bjoernager/rust
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syntax: add some more extension helper methods

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This commit is contained in:
Erick Tryzelaar 2014-07-27 15:11:02 -07:00
parent 87c78fd7e3
commit 3b7c25ce5b
1 changed files with 52 additions and 0 deletions
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52
src/libsyntax/ext/build.rs
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@ -170,6 +170,13 @@ pub trait AstBuilder {
subpats: Vec<Gc<ast::Pat>>) -> Gc<ast::Pat>;
fn pat_struct(&self, span: Span,
path: ast::Path, field_pats: Vec<ast::FieldPat> ) -> Gc<ast::Pat>;
fn pat_tuple(&self, span: Span, pats: Vec<Gc<ast::Pat>>) -> Gc<ast::Pat>;
fn pat_some(&self, span: Span, pat: Gc<ast::Pat>) -> Gc<ast::Pat>;
fn pat_none(&self, span: Span) -> Gc<ast::Pat>;
fn pat_ok(&self, span: Span, pat: Gc<ast::Pat>) -> Gc<ast::Pat>;
fn pat_err(&self, span: Span, pat: Gc<ast::Pat>) -> Gc<ast::Pat>;
fn arm(&self, span: Span, pats: Vec<Gc<ast::Pat>> , expr: Gc<ast::Expr>) -> ast::Arm;
fn arm_unreachable(&self, span: Span) -> ast::Arm;
@ -178,6 +185,7 @@ pub trait AstBuilder {
fn expr_if(&self, span: Span,
cond: Gc<ast::Expr>, then: Gc<ast::Expr>,
els: Option<Gc<ast::Expr>>) -> Gc<ast::Expr>;
fn expr_loop(&self, span: Span, block: P<ast::Block>) -> Gc<ast::Expr>;
fn lambda_fn_decl(&self, span: Span,
fn_decl: P<ast::FnDecl>, blk: P<ast::Block>) -> Gc<ast::Expr>;
@ -777,6 +785,46 @@ impl<'a> AstBuilder for ExtCtxt<'a> {
let pat = ast::PatStruct(path, field_pats, false);
self.pat(span, pat)
}
fn pat_tuple(&self, span: Span, pats: Vec<Gc<ast::Pat>>) -> Gc<ast::Pat> {
let pat = ast::PatTup(pats);
self.pat(span, pat)
}
fn pat_some(&self, span: Span, pat: Gc<ast::Pat>) -> Gc<ast::Pat> {
let some = vec!(
self.ident_of("std"),
self.ident_of("option"),
self.ident_of("Some"));
let path = self.path_global(span, some);
self.pat_enum(span, path, vec!(pat))
}
fn pat_none(&self, span: Span) -> Gc<ast::Pat> {
let some = vec!(
self.ident_of("std"),
self.ident_of("option"),
self.ident_of("None"));
let path = self.path_global(span, some);
self.pat_enum(span, path, vec!())
}
fn pat_ok(&self, span: Span, pat: Gc<ast::Pat>) -> Gc<ast::Pat> {
let some = vec!(
self.ident_of("std"),
self.ident_of("result"),
self.ident_of("Ok"));
let path = self.path_global(span, some);
self.pat_enum(span, path, vec!(pat))
}
fn pat_err(&self, span: Span, pat: Gc<ast::Pat>) -> Gc<ast::Pat> {
let some = vec!(
self.ident_of("std"),
self.ident_of("result"),
self.ident_of("Err"));
let path = self.path_global(span, some);
self.pat_enum(span, path, vec!(pat))
}
fn arm(&self, _span: Span, pats: Vec<Gc<ast::Pat>> , expr: Gc<ast::Expr>) -> ast::Arm {
ast::Arm {
@ -803,6 +851,10 @@ impl<'a> AstBuilder for ExtCtxt<'a> {
self.expr(span, ast::ExprIf(cond, self.block_expr(then), els))
}
fn expr_loop(&self, span: Span, block: P<ast::Block>) -> Gc<ast::Expr> {
self.expr(span, ast::ExprLoop(block, None))
}
fn lambda_fn_decl(&self, span: Span,
fn_decl: P<ast::FnDecl>, blk: P<ast::Block>) -> Gc<ast::Expr> {
self.expr(span, ast::ExprFnBlock(fn_decl, blk))