Parsers class
Here in, the parsing rules/functions
The basic structure of the syntax tree generated is as follows:
Ruleset -> Declaration -> Value -> Expression -> Entity
Here's some Less code:
.class {
color: #fff;
border: 1px solid #000;
width: @w + 4px;
> .child {...}
}
And here's what the parse tree might look like:
Ruleset (Selector '.class', [
Declaration ("color", Value ([Expression [Color #fff]]))
Declaration ("border", Value ([Expression [Dimension 1px][Keyword "solid"][Color #000]]))
Declaration ("width", Value ([Expression [Operation "+" [Variable "@w"][Dimension 4px]]]))
Ruleset (Selector [Element '>', '.child'], [...])
])
In general, most rules will try to parse a token with the $re() function, and if the return
value is truly, will return a new node, of the relevant type. Sometimes, we need to check
first, before parsing, that's when we use peek().
Constructors
Properties
- context ↔ Contexts
-
Environment variables
read / write
- entities ↔ Entities
-
Reference to Entities class with additional parser functions
read / write
- fileInfo ↔ FileInfo
-
Data about the file being parsed
read / write
- input ↔ String
-
String to be parsed
read / write
- mixin ↔ Mixin
-
Mixin class reference with additional parser functions
read / write
- parserInput ↔ ParserInput
-
Input management
read / write
- hashCode → int
-
The hash code for this object.
read-only, inherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Methods
-
addition(
) → Node - Search for: [...]
-
anonymousValue(
) → Anonymous - Anonymous is almost anything. Example: [...]
-
apply(
) → Apply - Search for something like: [...]
-
atomicCondition(
{bool needsParens: false }) → Condition - The simplest condition, such as [...]
-
atrule(
) → Node - A CSS AtRule, such as: [...]
-
attribute(
) → Attribute -
Attribute is a operation inside
[]: [...] -
block(
) → List< Node> -
The
blockrule is used byrulesetandmixin.definition. [...] -
blockRuleset(
) → Ruleset - The rules inside the: [...]
-
combinator(
) → Combinator - Combinators combine elements together, in a Selector. [...]
-
comment(
) → Comment - Comments are collected by the main parsing mechanism and then assigned to nodes where the current structure allows it [...]
-
condition(
{bool needsParens: false }) → Condition - Inside a MixinDefinition, conditions such as when, and, or, not, ... [...]
-
conditionAnd(
{bool needsParens: false }) → Condition - Search for conditions such as: [...]
-
conditions(
) → Node - Function to be passed to ParserInput.expect(). [...]
-
declaration(
) → Declaration - Declaration is [...]
-
detachedRuleset(
) → Node - Search for [...]
-
element(
) → Element - A Selector Element [...]
-
end(
) → bool - A Declaration terminator. [...]
-
entity(
) → Node - Entities are the smallest recognized token, and can be found inside a rule's value.
-
expression(
) → Expression - Expressions either represent mathematical operations, or white-space delimited Entities. [...]
-
extend(
{bool isRule: false }) → List< Extend> - extend syntax - used to extend selectors: [...]
-
extendRule(
) → List< Extend> - extendRule - used in a rule to extend all the parent selectors
-
getDebugInfo(
int index, [ String xinputStream, Contexts xcontext ]) → DebugInfo -
Returns filename and line corresponding to
index -
import(
) → Import - An @import atrule [...]
-
important(
) → String - Search for: [...]
-
importOption(
) → String - The option in @import(option). Example: [...]
-
importOptions(
) → ImportOptions - For @import(options) returns the activated options. Example: [...]
-
isFinished(
) → void - Check if input is empty. Else throw error.
-
media(
) → Media - Search for something like: [...]
-
mediaFeature(
) → Expression - Search for something like: [...]
-
mediaFeatures(
) → List< Node> - Search for a list of mediaFeature, such as: [...]
-
multiplication(
) → Node - Search for: [...]
-
negatedCondition(
{bool needsParens: false }) → Condition - Search for conditions such as: [...]
-
operand(
) → Node - An operand is anything that can be part of an operation. [...]
-
options(
) → Options - Search for something like: [...]
-
parenthesisCondition(
{bool needsParens: false }) → Condition - Search for a condition inside a parenthesis: [...]
-
permissiveValue(
{String untilTokensString, RegExp untilTokensRegExp }) → Node - Used for custom properties, at-rules, and variables (as fallback) Parses almost anything inside of {} [] () "" blocks until it reaches outer-most tokens. [...]
-
plugin(
) → Options - A @plugin directive, used to import plugins dynamically. [...]
-
pluginArgs(
) → String - list of options, surrounded by parens, to be processed by the plugin. [...]
-
primary(
) → List< Node> -
The
primaryrule is the entry and exit point of the parser. The rules here can appear at any level of the parse tree. [...] -
property(
) → String - Something like: [...]
-
ruleProperty(
) → List< Node> - Search for something like: [...]
-
ruleset(
) → Ruleset - A Ruleset is something like: [...]
-
selector(
{bool isLess: true }) → Selector - A CSS Selector [...]
-
selectors(
) → List< Selector> -
sub(
) → Expression - Search for parens subexpressions like: [...]
-
value(
) → Value - A Value is a comma-delimited list of Expressions [...]
-
variable(
) → String -
The variable part of a variable definition. Used in the
ruleparser [...] -
variableCall(
[String parsedName ]) → Node - Call a variable value to retrieve a detached ruleset or a value from a detached ruleset's rules. [...]
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited
-
toString(
) → String -
Returns a string representation of this object.
inherited
Operators
-
operator ==(
dynamic other) → bool -
The equality operator.
inherited