use char classes where it applies
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// Treerack syntax (self)
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// whitespace handling:
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// whitespace handling:
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wschar:alias = " " | "\t" | "\n" | "\b" | "\f" | "\r" | "\v";
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wschar:alias = [ \t\n\b\f\r\v];
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wsc:ws = wschar | comment;
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wsc:ws = wschar | comment;
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ws-no-nl:alias:nows = " " | "\t" | "\b" | "\f" | "\r" | "\v";
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ws-no-nl:alias:nows = [ \t\b\f\r\v]; // whitespace without newline
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// comments:
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// comments:
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block-comment:alias:nows = "/*" ("*" [^/] | [^*])* "*/";
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block-comment:alias:nows = "/*" ("*" [^/] | [^*])* "*/";
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