inline assembly

vlib/compiler/asm.v

@@ -0,0 +1,38 @@
+// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+module compiler
+
+fn (p mut Parser) inline_asm() {
+	if !p.inside_unsafe {
+		p.error('asm() needs to be run unside `unsafe {}`')
+	}	
+	p.next()
+	p.check(.lpar)
+	s := p.check_string()
+	p.genln('asm("$s"')
+	for p.tok == .str {
+		p.genln('"$p.lit"')
+		p.next()
+	}	
+	for p.tok == .colon {
+		p.next()
+		arg := p.check_string()
+		p.gen(': "$arg"')
+		if p.tok == .lpar {
+			p.next()
+			var_name := p.check_name()
+			if !p.known_var(var_name) {
+				p.error('unknown variable `$var_name`')
+			}	
+			p.check(.rpar)
+			p.genln('($var_name)')
+			
+		}	
+		
+	}	
+	p.genln(');')
+	p.check(.rpar)
+	
+}