initial commitHEADmain

1 files changed, 67 insertions, 0 deletions

diff --git a/src/parser/grammar.peg b/src/parser/grammar.peg
new file mode 100644
index 0000000..4bb1454
--- /dev/null
+++ b/src/parser/grammar.peg
@@ -0,0 +1,67 @@
+Program := Statement* PROGRAM_END
+
+Statement := Enum | Interface | Module | Expression
+
+Module := 'EVERYTHING' _ 'CHANGED' _ 'WHEN' _ name=PASCAL_CASE _ 'EXISTS' _ SCOPE_START _ body=ModuleBody _ SCOPE_END
+ModuleBody := Constructor? _? Declaration*
+Constructor := 'PRACTICALLY' _ 'IMPOSSIBLE' _ 'TO' _ 'HAVE' _ module=Identifier _ 'WITHOUT' _ args=ArgList _ SCOPE_START _ body=FunctionBody _ SCOPE_END
+
+Expression := FunctionCall | BinaryExpression | UnaryOperation | Literal | Declaration
+
+FunctionCall := name=Identifier _ 'OF' _ args={{Expression _? COMMA _?}* Expression}
+
+BinaryExpression := left=Expression op=BinaryOperation right=Expression
+BinaryOperation := ArithmeticOperation | ComparisonOperation | BooleanOperation
+ArithmeticOperation := '\+' | '\-' | '/' | '\%' | '\*\*' | '\*' | '>>' | '<<'
+ComparisonOperation := '<' | '>' | '<=' | '>='
+BooleanOperation := '||' | '|' | '&&' | '&'
+
+Declaration := VarDeclaration | FunctionDeclaration
+VarDeclaration := 'EXPERTS' _ 'CLAIM' _ var=CAMEL_CASE _ 'TO' _ 'BE' _ Type _ val={option=OptionMatch | 'OF' _ expr=Expression}
+OptionMatch := 'WHO' _ 'IS' _ 'DATING' _ SCOPE_START _ {some=SomeMatch _ none=NoneMatch} | {none=NoneMatch _ some=SomeMatch} _ SCOPE_END
+SomeMatch := 'Someone' LPAREN name=Identifier RPAREN _ 'SO' _ expr=Expression 
+NoneMatch := 'Nobody' _ 'SO' _ expr=Expression
+
+Literal := String | Integer | Float | StructInit | Identifier
+String := '(["\'])(?:(?=(\\?))\2.)*?\1'
+Integer := '^-?0*\d+$'
+Float := '^-?\d+(\.\d+)?$'
+
+UnaryOperation := PrefixOperation Expression | Expression PostfixOperation
+PrefixOperation := '!' | '~'
+PostfixOperation := LBRACKET index=POSITIVE_INT RBRACKET
+
+StructInit := 'STUFF' _ 'MADE' _ 'OF' _ SCOPE_START _ init=Declaration* _ SCOPE_END
+
+Type := name={PASCAL_CASE} | {name=PASCAL_CASE _ generic=Generic} | {tupleType=Type _ LBRACKET _ tupleLength=POSITIVE_INT _ RBRACKET} | union={Type _ 'OR' _ Type}
+Generic := LPAREN _? generic={{Type _? COMMA _?}* Type} RPAREN
+
+FunctionDeclaration := FunctionSignature _ SCOPE_START _ body=FunctionBody _ SCOPE_END
+FunctionBody := {Expression | ReturnStatement}*
+FunctionSignature := 'DISCOVER' _ 'HOW' _ 'TO' _ name=CAMEL_CASE _ 'WITH' _ args=ArgList _ 'GIVES' _ 'YOU' _ return=Type
+ArgList := args={{type=Type name=CAMEL_CASE COMMA _?}* type=Type name=CAMEL_CASE}
+
+ReturnStatement := 'SHOCKING' _ 'DEVELOPMENT' _ Expression
+
+Interface := 'STUFF' _ 'OF' _ name=PASCAL_CASE _ 'LOOKS' _ 'LIKE' SCOPE_START methods={ FunctionSignature* }
+
+Enum := 'ONLY' _ 'OPTIONS' _ 'OF' name=PASCAL_CASE _ 'ARE' _ SCOPE_START _ options=EnumBody* _ SCOPE_END
+EnumBody := name=Identifier COMMA
+
+Identifier := '[a-zA-Z][\w\d|\.]*'
+
+SCOPE_START := 'RUMOR' _ 'HAS' _ 'IT'
+SCOPE_END := 'END' _ 'OF' _ 'STORY'
+PROGRAM_END := 'PLEASE' _ 'LIKE' _ 'AND' _ 'SUBSCRIBE'
+PASCAL_CASE := '[A-Z][\w\d]*'
+CAMEL_CASE := '[a-z][\w\d]*'
+
+LPAREN := '\('
+RPAREN := '\)'
+LBRACKET := '\['
+RBRACKET := '\]'
+COMMA := ','
+
+POSITIVE_INT := '^[1-9][0-9]*$'
+
+_ := '\s'
\ No newline at end of file