compiler: fix msvc empty struct & enable travis msvc

.travis.yml

@@ -56,18 +56,10 @@ script:
         ./make.bat -gcc
       fi
       if [[ "${TRAVIS_JOB_NAME}" == "windows_msvc" ]]; then
-        exit
         echo "Building V with MSVC"
         export VFLAGS="-os msvc"
         ./make.bat -msvc
       fi
-      ./v.exe -o v2.exe compiler
-      ./v2.exe -o v3.exe compiler
-      ./v3.exe -o v4.exe compiler
-      ls -la v.exe
-      ls -la v2.exe
-      ls -la v3.exe
-      ls -la v4.exe
       
       ### running just repl_test.v produces failing results earlier and is easier to read
       echo "Running only the repl tests directly..."

compiler/cheaders.v

@@ -43,6 +43,8 @@ CommonCHeaders = '
 #define OPTION_CAST(x) (x)
 
 #ifdef _WIN32
+#undef EMPTY_STRUCT_INITIALIZATION
+#define EMPTY_STRUCT_INITIALIZATION 0
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 
@@ -61,11 +63,9 @@ CommonCHeaders = '
 
 // MSVC cannot parse some things properly
 #undef EMPTY_STRUCT_DECLARATION
-#undef EMPTY_STRUCT_INITIALIZATION
 #undef OPTION_CAST
 
 #define EMPTY_STRUCT_DECLARATION int ____dummy_variable
-#define EMPTY_STRUCT_INITIALIZATION 0
 #define OPTION_CAST(x)
 #endif
 

compiler/fn.v

@@ -550,6 +550,7 @@ fn (p mut Parser) async_fn_call(f Fn, method_ph int, receiver_var, receiver_type
 			if i < f.args.len - 1 {
 				str_args += ','
 			}
+			did_gen_something = true
 			continue
 		}
 		// Set the struct values (args)
@@ -565,7 +566,7 @@ fn (p mut Parser) async_fn_call(f Fn, method_ph int, receiver_var, receiver_type
 
 	if !did_gen_something {
 		// Msvc doesnt like empty struct
-		arg_struct += 'EMPTY_STRUCT_DECLARATION'
+		arg_struct += 'EMPTY_STRUCT_DECLARATION;'
 	}
 
 	arg_struct += '} $arg_struct_name ;'

compiler/gen_c.v

@@ -329,9 +329,6 @@ fn (p mut Parser) gen_struct_init(typ string, t Type) bool {
 		}
 		else {
 			p.gen('($typ) {')
-			if t.fields.len == 1 && t.fields[0].name == '' && t.fields[0].typ.starts_with('EMPTY_STRUCT_DECLARATION') {
-				p.gen(' EMPTY_STRUCT_INITIALIZATION ')
-			}
 		}
 	}
 	else {

compiler/parser.v

@@ -2835,8 +2835,8 @@ fn (p mut Parser) struct_init(typ string) string {
 				if i != t.fields.len - 1 {
 					p.gen(',')
 				}
+				did_gen_something = true
 			}
-			did_gen_something = true
 		}
 	}
 	// Point{3,4} syntax
@@ -2870,7 +2870,7 @@ fn (p mut Parser) struct_init(typ string) string {
 		did_gen_something = true
 	}
 	if !did_gen_something {
-		p.gen('0')
+		p.gen('EMPTY_STRUCT_INITIALIZATION')
 	}
 	p.gen('}')
 	if ptr && !p.is_js {