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Code cleanup.

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yhirose 2015-05-28 23:34:10 -04:00
parent 456ce928ea
commit 3eded9ea36
1 changed files with 27 additions and 27 deletions
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54
language/parser.cc
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@ -4,43 +4,43 @@ using namespace peglib;
using namespace std;
static auto g_grammar = R"(
PROGRAM <- _ STATEMENTS
PROGRAM <- _ STATEMENTS
STATEMENTS <- EXPRESSION*
STATEMENTS <- EXPRESSION*
EXPRESSION <- ASSIGNMENT / PRIMARY
ASSIGNMENT <- IDENTIFIER '=' _ EXPRESSION
WHILE <- 'while' _ EXPRESSION BLOCK
IF <- 'if' _ EXPRESSION BLOCK ('else' _ 'if' _ EXPRESSION BLOCK)* ('else' _ BLOCK)?
FUNCTION <- 'fn' _ PARAMETERS BLOCK
PARAMETERS <- '(' _ IDENTIFIER* ')' _
FUNCTION_CALL <- IDENTIFIER ARGUMENTS
ARGUMENTS <- '(' _ EXPRESSION* ')' _
EXPRESSION <- ASSIGNMENT / PRIMARY
ASSIGNMENT <- IDENTIFIER '=' _ EXPRESSION
WHILE <- 'while' _ EXPRESSION BLOCK
IF <- 'if' _ EXPRESSION BLOCK ('else' _ 'if' _ EXPRESSION BLOCK)* ('else' _ BLOCK)?
FUNCTION <- 'fn' _ PARAMETERS BLOCK
PARAMETERS <- '(' _ IDENTIFIER* ')' _
FUNCTION_CALL <- IDENTIFIER ARGUMENTS
ARGUMENTS <- '(' _ EXPRESSION* ')' _
PRIMARY <- CONDITION (CONDITION_OPERATOR CONDITION)?
CONDITION <- TERM (TERM_OPERATOR TERM)*
TERM <- FACTOR (FACTOR_OPERATOR FACTOR)*
FACTOR <- WHILE / IF / FUNCTION / FUNCTION_CALL / NUMBER / BOOLEAN / STRING / INTERPOLATED_STRING / IDENTIFIER / '(' _ EXPRESSION ')' _
PRIMARY <- CONDITION (CONDITION_OPERATOR CONDITION)?
CONDITION <- TERM (TERM_OPERATOR TERM)*
TERM <- FACTOR (FACTOR_OPERATOR FACTOR)*
FACTOR <- WHILE / IF / FUNCTION / FUNCTION_CALL / NUMBER / BOOLEAN / STRING / INTERPOLATED_STRING / IDENTIFIER / '(' _ EXPRESSION ')' _
BLOCK <- '{' _ STATEMENTS '}' _
BLOCK <- '{' _ STATEMENTS '}' _
CONDITION_OPERATOR <- < ('==' / '!=' / '<=' / '<' / '>=' / '>') > _
TERM_OPERATOR <- < [-+] > _
FACTOR_OPERATOR <- < [*/%] > _
IDENTIFIER <- < [a-zA-Z_]+ > _
CONDITION_OPERATOR <- < ('==' / '!=' / '<=' / '<' / '>=' / '>') > _
TERM_OPERATOR <- < [-+] > _
FACTOR_OPERATOR <- < [*/%] > _
IDENTIFIER <- < [a-zA-Z_]+ > _
NUMBER <- < [0-9]+ > _
BOOLEAN <- < ('true' / 'false') > _
STRING <- ['] < (!['] .)* > ['] _
NUMBER <- < [0-9]+ > _
BOOLEAN <- < ('true' / 'false') > _
STRING <- ['] < (!['] .)* > ['] _
INTERPOLATED_STRING <- '"' ('{' _ EXPRESSION '}' / INTERPOLATED_CONTENT)* '"' _
INTERPOLATED_CONTENT <- (!["{] .) (!["{] .)*
~_ <- (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)
)";
peglib::peg& get_parser()