patch 8.1.1114: confusing overloaded operator "." for string concatenation
Problem: Confusing overloaded operator "." for string concatenation.
Solution: Add ".." for string concatenation. Also "let a ..= b".
diff --git a/src/eval.c b/src/eval.c
index ec2dc9a..78e2c60 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -1234,6 +1234,7 @@
* ":let var /= expr" assignment command.
* ":let var %= expr" assignment command.
* ":let var .= expr" assignment command.
+ * ":let var ..= expr" assignment command.
* ":let [var1, var2] = expr" unpack list.
*/
void
@@ -1255,8 +1256,8 @@
if (argend > arg && argend[-1] == '.') // for var.='str'
--argend;
expr = skipwhite(argend);
- if (*expr != '=' && !(vim_strchr((char_u *)"+-*/%.", *expr) != NULL
- && expr[1] == '='))
+ if (*expr != '=' && !((vim_strchr((char_u *)"+-*/%.", *expr) != NULL
+ && expr[1] == '=') || STRNCMP(expr, "..=", 3) == 0))
{
/*
* ":let" without "=": list variables
@@ -1286,7 +1287,11 @@
if (*expr != '=')
{
if (vim_strchr((char_u *)"+-*/%.", *expr) != NULL)
+ {
op[0] = *expr; // +=, -=, *=, /=, %= or .=
+ if (expr[0] == '.' && expr[1] == '.') // ..=
+ ++expr;
+ }
expr = skipwhite(expr + 2);
}
else
@@ -3813,6 +3818,7 @@
* + number addition
* - number subtraction
* . string concatenation
+ * .. string concatenation
*
* "arg" must point to the first non-white of the expression.
* "arg" is advanced to the next non-white after the recognized expression.
@@ -3872,6 +3878,8 @@
/*
* Get the second variable.
*/
+ if (op == '.' && *(*arg + 1) == '.') // .. string concatenation
+ ++*arg;
*arg = skipwhite(*arg + 1);
if (eval6(arg, &var2, evaluate, op == '.') == FAIL)
{