119 lines
4.1 KiB
Plaintext
119 lines
4.1 KiB
Plaintext
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grammar Autolev;
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options {
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language = Python3;
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}
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prog: stat+;
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stat: varDecl
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| functionCall
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| codeCommands
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| massDecl
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| inertiaDecl
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| assignment
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| settings
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;
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assignment: vec equals expr #vecAssign
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| ID '[' index ']' equals expr #indexAssign
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| ID diff? equals expr #regularAssign;
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equals: ('='|'+='|'-='|':='|'*='|'/='|'^=');
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index: expr (',' expr)* ;
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diff: ('\'')+;
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functionCall: ID '(' (expr (',' expr)*)? ')'
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| (Mass|Inertia) '(' (ID (',' ID)*)? ')';
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varDecl: varType varDecl2 (',' varDecl2)*;
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varType: Newtonian|Frames|Bodies|Particles|Points|Constants
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| Specifieds|Imaginary|Variables ('\'')*|MotionVariables ('\'')*;
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varDecl2: ID ('{' INT ',' INT '}')? (('{' INT ':' INT (',' INT ':' INT)* '}'))? ('{' INT '}')? ('+'|'-')? ('\'')* ('=' expr)?;
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ranges: ('{' INT ':' INT (',' INT ':' INT)* '}');
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massDecl: Mass massDecl2 (',' massDecl2)*;
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massDecl2: ID '=' expr;
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inertiaDecl: Inertia ID ('(' ID ')')? (',' expr)+;
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matrix: '[' expr ((','|';') expr)* ']';
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matrixInOutput: (ID (ID '=' (FLOAT|INT)?))|FLOAT|INT;
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codeCommands: units
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| inputs
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| outputs
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| codegen
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| commands;
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settings: ID (EXP|ID|FLOAT|INT)?;
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units: UnitSystem ID (',' ID)*;
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inputs: Input inputs2 (',' inputs2)*;
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id_diff: ID diff?;
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inputs2: id_diff '=' expr expr?;
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outputs: Output outputs2 (',' outputs2)*;
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outputs2: expr expr?;
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codegen: ID functionCall ('['matrixInOutput (',' matrixInOutput)*']')? ID'.'ID;
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commands: Save ID'.'ID
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| Encode ID (',' ID)*;
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vec: ID ('>')+
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| '0>'
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| '1>>';
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expr: expr '^'<assoc=right> expr # Exponent
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| expr ('*'|'/') expr # MulDiv
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| expr ('+'|'-') expr # AddSub
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| EXP # exp
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| '-' expr # negativeOne
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| FLOAT # float
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| INT # int
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| ID('\'')* # id
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| vec # VectorOrDyadic
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| ID '['expr (',' expr)* ']' # Indexing
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| functionCall # function
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| matrix # matrices
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| '(' expr ')' # parens
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| expr '=' expr # idEqualsExpr
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| expr ':' expr # colon
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| ID? ranges ('\'')* # rangess
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;
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// These are to take care of the case insensitivity of Autolev.
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Mass: ('M'|'m')('A'|'a')('S'|'s')('S'|'s');
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Inertia: ('I'|'i')('N'|'n')('E'|'e')('R'|'r')('T'|'t')('I'|'i')('A'|'a');
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Input: ('I'|'i')('N'|'n')('P'|'p')('U'|'u')('T'|'t')('S'|'s')?;
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Output: ('O'|'o')('U'|'u')('T'|'t')('P'|'p')('U'|'u')('T'|'t');
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Save: ('S'|'s')('A'|'a')('V'|'v')('E'|'e');
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UnitSystem: ('U'|'u')('N'|'n')('I'|'i')('T'|'t')('S'|'s')('Y'|'y')('S'|'s')('T'|'t')('E'|'e')('M'|'m');
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Encode: ('E'|'e')('N'|'n')('C'|'c')('O'|'o')('D'|'d')('E'|'e');
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Newtonian: ('N'|'n')('E'|'e')('W'|'w')('T'|'t')('O'|'o')('N'|'n')('I'|'i')('A'|'a')('N'|'n');
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Frames: ('F'|'f')('R'|'r')('A'|'a')('M'|'m')('E'|'e')('S'|'s')?;
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Bodies: ('B'|'b')('O'|'o')('D'|'d')('I'|'i')('E'|'e')('S'|'s')?;
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Particles: ('P'|'p')('A'|'a')('R'|'r')('T'|'t')('I'|'i')('C'|'c')('L'|'l')('E'|'e')('S'|'s')?;
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Points: ('P'|'p')('O'|'o')('I'|'i')('N'|'n')('T'|'t')('S'|'s')?;
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Constants: ('C'|'c')('O'|'o')('N'|'n')('S'|'s')('T'|'t')('A'|'a')('N'|'n')('T'|'t')('S'|'s')?;
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Specifieds: ('S'|'s')('P'|'p')('E'|'e')('C'|'c')('I'|'i')('F'|'f')('I'|'i')('E'|'e')('D'|'d')('S'|'s')?;
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Imaginary: ('I'|'i')('M'|'m')('A'|'a')('G'|'g')('I'|'i')('N'|'n')('A'|'a')('R'|'r')('Y'|'y');
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Variables: ('V'|'v')('A'|'a')('R'|'r')('I'|'i')('A'|'a')('B'|'b')('L'|'l')('E'|'e')('S'|'s')?;
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MotionVariables: ('M'|'m')('O'|'o')('T'|'t')('I'|'i')('O'|'o')('N'|'n')('V'|'v')('A'|'a')('R'|'r')('I'|'i')('A'|'a')('B'|'b')('L'|'l')('E'|'e')('S'|'s')?;
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fragment DIFF: ('\'')*;
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fragment DIGIT: [0-9];
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INT: [0-9]+ ; // match integers
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FLOAT: DIGIT+ '.' DIGIT*
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| '.' DIGIT+;
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EXP: FLOAT 'E' INT
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| FLOAT 'E' '-' INT;
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LINE_COMMENT : '%' .*? '\r'? '\n' -> skip ;
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ID: [a-zA-Z][a-zA-Z0-9_]*;
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WS: [ \t\r\n&]+ -> skip ; // toss out whitespace
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