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-rw-r--r--askama_derive/src/generator.rs218
1 files changed, 109 insertions, 109 deletions
diff --git a/askama_derive/src/generator.rs b/askama_derive/src/generator.rs
index 8c95386..3e050d5 100644
--- a/askama_derive/src/generator.rs
+++ b/askama_derive/src/generator.rs
@@ -553,8 +553,8 @@ impl<'a> Generator<'a> {
fn write_let(&mut self, ws: WS, var: &'a Target, val: &Expr) {
self.handle_ws(ws);
- let mut code = String::new();
- self.visit_expr(val, &mut code);
+ let mut buf = Buffer::new(0);
+ self.visit_expr(&mut buf, val);
match *var {
Target::Name(name) => {
@@ -565,7 +565,7 @@ impl<'a> Generator<'a> {
self.buf.write(name);
}
}
- self.buf.write(&format!(" = {};", &code));
+ self.buf.write(&format!(" = {};", &buf.buf));
}
fn write_block(&mut self, ws1: WS, name: &str, ws2: WS) {
@@ -577,9 +577,9 @@ impl<'a> Generator<'a> {
fn write_expr(&mut self, ws: WS, s: &Expr) {
self.handle_ws(ws);
- let mut code = String::new();
- let wrapped = self.visit_expr(s, &mut code);
- self.buf.writeln(&format!("let askama_expr = &{};", code));
+ let mut buf = Buffer::new(0);
+ let wrapped = self.visit_expr(&mut buf, s);
+ self.buf.writeln(&format!("let askama_expr = &{};", &buf.buf));
use self::DisplayWrap::*;
use super::input::EscapeMode::*;
@@ -618,83 +618,83 @@ impl<'a> Generator<'a> {
/* Visitor methods for expression types */
fn visit_expr_root(&mut self, expr: &Expr) -> String {
- let mut code = String::new();
- self.visit_expr(expr, &mut code);
- code
+ let mut buf = Buffer::new(0);
+ self.visit_expr(&mut buf, expr);
+ buf.buf
}
- fn visit_expr(&mut self, expr: &Expr, code: &mut String) -> DisplayWrap {
+ fn visit_expr(&mut self, buf: &mut Buffer, expr: &Expr) -> DisplayWrap {
match *expr {
- Expr::NumLit(s) => self.visit_num_lit(s, code),
- Expr::StrLit(s) => self.visit_str_lit(s, code),
- Expr::Var(s) => self.visit_var(s, code),
- Expr::Path(ref path) => self.visit_path(path, code),
- Expr::Array(ref elements) => self.visit_array(elements, code),
- Expr::Attr(ref obj, name) => self.visit_attr(obj, name, code),
- Expr::Index(ref obj, ref key) => self.visit_index(obj, key, code),
- Expr::Filter(name, ref args) => self.visit_filter(name, args, code),
- Expr::Unary(op, ref inner) => self.visit_unary(op, inner, code),
- Expr::BinOp(op, ref left, ref right) => self.visit_binop(op, left, right, code),
- Expr::Range(op, ref left, ref right) => self.visit_range(op, left, right, code),
- Expr::Group(ref inner) => self.visit_group(inner, code),
+ Expr::NumLit(s) => self.visit_num_lit(buf, s),
+ Expr::StrLit(s) => self.visit_str_lit(buf, s),
+ Expr::Var(s) => self.visit_var(buf, s),
+ Expr::Path(ref path) => self.visit_path(buf, path),
+ Expr::Array(ref elements) => self.visit_array(buf, elements),
+ Expr::Attr(ref obj, name) => self.visit_attr(buf, obj, name),
+ Expr::Index(ref obj, ref key) => self.visit_index(buf, obj, key),
+ Expr::Filter(name, ref args) => self.visit_filter(buf, name, args),
+ Expr::Unary(op, ref inner) => self.visit_unary(buf, op, inner),
+ Expr::BinOp(op, ref left, ref right) => self.visit_binop(buf, op, left, right),
+ Expr::Range(op, ref left, ref right) => self.visit_range(buf, op, left, right),
+ Expr::Group(ref inner) => self.visit_group(buf, inner),
Expr::MethodCall(ref obj, method, ref args) => {
- self.visit_method_call(obj, method, args, code)
+ self.visit_method_call(buf, obj, method, args)
}
}
}
fn visit_match_variant(&mut self, param: &MatchVariant) -> DisplayWrap {
- let mut code = String::new();
+ let mut buf = Buffer::new(0);
let wrapped = match *param {
MatchVariant::StrLit(s) => {
- code.push_str("&");
- self.visit_str_lit(s, &mut code)
+ buf.write("&");
+ self.visit_str_lit(&mut buf, s)
}
- MatchVariant::NumLit(s) => self.visit_num_lit(s, &mut code),
+ MatchVariant::NumLit(s) => self.visit_num_lit(&mut buf, s),
MatchVariant::Name(s) => {
- code.push_str(s);
+ buf.write(s);
DisplayWrap::Unwrapped
}
MatchVariant::Path(ref s) => {
- code.push_str(&s.join("::"));
+ buf.write(&s.join("::"));
DisplayWrap::Unwrapped
}
};
- self.buf.write(&code);
+ self.buf.write(&buf.buf);
wrapped
}
fn visit_match_param(&mut self, param: &MatchParameter) -> DisplayWrap {
- let mut code = String::new();
+ let mut buf = Buffer::new(0);
let wrapped = match *param {
- MatchParameter::NumLit(s) => self.visit_num_lit(s, &mut code),
- MatchParameter::StrLit(s) => self.visit_str_lit(s, &mut code),
+ MatchParameter::NumLit(s) => self.visit_num_lit(&mut buf, s),
+ MatchParameter::StrLit(s) => self.visit_str_lit(&mut buf, s),
MatchParameter::Name(s) => {
- code.push_str(s);
+ buf.write(s);
DisplayWrap::Unwrapped
}
};
- self.buf.write(&code);
+ self.buf.write(&buf.buf);
wrapped
}
- fn visit_filter(&mut self, name: &str, args: &[Expr], code: &mut String) -> DisplayWrap {
+ fn visit_filter(&mut self, buf: &mut Buffer, name: &str, args: &[Expr]) -> DisplayWrap {
if name == "format" {
- self._visit_format_filter(args, code);
+ self._visit_format_filter(buf, args);
return DisplayWrap::Unwrapped;
} else if name == "join" {
- self._visit_join_filter(args, code);
+ self._visit_join_filter(buf, args);
return DisplayWrap::Unwrapped;
}
if filters::BUILT_IN_FILTERS.contains(&name) {
- code.push_str(&format!("::askama::filters::{}(&", name));
+ buf.write(&format!("::askama::filters::{}(&", name));
} else {
- code.push_str(&format!("filters::{}(&", name));
+ buf.write(&format!("filters::{}(&", name));
}
- self._visit_args(args, code);
- code.push_str(")?");
+ self._visit_args(buf, args);
+ buf.write(")?");
if name == "safe" || name == "escape" || name == "e" || name == "json" {
DisplayWrap::Wrapped
} else {
@@ -702,31 +702,31 @@ impl<'a> Generator<'a> {
}
}
- fn _visit_format_filter(&mut self, args: &[Expr], code: &mut String) {
- code.push_str("format!(");
- self._visit_args(args, code);
- code.push_str(")");
+ fn _visit_format_filter(&mut self, buf: &mut Buffer, args: &[Expr]) {
+ buf.write("format!(");
+ self._visit_args(buf, args);
+ buf.write(")");
}
// Force type coercion on first argument to `join` filter (see #39).
- fn _visit_join_filter(&mut self, args: &[Expr], code: &mut String) {
- code.push_str("::askama::filters::join((&");
+ fn _visit_join_filter(&mut self, buf: &mut Buffer, args: &[Expr]) {
+ buf.write("::askama::filters::join((&");
for (i, arg) in args.iter().enumerate() {
if i > 0 {
- code.push_str(", &");
+ buf.write(", &");
}
- self.visit_expr(arg, code);
+ self.visit_expr(buf, arg);
if i == 0 {
- code.push_str(").into_iter()");
+ buf.write(").into_iter()");
}
}
- code.push_str(")?");
+ buf.write(")?");
}
- fn _visit_args(&mut self, args: &[Expr], code: &mut String) {
+ fn _visit_args(&mut self, buf: &mut Buffer, args: &[Expr]) {
for (i, arg) in args.iter().enumerate() {
if i > 0 {
- code.push_str(", &");
+ buf.write(", &");
}
let intercept = match *arg {
@@ -735,152 +735,152 @@ impl<'a> Generator<'a> {
};
if intercept {
- let offset = code.len();
- self.visit_expr(arg, code);
+ let offset = buf.buf.len();
+ self.visit_expr(buf, arg);
let idx = self.vars;
self.vars += 1;
self.buf
- .writeln(&format!("let var{} = {};", idx, &code[offset..]));
- code.truncate(offset);
- code.push_str(&format!("var{}", idx));
+ .writeln(&format!("let var{} = {};", idx, &buf.buf[offset..]));
+ buf.buf.truncate(offset);
+ buf.write(&format!("var{}", idx));
} else {
- self.visit_expr(arg, code);
+ self.visit_expr(buf, arg);
}
}
}
- fn visit_attr(&mut self, obj: &Expr, attr: &str, code: &mut String) -> DisplayWrap {
+ fn visit_attr(&mut self, buf: &mut Buffer, obj: &Expr, attr: &str) -> DisplayWrap {
if let Expr::Var(name) = *obj {
if name == "loop" {
- code.push_str("_loop_index");
+ buf.write("_loop_index");
if attr == "index" {
- code.push_str(" + 1");
+ buf.write(" + 1");
return DisplayWrap::Unwrapped;
} else if attr == "index0" {
return DisplayWrap::Unwrapped;
} else if attr == "first" {
- code.push_str(" == 0");
+ buf.write(" == 0");
return DisplayWrap::Unwrapped;
} else {
panic!("unknown loop variable");
}
}
}
- self.visit_expr(obj, code);
- code.push_str(&format!(".{}", attr));
+ self.visit_expr(buf, obj);
+ buf.write(&format!(".{}", attr));
DisplayWrap::Unwrapped
}
- fn visit_index(&mut self, obj: &Expr, key: &Expr, code: &mut String) -> DisplayWrap {
- code.push_str("&");
- self.visit_expr(obj, code);
- code.push_str("[");
- self.visit_expr(key, code);
- code.push_str("]");
+ fn visit_index(&mut self, buf: &mut Buffer, obj: &Expr, key: &Expr) -> DisplayWrap {
+ buf.write("&");
+ self.visit_expr(buf, obj);
+ buf.write("[");
+ self.visit_expr(buf, key);
+ buf.write("]");
DisplayWrap::Unwrapped
}
fn visit_method_call(
&mut self,
+ buf: &mut Buffer,
obj: &Expr,
method: &str,
args: &[Expr],
- code: &mut String,
) -> DisplayWrap {
if let Expr::Var("self") = obj {
- code.push_str("self");
+ buf.write("self");
} else {
- self.visit_expr(obj, code);
+ self.visit_expr(buf, obj);
}
- code.push_str(&format!(".{}(", method));
- self._visit_args(args, code);
- code.push_str(")");
+ buf.write(&format!(".{}(", method));
+ self._visit_args(buf, args);
+ buf.write(")");
DisplayWrap::Unwrapped
}
- fn visit_unary(&mut self, op: &str, inner: &Expr, code: &mut String) -> DisplayWrap {
- code.push_str(op);
- self.visit_expr(inner, code);
+ fn visit_unary(&mut self, buf: &mut Buffer, op: &str, inner: &Expr) -> DisplayWrap {
+ buf.write(op);
+ self.visit_expr(buf, inner);
DisplayWrap::Unwrapped
}
fn visit_range(
&mut self,
+ buf: &mut Buffer,
op: &str,
left: &Option<Box<Expr>>,
right: &Option<Box<Expr>>,
- code: &mut String,
) -> DisplayWrap {
if let Some(left) = left {
- self.visit_expr(left, code);
+ self.visit_expr(buf, left);
}
- code.push_str(op);
+ buf.write(op);
if let Some(right) = right {
- self.visit_expr(right, code);
+ self.visit_expr(buf, right);
}
DisplayWrap::Unwrapped
}
fn visit_binop(
&mut self,
+ buf: &mut Buffer,
op: &str,
left: &Expr,
right: &Expr,
- code: &mut String,
) -> DisplayWrap {
- self.visit_expr(left, code);
- code.push_str(&format!(" {} ", op));
- self.visit_expr(right, code);
+ self.visit_expr(buf, left);
+ buf.write(&format!(" {} ", op));
+ self.visit_expr(buf, right);
DisplayWrap::Unwrapped
}
- fn visit_group(&mut self, inner: &Expr, code: &mut String) -> DisplayWrap {
- code.push_str("(");
- self.visit_expr(inner, code);
- code.push_str(")");
+ fn visit_group(&mut self, buf: &mut Buffer, inner: &Expr) -> DisplayWrap {
+ buf.write("(");
+ self.visit_expr(buf, inner);
+ buf.write(")");
DisplayWrap::Unwrapped
}
- fn visit_array(&mut self, elements: &[Expr], code: &mut String) -> DisplayWrap {
- code.push_str("[");
+ fn visit_array(&mut self, buf: &mut Buffer, elements: &[Expr]) -> DisplayWrap {
+ buf.write("[");
for (i, el) in elements.iter().enumerate() {
if i > 0 {
- code.push_str(", ");
+ buf.write(", ");
}
- self.visit_expr(el, code);
+ self.visit_expr(buf, el);
}
- code.push_str("]");
+ buf.write("]");
DisplayWrap::Unwrapped
}
- fn visit_path(&mut self, path: &[&str], code: &mut String) -> DisplayWrap {
+ fn visit_path(&mut self, buf: &mut Buffer, path: &[&str]) -> DisplayWrap {
for (i, part) in path.iter().enumerate() {
if i > 0 {
- code.push_str("::");
+ buf.write("::");
}
- code.push_str(part);
+ buf.write(part);
}
DisplayWrap::Unwrapped
}
- fn visit_var(&mut self, s: &str, code: &mut String) -> DisplayWrap {
+ fn visit_var(&mut self, buf: &mut Buffer, s: &str) -> DisplayWrap {
if self.locals.contains(s) {
- code.push_str(s);
+ buf.write(s);
} else {
- code.push_str("self.");
- code.push_str(s);
+ buf.write("self.");
+ buf.write(s);
}
DisplayWrap::Unwrapped
}
- fn visit_str_lit(&mut self, s: &str, code: &mut String) -> DisplayWrap {
- code.push_str(&format!("\"{}\"", s));
+ fn visit_str_lit(&mut self, buf: &mut Buffer, s: &str) -> DisplayWrap {
+ buf.write(&format!("\"{}\"", s));
DisplayWrap::Unwrapped
}
- fn visit_num_lit(&mut self, s: &str, code: &mut String) -> DisplayWrap {
- code.push_str(s);
+ fn visit_num_lit(&mut self, buf: &mut Buffer, s: &str) -> DisplayWrap {
+ buf.write(s);
DisplayWrap::Unwrapped
}
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