Mercurial > vim

diff src/vim9compile.c @ 19854:eddc81783052 v8.2.0483

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
patch 8.2.0483: Vim9: "let x = x + 1" does not give an error Commit: https://github.com/vim/vim/commit/d25ec2cfa0c25c3b00b7f8963b8aea799df1f20a Author: Bram Moolenaar <Bram@vim.org> Date: Mon Mar 30 21:05:45 2020 +0200 patch 8.2.0483: Vim9: "let x = x + 1" does not give an error Problem: Vim9: "let x = x + 1" does not give an error. Solution: Hide the variable when compiling the expression.
author Bram Moolenaar <Bram@vim.org>
date Mon, 30 Mar 2020 21:15:03 +0200
parents 36d629aa3d6e
children cf09c0962608
line wrap: on
line diff
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -3685,6 +3685,8 @@ compile_assignment(char_u *arg, exarg_T 
     }
     else if (oplen > 0)
     {
+	int r;
+
 	// for "+=", "*=", "..=" etc. first load the current value
 	if (*op != '=')
 	{
@@ -3717,10 +3719,16 @@ compile_assignment(char_u *arg, exarg_T 
 	    }
 	}
 
-	// compile the expression
+	// Compile the expression.  Temporarily hide the new local variable
+	// here, it is not available to this expression.
+	if (idx >= 0)
+	    --cctx->ctx_locals.ga_len;
 	instr_count = instr->ga_len;
 	p = skipwhite(p + oplen);
-	if (compile_expr1(&p, cctx) == FAIL)
+	r = compile_expr1(&p, cctx);
+	if (idx >= 0)
+	    ++cctx->ctx_locals.ga_len;
+	if (r == FAIL)
 	    goto theend;
 
 	if (idx >= 0 && (is_decl || !has_type))