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module ::= ([COMMENT] [SAD] stmt)*
comma ::= ',' [COMMENT] [IND]
operator ::= OP0 | OR | XOR | AND | OP3 | OP4 | OP5 | OP6 | OP7
| 'is' | 'isnot' | 'in' | 'notin'
| 'div' | 'mod' | 'shl' | 'shr' | 'not'
prefixOperator ::= OP0 | OP3 | OP4 | OP5 | OP6 | OP7 | 'not'
optInd ::= [COMMENT] [IND]
optPar ::= [IND] | [SAD]
lowestExpr ::= otherExpr ('..' optInd otherExpr)*
otherExpr ::= orExpr (OP0 optInd orExpr)*
orExpr ::= andExpr (OR | 'xor' optInd andExpr)*
andExpr ::= cmpExpr ('and' optInd cmpExpr)*
cmpExpr ::= ampExpr (OP3 | 'is' | 'isnot' | 'in' | 'notin' optInd ampExpr)*
ampExpr ::= plusExpr (OP4 optInd plusExpr)*
plusExpr ::= mulExpr (OP5 optInd mulExpr)*
mulExpr ::= dollarExpr (OP6 | 'div' | 'mod' | 'shl' | 'shr' optInd dollarExpr)*
dollarExpr ::= primary (OP7 optInd primary)*
indexExpr ::= '..' [expr] | expr ['=' expr]
castExpr ::= 'cast' '[' optInd typeDesc optPar ']' '(' optInd expr optPar ')'
addrExpr ::= 'addr' '(' optInd expr optPar ')'
symbol ::= '`' (KEYWORD | IDENT | operator | '(' ')'
| '[' (',' | ['$'] '..' ['$'])* ']'
| '=' | literal)+ '`'
| IDENT
primaryPrefix ::= (prefixOperator | 'bind') optInd
primarySuffix ::= '.' optInd symbol [generalizedLit]
| '(' optInd namedExprList optPar ')'
| '[' optInd [indexExpr (comma indexExpr)* [comma]] optPar ']'
| '^'
| pragma
primary ::= primaryPrefix* (symbol [generalizedLit] |
constructor | castExpr | addrExpr)
primarySuffix*
generalizedLit ::= GENERALIZED_STR_LIT | GENERALIZED_TRIPLESTR_LIT
literal ::= INT_LIT | INT8_LIT | INT16_LIT | INT32_LIT | INT64_LIT
| FLOAT_LIT | FLOAT32_LIT | FLOAT64_LIT
| STR_LIT | RSTR_LIT | TRIPLESTR_LIT
| CHAR_LIT
| NIL
constructor ::= literal
| '[' optInd colonExprList optPar ']'
| '{' optInd ':' | colonExprList optPar '}'
| '(' optInd colonExprList optPar ')'
colonExpr ::= expr [':' expr]
colonExprList ::= [colonExpr (comma colonExpr)* [comma]]
namedExpr ::= expr ['=' expr]
namedExprList ::= [namedExpr (comma namedExpr)* [comma]]
exprOrType ::= lowestExpr
| 'if' expr ':' expr ('elif' expr ':' expr)* 'else' ':' expr
| 'var' exprOrType
| 'ref' exprOrType
| 'ptr' exprOrType
| 'type' exprOrType
| 'tuple' tupleDesc
expr ::= exprOrType
| 'proc' paramList [pragma] ['=' stmt]
exprList ::= [expr (comma expr)* [comma]]
qualifiedIdent ::= symbol ['.' symbol]
typeDesc ::= exprOrType
| 'proc' paramList [pragma]
macroStmt ::= ':' [stmt] ('of' [exprList] ':' stmt
|'elif' expr ':' stmt
|'except' exceptList ':' stmt )*
['else' ':' stmt]
simpleStmt ::= returnStmt
| yieldStmt
| discardStmt
| raiseStmt
| breakStmt
| continueStmt
| pragma
| importStmt
| fromStmt
| includeStmt
| exprStmt
complexStmt ::= ifStmt | whileStmt | caseStmt | tryStmt | forStmt
| blockStmt | asmStmt
| procDecl | iteratorDecl | macroDecl | templateDecl | methodDecl
| constSection | typeSection | whenStmt | varSection
indPush ::= IND # and push indentation onto the stack
indPop ::= # pop indentation from the stack
stmt ::= simpleStmt [SAD]
| indPush (complexStmt | simpleStmt)
([SAD] (complexStmt | simpleStmt))*
DED indPop
exprStmt ::= lowestExpr ['=' expr | [expr (comma expr)*] [macroStmt]]
returnStmt ::= 'return' [expr]
yieldStmt ::= 'yield' expr
discardStmt ::= 'discard' expr
raiseStmt ::= 'raise' [expr]
breakStmt ::= 'break' [symbol]
continueStmt ::= 'continue'
ifStmt ::= 'if' expr ':' stmt ('elif' expr ':' stmt)* ['else' ':' stmt]
whenStmt ::= 'when' expr ':' stmt ('elif' expr ':' stmt)* ['else' ':' stmt]
caseStmt ::= 'case' expr [':'] ('of' exprList ':' stmt)*
('elif' expr ':' stmt)*
['else' ':' stmt]
whileStmt ::= 'while' expr ':' stmt
forStmt ::= 'for' symbol (comma symbol)* 'in' expr ['..' expr] ':' stmt
exceptList ::= [qualifiedIdent (comma qualifiedIdent)*]
tryStmt ::= 'try' ':' stmt
('except' exceptList ':' stmt)*
['finally' ':' stmt]
asmStmt ::= 'asm' [pragma] (STR_LIT | RSTR_LIT | TRIPLESTR_LIT)
blockStmt ::= 'block' [symbol] ':' stmt
filename ::= symbol | STR_LIT | RSTR_LIT | TRIPLESTR_LIT
importStmt ::= 'import' filename (comma filename)*
includeStmt ::= 'include' filename (comma filename)*
fromStmt ::= 'from' filename 'import' symbol (comma symbol)*
pragma ::= '{.' optInd (colonExpr [comma])* optPar ('.}' | '}')
param ::= symbol (comma symbol)* (':' typeDesc ['=' expr] | '=' expr)
paramList ::= ['(' [param (comma param)*] optPar ')'] [':' typeDesc]
genericConstraint ::= 'object' | 'tuple' | 'enum' | 'proc' | 'ref' | 'ptr'
| 'var' | 'distinct' | primary
genericConstraints ::= genericConstraint ( '|' optInd genericConstraint )*
genericParam ::= symbol [':' genericConstraints] ['=' expr]
genericParams ::= '[' genericParam (comma genericParam)* optPar ']'
routineDecl := symbol ['*'] [genericParams] paramList [pragma] ['=' stmt]
procDecl ::= 'proc' routineDecl
macroDecl ::= 'macro' routineDecl
iteratorDecl ::= 'iterator' routineDecl
templateDecl ::= 'template' routineDecl
methodDecl ::= 'method' routineDecl
colonAndEquals ::= [':' typeDesc] '=' expr
constDecl ::= symbol ['*'] [pragma] colonAndEquals [COMMENT | IND COMMENT]
| COMMENT
constSection ::= 'const' indPush constDecl (SAD constDecl)* DED indPop
typeDef ::= typeDesc | objectDef | enumDef | 'distinct' typeDesc
objectField ::= symbol ['*'] [pragma]
objectIdentPart ::= objectField (comma objectField)* ':' typeDesc
[COMMENT|IND COMMENT]
objectWhen ::= 'when' expr ':' [COMMENT] objectPart
('elif' expr ':' [COMMENT] objectPart)*
['else' ':' [COMMENT] objectPart]
objectCase ::= 'case' expr ':' typeDesc [COMMENT]
('of' exprList ':' [COMMENT] objectPart)*
['else' ':' [COMMENT] objectPart]
objectPart ::= objectWhen | objectCase | objectIdentPart | 'nil'
| indPush objectPart (SAD objectPart)* DED indPop
tupleDesc ::= '[' optInd [param (comma param)*] optPar ']'
objectDef ::= 'object' [pragma] ['of' typeDesc] objectPart
enumField ::= symbol ['=' expr]
enumDef ::= 'enum' (enumField [comma] [COMMENT | IND COMMENT])+
typeDecl ::= COMMENT
| symbol ['*'] [genericParams] ['=' typeDef] [COMMENT | IND COMMENT]
typeSection ::= 'type' indPush typeDecl (SAD typeDecl)* DED indPop
colonOrEquals ::= ':' typeDesc ['=' expr] | '=' expr
varField ::= symbol ['*'] [pragma]
varPart ::= symbol (comma symbol)* colonOrEquals [COMMENT | IND COMMENT]
varSection ::= 'var' (varPart
| indPush (COMMENT|varPart)
(SAD (COMMENT|varPart))* DED indPop)
|