class CLTK::Lexer::Environment

• CLTK::Lexer::Environment
• Reference
• Object

Overview

All actions passed to LexerCore.rule are evaluated inside an instance of the Environment class or its subclass (which must have the same name). This class provides functions for manipulating lexer state and flags. see http://carc.in/#/r/1i9

Defined in:

cltk/lexer/environment.cr

Constructors

• .new(start_state, match : Regex::MatchData | Nil = nil)

Instance Method Summary

• #clear_flags

  Unsets all flags in the current environment.

• #flags : Array(Symbol)

  @return [Array] Flags currently set in this environment.

• #match

  @return [Match] Match object generated by a rule's regular expression.

• #match=(match : Regex::MatchData | Nil)

  @return [Match] Match object generated by a rule's regular expression.

• #pop_state

  Pops a state from the state stack.

• #push_state(state)

  Pushes a new state onto the state stack.

• #set_flag(flag)

  Sets a flag in the current environment.

• #set_state(state)

  Sets the value on the top of the state stack.

• #state

  @return [Symbol] Current state of the lexing environment.

• #unset_flag(flag)

  Unsets a flag in the current environment.

Constructor Detail

Instance Method Detail