class Look - Kiuatan 1.6.1-272798c

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Kiuatan 1.6.1-272798c

class Look

Positive lookahead: will succeed if its child rule matches, but will not advance the match position.

class ref Look[S: (Any #read & Equatable[S]), optional D: Any #share, optional V: Any #share] is
  RuleNodeWithBody[S, D, V] ref

Implements¶

RuleNodeWithBody[S, D, V] ref

Constructors¶

create¶

new ref create(
  body': RuleNode[S, D, V] ref,
  action': (Action[S, D, V] val | None val) = reference)
: Look[S, D, V] ref^

Parameters¶

body': RuleNode[S, D, V] ref
action': (Action[S, D, V] val | None val) = reference

Returns¶

Look[S, D, V] ref^

Public Functions¶

action¶

fun box action()
: (Action[S, D, V] val | None val)

Returns¶

(Action[S, D, V] val | None val)

body¶

fun box body()
: (this->RuleNode[S, D, V] ref | None val)

Returns¶

(this->RuleNode[S, D, V] ref | None val)

call¶

fun box call(
  depth: USize val,
  loc: Loc[S] val)
: (_BindFrame[S, D, V] ref | _CondFrame[S, D, V] ref | _ConjFrame[S, D, V] ref | 
    _DisjFrame[S, D, V] ref | _ErrorFrame[S, D, V] ref | _LiteralFrame[S, D, V] ref | 
    _LookFrame[S, D, V] ref | _NamedRuleFrame[S, D, V] ref | _NegFrame[S, D, V] ref | 
    _SingleFrame[S, D, V] ref | _StarFrame[S, D, V] ref)

Parameters¶

depth: USize val
loc: Loc[S] val

Returns¶

(_BindFrame[S, D, V] ref | _CondFrame[S, D, V] ref | _ConjFrame[S, D, V] ref | _DisjFrame[S, D, V] ref | _ErrorFrame[S, D, V] ref | _LiteralFrame[S, D, V] ref | _LookFrame[S, D, V] ref | _NamedRuleFrame[S, D, V] ref | _NegFrame[S, D, V] ref | _SingleFrame[S, D, V] ref | _StarFrame[S, D, V] ref)