cgen: operator overloading

vlib/v/util/util.v

@@ -3,8 +3,10 @@
 // that can be found in the LICENSE file.
 module util
 
-import os
-import v.pref
+import (
+	os
+	v.pref
+)
 
 pub const (
 	v_version = '0.1.26'
@@ -22,7 +24,7 @@ pub fn full_hash() string {
 	build_hash := vhash()
 	current_hash := githash(false)
 	if build_hash == current_hash {
-	   return build_hash
+		return build_hash
 	}
 	return '${build_hash}.${current_hash}'
 }
@@ -41,7 +43,7 @@ pub fn full_v_version() string {
 // NB: githash(true) must be called only when v detects that it builds itself.
 // For all other programs, githash(false) should be used.
 pub fn githash(should_get_from_filesystem bool) string {
-	for {
+	for  {
 		// The `for` construct here is used as a goto substitute.
 		// The code in this function will break out of the `for`
 		// if it detects an error and can not continue.
@@ -50,7 +52,7 @@ pub fn githash(should_get_from_filesystem bool) string {
 			vroot := os.dir(vexe)
 			// .git/HEAD
 			git_head_file := os.join_path(vroot, '.git', 'HEAD')
-			if !os.exists( git_head_file ) {
+			if !os.exists(git_head_file) {
 				break
 			}
 			// 'ref: refs/heads/master' ... the current branch name
@@ -60,11 +62,11 @@ pub fn githash(should_get_from_filesystem bool) string {
 			gcbranch_rel_path := head_content.replace('ref: ', '').trim_space()
 			gcbranch_file := os.join_path(vroot, '.git', gcbranch_rel_path)
 			// .git/refs/heads/master
-			if !os.exists( gcbranch_file ) {
+			if !os.exists(gcbranch_file) {
 				break
 			}
 			// get the full commit hash contained in the ref heads file
-			current_branch_hash := os.read_file( gcbranch_file ) or {
+			current_branch_hash := os.read_file(gcbranch_file) or {
 				break
 			}
 			desired_hash_length := 7
@@ -81,20 +83,18 @@ pub fn githash(should_get_from_filesystem bool) string {
 }
 
 //
-
 fn set_vroot_folder(vroot_path string) {
 	// Preparation for the compiler module:
 	// VEXE env variable is needed so that compiler.vexe_path()
 	// can return it later to whoever needs it:
 	vname := if os.user_os() == 'windows' { 'v.exe' } else { 'v' }
-	os.setenv('VEXE', os.real_path(os.join_path( vroot_path, vname)), true)
+	os.setenv('VEXE', os.real_path(os.join_path(vroot_path, vname)), true)
 }
 
 pub fn launch_tool(is_verbose bool, tool_name string) {
 	vexe := pref.vexe_path()
 	vroot := os.dir(vexe)
 	set_vroot_folder(vroot)
-
 	tool_args := os.args[1..].join(' ')
 	tool_exe := path_of_executable(os.real_path('$vroot/cmd/tools/$tool_name'))
 	tool_source := os.real_path('$vroot/cmd/tools/${tool_name}.v')
@@ -105,7 +105,6 @@ pub fn launch_tool(is_verbose bool, tool_name string) {
 		println('launch_tool tool_args   : $tool_args')
 		println('launch_tool tool_command: $tool_command')
 	}
-
 	// TODO Caching should be done on the `vlib/v` level.
 	mut should_compile := false
 	if !os.exists(tool_exe) {
@@ -115,7 +114,6 @@ pub fn launch_tool(is_verbose bool, tool_name string) {
 			// v was recompiled, maybe after v up ...
 			// rebuild the tool too just in case
 			should_compile = true
-
 			if tool_name == 'vself' || tool_name == 'vup' {
 				// The purpose of vself/up is to update and recompile v itself.
 				// After the first 'v self' execution, v will be modified, so
@@ -133,14 +131,15 @@ pub fn launch_tool(is_verbose bool, tool_name string) {
 	if is_verbose {
 		println('launch_tool should_compile: $should_compile')
 	}
-
 	if should_compile {
 		mut compilation_command := '"$vexe" '
 		compilation_command += '"$tool_source"'
 		if is_verbose {
 			println('Compiling $tool_name with: "$compilation_command"')
 		}
-		tool_compilation := os.exec(compilation_command) or { panic(err) }
+		tool_compilation := os.exec(compilation_command) or {
+			panic(err)
+		}
 		if tool_compilation.exit_code != 0 {
 			mut err := 'Permission denied'
 			if !tool_compilation.output.contains('Permission denied') {
@@ -153,7 +152,6 @@ pub fn launch_tool(is_verbose bool, tool_name string) {
 	if is_verbose {
 		println('launch_tool running tool command: $tool_command ...')
 	}
-
 	exit(os.system(tool_command))
 }
 
@@ -180,13 +178,42 @@ pub fn read_file(file_path string) ?string {
 	return raw_text
 }
 
-
 [inline]
 fn imin(a, b int) int {
-    return if a < b { a } else { b }
+	return if a < b {
+		a
+	} else {
+		b
+	}
 }
 
 [inline]
 fn imax(a, b int) int {
-    return if a > b { a } else { b }
+	return if a > b {
+		a
+	} else {
+		b
+	}
+}
+
+fn replace_op(s string) string {
+	last_char := s[s.len - 1]
+	suffix := match last_char {
+		`+` {
+			'_plus'
+		}
+		`-` {
+			'_minus'
+		}
+		`*` {
+			'_mult'
+		}
+		`/` {
+			'_div'
+		}
+		else {
+			''
+		}
+	}
+	return s[..s.len - 1] + suffix
 }