name types inside functions after variable

Before this commit:

    fn f() []const u8 {
        const S = struct {};
        return @typeName(S);  // "f()", unexpected.
    }

And now:

    fn f() []const u8 {
        const S = struct {};
        return @typeName(S);  // "S", expected.
    }

Fixes #675.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/ir.cpp b/src/ir.cpp
index 7eac9e4d23..b276abff33 100644
--- a/src/ir.cpp
+++ b/src/ir.cpp
@@ -4172,7 +4172,13 @@ static IrInstruction *ir_gen_var_decl(IrBuilder *irb, Scope *scope, AstNode *nod
             buf_sprintf("cannot set section of local variable '%s'", buf_ptr(variable_declaration->symbol)));
     }
 
+    // Temporarily set the name of the IrExecutable to the VariableDeclaration
+    // so that the struct or enum from the init expression inherits the name.
+    Buf *old_exec_name = irb->exec->name;
+    irb->exec->name = variable_declaration->symbol;
     IrInstruction *init_value = ir_gen_node(irb, variable_declaration->expr, scope);
+    irb->exec->name = old_exec_name;
+
     if (init_value == irb->codegen->invalid_instruction)
         return init_value;