NoWhitespace
represents the absence of whitespace between elements in a grammar rules pattern.
Details
- FixedOrder[GrammarToken["a"],NoWhitespace,GrammarToken["b"]] matches a sequence that matches GrammarToken["a"] followed by GrammarToken["b"], only when there is no whitespace between them.
Examples
open all close allBasic Examples (1)
By default, FixedOrder may permit optional whitespace between its sequence of elements:
$g = CloudDeploy[GrammarRules[{FixedOrder[a : GrammarToken["Integer"], b : GrammarToken["Word"]] :> {a, b}}]];GrammarApply[$g, "42 apple"]GrammarApply[$g, "42apple"]Use NoWhitespace to disallow whitespace between the tokens:
$gnws = CloudDeploy[GrammarRules[{FixedOrder[a : GrammarToken["Integer"], NoWhitespace, b : GrammarToken["Word"]] :> {a, b}}]];GrammarApply[$gnws, "42 apple"]GrammarApply[$gnws, "42apple"]Possible Issues (1)
Application of the grammar might not observe elements if there is no natural break:
$g = CloudDeploy[GrammarRules[{FixedOrder["some", NoWhitespace, "thing"] :> "something"}]];GrammarApply[$g, "something"]Use a StringExpression instead:
$g2 = CloudDeploy[GrammarRules[{"some" ~~ "thing" :> "something"}]];GrammarApply[$g2, "something"]Text
Wolfram Research (2015), NoWhitespace, Wolfram Language function, https://reference.wolfram.com/language/ref/NoWhitespace.html.
CMS
Wolfram Language. 2015. "NoWhitespace." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/NoWhitespace.html.
APA
Wolfram Language. (2015). NoWhitespace. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/NoWhitespace.html