changed equals to assign

src/lexer.l

@@ -17,7 +17,7 @@ in              { return yy::parser::token::TOK_KW_IF;}
 \(              { return yy::parser::token::TOK_L_PAREN; }
 \)              { return yy::parser::token::TOK_R_PAREN; }
 \:              { return yy::parser::token::TOK_COLON; }
-\=              { return yy::parser::token::TOK_EQUALS; }
+\=              { return yy::parser::token::TOK_ASSIGN; }
 \+              { return yy::parser::token::TOK_PLUS; }
 \-              { return yy::parser::token::TOK_MINUS; }
 \"              { yymore(); BEGIN(STRING); }

src/parser.y

@@ -27,7 +27,7 @@
 %token <std::string> IDENTIFIER
 %token <std::string> STRING
 %token <int> NUMBER
-%token EQUALS PLUS MINUS L_PAREN R_PAREN COLON
+%token ASSIGN PLUS MINUS L_PAREN R_PAREN COLON
 %token KW_DEF KW_IF KW_RETURN KW_FOR KW_IN
 %token EOF NEWLINE INDENT_UP INDENT_DOWN
 

test/lexer/1.out

@@ -1,9 +1,9 @@
 IDENTIFIER hello
-EQUALS
+ASSIGN
 NUMBER 42
 NEWLINE
 IDENTIFIER name
-EQUALS
+ASSIGN
 STRING "world"
 NEWLINE
 IDENTIFIER x