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179 lines
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<div class="title">Script language grammar </div> </div>
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</div><!--header-->
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<div class="contents">
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<div class="textblock"><p>This is language grammar in Backus-Naur Form (BNF).</p>
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<p>The following convention is used:</p>
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<pre>
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( ) - used for grouping
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{ } - 0 or more repetitions
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[ ] - optional
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| - or
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' ' - token
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</pre><pre>
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SCRIPT ::= {IMPORT | ENUM | TYPEDEF | CLASS | MIXIN | INTERFACE | FUNCDEF | VIRTPROP | VAR | FUNC | NAMESPACE | ';'}
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CLASS ::= {'shared' | 'abstract' | 'final' | 'external'} 'class' IDENTIFIER (';' | ([':' IDENTIFIER {',' IDENTIFIER}] '{' {VIRTPROP | FUNC | VAR | FUNCDEF} '}'))
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TYPEDEF ::= 'typedef' PRIMTYPE IDENTIFIER ';'
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NAMESPACE ::= 'namespace' IDENTIFIER '{' SCRIPT '}'
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FUNC ::= {'shared' | 'external'} ['private' | 'protected'] [((TYPE ['&']) | '~')] IDENTIFIER PARAMLIST ['const'] FUNCATTR (';' | STATBLOCK)
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INTERFACE ::= {'external' | 'shared'} 'interface' IDENTIFIER (';' | ([':' IDENTIFIER {',' IDENTIFIER}] '{' {VIRTPROP | INTFMTHD} '}'))
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VAR ::= ['private'|'protected'] TYPE IDENTIFIER [( '=' (INITLIST | EXPR)) | ARGLIST] {',' IDENTIFIER [( '=' (INITLIST | EXPR)) | ARGLIST]} ';'
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IMPORT ::= 'import' TYPE ['&'] IDENTIFIER PARAMLIST FUNCATTR 'from' STRING ';'
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ENUM ::= {'shared' | 'external'} 'enum' IDENTIFIER (';' | ('{' IDENTIFIER ['=' EXPR] {',' IDENTIFIER ['=' EXPR]} '}'))
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FUNCDEF ::= {'external' | 'shared'} 'funcdef' TYPE ['&'] IDENTIFIER PARAMLIST ';'
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VIRTPROP ::= ['private' | 'protected'] TYPE ['&'] IDENTIFIER '{' {('get' | 'set') ['const'] FUNCATTR (STATBLOCK | ';')} '}'
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MIXIN ::= 'mixin' CLASS
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INTFMTHD ::= TYPE ['&'] IDENTIFIER PARAMLIST ['const'] ';'
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STATBLOCK ::= '{' {VAR | STATEMENT} '}'
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PARAMLIST ::= '(' ['void' | (TYPE TYPEMOD [IDENTIFIER] ['=' EXPR] {',' TYPE TYPEMOD [IDENTIFIER] ['=' EXPR]})] ')'
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TYPEMOD ::= ['&' ['in' | 'out' | 'inout']]
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TYPE ::= ['const'] SCOPE DATATYPE ['<' TYPE {',' TYPE} '>'] { ('[' ']') | ('@' ['const']) }
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INITLIST ::= '{' [ASSIGN | INITLIST] {',' [ASSIGN | INITLIST]} '}'
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SCOPE ::= ['::'] {IDENTIFIER '::'} [IDENTIFIER ['<' TYPE {',' TYPE} '>'] '::']
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DATATYPE ::= (IDENTIFIER | PRIMTYPE | '?' | 'auto')
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PRIMTYPE ::= 'void' | 'int' | 'int8' | 'int16' | 'int32' | 'int64' | 'uint' | 'uint8' | 'uint16' | 'uint32' | 'uint64' | 'float' | 'double' | 'bool'
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FUNCATTR ::= {'override' | 'final' | 'explicit' | 'property'}
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STATEMENT ::= (IF | FOR | WHILE | RETURN | STATBLOCK | BREAK | CONTINUE | DOWHILE | SWITCH | EXPRSTAT | TRY)
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SWITCH ::= 'switch' '(' ASSIGN ')' '{' {CASE} '}'
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BREAK ::= 'break' ';'
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FOR ::= 'for' '(' (VAR | EXPRSTAT) EXPRSTAT [ASSIGN {',' ASSIGN}] ')' STATEMENT
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WHILE ::= 'while' '(' ASSIGN ')' STATEMENT
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DOWHILE ::= 'do' STATEMENT 'while' '(' ASSIGN ')' ';'
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IF ::= 'if' '(' ASSIGN ')' STATEMENT ['else' STATEMENT]
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CONTINUE ::= 'continue' ';'
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EXPRSTAT ::= [ASSIGN] ';'
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TRY ::= 'try' STATBLOCK 'catch' STATBLOCK
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RETURN ::= 'return' [ASSIGN] ';'
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CASE ::= (('case' EXPR) | 'default') ':' {STATEMENT}
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EXPR ::= EXPRTERM {EXPROP EXPRTERM}
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EXPRTERM ::= ([TYPE '='] INITLIST) | ({EXPRPREOP} EXPRVALUE {EXPRPOSTOP})
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EXPRVALUE ::= 'void' | CONSTRUCTCALL | FUNCCALL | VARACCESS | CAST | LITERAL | '(' ASSIGN ')' | LAMBDA
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CONSTRUCTCALL ::= TYPE ARGLIST
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EXPRPREOP ::= '-' | '+' | '!' | '++' | '--' | '~' | '@'
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EXPRPOSTOP ::= ('.' (FUNCCALL | IDENTIFIER)) | ('[' [IDENTIFIER ':'] ASSIGN {',' [IDENTIFIER ':' ASSIGN} ']') | ARGLIST | '++' | '--'
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CAST ::= 'cast' '<' TYPE '>' '(' ASSIGN ')'
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LAMBDA ::= 'function' '(' [[TYPE TYPEMOD] IDENTIFIER {',' [TYPE TYPEMOD] IDENTIFIER}] ')' STATBLOCK
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LITERAL ::= NUMBER | STRING | BITS | 'true' | 'false' | 'null'
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FUNCCALL ::= SCOPE IDENTIFIER ARGLIST
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VARACCESS ::= SCOPE IDENTIFIER
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ARGLIST ::= '(' [IDENTIFIER ':'] ASSIGN {',' [IDENTIFIER ':'] ASSIGN} ')'
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ASSIGN ::= CONDITION [ ASSIGNOP ASSIGN ]
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CONDITION ::= EXPR ['?' ASSIGN ':' ASSIGN]
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EXPROP ::= MATHOP | COMPOP | LOGICOP | BITOP
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BITOP ::= '&' | '|' | '^' | '<<' | '>>' | '>>>'
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MATHOP ::= '+' | '-' | '*' | '/' | '' | '**'
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COMPOP ::= '==' | '!=' | '<' | '<=' | '>' | '>=' | 'is' | '!is'
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LOGICOP ::= '&&' | '||' | '^^' | 'and' | 'or' | 'xor'
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ASSIGNOP ::= '=' | '+=' | '-=' | '*=' | '/=' | '|=' | '&=' | '^=' | '%=' | '**=' | '<<=' | '>>=' | '>>>='
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IDENTIFIER ::= single token: starts with letter or _, can include any letter and digit, same as in C++
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NUMBER ::= single token: includes integers and real numbers, same as C++
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STRING ::= single token: single quoted ', double quoted ", or heredoc multi-line string """
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BITS ::= single token: binary 0b or 0B, octal 0o or 0O, decimal 0d or 0D, hexadecimal 0x or 0X
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</pre> </div></div><!-- contents -->
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<li class="footer">Generated on Sat Dec 5 2020 23:20:24 for AngelScript by
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.18 </li>
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