1grammar t015calc; 2options { 3 language =Cpp; 4} 5 6@lexer::includes 7{ 8#include "UserTestTraits.hpp" 9} 10@lexer::namespace 11{ Antlr3Test } 12 13@parser::includes { 14#include "UserTestTraits.hpp" 15} 16@parser::namespace 17{ Antlr3Test } 18 19@header { 20import math 21} 22 23@parser::init { 24self.reportedErrors = [] 25} 26 27@parser::members { 28def emitErrorMessage(self, msg): 29 self.reportedErrors.append(msg) 30} 31 32evaluate returns [result]: r=expression {result = r}; 33 34expression returns [result]: r=mult ( 35 '+' r2=mult {r += r2} 36 | '-' r2=mult {r -= r2} 37 )* {result = r}; 38 39mult returns [result]: r=log ( 40 '*' r2=log {r *= r2} 41 | '/' r2=log {r /= r2} 42// | '%' r2=log {r %= r2} 43 )* {result = r}; 44 45log returns [result]: 'ln' r=exp {result = math.log(r)} 46 | r=exp {result = r} 47 ; 48 49exp returns [result]: r=atom ('^' r2=atom {r = math.pow(r,r2)} )? {result = r} 50 ; 51 52atom returns [result]: 53 n=INTEGER {result = int($n.text)} 54 | n=DECIMAL {result = float($n.text)} 55 | '(' r=expression {result = r} ')' 56 | 'PI' {result = math.pi} 57 | 'E' {result = math.e} 58 ; 59 60INTEGER: DIGIT+; 61 62DECIMAL: DIGIT+ '.' DIGIT+; 63 64fragment 65DIGIT: '0'..'9'; 66 67WS: (' ' | '\n' | '\t')+ {$channel = HIDDEN}; 68