add comments, fix struct/function lookup

[toc] / Toc.g4

diff --git a/Toc.g4 b/Toc.g4
index 631e2c3d2123e69fa2c124969b43d1c8e48ee9a4..a5d5dd83f7d4d94f7cf98438e5cae71fd05f3b43 100644 (file)
--- a/Toc.g4
+++ b/Toc.g4
@@ -2,88 +2,81 @@ grammar Toc;
 \r
 prog: (decl)+ EOF;\r
 \r
-decl: varDecl\r
+decl: varDecl ';'\r
     | funcDecl\r
     | structDecl\r
+    | namespaceDecl\r
     ;\r
 \r
+namespaceDecl: 'namespace' typeName '{' decl* '}';\r
+\r
 varDecl:  'var' var;\r
 var:  varName (':' type) ('=' expr)?;\r
 varInit:  varName (':' type) ('=' expr);\r
 \r
-type: typeName (typeModifier)*;\r
-typeModifier: '*' | '[' NUMBER? ']';\r
+type: namespaceSpecifier* typeName genericInstantiation? (typeModifier)*;\r
+typeModifier: '*' | ('[' (INT_LIT)? ']');\r
 \r
+namespaceSpecifier: typeName '::';\r
 \r
 funcDecl: 'func' func;\r
-func: funcName '(' parameter ')' (':' type) body;\r
+func: funcName genericDecl? '(' parameter ')' (':' type) (body | ';');\r
 parameter: (var (',' var)*)?;\r
 \r
 body: '{' stmt* '}';\r
 \r
 \r
-structDecl: 'struct' structName '{' structMember* '}';\r
-structMember: structVar | structMethod;\r
-structVar: var;\r
+structDecl: 'struct' structName genericDecl? '{' structMember* '}';\r
+structMember: privateDecl? structVar | structMethod;\r
+structVar: var ';';\r
 structMethod: func;\r
+privateDecl: 'private';\r
 \r
+genericDecl: '<' typeName (',' typeName)* '>';\r
+genericInstantiation: '<' type (',' type)* '>';\r
 \r
-stmt: varDecl\r
+stmt: varDecl ';'\r
     | ifStmt\r
     | switchStmt\r
     | forStmt\r
     | whileStmt\r
-    | assignStmt\r
-    | returnStmt\r
-    | expr;\r
+    | assignStmt ';'\r
+    | returnStmt ';'\r
+    | expr ';';\r
 \r
-ifStmt: 'if' expr body ('else' 'if' expr body)* ('else' body)?;\r
+ifStmt: 'if' expr body elseIfStmt* elseStmt?;\r
+elseIfStmt: 'else' 'if' expr body;\r
+elseStmt: 'else' body;\r
 \r
-switchStmt: 'switch' identifierExpr switchBody;\r
-switchBody: '{' ('case' expr body)* '}';\r
+switchStmt: 'switch' expr switchBody;\r
+switchBody: '{' switchCase* '}';\r
+switchCase: 'case' expr body;\r
 \r
-forStmt: 'for' (varInit | assignStmt) ',' expr ',' expr body;\r
+forStmt: 'for' varInit ',' expr ',' expr body;\r
 \r
 whileStmt: 'while' expr body;\r
 \r
-assignStmt: identifierExpr '=' expr;\r
+assignStmt: expr '=' expr;\r
 \r
 returnStmt: 'return' expr;\r
 \r
-expr: funcExpr\r
-    | litExpr\r
-    | identifierExpr\r
-    | parenExpr\r
-    | accessExpr\r
-    | opExpr;\r
-\r
-/* op */\r
-nonOpExpr: funcExpr\r
-         | litExpr\r
-         | identifierExpr\r
-         | parenExpr\r
-         | accessExpr;\r
-\r
-/* lit access op */\r
-nonAccessExpr: funcExpr\r
-             | identifierExpr\r
-             | parenExpr;\r
-\r
-funcExpr: funcName '(' (expr (',' expr)*)? ')';\r
-\r
-opExpr: binaryOp | prefixOp | postfixOp | ternaryOp;\r
-binaryOp: nonOpExpr BINARY_OP nonOpExpr (BINARY_OP nonOpExpr)*;\r
-prefixOp: PREFIX_OP nonOpExpr;\r
-postfixOp: nonOpExpr POSTFIX_OP;\r
-ternaryOp: nonOpExpr '?' expr ':' expr;\r
-\r
-identifierExpr: varName;\r
-\r
-litExpr: INT_LIT | DECIMAL_LIT | STRING_LIT | BOOL_LIT;\r
+expr: namespaceSpecifier* funcName genericInstantiation? '(' (expr (',' expr)*)? ')' #funcExpr\r
+    | expr '.' funcName genericInstantiation? '(' (expr (',' expr)*)? ')'            #methodExpr\r
+    | literal                          #litExpr\r
+    | '(' expr ')'                     #parenExpr\r
+    | expr (dot | arrow) varName       #dotExpr\r
+    | prefix_op expr                   #prefixOpExpr\r
+    | expr postfix_op                  #postfixOpExpr\r
+    | expr binary_op expr              #binaryOpExpr\r
+    | expr '?' expr ':' expr           #ternaryOpExpr\r
+    | expr '[' expr ']'                #bracketExpr\r
+    | namespaceSpecifier* varName      #identifierExpr\r
+    ;\r
 \r
-accessExpr: nonAccessExpr ((('.' | '->') identifierExpr) | ('[' expr ']'))+;\r
+dot: '.';\r
+arrow: '->';\r
 \r
-parenExpr: '(' expr ')';\r
+literal: INT_LIT | DECIMAL_LIT | StringLit | BOOL_LIT;\r
 \r
 funcName: NAME;\r
 varName: NAME;\r
@@ -91,22 +84,29 @@ typeName: NAME;
 structName: NAME;\r
 \r
 \r
-POSTFIX_OP:\r
+postfix_op:\r
     '++' | '--';\r
-PREFIX_OP:\r
-    [+!~&*-] | POSTFIX_OP;\r
-BINARY_OP:\r
-    [+*/%&<|^>-] |\r
+prefix_op:\r
+    '+' | '-' | '!' | '~' | '&' | '*' | postfix_op;\r
+binary_op:\r
+    '+' | '-' | '*' | '/' | '%' | '&' | '<' | '|' | '^' | '>' |\r
     '==' | '!=' | '<=' | '>=' | '<'  | '>' |\r
     '<<' | '>>' | '||' | '&&' | '&=' | '|=' | '^=' |\r
     '<<=' | '>>=' | '+=' | '-=' | '*=' | '/=' | '%=';\r
 \r
 INT_LIT: ('+' | '-')? [0-9]+;\r
 DECIMAL_LIT: ('+' | '-')* [0-9]+ '.' [0-9]+;\r
-STRING_LIT: '"' [^"]* '"';\r
 BOOL_LIT: 'true' | 'false';\r
+StringLit: '"' CharSeq '"';\r
+\r
+fragment CharSeq: Char+;\r
+fragment Char: ~["\\\r\n]\r
+             | '\\' ['"?abfnrtv\\]\r
+             | '\\\n'\r
+             | '\\\r\n'\r
+             ;\r
 \r
 NAME: ([a-z] | [A-Z] | [0-9])+;\r
 WS: [ \t\r\n]+ -> skip;\r
 NEWLINE: [\r\n]+;\r
-NUMBER: [0-9]+;\r
+COMMENT: '//' .*? '\n' -> skip;\r