ast: SqlExpr

vlib/orm/orm_test.v

@@ -1,6 +1,7 @@
 import os
 import pg
 import term
+import sqlite
 
 struct Modules {
 	id int
@@ -10,7 +11,30 @@ struct Modules {
 	//nr_downloads int
 }
 
-fn test_orm() {
+fn test_orm_sqlite() {
+	db := sqlite.connect(':memory:') or { panic(err) }
+	/*
+	db.exec("drop table if exists users")
+	db.exec("create table users (id integer primary key, name text default '');")
+
+	db.exec("insert into users (name) values ('Sam')")
+	db.exec("insert into users (name) values ('Peter')")
+	db.exec("insert into users (name) values ('Kate')")
+	nr_users := sql db {
+		//select count from modules
+	}
+	assert nr_users == 3
+	println('nr_users=')
+	println(nr_users)
+	//nr_modules := db.select count from modules
+	//nr_modules := db.select count from Modules where id == 1
+	//nr_modules := db.select count from Modules where
+		//name == 'Bob' && id == 1
+	*/
+}
+
+
+fn test_orm_pg() {
 	dbname := os.getenv('VDB_NAME')
 	dbuser := os.getenv('VDB_USER')
 	if dbname == '' || dbuser == '' {
@@ -18,6 +42,7 @@ fn test_orm() {
 		return
 	}
 	db := pg.connect(dbname: dbname, user: dbuser) or { panic(err) }
+	_ = db
 /*
 	//nr_modules := db.select count from modules
 	//nr_modules := db.select count from Modules where id == 1

vlib/sqlite/sqlite.v

@@ -27,9 +27,11 @@ fn C.sqlite3_finalize()
 fn C.sqlite3_column_count(voidptr) int
 
 // Opens the connection with a database.
-pub fn connect(path string) DB {
+pub fn connect(path string) ?DB {
 	db := &C.sqlite3(0)
-	C.sqlite3_open(path.str, &db)
+	if C.sqlite3_open(path.str, &db) != 0 {
+		return error('sqlite db error')
+	}
 	return DB{
 		conn: db
 	}

vlib/v/ast/ast.v

@@ -11,9 +11,9 @@ pub type TypeDecl = AliasTypeDecl | FnTypeDecl | SumTypeDecl
 
 pub type Expr = AnonFn | ArrayInit | AsCast | AssignExpr | Assoc | BoolLiteral | CallExpr |
 	CastExpr | CharLiteral | ComptimeCall | ConcatExpr | EnumVal | FloatLiteral | Ident | IfExpr |
-	IfGuardExpr | IndexExpr | InfixExpr | IntegerLiteral | MapInit | MatchExpr | None | OrExpr |
-	ParExpr | PostfixExpr | PrefixExpr | RangeExpr | SelectorExpr | SizeOf | StringInterLiteral |
-	StringLiteral | StructInit | Type | TypeOf | Likely
+	IfGuardExpr | IndexExpr | InfixExpr | IntegerLiteral | Likely | MapInit | MatchExpr | None |
+	OrExpr | ParExpr | PostfixExpr | PrefixExpr | RangeExpr | SelectorExpr | SizeOf | SqlExpr |
+	StringInterLiteral | StringLiteral | StructInit | Type | TypeOf
 
 pub type Stmt = AssertStmt | AssignStmt | Attr | Block | BranchStmt | Comment | CompIf | ConstDecl |
 	DeferStmt | EnumDecl | ExprStmt | FnDecl | ForCStmt | ForInStmt | ForStmt | GlobalDecl | GoStmt |
@@ -764,8 +764,8 @@ pub:
 
 pub struct Likely {
 pub:
-	expr     Expr
-	pos      token.Position
+	expr      Expr
+	pos       token.Position
 	is_likely bool // false for _unlikely_
 }
 
@@ -796,7 +796,6 @@ pub:
 	method_name string
 	left        Expr
 	is_vweb     bool
-	// vweb_stmts  []Stmt
 	vweb_tmpl   File
 pub mut:
 	sym         table.TypeSymbol
@@ -804,8 +803,12 @@ pub mut:
 
 pub struct None {
 pub:
-	pos  token.Position
-	foo  int // todo
+	pos token.Position
+	foo int // todo
+}
+
+pub struct SqlExpr {
+	typ table.Type
 }
 
 [inline]

vlib/v/gen/cgen.v

@@ -10,7 +10,6 @@ import v.pref
 import v.token
 import v.util
 import v.depgraph
-import term
 
 // NB: keywords after 'new' are reserved in C++
 const (
@@ -1481,6 +1480,9 @@ fn (mut g Gen) expr(node ast.Expr) {
 		ast.None {
 			g.write('opt_none()')
 		}
+		ast.OrExpr {
+			// this should never appear here
+		}
 		ast.ParExpr {
 			g.write('(')
 			g.expr(it.expr)
@@ -1501,6 +1503,9 @@ fn (mut g Gen) expr(node ast.Expr) {
 			// g.write(')')
 			g.is_amp = false
 		}
+		ast.RangeExpr {
+			// Only used in IndexExpr
+			}
 		ast.SizeOf {
 			mut styp := it.type_name
 			if it.type_name == '' {
@@ -1521,6 +1526,9 @@ fn (mut g Gen) expr(node ast.Expr) {
 			*/
 			g.write('sizeof($styp)')
 		}
+		ast.SqlExpr {
+			g.write('// sql expression')
+		}
 		ast.StringLiteral {
 			if it.is_raw {
 				escaped_val := it.val.replace_each(['"', '\\"', '\\', '\\\\'])
@@ -1583,10 +1591,10 @@ fn (mut g Gen) expr(node ast.Expr) {
 			g.expr(it.expr)
 			g.write(')')
 		}
-		else {
+		//else {
 			// #printf("node=%d\n", node.typ);
-			println(term.red('cgen.expr(): bad node ' + typeof(node)))
-		}
+			//println(term.red('cgen.expr(): bad node ' + typeof(node)))
+		//}
 	}
 }
 

vlib/v/gen/js/js.v

@@ -613,6 +613,9 @@ fn (mut g JsGen) expr(node ast.Expr) {
 		ast.SizeOf {
 			// TODO
 		}
+		ast.SqlExpr{
+			// TODO
+		}
 		ast.StringInterLiteral {
 			g.gen_string_inter_literal(it)
 		}

vlib/v/parser/pratt.v

@@ -19,8 +19,12 @@ pub fn (mut p Parser) expr(precedence int) ast.Expr {
 			node = p.parse_assign_ident()
 		}
 		.name {
-			node = p.name_expr()
-			p.is_stmt_ident = is_stmt_ident
+			if p.tok.lit == 'sql' && p.peek_tok.kind == .name {
+				node = p.sql_expr()
+			} else {
+				node = p.name_expr()
+				p.is_stmt_ident = is_stmt_ident
+			}
 		}
 		.string {
 			node = p.string_expr()

vlib/v/parser/sql.v

@@ -0,0 +1,10 @@
+// Copyright (c) 2019-2020 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 parser
+
+import v.ast
+
+fn (mut p Parser) sql_expr() ast.SqlExpr {
+	return ast.SqlExpr{}
+}