Bug 3013 – Duplicate error message on calling a function with a type

import std.string; void main() { char[] s= string.format("abc","abc"); } testd.d(5): Error: cannot implicitly convert expression (format((& D20TypeInfo_B9AyaAyaAya6__initZ),(immutable(char)[]), "abc","abc")) of type immutable(char)[] to char[]

string.format("abc","abc"); is same as format(string, "abc", "abc"); which means: format(immutable(char)[], "abc", "abc");

The point is the error message should not expose mangled name to users. The original title is pretty clear.

err , it was unclear.. there was a typo.

(In reply to comment #1) > string.format("abc","abc"); > is same as > format(string, "abc", "abc"); > which means: > format(immutable(char)[], "abc", "abc"); I'm confused. Since when has it been legal to pass a type as a function argument?

(In reply to comment #4) > (In reply to comment #1) > > string.format("abc","abc"); > > is same as > > format(string, "abc", "abc"); > > which means: > > format(immutable(char)[], "abc", "abc"); > > I'm confused. Since when has it been legal to pass a type as a function > argument? It's not legal. I was just explaining the error message of this bug: > import std.string; > > void main() > { > char[] s= string.format("abc","abc"); > } > > testd.d(5): Error: cannot implicitly convert expression (format((& > D20TypeInfo_B9AyaAyaAya6__initZ),(immutable(char)[]), > "abc","abc")) of type immutable(char)[] to char[]

So the bug is that it tries to make out the type of the expression and gets somewhere (and hence delivers an error) before realising that string.format is itself invalid. The bug also occurs in DMD 1.043, as this shows: ---------- import std.string; void main() { int s = string.format("abc", "def"); } ---------- array_static_method.d(4): Error: cannot implicitly convert expression (format((& D17TypeInfo_B6AaAaAa6__initZ),(char[]),"abc","def")) of type char[] to int ---------- Strangely, given (int[]) instead of string, 2.030 gives an almost identical cryptic message, but 1.043 emits the more sensible ---------- array_static_method.d(4): Error: no property 'format' for type 'int[]' array_static_method.d(4): Error: function expected before (), not 1 of type int ---------- (OK, so the second message is bogus, but that's just a case of a long-known issue.)

Currently prints: DMD v2.065 DEBUG testx.d(4): Error: string is not an expression testx.d(4): Error: string is not an expression testx.d(4): Error: cannot pass type string as function argument Which is pretty accurate except for the duplicate errors. https://github.com/D-Programming-Language/dmd/pull/2786

Commits pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/7e59edf65460423ea93d1c1ee04928f26e1b82b8 Fix Issue 3013 - Duplicate error message on calling a function with a type https://github.com/D-Programming-Language/dmd/commit/4f4901d782e8d3dc6ccce151e013d953b3b21963 Merge pull request #2786 from yebblies/issue3013 Issue 3013 - Duplicate error message on calling a function with a type