76 lines
2.7 KiB
ANTLR
76 lines
2.7 KiB
ANTLR
parser grammar MXParser;
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options { tokenVocab=MXLexer; }
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mxprog
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: (class_def|define_statement|function_def)+ EOF
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;
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function_def
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: type (LBRACKET RBRACKET)* ID LPAREN ((type (LBRACKET RBRACKET)* ID)(COMMA type (LBRACKET RBRACKET)* ID)*)? RPAREN suite
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;
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class_def : CLASS ID LBRACE (class_var_def|class_constructor|function_def)* RBRACE SEMICOLON;
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class_var_def : type (LBRACKET RBRACKET)* ID (COMMA ID )* SEMICOLON;
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class_constructor : ID LPAREN RPAREN suite;
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suite : LBRACE statement* RBRACE;
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statement
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: SEMICOLON #empty_statement
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| define_statement #definition_statement
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| expr SEMICOLON #expr_statement
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| IF LPAREN expr RPAREN statement (ELSE statement)? #if_statement
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| WHILE LPAREN expr RPAREN statement #while_statement
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| FOR LPAREN (define_statement|(expr SEMICOLON)|SEMICOLON) expr? SEMICOLON expr? RPAREN statement #for_statement
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| (BREAK|CONTINUE|(RETURN expr?)) SEMICOLON #jmp_statement
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| suite #suite_statement
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;
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define_statement : type (LBRACKET RBRACKET)* ID (ASSIGN expr)? (COMMA ID (ASSIGN expr)?)* SEMICOLON;
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expr
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: basic_expr #basic_expression
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| NEW type (LBRACKET expr? RBRACKET)+constant? #new_array_expression
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| NEW type LPAREN RPAREN #new_construct_expression
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| NEW type #new_expression
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| expr DOT (ID|(ID LPAREN (expr (COMMA expr)*)? RPAREN)) #access_expression
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| expr (LBRACKET expr RBRACKET)+ #index_expression
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| expr (SELF_PLUS | SELF_MINUS) #suffix_expression
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| (SELF_PLUS | SELF_MINUS) expr #prefix_expression
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| MINUS expr #opposite_expression
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| LNOT expr #lnot_expression
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| BNOT expr #bnot_expression
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| expr (MULTIPLY|DIVIDE|MOD) expr #mdm_expression
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| expr (PLUS|MINUS) expr #pm_expression
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| expr (ARS|ALS) expr #rl_expression
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| expr (GN|GE|LN|LE) expr #ggll_expression
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| expr (NE|EQ) expr #ne_expression
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| expr BAND expr #band_expression
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| expr BXOR expr #bxor_expression
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| expr BOR expr #bor_expression
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| expr LAND expr #land_expression
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| expr LOR expr #lor_expression
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| <assoc=right> expr QUESTION_MARK expr COLON expr #ternary_expression
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| <assoc=right> expr ASSIGN expr #assign_expression
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;
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basic_expr
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: THIS #this_expr
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| LPAREN expr RPAREN #paren_expr
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| ID #id_expr
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| ID LPAREN (expr (COMMA expr)*)? RPAREN #function_call_expr
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| formatted_string #formatted_string_expr
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| constant #constant_expr
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;
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formatted_string : FORMAT_STRING_WHOLE | (FORMAT_STRING_HEAD expr (FORMAT_STRING_BODY expr)*? FORMAT_STRING_TAIL);
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constant : TRUE
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|FALSE
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|INT_LITERAL
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|STRING_LITERAL
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|NULL
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|LBRACE (constant (COMMA constant)*)? RBRACE;
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type
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: INT
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| BOOL
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| STRING
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| VOID
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| ID
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; |