cgen/checker: fixes & fixes & tmp fixes :D

vlib/v/ast/ast.v

@@ -389,6 +389,7 @@ pub:
 // cond       Expr
 	val        string
 	stmts      []Stmt
+	is_not     bool
 	pos        token.Position
 mut:
 	has_else   bool

vlib/v/checker/checker.v

@@ -178,11 +178,11 @@ pub fn (c mut Checker) call_expr(call_expr mut ast.CallExpr) table.Type {
 		return table.string_type
 	}
 	// start hack: until v1 is fixed and c definitions are added for these
-	if fn_name in ['C.calloc', 'C.exit', 'C.free'] {
+	if fn_name in ['C.calloc', 'C.malloc', 'C.exit', 'C.free'] {
 		for arg in call_expr.args {
 			c.expr(arg.expr)
 		}
-		if fn_name == 'C.calloc' {
+		if fn_name in ['C.calloc', 'C.malloc'] {
 			return table.byteptr_type
 		}
 		return table.void_type

vlib/v/gen/cgen.v

@@ -268,8 +268,14 @@ fn (g mut Gen) stmt(node ast.Stmt) {
 			g.const_decl(it)
 		}
 		ast.CompIf {
-			g.writeln('\n#ifdef ' + comp_if_to_ifdef(it.val))
-			g.writeln('// #if $it.val')
+			if it.is_not {
+				g.writeln('\n#ifndef ' + comp_if_to_ifdef(it.val))
+				g.writeln('// #if not $it.val')
+			}
+			else {
+				g.writeln('\n#ifdef ' + comp_if_to_ifdef(it.val))
+				g.writeln('// #if $it.val')
+			}
 			// println('comp if stmts $g.file.path:$it.pos.line_nr')
 			g.stmts(it.stmts)
 			if it.has_else {
@@ -2025,6 +2031,9 @@ fn comp_if_to_ifdef(name string) string {
 		'mingw' {
 			return '__MINGW32__'
 		}
+		'glibc' {
+			return '__GLIBC__'
+		}
 		'no_bounds_checking' {
 			return 'NO_BOUNDS_CHECK'
 		}

vlib/v/parser/comptime.v

@@ -8,7 +8,8 @@ pub fn (p mut Parser) comp_if() ast.CompIf {
 	pos := p.tok.position()
 	p.next()
 	p.check(.key_if)
-	if p.tok.kind == .not {
+	is_not := p.tok.kind == .not
+	if is_not {
 		p.next()
 	}
 	val := p.check_name()
@@ -16,6 +17,7 @@ pub fn (p mut Parser) comp_if() ast.CompIf {
 		p.next()
 	}
 	mut node := ast.CompIf{
+		is_not: is_not
 		stmts: p.parse_block()
 		pos: pos
 		val: val

vlib/v/table/atypes.v

@@ -205,7 +205,7 @@ pub const (
 pub const (
 	builtin_type_names = ['void', 'voidptr', 'charptr', 'byteptr', 'i8', 'i16', 'int', 'i64', 'u16', 'u32', 'u64',
 	'f32', 'f64', 'string', 'char', 'byte', 'bool', 'none', 'array', 'array_fixed', 'map', 'struct',
-	'mapnode', 'ustring']
+	'mapnode', 'ustring', 'size_t']
 )
 
 pub struct MultiReturn {
@@ -411,6 +411,10 @@ pub fn (t mut Table) register_builtin_type_symbols() {
 		kind: .map
 		name: 'map'
 	})
+	t.register_type_symbol(TypeSymbol{
+		kind: .placeholder
+		name: 'size_t'
+	})
 	// TODO: remove. for v1 map compatibility
 	map_string_string_idx := t.find_or_register_map(string_type, string_type)
 	map_string_int_idx := t.find_or_register_map(string_type, int_type)

vlib/v/table/table.v

@@ -470,6 +470,15 @@ pub fn (t &Table) check(got, expected Type) bool {
 	&& (got_idx in pointer_type_idxs || got_idx in number_type_idxs) {
 		return true
 	}
+	// see hack in checker IndexExpr line #691
+	if (got_idx == byte_type_idx && exp_idx == byteptr_type_idx) //
+	|| (exp_idx == byte_type_idx && got_idx == byteptr_type_idx) {
+		return true
+	}
+	if (got_idx == char_type_idx && exp_idx == charptr_type_idx) //
+	|| (exp_idx == char_type_idx && got_idx == charptr_type_idx) {
+		return true
+	}
 	// # NOTE: use symbols from this point on for perf
 	got_type_sym := t.get_type_symbol(got)
 	exp_type_sym := t.get_type_symbol(expected)
@@ -477,11 +486,6 @@ pub fn (t &Table) check(got, expected Type) bool {
 	if (got_type_sym.is_int() && exp_type_sym.kind == .enum_) || (exp_type_sym.is_int() && got_type_sym.kind == .enum_) {
 		return true
 	}
-	// TODO: actually check for & handle pointers with name_expr
-	// see hack in checker IndexExpr line #691
-	if (got_type_sym.kind == .byte && exp_type_sym.kind == .byteptr) || (exp_type_sym.kind == .byte && got_type_sym.kind == .byteptr) {
-		return true
-	}
 	// TODO
 	// if got_type_sym.kind == .array && exp_type_sym.kind == .array {
 	// return true