Full Grammar

Warning: This grammar is still work in progress. We aim to declare the whole Handlebars grammar here, but most features are still missing. However, feedback is always welcome. Please head over to Github to open your first issue. If you think something is wrong or could be better.

Program ::

ContentStatement

MustacheStatement

MustacheStatement[+Unescaped]

ContentStatement ::

ContentCharacter ContentStatementopt

ContentCharacter ::

NonMustacheStart

\{{

\{{{

NonMustacheStart ::

SourceCharacter but not one of MustacheStart or MustacheStart[+Unescaped]

SourceCharacter ::

any Unicode code point

MustacheStatement[Unescaped] ::

MustacheStart[?Unescaped] MustacheContents MustacheEnd[?Unescaped]

MustacheStart[Unescaped] ::

[+Unescaped]{{{

[~Unescaped]{{

MustacheEnd[Unescaped] ::

[+Unescaped]}}}

[~Unescaped]}}

MustacheContents ::

WhitespaceControlopt Whitespaceopt PathExpression MustacheParametersopt Whitespaceopt WhitespaceControlopt

WhitespaceControl :: ~

Whitespace ::

WhitespaceChar Whitespaceopt

WhitespaceChar :: one of

PathExpression ::

Id PathExpressionTailopt

PathExpressionTail ::

. PathExpression

/ PathExpression

Id ::

IdCharacter Idopt

IdCharacter ::

SourceCharacter but not one of NonIdCharacter or Whitespace

NonIdCharacter :: one of

! " # % & ' ( ) * + , . / ; < = > @ [ \ ] ^ ` { | } ~

MustacheParameters ::

Whitespace MustacheParameter MustacheParametersopt

MustacheParameter ::

Literal

PathExpression

SubExpression

Literal ::

StringLiteral

NumberLiteral

BooleanLiteral

StringLiteral ::

" AnythingExceptDoubleQuote "

' AnythingExceptSingleQuote '

AnythingExceptDoubleQuote ::

SourceCharacter but not "

AnythingExceptSingleQuote ::

SourceCharacter but not '

NumberLiteral ::

Minusopt Digits Fractionopt

Minus ::

Digits ::

Digit Digits

Digit :: one of

0 1 2 3 4 5 6 7 8 9

Fraction ::

. Digits

BooleanLiteral :: one of

true false

SubExpression ::

( Whitespaceopt PathExpression MustacheParametersopt Whitespaceopt )