scala.util.parsing.combinator.Parsers
An unspecified method that defines the behaviour of this parser.
Test two objects for inequality.
Test two objects for inequality.
true if !(this == that), false otherwise.
Equivalent to x.hashCode except for boxed numeric types and null.
Equivalent to x.hashCode except for boxed numeric types and null.
For numerics, it returns a hash value which is consistent
with value equality: if two value type instances compare
as true, then ## will produce the same hash value for each
of them.
For null returns a hashcode where null.hashCode throws a
NullPointerException.
a hash value consistent with ==
Returns a parser that repeatedly parses what this parser parses,
interleaved with the sep parser.
Returns a parser that repeatedly parses what this parser parses,
interleaved with the sep parser. The sep parser specifies how
the results parsed by this parser should be combined.
chainl1(this, sep)
Returns a parser that repeatedly parses what this parser parses.
Returns a parser that repeatedly parses what this parser parses.
rep(this)
Returns a parser that repeatedly (at least once) parses what this parser parses.
Returns a parser that repeatedly (at least once) parses what this parser parses.
rep1(this)
A parser combinator for sequential composition which keeps only the left result.
A parser combinator for sequential composition which keeps only the left result.
p <~ q succeeds if p succeeds and q succeeds on the input
left over by p.
a parser that will be executed after p (this parser) succeeds -- evaluated at most once, and only when necessary
a Parser that -- on success -- returns the result of p.
(Changed in version 2.9.0) The call-by-name argument is evaluated at most once per constructed Parser object, instead of on every need that arises during parsing.
<~ has lower operator precedence than ~ or ~>.
Test two objects for equality.
Test two objects for equality.
The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).
true if the receiver object is equivalent to the argument; false otherwise.
Returns into(fq).
Returns a parser that optionally parses what this parser parses.
Returns a parser that optionally parses what this parser parses.
opt(this)
A parser combinator for partial function application.
A parser combinator for partial function application.
p ^? f succeeds if p succeeds AND f is defined at the result of p;
in that case, it returns f applied to the result of p.
a partial function that will be applied to this parser's result
(see mapPartial in ParseResult).
a parser that succeeds if the current parser succeeds and f is applicable
to the result. If so, the result will be transformed by f.
A parser combinator for partial function application.
A parser combinator for partial function application.
p ^? (f, error) succeeds if p succeeds AND f is defined at the result of p;
in that case, it returns f applied to the result of p. If f is not applicable,
error(the result of p) should explain why.
a partial function that will be applied to this parser's result
(see mapPartial in ParseResult).
a function that takes the same argument as f and produces an error message
to explain why f wasn't applicable
a parser that succeeds if the current parser succeeds and f is applicable
to the result. If so, the result will be transformed by f.
A parser combinator for function application.
A parser combinator for function application.
p ^^ f succeeds if p succeeds; it returns f applied to the result of p.
a function that will be applied to this parser's result (see map in ParseResult).
a parser that has the same behaviour as the current parser, but whose result is
transformed by f.
A parser combinator that changes a successful result into the specified value.
A parser combinator that changes a successful result into the specified value.
p ^^^ v succeeds if p succeeds; discards its result, and returns v instead.
The new result for the parser, evaluated at most once (if p succeeds), not evaluated at all if p fails.
a parser that has the same behaviour as the current parser, but whose successful result is v
(Changed in version 2.9.0) The call-by-name argument is evaluated at most once per constructed Parser object, instead of on every need that arises during parsing.
Composes two instances of Function1 in a new Function1, with this function applied first.
Composes two instances of Function1 in a new Function1, with this function applied first.
the result type of function g
a function R => A
a new function f such that f(x) == g(apply(x))
(Changed in version 2.9.0) The call-by-name argument is evaluated at most once per constructed Parser object, instead of on every need that arises during parsing.
Cast the receiver object to be of type T0.
Cast the receiver object to be of type T0.
Note that the success of a cast at runtime is modulo Scala's erasure semantics.
Therefore the expression 1.asInstanceOf[String] will throw a ClassCastException at
runtime, while the expression List(1).asInstanceOf[List[String]] will not.
In the latter example, because the type argument is erased as part of compilation it is
not possible to check whether the contents of the list are of the requested type.
the receiver object.
if the receiver object is not an instance of the erasure of type T0.
Create a copy of the receiver object.
Composes two instances of Function1 in a new Function1, with this function applied last.
Composes two instances of Function1 in a new Function1, with this function applied last.
the type to which function g can be applied
a function A => T1
a new function f such that f(x) == apply(g(x))
Tests whether the argument (arg0) is a reference to the receiver object (this).
Tests whether the argument (arg0) is a reference to the receiver object (this).
The eq method implements an equivalence relation on
non-null instances of AnyRef, and has three additional properties:
x and y of type AnyRef, multiple invocations of
x.eq(y) consistently returns true or consistently returns false.x of type AnyRef, x.eq(null) and null.eq(x) returns false.null.eq(null) returns true. When overriding the equals or hashCode methods, it is important to ensure that their behavior is
consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they
should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).
true if the argument is a reference to the receiver object; false otherwise.
The equality method for reference types.
Called by the garbage collector on the receiver object when there are no more references to the object.
Called by the garbage collector on the receiver object when there are no more references to the object.
The details of when and if the finalize method is invoked, as
well as the interaction between finalize and non-local returns
and exceptions, are all platform dependent.
Returns string formatted according to given format string.
Returns string formatted according to given format string.
Format strings are as for String.format
(@see java.lang.String.format).
A representation that corresponds to the dynamic class of the receiver object.
A representation that corresponds to the dynamic class of the receiver object.
The nature of the representation is platform dependent.
a representation that corresponds to the dynamic class of the receiver object.
not specified by SLS as a member of AnyRef
The hashCode method for reference types.
A parser combinator that parameterizes a subsequent parser with the result of this one.
A parser combinator that parameterizes a subsequent parser with the result of this one.
Use this combinator when a parser depends on the result of a previous
parser. p should be a function that takes the result from the first
parser and returns the second parser.
p into fq (with fq typically {x => q}) first applies p, and
then, if p successfully returned result r, applies fq(r) to the
rest of the input.
From: G. Hutton. Higher-order functions for parsing. J. Funct. Program., 2(3):323--343, 1992.
a function that, given the result from this parser, returns the second parser to be applied
a parser that succeeds if this parser succeeds (with result x)
and if then fq(x) succeeds
def perlRE = "m" ~> (".".r into (separator => """[^%s]*""".format(separator).r <~ separator))
Test whether the dynamic type of the receiver object is T0.
Test whether the dynamic type of the receiver object is T0.
Note that the result of the test is modulo Scala's erasure semantics.
Therefore the expression 1.isInstanceOf[String] will return false, while the
expression List(1).isInstanceOf[List[String]] will return true.
In the latter example, because the type argument is erased as part of compilation it is
not possible to check whether the contents of the list are of the specified type.
true if the receiver object is an instance of erasure of type T0; false otherwise.
Equivalent to !(this eq that).
Equivalent to !(this eq that).
true if the argument is not a reference to the receiver object; false otherwise.
Wakes up a single thread that is waiting on the receiver object's monitor.
Wakes up a single thread that is waiting on the receiver object's monitor.
not specified by SLS as a member of AnyRef
Wakes up all threads that are waiting on the receiver object's monitor.
Wakes up all threads that are waiting on the receiver object's monitor.
not specified by SLS as a member of AnyRef
Creates a String representation of this object.
Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.
a String representation of the object.
Changes the error message produced by a parser.
Changes the error message produced by a parser.
This doesn't change the behavior of a parser on neither
success nor failure, just on error. The semantics are
slightly different than those obtained by doing | error(msg),
in that the message produced by this method will always
replace the message produced, which is not guaranteed
by that idiom.
For example, parser p below will always produce the
designated error message, while q will not produce
it if sign is parsed but number is not.
def p = sign.? ~ number withErrorMessage "Number expected!" def q = sign.? ~ number | error("Number expected!")
The message that will replace the default error message.
A parser with the same properties and different error message.
Changes the failure message produced by a parser.
Changes the failure message produced by a parser.
This doesn't change the behavior of a parser on neither
success nor error, just on failure. The semantics are
slightly different than those obtained by doing | failure(msg),
in that the message produced by this method will always
replace the message produced, which is not guaranteed
by that idiom.
For example, parser p below will always produce the
designated failure message, while q will not produce
it if sign is parsed but number is not.
def p = sign.? ~ number withFailureMessage "Number expected!" def q = sign.? ~ number | failure("Number expected!")
The message that will replace the default failure message.
A parser with the same properties and different failure message.
A parser combinator for alternative composition.
A parser combinator for alternative composition.
p | q succeeds if p succeeds or q succeeds.
Note that q is only tried if ps failure is non-fatal (i.e., back-tracking is allowed).
a parser that will be executed if p (this parser) fails (and allows back-tracking)
a Parser that returns the result of the first parser to succeed (out of p and q)
The resulting parser succeeds if (and only if)
p succeeds, orp fails allowing back-tracking and q succeeds.
A parser combinator for alternative with longest match composition.
A parser combinator for alternative with longest match composition.
p ||| q succeeds if p succeeds or q succeeds.
If p and q both succeed, the parser that consumed the most characters accepts.
a parser that accepts if p consumes less characters. -- evaluated at most once, and only when necessary
a Parser that returns the result of the parser consuming the most characters (out of p and q).
(Changed in version 2.9.0) The call-by-name argument is evaluated at most once per constructed Parser object, instead of on every need that arises during parsing.
A parser combinator for sequential composition.
A parser combinator for sequential composition.
p ~ q succeeds if p succeeds and q succeeds on the input left over by p.
a parser that will be executed after p (this parser)
succeeds -- evaluated at most once, and only when necessary.
a Parser that -- on success -- returns a ~ (like a Pair,
but easier to pattern match on) that contains the result of p and
that of q. The resulting parser fails if either p or q fails.
(Changed in version 2.9.0) The call-by-name argument is evaluated at most once per constructed Parser object, instead of on every need that arises during parsing.
A parser combinator for non-back-tracking sequential composition.
A parser combinator for non-back-tracking sequential composition.
p ~! q succeeds if p succeeds and q succeeds on the input left over by p.
In case of failure, no back-tracking is performed (in an earlier parser produced by the | combinator).
a parser that will be executed after p (this parser) succeeds
a Parser that -- on success -- returns a ~ (like a Pair, but easier to pattern match on)
that contains the result of p and that of q.
The resulting parser fails if either p or q fails, this failure is fatal.
A parser combinator for sequential composition which keeps only the right result.
A parser combinator for sequential composition which keeps only the right result.
p ~> q succeeds if p succeeds and q succeeds on the input left over by p.
a parser that will be executed after p (this parser)
succeeds -- evaluated at most once, and only when necessary.
a Parser that -- on success -- returns the result of q.
(Changed in version 2.9.0) The call-by-name argument is evaluated at most once per constructed Parser object, instead of on every need that arises during parsing.
(parser: StringAdd).+(other)
(parser: StringAdd).self
(parser: StringFormat).self
(parser: ArrowAssoc[Parser[T]]).x
(Since version 2.10.0) Use leftOfArrow instead
(parser: Ensuring[Parser[T]]).x
(Since version 2.10.0) Use resultOfEnsuring instead
The root class of parsers. Parsers are functions from the Input type to ParseResult.