parsing expression grammar
parsing expression grammar, aka parsing expression grammar, is a grammar language created in 2002. In computer science, a parsing expression grammar, or PEG, is a type of analytic formal grammar, i.e. it describes a formal language in terms of a set of rules for recognizing strings in the language. The formalism was introduced by Bryan Ford in 2004 and is closely related to the family of top-down parsing languages introduced in the early 1970s. Read more on Wikipedia...
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- parsing expression grammar ranks in the top 25% of languages
- the parsing expression grammar wikipedia page
- parsing expression grammar first appeared in 2002
- See also: regex
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Example code from the web:
Expr ← Sum
Sum ← Product (('+' / '-') Product)*
Product ← Value (('*' / '/') Value)*
Value ← [0-9]+ / '(' Expr ')'
Example code from Wikipedia:
Value ← [0-9.]+ / '(' Expr ')'
Product ← Expr (('*' / '/') Expr)*
Sum ← Expr (('+' / '-') Expr)*
Expr ← Product / Sum / Value
Last updated January 18th, 2020