Browsable FL Grammar

Grammar extracted by Vadim Zaytsev, see the Grammar Zoo entry for details: toy/fl/concrete/txl/extracted
Source used for this grammar: Vadim Zaytsev, FL.Txl, 6–7 Jul 2009 [Explore]

Summary

• Total 4 production rules with 11 top alternatives and 43 symbols.
• Vocabulary: 16 = 7 nonterminals + 9 terminals + 0 labels + 0 markers.
• Total 7 nonterminal symbols: 4 defined (program, fun, expression, op), 1 root (program), 0 top (—), 3 bottom (id ⁴, newline, number).
• Total 9 terminal symbols: 3 keywords ("if", "then", "else"), 0 letters (—), 0 numerics (—), 6 signs ("=", "(", ")", "+", "-", "==").

Syntax

program ::=
	fun+

fun ::=
	id id+ "=" expression newline

expression ::=
	expression op expression
	id expression+
	"if" expression "then" expression "else" expression
	"(" expression ")"
	id
	number

op ::=
	"+"
	"-"
	"=="

Maintained by Dr. Vadim Zaytsev a.k.a. @grammarware. Last updated in September 2015. [↑]