prog8/il65/antlr/il65.g4

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/*
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IL65 combined lexer and parser grammar
NOTES:
- whitespace is ignored. (tabs/spaces)
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- every position can be empty, be a comment, or contain ONE statement.
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*/
grammar il65;
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LINECOMMENT : [\r\n][ \t]* COMMENT -> channel(HIDDEN);
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COMMENT : ';' ~[\r\n]* -> channel(HIDDEN) ;
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WS : [ \t] -> skip ;
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EOL : [\r\n]+ ;
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NAME : [a-zA-Z_][a-zA-Z0-9_]* ;
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DEC_INTEGER : ('0'..'9') | (('1'..'9')('0'..'9')+);
HEX_INTEGER : '$' (('a'..'f') | ('A'..'F') | ('0'..'9'))+ ;
BIN_INTEGER : '%' ('0' | '1')+ ;
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FLOAT_NUMBER : FNUMBER (('E'|'e') ('+' | '-')? FNUMBER)? ; // sign comes later from unary expression
fragment FNUMBER : ('0' .. '9') + ('.' ('0' .. '9') +)? ;
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fragment STRING_ESCAPE_SEQ : '\\' . | '\\' EOL;
STRING :
'"' ( STRING_ESCAPE_SEQ | ~[\\\r\n\f"] )* '"'
{
// get rid of the enclosing quotes
String s = getText();
setText(s.substring(1, s.length() - 1));
}
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;
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INLINEASMBLOCK :
'{{' .+? '}}'
{
// get rid of the enclosing double braces
String s = getText();
setText(s.substring(2, s.length() - 2));
}
;
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module : (modulestatement | EOL)* EOF ;
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modulestatement: directive | block ;
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block:
'~' identifier integerliteral? '{' EOL
(statement | EOL)*
'}' EOL
;
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statement :
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directive
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| varinitializer
| vardecl
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| constdecl
| memoryvardecl
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| assignment
| augassignment
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| unconditionaljump
| postincrdecr
| inlineasm
| label
// @todo forloop, whileloop, repeatloop, ifelse
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;
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label : identifier ':' ;
call_location : integerliteral | identifier | scoped_identifier ;
unconditionaljump : 'goto' call_location ;
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directive :
directivename=('%output' | '%launcher' | '%zp' | '%address' | '%import' |
'%breakpoint' | '%asminclude' | '%asmbinary')
(directivearg? | directivearg (',' directivearg)*)
;
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directivearg : stringliteral | identifier | integerliteral ;
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vardecl: datatype arrayspec? identifier ;
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varinitializer : datatype arrayspec? identifier '=' expression ;
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constdecl: 'const' varinitializer ;
memoryvardecl: 'memory' varinitializer;
datatype: 'byte' | 'word' | 'float' | 'str' | 'str_p' | 'str_s' | 'str_ps' ;
arrayspec: '[' expression (',' expression)? ']' ;
assignment : assign_target '=' expression ;
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augassignment :
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assign_target operator=('+=' | '-=' | '/=' | '//=' | '*=' | '**=' |
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'<<=' | '>>=' | '<<@=' | '>>@=' | '&=' | '|=' | '^=') expression
;
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assign_target:
register
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| identifier
| scoped_identifier
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;
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postincrdecr : assign_target operator = ('++' | '--') ;
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expression :
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'(' expression ')'
| expression arrayspec
| functioncall
| prefix = ('+'|'-') expression
| prefix = ('~'|'not') expression
| left = expression bop = '**' right = expression
| left = expression bop = ('*' | '/' | '//' | '%') right = expression
| left = expression bop = ('+' | '-' ) right = expression
| left = expression bop = ('<<' | '>>' | '<<@' | '>>@' ) right = expression
| left = expression bop = ('<' | '>' | '<=' | '>=') right = expression
| left = expression bop = ('==' | '!=') right = expression
| left = expression bop = '&' right = expression
| left = expression bop = '^' right = expression
| left = expression bop = '|' right = expression
| left = expression bop = 'and' right = expression
| left = expression bop = 'or' right = expression
| left = expression bop = 'xor' right = expression
| rangefrom = expression 'to' rangeto = expression
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| literalvalue
| register
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| identifier
| scoped_identifier
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;
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functioncall :
call_location '(' expression? ')' // @todo arglist
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;
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identifier : NAME ;
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scoped_identifier : NAME ('.' NAME)+ ;
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register : 'A' | 'X' | 'Y' | 'AX' | 'AY' | 'XY' | 'SC' | 'SI' | 'SZ' ;
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integerliteral : DEC_INTEGER | HEX_INTEGER | BIN_INTEGER ;
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booleanliteral : 'true' | 'false' ;
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arrayliteral : '[' expression (',' expression)* ']' ;
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stringliteral : STRING ;
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floatliteral : FLOAT_NUMBER ;
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literalvalue :
integerliteral
| booleanliteral
| arrayliteral
| stringliteral
| floatliteral
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;
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inlineasm : '%asm' INLINEASMBLOCK;