceLiterals = choice([literalAbcd, literalEfgh, literalIjkl]);
var simpleGrammar = oneRuleGrammar(literal("abcd"));
function oneRuleGrammar(expression) {
return { start: rule("start", null, expression) };
}
function identifierGrammar(identifier) {
return oneRuleGrammar(ruleRef(identifier));
}
var simpleGrammar = oneRuleGrammar(literal("abcd"));
var literal_ = literal
function literalGrammar(literal) {
return oneRuleGrammar(literal_(literal));
}
function identifierGrammar(identifier) {
return oneRuleGrammar(ruleRef(identifier));
}
function classGrammar(chars) {
return oneRuleGrammar(klass(chars));
}
var literal_ = literal
function literalGrammar(literal) {
return oneRuleGrammar(literal_(literal));
}
var anyGrammar = oneRuleGrammar(any());
function classGrammar(chars) {
return oneRuleGrammar(klass(chars));
}
var action_ = action;
function actionGrammar(action) {
return oneRuleGrammar(action_(literal("a"), action));
}
var anyGrammar = oneRuleGrammar(any());
/* Canonical grammar is "a: \"abcd\";\nb: \"efgh\";\nc: \"ijkl\";". */
test("parses grammar", function() {
grammarParserParses('a: "abcd"', { a: rule("a", null, literalAbcd) });
grammarParserParses(
'a: "abcd"\nb: "efgh"\nc: "ijkl"',
{
a: rule("a", null, literalAbcd),
b: rule("b", null, literalEfgh),
c: rule("c", null, literalIjkl)
}
);
});
/* Canonical rule is "a: \"abcd\"". */
test("parses rule", function() {
grammarParserParses(
'start: "abcd" / "efgh" / "ijkl"',
oneRuleGrammar(choiceLiterals)
);
grammarParserParses(
'start "start rule": "abcd" / "efgh" / "ijkl"',
{
start: rule("start", "start rule", choiceLiterals)
}
);
});
/* Canonical expression is "\"abcd\" / \"efgh\" / \"ijkl\"". */
test("parses expression", function() {
grammarParserParses(
'start: "abcd" / "efgh" / "ijkl"',
oneRuleGrammar(choiceLiterals)
);
});
/* Canonical choice is "\"abcd\" / \"efgh\" / \"ijkl\"". */
test("parses choice", function() {
grammarParserParses(
'start: "abcd" "efgh" "ijkl"',
oneRuleGrammar(sequenceLiterals)
);
grammarParserParses(
'start: "abcd" "efgh" "ijkl" / "abcd" "efgh" "ijkl" / "abcd" "efgh" "ijkl"',
oneRuleGrammar(choice([
sequenceLiterals,
sequenceLiterals,
sequenceLiterals
]))
);
});
/* Canonical sequence is "\"abcd\" \"efgh\" \"ijkl\"". */
test("parses sequence", function() {
grammarParserParses(
'start: { code }',
oneRuleGrammar(action(sequenceEmpty, " code "))
);
grammarParserParses(
'start: !"abcd" { code }',
oneRuleGrammar(action(notAbcd, " code "))
);
grammarParserParses(
'start: !"abcd" !"efgh" !"ijkl" { code }',
oneRuleGrammar(action(sequenceNots, " code "))
);
grammarParserParses('start: ', oneRuleGrammar(sequenceEmpty));
grammarParserParses('start: !"abcd"', oneRuleGrammar(notAbcd));
grammarParserParses(
'start: !"abcd" !"efgh" !"ijkl"',
oneRuleGrammar(sequenceNots)
);
});
/* Canonical prefixed is "!\"abcd\"". */
test("parses prefixed", function() {
grammarParserParses('start: &"abcd"?', oneRuleGrammar(andPredicate(optionalLiteral)));
grammarParserParses('start: !"abcd"?', oneRuleGrammar(notPredicate(optionalLiteral)));
grammarParserParses('start: "abcd"?', oneRuleGrammar(optionalLiteral));
});
/* Canonical suffixed is "\"abcd\"?". */
test("parses suffixed", function() {
grammarParserParses('start: "abcd"?', oneRuleGrammar(optionalLiteral));
grammarParserParses('start: "abcd"*', oneRuleGrammar(zeroOrMore(literalAbcd)));
grammarParserParses('start: "abcd"+', oneRuleGrammar(oneOrMore(literalAbcd)));
grammarParserParses('start: "abcd"', literalGrammar("abcd"));
});
/* Canonical primary is "\"abcd\"". */
test("parses primary", function() {
grammarParserParses('start: a', identifierGrammar("a"));
grammarParserParses('start: "abcd"', literalGrammar("abcd"));
grammarParserParses('start: .', anyGrammar);
grammarParserParses('start: [a-d]', classGrammar("a-d"));
grammarParserParses('start: ("abcd")', literalGrammar("abcd"));
});
/* Canonical action is "{ code }". */
test("parses action", function() {
grammarParserParses('start: "a" { code }', actionGrammar(" code "));
});
/* Canonical braced is "{ code }". */
test("parses braced", function() {
grammarParserParses('start: "a" {}', actionGrammar(""));
grammarParserParses('start: "a" {a}', actionGrammar("a"));
grammarParserParses('start: "a" {{a}}', actionGrammar("{a}"));
grammarParserParses('start: "a" {aaa}', actionGrammar("aaa"));
});
/* Trivial character rules are not tested. */
/* Canonical identifier is "a". */
test("parses identifier", function() {
grammarParserParses('start: a', identifierGrammar("a"));
grammarParserParses('start: z', identifierGrammar("z"));
grammarParserParses('start: A', identifierGrammar("A"));
grammarParserParses('start: Z', identifierGrammar("Z"));
grammarParserParses('start: _', identifierGrammar("_"));
grammarParserParses('start: $', identifierGrammar("$"));
grammarParserParses('start: aa', identifierGrammar("aa"));
grammarParserParses('start: az', identifierGrammar("az"));
grammarParserParses('start: aA', identifierGrammar("aA"));
grammarParserParses('start: aZ', identifierGrammar("aZ"));
grammarParserParses('start: a0', identifierGrammar("a0"));
grammarParserParses('start: a9', identifierGrammar("a9"));
grammarParserParses('start: a_', identifierGrammar("a_"));
grammarParserParses('start: a$', identifierGrammar("a$"));
grammarParserParses('start: abcd', identifierGrammar("abcd"));
grammarParserParses('start: a\n', identifierGrammar("a"));
});
/* Canonical literal is "\"abcd\"". */
test("parses literal", function() {
grammarParserParses('start: "abcd"', literalGrammar("abcd"));
grammarParserParses("start: 'abcd'", literalGrammar("abcd"));
});
/* Canonical doubleQuotedLiteral is "\"abcd\"". */
test("parses doubleQuotedLiteral", function() {
grammarParserParses('start: ""', literalGrammar(""));
grammarParserParses('start: "a"', literalGrammar("a"));
grammarParserParses('start: "abc"', literalGrammar("abc"));
grammarParserParses('start: "abcd"\n', literalGrammar("abcd"));
});
/* Canonical doubleQuotedCharacter is "a". */
test("parses doubleQuotedCharacter", function() {
grammarParserParses('start: "a"', literalGrammar("a"));
grammarParserParses('start: "\\n"', literalGrammar("\n"));
grammarParserParses('start: "\\0"', literalGrammar("\0"));
grammarParserParses('start: "\\x00"', literalGrammar("\x00"));
grammarParserParses('start: "\\u0120"', literalGrammar("\u0120"));
grammarParserParses('start: "\\\n"', literalGrammar("\n"));
});
/* Canonical simpleDoubleQuotedCharacter is "a". */
test("parses simpleDoubleQuotedCharacter", function() {
grammarParserParses('start: "a"', literalGrammar("a"));
grammarParserParses('start: "\'"', literalGrammar("'"));
grammarParserDoesNotParse('start: """');
grammarParserDoesNotParse('start: "\\"');
grammarParserDoesNotParse('start: "\n"');
grammarParserDoesNotParse('start: "\r"');
grammarParserDoesNotParse('start: "\u2028"');
grammarParserDoesNotParse('start: "\u2029"');
});
/* Canonical singleQuotedLiteral is "'abcd'". */
test("parses singleQuotedLiteral", function() {
grammarParserParses("start: ''", literalGrammar(""));
grammarParserParses("start: 'a'", literalGrammar("a"));
grammarParserParses("start: 'abc'", literalGrammar("abc"));
grammarParserParses("start: 'abcd'\n", literalGrammar("abcd"));
});
/* Canonical singleQuotedCharacter is "a". */
test("parses singleQuotedCharacter", function() {
grammarParserParses("start: 'a'", literalGrammar("a"));
grammarParserParses("start: '\\n'", literalGrammar("\n"));
grammarParserParses("start: '\\0'", literalGrammar("\0"));
grammarParserParses("start: '\\x00'", literalGrammar("\x00"));
grammarParserParses("start: '\\u0120'", literalGrammar("\u0120"));
grammarParserParses("start: '\\\n'", literalGrammar("\n"));
});
/* Canonical simpleSingleQuotedCharacter is "a". */
test("parses simpleSingleQuotedCharacter", function() {
grammarParserParses("start: 'a'", literalGrammar("a"));
grammarParserParses("start: '\"'", literalGrammar("\""));
grammarParserDoesNotParse("start: '''");
grammarParserDoesNotParse("start: '\\'");
grammarParserDoesNotParse("start: '\n'");
grammarParserDoesNotParse("start: '\r'");
grammarParserDoesNotParse("start: '\u2028'");
grammarParserDoesNotParse("start: '\u2029'");
});
/* Canonical class is "[a-d]". */
test("parses class", function() {
grammarParserParses("start: []", classGrammar(""));
grammarParserParses("start: [a-d]", classGrammar("a-d"));
grammarParserParses("start: [^a-d]", classGrammar("^a-d"));
grammarParserParses("start: [a]", classGrammar("a"));
grammarParserParses("start: [a-de-hi-l]", classGrammar("a-de-hi-l"));
grammarParserParses("start: [a-d]\n", classGrammar("a-d"));
});
/* Canonical classCharacterRange is "a-d". */
test("parses classCharacterRange", function() {
grammarParserParses("start: [a-d]", classGrammar("a-d"));
grammarParserParses("start: [a-a]", classGrammar("a-a"));
grammarParserDoesNotParse("start: [b-a]");
});
/* Canonical classCharacter is "a". */
test("parses classCharacter", function() {
grammarParserParses("start: [a]", classGrammar("a"));
});
/* Canonical bracketDelimitedCharacter is "a". */
test("parses bracketDelimitedCharacter", function() {
grammarParserParses("start: [a]", classGrammar("a"));
grammarParserParses("start: [\\n]", classGrammar("\\n"));
grammarParserParses("start: [\\0]", classGrammar("\\0"));
grammarParserParses("start: [\\x00]", classGrammar("\\0"));
grammarParserParses("start: [\\u0120]", classGrammar("\u0120"));
grammarParserParses("start: [\\\n]", classGrammar("\\n"));
});
/* Canonical simpleBracketDelimiedCharacter is "a". */
test("parses simpleBracketDelimitedCharacter", function() {
grammarParserParses("start: [a]", classGrammar("a"));
grammarParserParses("start: [[]", classGrammar("["));
grammarParserDoesNotParse("start: []]");
grammarParserDoesNotParse("start: [\\]");
grammarParserDoesNotParse("start: [\n]");
grammarParserDoesNotParse("start: [\r]");
grammarParserDoesNotParse("start: [\u2028]");
grammarParserDoesNotParse("start: [\u2029]");
});
/* Canonical simpleEscapeSequence is "\\n". */
test("parses simpleEscapeSequence", function() {
grammarParserParses('start: "\\\'"', literalGrammar("'"));
grammarParserParses('start: "\\""', literalGrammar("\""));
grammarParserParses('start: "\\\\"', literalGrammar("\\"));
grammarParserParses('start: "\\b"', literalGrammar("\b"));
grammarParserParses('start: "\\f"', literalGrammar("\f"));
grammarParserParses('start: "\\n"', literalGrammar("\n"));
grammarParserParses('start: "\\r"', literalGrammar("\r"));
grammarParserParses('start: "\\t"', literalGrammar("\t"));
/* IE does not recognize "\v". */
grammarParserParses('start: "\\v"', literalGrammar("\x0B"));
grammarParserParses('start: "\\a"', literalGrammar("a"));
});
/* Canonical zeroEscapeSequence is "\\0". */
test("parses zeroEscapeSequence", function() {
grammarParserParses('start: "\\0"', literalGrammar("\0"));
grammarParserDoesNotParse('start: "\\00"');
grammarParserDoesNotParse('start: "\\09"');
});
/* Canonical hexEscapeSequence is "\\x00". */
test("parses hexEscapeSequence", function() {
grammarParserParses('start: "\\x00"', literalGrammar("\x00"));
grammarParserParses('start: "\\x09"', literalGrammar("\x09"));
grammarParserParses('start: "\\x0a"', literalGrammar("\x0a"));
grammarParserParses('start: "\\x0f"', literalGrammar("\x0f"));
grammarParserParses('start: "\\x0A"', literalGrammar("\x0A"));
grammarParserParses('start: "\\x0F"', literalGrammar("\x0F"));
grammarParserDoesNotParse('start: "\\x0"');
grammarParserParses('start: "\\x000"', literalGrammar("\x000"));
});
/* Canonical unicodeEscapeSequence is "\\u0120". */
test("parses unicodeEscapeSequence", function() {
grammarParserParses('start: "\\u0120"', literalGrammar("\u0120"));
grammarParserParses('start: "\\u0129"', literalGrammar("\u0129"));
grammarParserParses('start: "\\u012a"', literalGrammar("\u012a"));
grammarParserParses('start: "\\u012f"', literalGrammar("\u012f"));
grammarParserParses('start: "\\u012A"', literalGrammar("\u012A"));
grammarParserParses('start: "\\u012F"', literalGrammar("\u012F"));
grammarParserDoesNotParse('start: "\\u012"');
grammarParserParses('start: "\\u01234"', literalGrammar("\u01234"));
});
/* Canonical eolEscapeSequence is "\\\n". */
test("parses eolEscapeSequence", function() {
grammarParserParses('start: "\\\n"', literalGrammar("\n"));
grammarParserParses('start: "\\\r\n"', literalGrammar("\r\n"));
grammarParserParses('start: "\\\r"', literalGrammar("\r"));
grammarParserParses('start: "\\\u2028"', literalGrammar("\u2028"));
grammarParserParses('start: "\\\u2029"', literalGrammar("\u2029"));
});
/* Canonical __ is "\n". */
test("parses __", function() {
grammarParserParses('start:"abcd"', simpleGrammar);
grammarParserParses('start: "abcd"', simpleGrammar);
grammarParserParses('start:\n"abcd"', simpleGrammar);
grammarParserParses('start:/* comment */"abcd"', simpleGrammar);
grammarParserParses('start: "abcd"', simpleGrammar);
});
/* Trivial character class rules are not tested. */
/* Canonical comment is "\/* comment *\/". */
test("parses comment", function() {
grammarParserParses('start:// comment\n"abcd"', simpleGrammar);
grammarParserParses('start:/* comment */"abcd"', simpleGrammar);
});
/* Canonical singleLineComment is "// comment". */
test("parses singleLineComment", function() {
grammarParserParses('start://\n"abcd"', simpleGrammar);
grammarParserParses('start://a\n"abcd"', simpleGrammar);
grammarParserParses('start://aaa\n"abcd"', simpleGrammar);
grammarParserParses('start: "abcd"//', simpleGrammar);
});
/* Canonical multiLineComment is "\/* comment *\/". */
test("parses multiLineComment", function() {
grammarParserParses('start:/**/"abcd"', simpleGrammar);
grammarParserParses('start:/*a*/"abcd"', simpleGrammar);
grammarParserParses('start:/*aaa*/"abcd"', simpleGrammar);
grammarParserParses('start:/*\n*/"abcd"', simpleGrammar);
grammarParserParses('start:/***/"abcd"', simpleGrammar);
grammarParserParses('start:/*a/*/"abcd"', simpleGrammar);
grammarParserDoesNotParse('start:/*"abcd"');
grammarParserDoesNotParse('start:/*/"abcd"');
grammarParserDoesNotParse('start:/*/**/*/"abcd"');
});
/* Canonical eol is "\n". */
test("parses eol", function() {
grammarParserParses('start:\n"abcd"', simpleGrammar);
grammarParserParses('start:\r\n"abcd"', simpleGrammar);
grammarParserParses('start:\r"abcd"', simpleGrammar);
grammarParserParses('start:\u2028"abcd"', simpleGrammar);
grammarParserParses('start:\u2029"abcd"', simpleGrammar);
});
/* Canonical eolChar is "\n". */
test("parses eolChar", function() {
grammarParserParses('start:\n"abcd"', simpleGrammar);
grammarParserParses('start:\r"abcd"', simpleGrammar);
grammarParserParses('start:\u2028"abcd"', simpleGrammar);
grammarParserParses('start:\u2029"abcd"', simpleGrammar);
});
/* Canonical whitespace is " ". */
test("parses whitespace", function() {
grammarParserParses('start:\t"abcd"', simpleGrammar);
/* IE does not recognize "\v". */
grammarParserParses('start:\x0B"abcd"', simpleGrammar);
grammarParserParses('start:\f"abcd"', simpleGrammar);
grammarParserParses('start: "abcd"', simpleGrammar);
grammarParserParses('start:\u00A0"abcd"', simpleGrammar);
grammarParserParses('start:\uFEFF"abcd"', simpleGrammar);
grammarParserParses('start:\u1680"abcd"', simpleGrammar);
grammarParserParses('start:\u180E"abcd"', simpleGrammar);
grammarParserParses('start:\u2000"abcd"', simpleGrammar);
grammarParserParses('start:\u2001"abcd"', simpleGrammar);
grammarParserParses('start:\u2002"abcd"', simpleGrammar);
grammarParserParses('start:\u2003"abcd"', simpleGrammar);
grammarParserParses('start:\u2004"abcd"', simpleGrammar);
grammarParserParses('start:\u2005"abcd"', simpleGrammar);
grammarParserParses('start:\u2006"abcd"', simpleGrammar);
grammarParserParses('start:\u2007"abcd"', simpleGrammar);
grammarParserParses('start:\u2008"abcd"', simpleGrammar);
grammarParserParses('start:\u2009"abcd"', simpleGrammar);
grammarParserParses('start:\u200A"abcd"', simpleGrammar);
grammarParserParses('start:\u202F"abcd"', simpleGrammar);
grammarParserParses('start:\u205F"abcd"', simpleGrammar);
grammarParserParses('start:\u3000"abcd"', simpleGrammar);
});
var action_ = action;
function actionGrammar(action) {
return oneRuleGrammar(action_(literal("a"), action));
}
/* Canonical grammar is "a: \"abcd\";\nb: \"efgh\";\nc: \"ijkl\";". */
test("parses grammar", function() {
grammarParserParses('a: "abcd"', { a: rule("a", null, literalAbcd) });
grammarParserParses(
'a: "abcd"\nb: "efgh"\nc: "ijkl"',
{
a: rule("a", null, literalAbcd),
b: rule("b", null, literalEfgh),
c: rule("c", null, literalIjkl)
}
);
});
/* Canonical rule is "a: \"abcd\"". */
test("parses rule", function() {
grammarParserParses(
'start: "abcd" / "efgh" / "ijkl"',
oneRuleGrammar(choiceLiterals)
);
grammarParserParses(
'start "start rule": "abcd" / "efgh" / "ijkl"',
{
start: rule("start", "start rule", choiceLiterals)
}
);
});
/* Canonical expression is "\"abcd\" / \"efgh\" / \"ijkl\"". */
test("parses expression", function() {
grammarParserParses(
'start: "abcd" / "efgh" / "ijkl"',
oneRuleGrammar(choiceLiterals)
);
});
/* Canonical choice is "\"abcd\" / \"efgh\" / \"ijkl\"". */
test("parses choice", function() {
grammarParserParses(
'start: "abcd" "efgh" "ijkl"',
oneRuleGrammar(sequenceLiterals)
);
grammarParserParses(
'start: "abcd" "efgh" "ijkl" / "abcd" "efgh" "ijkl" / "abcd" "efgh" "ijkl"',
oneRuleGrammar(choice([
sequenceLiterals,
sequenceLiterals,
sequenceLiterals
]))
);
});
/* Canonical sequence is "\"abcd\" \"efgh\" \"ijkl\"". */
test("parses sequence", function() {
grammarParserParses(
'start: { code }',
oneRuleGrammar(action(sequenceEmpty, " code "))
);
grammarParserParses(
'start: !"abcd" { code }',
oneRuleGrammar(action(notAbcd, " code "))
);
grammarParserParses(
'start: !"abcd" !"efgh" !"ijkl" { code }',
oneRuleGrammar(action(sequenceNots, " code "))
);
grammarParserParses('start: ', oneRuleGrammar(sequenceEmpty));
grammarParserParses('start: !"abcd"', oneRuleGrammar(notAbcd));
grammarParserParses(
'start: !"abcd" !"efgh" !"ijkl"',
oneRuleGrammar(sequenceNots)
);
});
/* Canonical prefixed is "!\"abcd\"". */
test("parses prefixed", function() {
grammarParserParses('start: &"abcd"?', oneRuleGrammar(andPredicate(optionalLiteral)));
grammarParserParses('start: !"abcd"?', oneRuleGrammar(notPredicate(optionalLiteral)));
grammarParserParses('start: "abcd"?', oneRuleGrammar(optionalLiteral));
});
/* Canonical suffixed is "\"abcd\"?". */
test("parses suffixed", function() {
grammarParserParses('start: "abcd"?', oneRuleGrammar(optionalLiteral));
grammarParserParses('start: "abcd"*', oneRuleGrammar(zeroOrMore(literalAbcd)));
grammarParserParses('start: "abcd"+', oneRuleGrammar(oneOrMore(literalAbcd)));
grammarParserParses('start: "abcd"', literalGrammar("abcd"));
});
/* Canonical primary is "\"abcd\"". */
test("parses primary", function() {
grammarParserParses('start: a', identifierGrammar("a"));
grammarParserParses('start: "abcd"', literalGrammar("abcd"));
grammarParserParses('start: .', anyGrammar);
grammarParserParses('start: [a-d]', classGrammar("a-d"));
grammarParserParses('start: ("abcd")', literalGrammar("abcd"));
});
/* Canonical action is "{ code }". */
test("parses action", function() {
grammarParserParses('start: "a" { code }', actionGrammar(" code "));
});
/* Canonical braced is "{ code }". */
test("parses braced", function() {
grammarParserParses('start: "a" {}', actionGrammar(""));
grammarParserParses('start: "a" {a}', actionGrammar("a"));
grammarParserParses('start: "a" {{a}}', actionGrammar("{a}"));
grammarParserParses('start: "a" {aaa}', actionGrammar("aaa"));
});
/* Trivial character rules are not tested. */
/* Canonical identifier is "a". */
test("parses identifier", function() {
grammarParserParses('start: a', identifierGrammar("a"));
grammarParserParses('start: z', identifierGrammar("z"));
grammarParserParses('start: A', identifierGrammar("A"));
grammarParserParses('start: Z', identifierGrammar("Z"));
grammarParserParses('start: _', identifierGrammar("_"));
grammarParserParses('start: $', identifierGrammar("$"));
grammarParserParses('start: aa', identifierGrammar("aa"));
grammarParserParses('start: az', identifierGrammar("az"));
grammarParserParses('start: aA', identifierGrammar("aA"));
grammarParserParses('start: aZ', identifierGrammar("aZ"));
grammarParserParses('start: a0', identifierGrammar("a0"));
grammarParserParses('start: a9', identifierGrammar("a9"));
grammarParserParses('start: a_', identifierGrammar("a_"));
grammarParserParses('start: a$', identifierGrammar("a$"));
grammarParserParses('start: abcd', identifierGrammar("abcd"));
grammarParserParses('start: a\n', identifierGrammar("a"));
});
/* Canonical literal is "\"abcd\"". */
test("parses literal", function() {
grammarParserParses('start: "abcd"', literalGrammar("abcd"));
grammarParserParses("start: 'abcd'", literalGrammar("abcd"));
});
/* Canonical doubleQuotedLiteral is "\"abcd\"". */
test("parses doubleQuotedLiteral", function() {
grammarParserParses('start: ""', literalGrammar(""));
grammarParserParses('start: "a"', literalGrammar("a"));
grammarParserParses('start: "abc"', literalGrammar("abc"));
grammarParserParses('start: "abcd"\n', literalGrammar("abcd"));
});
/* Canonical doubleQuotedCharacter is "a". */
test("parses doubleQuotedCharacter", function() {
grammarParserParses('start: "a"', literalGrammar("a"));
grammarParserParses('start: "\\n"', literalGrammar("\n"));
grammarParserParses('start: "\\0"', literalGrammar("\0"));
grammarParserParses('start: "\\x00"', literalGrammar("\x00"));
grammarParserParses('start: "\\u0120"', literalGrammar("\u0120"));
grammarParserParses('start: "\\\n"', literalGrammar("\n"));
});
/* Canonical simpleDoubleQuotedCharacter is "a". */
test("parses simpleDoubleQuotedCharacter", function() {
grammarParserParses('start: "a"', literalGrammar("a"));
grammarParserParses('start: "\'"', literalGrammar("'"));
grammarParserDoesNotParse('start: """');
grammarParserDoesNotParse('start: "\\"');
grammarParserDoesNotParse('start: "\n"');
grammarParserDoesNotParse('start: "\r"');
grammarParserDoesNotParse('start: "\u2028"');
grammarParserDoesNotParse('start: "\u2029"');
});
/* Canonical singleQuotedLiteral is "'abcd'". */
test("parses singleQuotedLiteral", function() {
grammarParserParses("start: ''", literalGrammar(""));
grammarParserParses("start: 'a'", literalGrammar("a"));
grammarParserParses("start: 'abc'", literalGrammar("abc"));
grammarParserParses("start: 'abcd'\n", literalGrammar("abcd"));
});
/* Canonical singleQuotedCharacter is "a". */
test("parses singleQuotedCharacter", function() {
grammarParserParses("start: 'a'", literalGrammar("a"));
grammarParserParses("start: '\\n'", literalGrammar("\n"));
grammarParserParses("start: '\\0'", literalGrammar("\0"));
grammarParserParses("start: '\\x00'", literalGrammar("\x00"));
grammarParserParses("start: '\\u0120'", literalGrammar("\u0120"));
grammarParserParses("start: '\\\n'", literalGrammar("\n"));
});
/* Canonical simpleSingleQuotedCharacter is "a". */
test("parses simpleSingleQuotedCharacter", function() {
grammarParserParses("start: 'a'", literalGrammar("a"));
grammarParserParses("start: '\"'", literalGrammar("\""));
grammarParserDoesNotParse("start: '''");
grammarParserDoesNotParse("start: '\\'");
grammarParserDoesNotParse("start: '\n'");
grammarParserDoesNotParse("start: '\r'");
grammarParserDoesNotParse("start: '\u2028'");
grammarParserDoesNotParse("start: '\u2029'");
});
/* Canonical class is "[a-d]". */
test("parses class", function() {
grammarParserParses("start: []", classGrammar(""));
grammarParserParses("start: [a-d]", classGrammar("a-d"));
grammarParserParses("start: [^a-d]", classGrammar("^a-d"));
grammarParserParses("start: [a]", classGrammar("a"));
grammarParserParses("start: [a-de-hi-l]", classGrammar("a-de-hi-l"));
grammarParserParses("start: [a-d]\n", classGrammar("a-d"));
});
/* Canonical classCharacterRange is "a-d". */
test("parses classCharacterRange", function() {
grammarParserParses("start: [a-d]", classGrammar("a-d"));
grammarParserParses("start: [a-a]", classGrammar("a-a"));
grammarParserDoesNotParse("start: [b-a]");
});
/* Canonical classCharacter is "a". */
test("parses classCharacter", function() {
grammarParserParses("start: [a]", classGrammar("a"));
});
/* Canonical bracketDelimitedCharacter is "a". */
test("parses bracketDelimitedCharacter", function() {
grammarParserParses("start: [a]", classGrammar("a"));
grammarParserParses("start: [\\n]", classGrammar("\\n"));
grammarParserParses("start: [\\0]", classGrammar("\\0"));
grammarParserParses("start: [\\x00]", classGrammar("\\0"));
grammarParserParses("start: [\\u0120]", classGrammar("\u0120"));
grammarParserParses("start: [\\\n]", classGrammar("\\n"));
});
/* Canonical simpleBracketDelimiedCharacter is "a". */
test("parses simpleBracketDelimitedCharacter", function() {
grammarParserParses("start: [a]", classGrammar("a"));
grammarParserParses("start: [[]", classGrammar("["));
grammarParserDoesNotParse("start: []]");
grammarParserDoesNotParse("start: [\\]");
grammarParserDoesNotParse("start: [\n]");
grammarParserDoesNotParse("start: [\r]");
grammarParserDoesNotParse("start: [\u2028]");
grammarParserDoesNotParse("start: [\u2029]");
});
/* Canonical simpleEscapeSequence is "\\n". */
test("parses simpleEscapeSequence", function() {
grammarParserParses('start: "\\\'"', literalGrammar("'"));
grammarParserParses('start: "\\""', literalGrammar("\""));
grammarParserParses('start: "\\\\"', literalGrammar("\\"));
grammarParserParses('start: "\\b"', literalGrammar("\b"));
grammarParserParses('start: "\\f"', literalGrammar("\f"));
grammarParserParses('start: "\\n"', literalGrammar("\n"));
grammarParserParses('start: "\\r"', literalGrammar("\r"));
grammarParserParses('start: "\\t"', literalGrammar("\t"));
/* IE does not recognize "\v". */
grammarParserParses('start: "\\v"', literalGrammar("\x0B"));
grammarParserParses('start: "\\a"', literalGrammar("a"));
});
/* Canonical zeroEscapeSequence is "\\0". */
test("parses zeroEscapeSequence", function() {
grammarParserParses('start: "\\0"', literalGrammar("\0"));
grammarParserDoesNotParse('start: "\\00"');
grammarParserDoesNotParse('start: "\\09"');
});
/* Canonical hexEscapeSequence is "\\x00". */
test("parses hexEscapeSequence", function() {
grammarParserParses('start: "\\x00"', literalGrammar("\x00"));
grammarParserParses('start: "\\x09"', literalGrammar("\x09"));
grammarParserParses('start: "\\x0a"', literalGrammar("\x0a"));
grammarParserParses('start: "\\x0f"', literalGrammar("\x0f"));
grammarParserParses('start: "\\x0A"', literalGrammar("\x0A"));
grammarParserParses('start: "\\x0F"', literalGrammar("\x0F"));
grammarParserDoesNotParse('start: "\\x0"');
grammarParserParses('start: "\\x000"', literalGrammar("\x000"));
});
/* Canonical unicodeEscapeSequence is "\\u0120". */
test("parses unicodeEscapeSequence", function() {
grammarParserParses('start: "\\u0120"', literalGrammar("\u0120"));
grammarParserParses('start: "\\u0129"', literalGrammar("\u0129"));
grammarParserParses('start: "\\u012a"', literalGrammar("\u012a"));
grammarParserParses('start: "\\u012f"', literalGrammar("\u012f"));
grammarParserParses('start: "\\u012A"', literalGrammar("\u012A"));
grammarParserParses('start: "\\u012F"', literalGrammar("\u012F"));
grammarParserDoesNotParse('start: "\\u012"');
grammarParserParses('start: "\\u01234"', literalGrammar("\u01234"));
});
/* Canonical eolEscapeSequence is "\\\n". */
test("parses eolEscapeSequence", function() {
grammarParserParses('start: "\\\n"', literalGrammar("\n"));
grammarParserParses('start: "\\\r\n"', literalGrammar("\r\n"));
grammarParserParses('start: "\\\r"', literalGrammar("\r"));
grammarParserParses('start: "\\\u2028"', literalGrammar("\u2028"));
grammarParserParses('start: "\\\u2029"', literalGrammar("\u2029"));
});
/* Canonical __ is "\n". */
test("parses __", function() {
grammarParserParses('start:"abcd"', simpleGrammar);
grammarParserParses('start: "abcd"', simpleGrammar);
grammarParserParses('start:\n"abcd"', simpleGrammar);
grammarParserParses('start:/* comment */"abcd"', simpleGrammar);
grammarParserParses('start: "abcd"', simpleGrammar);
});
/* Trivial character class rules are not tested. */
/* Canonical comment is "\/* comment *\/". */
test("parses comment", function() {
grammarParserParses('start:// comment\n"abcd"', simpleGrammar);
grammarParserParses('start:/* comment */"abcd"', simpleGrammar);
});
/* Canonical singleLineComment is "// comment". */
test("parses singleLineComment", function() {
grammarParserParses('start://\n"abcd"', simpleGrammar);
grammarParserParses('start://a\n"abcd"', simpleGrammar);
grammarParserParses('start://aaa\n"abcd"', simpleGrammar);
grammarParserParses('start: "abcd"//', simpleGrammar);
});
/* Canonical multiLineComment is "\/* comment *\/". */
test("parses multiLineComment", function() {
grammarParserParses('start:/**/"abcd"', simpleGrammar);
grammarParserParses('start:/*a*/"abcd"', simpleGrammar);
grammarParserParses('start:/*aaa*/"abcd"', simpleGrammar);
grammarParserParses('start:/*\n*/"abcd"', simpleGrammar);
grammarParserParses('start:/***/"abcd"', simpleGrammar);
grammarParserParses('start:/*a/*/"abcd"', simpleGrammar);
grammarParserDoesNotParse('start:/*"abcd"');
grammarParserDoesNotParse('start:/*/"abcd"');
grammarParserDoesNotParse('start:/*/**/*/"abcd"');
});
/* Canonical eol is "\n". */
test("parses eol", function() {
grammarParserParses('start:\n"abcd"', simpleGrammar);
grammarParserParses('start:\r\n"abcd"', simpleGrammar);
grammarParserParses('start:\r"abcd"', simpleGrammar);
grammarParserParses('start:\u2028"abcd"', simpleGrammar);
grammarParserParses('start:\u2029"abcd"', simpleGrammar);
});
/* Canonical eolChar is "\n". */
test("parses eolChar", function() {
grammarParserParses('start:\n"abcd"', simpleGrammar);
grammarParserParses('start:\r"abcd"', simpleGrammar);
grammarParserParses('start:\u2028"abcd"', simpleGrammar);
grammarParserParses('start:\u2029"abcd"', simpleGrammar);
});
/* Canonical whitespace is " ". */
test("parses whitespace", function() {
grammarParserParses('start:\t"abcd"', simpleGrammar);
/* IE does not recognize "\v". */
grammarParserParses('start:\x0B"abcd"', simpleGrammar);
grammarParserParses('start:\f"abcd"', simpleGrammar);
grammarParserParses('start: "abcd"', simpleGrammar);
grammarParserParses('start:\u00A0"abcd"', simpleGrammar);
grammarParserParses('start:\uFEFF"abcd"', simpleGrammar);
grammarParserParses('start:\u1680"abcd"', simpleGrammar);
grammarParserParses('start:\u180E"abcd"', simpleGrammar);
grammarParserParses('start:\u2000"abcd"', simpleGrammar);
grammarParserParses('start:\u2001"abcd"', simpleGrammar);
grammarParserParses('start:\u2002"abcd"', simpleGrammar);
grammarParserParses('start:\u2003"abcd"', simpleGrammar);
grammarParserParses('start:\u2004"abcd"', simpleGrammar);
grammarParserParses('start:\u2005"abcd"', simpleGrammar);
grammarParserParses('start:\u2006"abcd"', simpleGrammar);
grammarParserParses('start:\u2007"abcd"', simpleGrammar);
grammarParserParses('start:\u2008"abcd"', simpleGrammar);
grammarParserParses('start:\u2009"abcd"', simpleGrammar);
grammarParserParses('start:\u200A"abcd"', simpleGrammar);
grammarParserParses('start:\u202F"abcd"', simpleGrammar);
grammarParserParses('start:\u205F"abcd"', simpleGrammar);
grammarParserParses('start:\u3000"abcd"', simpleGrammar);
});
})();

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