init

resources/Python3Parser.g4

@@ -0,0 +1,44 @@
+parser grammar Python3Parser;
+
+options {
+  tokenVocab = Python3Lexer;
+}
+
+file_input: (NEWLINE | stmt)* EOF;
+funcdef: 'def' NAME parameters ':' suite;
+parameters: '(' typedargslist? ')';
+typedargslist: (tfpdef ('=' test)? (',' tfpdef ('=' test)?)*);
+tfpdef: NAME ;
+
+stmt: simple_stmt | compound_stmt;
+simple_stmt: small_stmt  NEWLINE;
+small_stmt: expr_stmt | flow_stmt;
+expr_stmt: testlist ( (augassign testlist) |
+                     ('=' testlist)*);//连等 加等/减等/...
+augassign: ('+=' | '-=' | '*=' | '/=' | '//=' | '%=' );
+flow_stmt: break_stmt | continue_stmt | return_stmt;
+break_stmt: 'break';
+continue_stmt: 'continue';
+return_stmt: 'return' (testlist)?;
+compound_stmt: if_stmt | while_stmt | funcdef ;
+if_stmt: 'if' test ':' suite ('elif' test ':' suite)* ('else' ':' suite)?;
+while_stmt: 'while' test ':' suite;
+suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT;
+test: or_test ;
+or_test: and_test ('or' and_test)*;
+and_test: not_test ('and' not_test)*;
+not_test: 'not' not_test | comparison;
+comparison: arith_expr (comp_op arith_expr)*;
+comp_op: '<'|'>'|'=='|'>='|'<=' | '!=';
+arith_expr: term (addorsub_op term)*;
+addorsub_op: '+'|'-';
+term: factor (muldivmod_op factor)*;
+muldivmod_op: '*'|'/'|'//'|'%';
+factor: ('+'|'-') factor | atom_expr;
+atom_expr: atom trailer?;
+trailer: '(' (arglist)? ')' ;
+atom: (NAME | NUMBER | STRING+| 'None' | 'True' | 'False' | ('(' test ')'));
+testlist: test (',' test)* (',')?;//算式  eg： a,b   a   a+b
+arglist: argument (',' argument)*  (',')?;
+argument: ( test |
+            test '=' test );