DebugCombinators
This class enables the debug combinator on parsers.
This extension class operates on values that are convertible to parsers. It enables the use of the debug combinator, which can be used to trace the execution through a parser.
Type parameters
- P
-
the type of base value that this class is used on (the conversion to
Parsley) is summoned automatically.
Value parameters
- con
-
a conversion that allows values convertible to parsers to be used.
- p
-
the value that this class is enabling methods on.
Attributes
- Constructor
-
This constructor should not be called manually, it is designed to be used via Scala's implicit resolution.
- Source
- debug.scala
- Graph
-
- Supertypes
Members list
Value members
Concrete methods
This combinator allows this parser to be debugged by providing a trace through the execution.
This combinator allows this parser to be debugged by providing a trace through the execution.
When this combinator is entered, it will print the name assigned to the parser, as well as the current currenting input context for a few characters on either side. This parser is then executed. If it succeeded, this combinator again reports the name along with "Good" and the input context. If it failed, it reports the name along with "Bad" and the input context.
When breakpoints are used, the execution of the combinator will pause on either entry, exit, or both. The parse is resumed by entering a newline on standard input. Breakpoints will cause additional information about the internal state of the parser to be reported.
Value parameters
- break
-
The breakpoint properties of this parser, defaults to NoBreak
- coloured
-
Whether to render with colour (default true: render colours)
- name
-
The name to be assigned to this parser
Attributes
- Example
-
scala> import parsley.debug.DebugCombinators, parsley.character.string, parsley.Parsley.attempt scala> val abc = attempt(string("abc").debug("string abc")).debug("attempt") scala> val abd = string("abd").debug("string abd") scala> val p = (abc <|> abd).debug("or") scala> p.parse("abd") >or> (1, 1): abd• ^ >attempt> (1, 1): abd• ^ >string abc> (1, 1): abd• ^ <string abc< (1, 3): abd• Fail ^ <attempt< (1, 1): abd• Fail ^ >string abd> (1, 1): abd• ^ <string abd< (1, 4): abd• Good ^ <or< (1, 4): abd• Good ^ val res0 = Success("abd") - Source
- debug.scala
This combinator allows this parser to be debugged by providing a trace through the execution.
This combinator allows this parser to be debugged by providing a trace through the execution.
When this combinator is entered, it will print the name assigned to the parser, as well as the current currenting input context for a few characters on either side. This parser is then executed. If it succeeded, this combinator again reports the name along with "Good" and the input context. If it failed, it reports the name along with "Bad" and the input context.
When breakpoints are used, the execution of the combinator will pause on either entry, exit, or both. The parse is resumed by entering a newline on standard input. Breakpoints will cause additional information about the internal state of the parser to be reported.
Value parameters
- break
-
The breakpoint properties of this parser, defaults to NoBreak
- name
-
The name to be assigned to this parser
Attributes
- Example
-
scala> import parsley.debug.DebugCombinators, parsley.character.string, parsley.Parsley.attempt scala> val abc = attempt(string("abc").debug("string abc")).debug("attempt") scala> val abd = string("abd").debug("string abd") scala> val p = (abc <|> abd).debug("or") scala> p.parse("abd") >or> (1, 1): abd• ^ >attempt> (1, 1): abd• ^ >string abc> (1, 1): abd• ^ <string abc< (1, 3): abd• Fail ^ <attempt< (1, 1): abd• Fail ^ >string abd> (1, 1): abd• ^ <string abd< (1, 4): abd• Good ^ <or< (1, 4): abd• Good ^ val res0 = Success("abd")Renders in colour.
- Source
- debug.scala
This combinator allows this parser to be debugged by providing a trace through the execution.
This combinator allows this parser to be debugged by providing a trace through the execution.
When this combinator is entered, it will print the name assigned to the parser, as well as the current currenting input context for a few characters on either side. This parser is then executed. If it succeeded, this combinator again reports the name along with "Good" and the input context. If it failed, it reports the name along with "Bad" and the input context.
When breakpoints are used, the execution of the combinator will pause on either entry, exit, or both. The parse is resumed by entering a newline on standard input. Breakpoints will cause additional information about the internal state of the parser to be reported.
Value parameters
- coloured
-
Whether to render with colour
- name
-
The name to be assigned to this parser
Attributes
- Example
-
scala> import parsley.debug.DebugCombinators, parsley.character.string, parsley.Parsley.attempt scala> val abc = attempt(string("abc").debug("string abc")).debug("attempt") scala> val abd = string("abd").debug("string abd") scala> val p = (abc <|> abd).debug("or") scala> p.parse("abd") >or> (1, 1): abd• ^ >attempt> (1, 1): abd• ^ >string abc> (1, 1): abd• ^ <string abc< (1, 3): abd• Fail ^ <attempt< (1, 1): abd• Fail ^ >string abd> (1, 1): abd• ^ <string abd< (1, 4): abd• Good ^ <or< (1, 4): abd• Good ^ val res0 = Success("abd")No break-points.
- Source
- debug.scala
This combinator allows this parser to be debugged by providing a trace through the execution.
This combinator allows this parser to be debugged by providing a trace through the execution.
When this combinator is entered, it will print the name assigned to the parser, as well as the current currenting input context for a few characters on either side. This parser is then executed. If it succeeded, this combinator again reports the name along with "Good" and the input context. If it failed, it reports the name along with "Bad" and the input context.
When breakpoints are used, the execution of the combinator will pause on either entry, exit, or both. The parse is resumed by entering a newline on standard input. Breakpoints will cause additional information about the internal state of the parser to be reported.
Value parameters
- name
-
The name to be assigned to this parser
Attributes
- Example
-
scala> import parsley.debug.DebugCombinators, parsley.character.string, parsley.Parsley.attempt scala> val abc = attempt(string("abc").debug("string abc")).debug("attempt") scala> val abd = string("abd").debug("string abd") scala> val p = (abc <|> abd).debug("or") scala> p.parse("abd") >or> (1, 1): abd• ^ >attempt> (1, 1): abd• ^ >string abc> (1, 1): abd• ^ <string abc< (1, 3): abd• Fail ^ <attempt< (1, 1): abd• Fail ^ >string abd> (1, 1): abd• ^ <string abd< (1, 4): abd• Good ^ <or< (1, 4): abd• Good ^ val res0 = Success("abd")Renders in colour with no break-point.
- Source
- debug.scala
Attributes
- Source
- debug.scala
Attributes
- Source
- debug.scala