generics, vweb, comptime codegen, etc

vlib/vweb/tmpl/tmpl.v

@@ -0,0 +1,69 @@
+module tmpl 
+
+import os 
+import strings 
+
+const (
+	STR_START = 'sb.write(\''
+	STR_END   = '\' ) '
+)
+
+ 
+pub fn compile_template(path string) string {
+	//lines := os.read_lines(path)
+	mut html := os.read_file(path) or {
+		panic('html failed')
+		return ''
+	} 
+	mut	header := ''
+	if os.file_exists('header.html') { 
+		h := os.read_file('header.html') or {
+			panic('html failed')
+			return ''
+		} 
+		header = h 
+	} 
+	lines := html.split_into_lines() 
+	mut s := strings.new_builder(1000) 
+	base := path.all_after('/').replace('.html', '')
+	s.writeln('module main import strings fn ${base}_view() string {   // this line will get removed becase only function body is embedded 
+mut sb := strings.new_builder(${lines.len * 30})
+header := \'$header\' 
+_ := header 
+//footer := \'footer\' 
+') 
+	s.writeln(STR_START)
+	for line in lines {
+		if line.contains('@if ') {
+			s.writeln(STR_END)
+			pos := line.index('@if')
+			s.writeln('if ' + line.right(pos + 4) + '{')
+			s.writeln(STR_START)
+		}
+		else if line.contains('@end') {
+			s.writeln(STR_END)
+			s.writeln('}')
+			s.writeln(STR_START)
+		}
+		else if line.contains('@else') {
+			s.writeln(STR_END)
+			s.writeln(' } else { ')
+			s.writeln(STR_START)
+		}
+		else if line.contains('@for') {
+			s.writeln(STR_END)
+			pos := line.index('@for')
+			s.writeln('for ' + line.right(pos + 4) + '{')
+			s.writeln(STR_START)
+		}
+		// @name
+		else { 
+			s.writeln(line.replace('@', '\x24').replace('\'', '"') ) 
+		}
+	}
+	s.writeln(STR_END)
+	s.writeln('tmpl_res := sb.str() ') 
+	s.writeln('return tmpl_res }')
+	return s.str()
+}
+