remove unnecessary overloads of setString()

compiler/src/dmd/frontend.h

@@ -8920,9 +8920,6 @@ struct Token final
         };
         Identifier* ident;
     };
-    void setString(const char* ptr, size_t length);
-    void setString(const OutBuffer& buf);
-    void setString();
     const char* toChars() const;
     static const char* toChars(TOK value);
     Token() :

compiler/src/dmd/lexer.d

@@ -1635,7 +1635,7 @@ class Lexer
             case 0:
             case 0x1A:
                 error("unterminated string constant starting at %s", start.toChars());
-                result.setString();
+                result.setString(null);
                 // rewind `p` so it points to the EOF character
                 p--;
                 return;
@@ -1645,7 +1645,7 @@ class Lexer
                     if (supportInterpolation)
                         result.appendInterpolatedPart(stringbuffer);
                     else
-                        result.setString(stringbuffer);
+                        result.setString(stringbuffer[]);
 
                     stringPostfix(result);
                     return;
@@ -1698,7 +1698,7 @@ class Lexer
             case 0:
             case 0x1A:
                 error("unterminated string constant starting at %s", start.toChars());
-                t.setString();
+                t.setString(null);
                 // decrement `p`, because it needs to point to the next token (the 0 or 0x1A character is the TOK.endOfFile token).
                 p--;
                 return TOK.hexadecimalString;
@@ -1708,7 +1708,7 @@ class Lexer
                     error("odd number (%d) of hex characters in hex string", n);
                     stringbuffer.writeByte(cast(char)v);
                 }
-                t.setString(stringbuffer);
+                t.setString(stringbuffer[]);
                 stringPostfix(t);
                 return TOK.hexadecimalString;
             default:
@@ -1801,7 +1801,7 @@ class Lexer
             case 0:
             case 0x1A:
                 error("unterminated delimited string constant starting at %s", start.toChars());
-                result.setString();
+                result.setString(null);
                 // decrement `p`, because it needs to point to the next token (the 0 or 0x1A character is the TOK.endOfFile token).
                 p--;
                 return;
@@ -1907,7 +1907,7 @@ class Lexer
             error("delimited string must end in `\"`");
         else
             error(token.loc, "delimited string must end in `%c\"`", delimright);
-        result.setString(stringbuffersecondary);
+        result.setString(stringbuffersecondary[]);
         stringPostfix(result);
     }
 
@@ -1954,7 +1954,7 @@ class Lexer
                     if (supportInterpolation)
                         result.appendInterpolatedPart(pstart, p - 1 - pstart);
                     else
-                        result.setString(pstart, p - 1 - pstart);
+                        result.setString(pstart[0 .. p - 1 - pstart]);
 
                     stringPostfix(result);
                     return;
@@ -1976,7 +1976,7 @@ class Lexer
                 continue;
             case TOK.endOfFile:
                 error("unterminated token string constant starting at %s", start.toChars());
-                result.setString();
+                result.setString(null);
                 return;
             default:
                 continue;
@@ -2121,7 +2121,7 @@ class Lexer
                 if (supportInterpolation)
                     t.appendInterpolatedPart(stringbuffer);
                 else
-                    t.setString(stringbuffer);
+                    t.setString(stringbuffer[]);
                 if (!Ccompile)
                     stringPostfix(t);
                 return;
@@ -2131,7 +2131,7 @@ class Lexer
                 p--;
             Lunterminated:
                 error("unterminated string constant starting at %s", start.toChars());
-                t.setString();
+                t.setString(null);
                 return;
             default:
                 if (c & 0x80)

compiler/src/dmd/tokens.d

@@ -949,40 +949,23 @@ nothrow:
     }
 
     /****
-     * Set to contents of ptr[0..length]
+     * Set to contents of str
      * Params:
-     *  ptr = pointer to string
-     *  length = length of string
+     *  str = string
      */
-    void setString(const(char)* ptr, size_t length)
+    extern (D) void setString(const(char)[] str)
     {
         value = TOK.string_;
-        auto s = cast(char*)mem.xmalloc_noscan(length + 1);
-        memcpy(s, ptr, length);
-        s[length] = 0;
-        ustring = s;
-        len = cast(uint)length;
-        postfix = 0;
-    }
-
-    /****
-     * Set to contents of buf
-     * Params:
-     *  buf = string (not zero terminated)
-     */
-    void setString(const ref OutBuffer buf)
-    {
-        setString(cast(const(char)*)buf[].ptr, buf.length);
-    }
-
-    /****
-     * Set to empty string
-     */
-    void setString()
-    {
-        value = TOK.string_;
-        ustring = "";
-        len = 0;
+        len = cast(uint)str.length;
+        if (len)
+        {
+            auto s = cast(char*)mem.xmalloc_noscan(len + 1);
+            memcpy(s, str.ptr, len);
+            s[len] = 0;
+            ustring = s;
+        }
+        else
+            ustring = "";
         postfix = 0;
     }