/**
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* This module defines a set of enum-like values intended for use as bit
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* "flags" during parsing. The ECMAScript grammar defines a number of such
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* "production parameters" to control how certain forms are parsed in context.
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* JSHint implements additional parameters to facilitate detection of lint
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* warnings.
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*
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* An equivalent implementation which described the context in terms of a
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* "lookup table" object would be more idiomatic for a JavaScript project like
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* JSHint. However, because the number of contexts scales with the number of
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* expressions in the input program, this would have non-negligible impact on
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* the process's memory footprint.
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*/
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module.exports = {
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/**
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* Enabled when parsing expressions within ES2015 "export" declarations,
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* allowing otherwise-unreferenced bindings to be considered "used".
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*/
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export: 1,
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/**
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* Enabled when parsing expressions within the head of `for` statements,
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* allowing to distinguish between `for-in` and "C-style" `for` statements.
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*/
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noin: 2,
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/**
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* Enabled when the expression begins the statement, allowing the parser to
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* correctly select between the null denotation ("nud") and first null
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* denotation ("fud") parsing strategy.
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*/
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initial: 4,
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preAsync: 8,
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async: 16,
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/**
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* Enabled when any exception thrown by the expression will be caught by a
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* TryStatement.
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*/
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tryClause: 32,
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/**
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* Enabled when parsing the body of a generator function.
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*/
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yield: 64
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};
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