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Cleanup grammar.

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pull/3/head
yhirose 9 years ago
parent 8f585f958e
commit ff6231bcbe
2 changed files with 80 additions and 86 deletions
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  1. 83
      grammar/culebra.peg
  2. 83
      language/parser.cc

83
grammar/culebra.peg
Unescape View File

@ -1,59 +1,56 @@
PROGRAM <- _ STATEMENTS
PROGRAM <- _ STATEMENTS
STATEMENTS <- (EXPRESSION (';' _)?)*
STATEMENTS <- (EXPRESSION (';' _)?)*
EXPRESSION <- ASSIGNMENT / LOGICAL_OR
ASSIGNMENT <- MUTABLE IDENTIFIER '=' _ EXPRESSION
WHILE <- 'while' _ EXPRESSION BLOCK
IF <- 'if' _ EXPRESSION BLOCK ('else' _ 'if' _ EXPRESSION BLOCK)* ('else' _ BLOCK)?
EXPRESSION <- ASSIGNMENT / LOGICAL_OR
ASSIGNMENT <- MUTABLE IDENTIFIER '=' _ EXPRESSION
WHILE <- 'while' _ EXPRESSION BLOCK
IF <- 'if' _ EXPRESSION BLOCK ('else' _ 'if' _ EXPRESSION BLOCK)* ('else' _ BLOCK)?
LOGICAL_OR <- LOGICAL_AND ('||' _ LOGICAL_AND)*
LOGICAL_AND <- CONDITION ('&&' _ CONDITION)*
CONDITION <- ADDITIVE (CONDITION_OPERATOR ADDITIVE)*
ADDITIVE <- UNARY_PLUS (ADDITIVE_OPERATOR UNARY_PLUS)*
UNARY_PLUS <- UNARY_PLUS_OPERATOR? UNARY_MINUS
UNARY_MINUS <- UNARY_MINUS_OPERATOR? UNARY_NOT
UNARY_NOT <- UNARY_NOT_OPERATOR? MULTIPLICATIVE
MULTIPLICATIVE <- CALL (MULTIPLICATIVE_OPERATOR CALL)*
LOGICAL_OR <- LOGICAL_AND ('||' _ LOGICAL_AND)*
LOGICAL_AND <- CONDITION ('&&' _ CONDITION)*
CONDITION <- ADDITIVE (CONDITION_OPERATOR ADDITIVE)*
ADDITIVE <- UNARY_PLUS (ADDITIVE_OPERATOR UNARY_PLUS)*
UNARY_PLUS <- UNARY_PLUS_OPERATOR? UNARY_MINUS
UNARY_MINUS <- UNARY_MINUS_OPERATOR? UNARY_NOT
UNARY_NOT <- UNARY_NOT_OPERATOR? MULTIPLICATIVE
MULTIPLICATIVE <- CALL (MULTIPLICATIVE_OPERATOR CALL)*
CALL <- PRIMARY (ARGUMENTS / INDEX)*
CALL <- PRIMARY (ARGUMENTS / INDEX)*
ARGUMENTS <- '(' _ (EXPRESSION (',' _ EXPRESSION)*)? ')' _
INDEX <- '[' _ EXPRESSION ']' _
#FUNCTION_CALL <- IDENTIFIER ARGUMENTS
ARGUMENTS <- '(' _ (EXPRESSION (',' _ EXPRESSION)*)? ')' _
#ARRAY_REFERENCE <- IDENTIFIER INDEX
INDEX <- '[' _ EXPRESSION ']' _
PRIMARY <- WHILE / IF / FUNCTION / IDENTIFIER / ARRAY / NUMBER / BOOLEAN / STRING / INTERPOLATED_STRING / '(' _ EXPRESSION ')' _
PRIMARY <- WHILE / IF / FUNCTION / IDENTIFIER / ARRAY / NUMBER / BOOLEAN / STRING / INTERPOLATED_STRING / '(' _ EXPRESSION ')' _
FUNCTION <- 'fn' _ PARAMETERS BLOCK
PARAMETERS <- '(' _ (PARAMETER (',' _ PARAMETER)*)? ')' _
PARAMETER <- MUTABLE IDENTIFIER
FUNCTION <- 'fn' _ PARAMETERS BLOCK
PARAMETERS <- '(' _ (PARAMETER (',' _ PARAMETER)*)? ')' _
PARAMETER <- MUTABLE IDENTIFIER
BLOCK <- '{' _ STATEMENTS '}' _
BLOCK <- '{' _ STATEMENTS '}' _
CONDITION_OPERATOR <- < ('==' / '!=' / '<=' / '<' / '>=' / '>') > _
ADDITIVE_OPERATOR <- < [-+] > _
UNARY_PLUS_OPERATOR <- < '+' > _
UNARY_MINUS_OPERATOR <- < '-' > _
UNARY_NOT_OPERATOR <- < '!' > _
CONDITION_OPERATOR <- < ('==' / '!=' / '<=' / '<' / '>=' / '>') > _
ADDITIVE_OPERATOR <- < [-+] > _
UNARY_PLUS_OPERATOR <- < '+' > _
UNARY_MINUS_OPERATOR <- < '-' > _
UNARY_NOT_OPERATOR <- < '!' > _
MULTIPLICATIVE_OPERATOR <- < [*/%] > _
IDENTIFIER <- < [a-zA-Z_][a-zA-Z0-9_]* > _
IDENTIFIER <- < [a-zA-Z_][a-zA-Z0-9_]* > _
ARRAY <- '[' _ (EXPRESSION (',' _ EXPRESSION)*) ']' _
NUMBER <- < [0-9]+ > _
BOOLEAN <- < ('true' / 'false') > _
STRING <- ['] < (!['] .)* > ['] _
ARRAY <- '[' _ (EXPRESSION (',' _ EXPRESSION)*) ']' _
NUMBER <- < [0-9]+ > _
BOOLEAN <- < ('true' / 'false') > _
STRING <- ['] < (!['] .)* > ['] _
INTERPOLATED_STRING <- '"' ('{' _ EXPRESSION '}' / INTERPOLATED_CONTENT)* '"' _
INTERPOLATED_CONTENT <- (!["{] .) (!["{] .)*
INTERPOLATED_STRING <- '"' ('{' _ EXPRESSION '}' / INTERPOLATED_CONTENT)* '"' _
INTERPOLATED_CONTENT <- (!["{] .) (!["{] .)*
MUTABLE <- < 'mut'? > _
MUTABLE <- < 'mut'? > _
~_ <- (Space / EndOfLine / Comment)*
Space <- ' ' / '\t'
EndOfLine <- '\r\n' / '\n' / '\r'
EndOfFile <- !.
Comment <- '/*' (!'*/' .)* '*/' / ('#' / '//') (!(EndOfLine / EndOfFile) .)* (EndOfLine / EndOfFile)
~_ <- (Space / EndOfLine / Comment)*
Space <- ' ' / '\t'
EndOfLine <- '\r\n' / '\n' / '\r'
EndOfFile <- !.
Comment <- '/*' (!'*/' .)* '*/' / ('#' / '//') (!(EndOfLine / EndOfFile) .)* (EndOfLine / EndOfFile)

83
language/parser.cc
Unescape View File

@ -5,63 +5,60 @@ using namespace std;
static auto g_grammar = R"(
PROGRAM <- _ STATEMENTS
PROGRAM <- _ STATEMENTS
STATEMENTS <- (EXPRESSION (';' _)?)*
STATEMENTS <- (EXPRESSION (';' _)?)*
EXPRESSION <- ASSIGNMENT / LOGICAL_OR
ASSIGNMENT <- MUTABLE IDENTIFIER '=' _ EXPRESSION
WHILE <- 'while' _ EXPRESSION BLOCK
IF <- 'if' _ EXPRESSION BLOCK ('else' _ 'if' _ EXPRESSION BLOCK)* ('else' _ BLOCK)?
EXPRESSION <- ASSIGNMENT / LOGICAL_OR
ASSIGNMENT <- MUTABLE IDENTIFIER '=' _ EXPRESSION
WHILE <- 'while' _ EXPRESSION BLOCK
IF <- 'if' _ EXPRESSION BLOCK ('else' _ 'if' _ EXPRESSION BLOCK)* ('else' _ BLOCK)?
LOGICAL_OR <- LOGICAL_AND ('||' _ LOGICAL_AND)*
LOGICAL_AND <- CONDITION ('&&' _ CONDITION)*
CONDITION <- ADDITIVE (CONDITION_OPERATOR ADDITIVE)*
ADDITIVE <- UNARY_PLUS (ADDITIVE_OPERATOR UNARY_PLUS)*
UNARY_PLUS <- UNARY_PLUS_OPERATOR? UNARY_MINUS
UNARY_MINUS <- UNARY_MINUS_OPERATOR? UNARY_NOT
UNARY_NOT <- UNARY_NOT_OPERATOR? MULTIPLICATIVE
MULTIPLICATIVE <- CALL (MULTIPLICATIVE_OPERATOR CALL)*
LOGICAL_OR <- LOGICAL_AND ('||' _ LOGICAL_AND)*
LOGICAL_AND <- CONDITION ('&&' _ CONDITION)*
CONDITION <- ADDITIVE (CONDITION_OPERATOR ADDITIVE)*
ADDITIVE <- UNARY_PLUS (ADDITIVE_OPERATOR UNARY_PLUS)*
UNARY_PLUS <- UNARY_PLUS_OPERATOR? UNARY_MINUS
UNARY_MINUS <- UNARY_MINUS_OPERATOR? UNARY_NOT
UNARY_NOT <- UNARY_NOT_OPERATOR? MULTIPLICATIVE
MULTIPLICATIVE <- CALL (MULTIPLICATIVE_OPERATOR CALL)*
CALL <- PRIMARY (ARGUMENTS / INDEX)*
CALL <- PRIMARY (ARGUMENTS / INDEX)*
ARGUMENTS <- '(' _ (EXPRESSION (',' _ EXPRESSION)*)? ')' _
INDEX <- '[' _ EXPRESSION ']' _
#FUNCTION_CALL <- IDENTIFIER ARGUMENTS
ARGUMENTS <- '(' _ (EXPRESSION (',' _ EXPRESSION)*)? ')' _
#ARRAY_REFERENCE <- IDENTIFIER INDEX
INDEX <- '[' _ EXPRESSION ']' _
PRIMARY <- WHILE / IF / FUNCTION / IDENTIFIER / ARRAY / NUMBER / BOOLEAN / STRING / INTERPOLATED_STRING / '(' _ EXPRESSION ')' _
PRIMARY <- WHILE / IF / FUNCTION / IDENTIFIER / ARRAY / NUMBER / BOOLEAN / STRING / INTERPOLATED_STRING / '(' _ EXPRESSION ')' _
FUNCTION <- 'fn' _ PARAMETERS BLOCK
PARAMETERS <- '(' _ (PARAMETER (',' _ PARAMETER)*)? ')' _
PARAMETER <- MUTABLE IDENTIFIER
FUNCTION <- 'fn' _ PARAMETERS BLOCK
PARAMETERS <- '(' _ (PARAMETER (',' _ PARAMETER)*)? ')' _
PARAMETER <- MUTABLE IDENTIFIER
BLOCK <- '{' _ STATEMENTS '}' _
BLOCK <- '{' _ STATEMENTS '}' _
CONDITION_OPERATOR <- < ('==' / '!=' / '<=' / '<' / '>=' / '>') > _
ADDITIVE_OPERATOR <- < [-+] > _
UNARY_PLUS_OPERATOR <- < '+' > _
UNARY_MINUS_OPERATOR <- < '-' > _
UNARY_NOT_OPERATOR <- < '!' > _
CONDITION_OPERATOR <- < ('==' / '!=' / '<=' / '<' / '>=' / '>') > _
ADDITIVE_OPERATOR <- < [-+] > _
UNARY_PLUS_OPERATOR <- < '+' > _
UNARY_MINUS_OPERATOR <- < '-' > _
UNARY_NOT_OPERATOR <- < '!' > _
MULTIPLICATIVE_OPERATOR <- < [*/%] > _
IDENTIFIER <- < [a-zA-Z_][a-zA-Z0-9_]* > _
IDENTIFIER <- < [a-zA-Z_][a-zA-Z0-9_]* > _
ARRAY <- '[' _ (EXPRESSION (',' _ EXPRESSION)*) ']' _
NUMBER <- < [0-9]+ > _
BOOLEAN <- < ('true' / 'false') > _
STRING <- ['] < (!['] .)* > ['] _
ARRAY <- '[' _ (EXPRESSION (',' _ EXPRESSION)*) ']' _
NUMBER <- < [0-9]+ > _
BOOLEAN <- < ('true' / 'false') > _
STRING <- ['] < (!['] .)* > ['] _
INTERPOLATED_STRING <- '"' ('{' _ EXPRESSION '}' / INTERPOLATED_CONTENT)* '"' _
INTERPOLATED_CONTENT <- (!["{] .) (!["{] .)*
INTERPOLATED_STRING <- '"' ('{' _ EXPRESSION '}' / INTERPOLATED_CONTENT)* '"' _
INTERPOLATED_CONTENT <- (!["{] .) (!["{] .)*
MUTABLE <- < 'mut'? > _
MUTABLE <- < 'mut'? > _
~_ <- (Space / EndOfLine / Comment)*
Space <- ' ' / '\t'
EndOfLine <- '\r\n' / '\n' / '\r'
EndOfFile <- !.
Comment <- '/*' (!'*/' .)* '*/' / ('#' / '//') (!(EndOfLine / EndOfFile) .)* (EndOfLine / EndOfFile)
~_ <- (Space / EndOfLine / Comment)*
Space <- ' ' / '\t'
EndOfLine <- '\r\n' / '\n' / '\r'
EndOfFile <- !.
Comment <- '/*' (!'*/' .)* '*/' / ('#' / '//') (!(EndOfLine / EndOfFile) .)* (EndOfLine / EndOfFile)
)";

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