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Refactoring.

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yhirose 2015-07-24 22:23:40 -04:00
parent 620c775eee
commit 49665ce113
2 changed files with 90 additions and 89 deletions
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178
language/interpreter.hpp
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@ -3,6 +3,94 @@
#include <string>
#include <peglib.h>
namespace culebra {
const auto grammar_ = R"(
PROGRAM <- _ STATEMENTS
STATEMENTS <- (EXPRESSION (';' _)?)*
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)*
CALL <- PRIMARY (ARGUMENTS / INDEX / DOT)*
ARGUMENTS <- '(' _ (EXPRESSION (',' _ EXPRESSION)*)? ')' _
INDEX <- '[' _ EXPRESSION ']' _
DOT <- '.' _ IDENTIFIER
PRIMARY <- WHILE / IF / FUNCTION / IDENTIFIER / OBJECT / ARRAY / NUMBER / BOOLEAN / STRING / INTERPOLATED_STRING / '(' _ EXPRESSION ')' _
FUNCTION <- 'fn' _ PARAMETERS BLOCK
PARAMETERS <- '(' _ (PARAMETER (',' _ PARAMETER)*)? ')' _
PARAMETER <- MUTABLE IDENTIFIER
BLOCK <- '{' _ STATEMENTS '}' _
CONDITION_OPERATOR <- < ('==' / '!=' / '<=' / '<' / '>=' / '>') > _
ADDITIVE_OPERATOR <- < [-+] > _
UNARY_PLUS_OPERATOR <- < '+' > _
UNARY_MINUS_OPERATOR <- < '-' > _
UNARY_NOT_OPERATOR <- < '!' > _
MULTIPLICATIVE_OPERATOR <- < [*/%] > _
IDENTIFIER <- < [a-zA-Z_][a-zA-Z0-9_]* > _
OBJECT <- '{' _ (OBJECT_PROPERTY (',' _ OBJECT_PROPERTY)*)? '}' _
OBJECT_PROPERTY <- IDENTIFIER ':' _ EXPRESSION
ARRAY <- '[' _ (EXPRESSION (',' _ EXPRESSION)*)? ']' _
NUMBER <- < [0-9]+ > _
BOOLEAN <- < ('true' / 'false') > _
STRING <- ['] < (!['] .)* > ['] _
INTERPOLATED_STRING <- '"' ('{' _ EXPRESSION '}' / INTERPOLATED_CONTENT)* '"' _
INTERPOLATED_CONTENT <- (!["{] .) (!["{] .)*
MUTABLE <- < 'mut'? > _
~_ <- (Space / EndOfLine / Comment)*
Space <- ' ' / '\t'
EndOfLine <- '\r\n' / '\n' / '\r'
EndOfFile <- !.
Comment <- '/*' (!'*/' .)* '*/' / ('#' / '//') (!(EndOfLine / EndOfFile) .)* (EndOfLine / EndOfFile)
)";
inline peglib::peg& get_parser()
{
static peglib::peg parser;
static bool initialized = false;
if (!initialized) {
initialized = true;
parser.log = [&](size_t ln, size_t col, const std::string& msg) {
std::cerr << ln << ":" << col << ": " << msg << std::endl;
};
if (!parser.load_grammar(grammar_)) {
throw std::logic_error("invalid peg grammar");
}
parser.enable_ast(true, { "PARAMETERS", "ARGUMENTS" });
}
return parser;
}
struct Value;
struct Environment;
@ -766,95 +854,6 @@ private:
};
};
inline peglib::peg& get_parser()
{
using namespace peglib;
using namespace std;
static auto grammar_ = R"(
PROGRAM <- _ STATEMENTS
STATEMENTS <- (EXPRESSION (';' _)?)*
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)*
CALL <- PRIMARY (ARGUMENTS / INDEX / DOT)*
ARGUMENTS <- '(' _ (EXPRESSION (',' _ EXPRESSION)*)? ')' _
INDEX <- '[' _ EXPRESSION ']' _
DOT <- '.' _ IDENTIFIER
PRIMARY <- WHILE / IF / FUNCTION / IDENTIFIER / OBJECT / ARRAY / NUMBER / BOOLEAN / STRING / INTERPOLATED_STRING / '(' _ EXPRESSION ')' _
FUNCTION <- 'fn' _ PARAMETERS BLOCK
PARAMETERS <- '(' _ (PARAMETER (',' _ PARAMETER)*)? ')' _
PARAMETER <- MUTABLE IDENTIFIER
BLOCK <- '{' _ STATEMENTS '}' _
CONDITION_OPERATOR <- < ('==' / '!=' / '<=' / '<' / '>=' / '>') > _
ADDITIVE_OPERATOR <- < [-+] > _
UNARY_PLUS_OPERATOR <- < '+' > _
UNARY_MINUS_OPERATOR <- < '-' > _
UNARY_NOT_OPERATOR <- < '!' > _
MULTIPLICATIVE_OPERATOR <- < [*/%] > _
IDENTIFIER <- < [a-zA-Z_][a-zA-Z0-9_]* > _
OBJECT <- '{' _ (OBJECT_PROPERTY (',' _ OBJECT_PROPERTY)*)? '}' _
OBJECT_PROPERTY <- IDENTIFIER ':' _ EXPRESSION
ARRAY <- '[' _ (EXPRESSION (',' _ EXPRESSION)*)? ']' _
NUMBER <- < [0-9]+ > _
BOOLEAN <- < ('true' / 'false') > _
STRING <- ['] < (!['] .)* > ['] _
INTERPOLATED_STRING <- '"' ('{' _ EXPRESSION '}' / INTERPOLATED_CONTENT)* '"' _
INTERPOLATED_CONTENT <- (!["{] .) (!["{] .)*
MUTABLE <- < 'mut'? > _
~_ <- (Space / EndOfLine / Comment)*
Space <- ' ' / '\t'
EndOfLine <- '\r\n' / '\n' / '\r'
EndOfFile <- !.
Comment <- '/*' (!'*/' .)* '*/' / ('#' / '//') (!(EndOfLine / EndOfFile) .)* (EndOfLine / EndOfFile)
)";
static peg parser;
static bool initialized = false;
if (!initialized) {
initialized = true;
parser.log = [&](size_t ln, size_t col, const string& msg) {
cerr << ln << ":" << col << ": " << msg << endl;
};
if (!parser.load_grammar(grammar_)) {
throw logic_error("invalid peg grammar");
}
parser.enable_ast(true, { "PARAMETERS", "ARGUMENTS" });
}
return parser;
}
inline bool run(
const std::string& path,
std::shared_ptr<Environment> env,
@ -890,3 +889,4 @@ inline bool run(
return false;
}
} // namespace culebra

1
language/main.cc
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@ -4,6 +4,7 @@
#include <iostream>
#include <vector>
using namespace culebra;
using namespace std;
bool read_file(const char* path, vector<char>& buff)