diff options
Diffstat (limited to 'askama_shared/src/generator.rs')
-rw-r--r-- | askama_shared/src/generator.rs | 39 |
1 files changed, 27 insertions, 12 deletions
diff --git a/askama_shared/src/generator.rs b/askama_shared/src/generator.rs index 24a4a71..fc94977 100644 --- a/askama_shared/src/generator.rs +++ b/askama_shared/src/generator.rs @@ -3,7 +3,8 @@ use crate::filters; use crate::heritage::{Context, Heritage}; use crate::input::{Source, TemplateInput}; use crate::parser::{ - parse, Cond, Expr, MatchParameter, MatchParameters, MatchVariant, Node, Target, When, Ws, + parse, Cond, CondTest, Expr, MatchParameter, MatchParameters, MatchVariant, Node, Target, When, + Ws, }; use proc_macro2::Span; @@ -483,23 +484,38 @@ impl<'a, S: std::hash::BuildHasher> Generator<'a, S> { self.locals.pop(); } + self.locals.push(); let mut arm_size = 0; - if let Some(expr) = cond { + if let Some(CondTest { target, expr }) = cond { if i == 0 { buf.write("if "); } else { buf.dedent()?; buf.write("} else if "); } - // The following syntax `*(&(...) as &bool)` is used to - // trigger Rust's automatic dereferencing, to coerce - // e.g. `&&&&&bool` to `bool`. First `&(...) as &bool` - // coerces e.g. `&&&bool` to `&bool`. Then `*(&bool)` - // finally dereferences it to `bool`. - buf.write("*(&("); - let expr_code = self.visit_expr_root(expr)?; - buf.write(&expr_code); - buf.write(") as &bool)"); + + if let Some((variant, params)) = target { + let mut expr_buf = Buffer::new(0); + self.visit_expr(&mut expr_buf, expr)?; + buf.write("let "); + self.visit_match_variant(buf, variant); + if let Some(params) = params { + self.visit_match_params(buf, params); + } + buf.write(" = &("); + buf.write(&expr_buf.buf); + buf.write(")"); + } else { + // The following syntax `*(&(...) as &bool)` is used to + // trigger Rust's automatic dereferencing, to coerce + // e.g. `&&&&&bool` to `bool`. First `&(...) as &bool` + // coerces e.g. `&&&bool` to `&bool`. Then `*(&bool)` + // finally dereferences it to `bool`. + buf.write("*(&("); + let expr_code = self.visit_expr_root(expr)?; + buf.write(&expr_code); + buf.write(") as &bool)"); + } } else { buf.dedent()?; buf.write("} else"); @@ -507,7 +523,6 @@ impl<'a, S: std::hash::BuildHasher> Generator<'a, S> { } buf.writeln(" {")?; - self.locals.push(); arm_size += self.handle(ctx, nodes, buf, AstLevel::Nested)?; arm_sizes.push(arm_size); |