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-rw-r--r--crates/hir_expand/Cargo.toml1
-rw-r--r--crates/hir_expand/src/builtin_macro.rs14
-rw-r--r--crates/hir_expand/src/name.rs1
-rw-r--r--crates/hir_expand/src/quote.rs5
4 files changed, 19 insertions, 2 deletions
diff --git a/crates/hir_expand/Cargo.toml b/crates/hir_expand/Cargo.toml
index 76cb03126..7bb40ba9b 100644
--- a/crates/hir_expand/Cargo.toml
+++ b/crates/hir_expand/Cargo.toml
@@ -16,6 +16,7 @@ rustc-hash = "1.0.0"
16la-arena = { version = "0.2.0", path = "../../lib/arena" } 16la-arena = { version = "0.2.0", path = "../../lib/arena" }
17 17
18base_db = { path = "../base_db", version = "0.0.0" } 18base_db = { path = "../base_db", version = "0.0.0" }
19cfg = { path = "../cfg", version = "0.0.0" }
19syntax = { path = "../syntax", version = "0.0.0" } 20syntax = { path = "../syntax", version = "0.0.0" }
20parser = { path = "../parser", version = "0.0.0" } 21parser = { path = "../parser", version = "0.0.0" }
21profile = { path = "../profile", version = "0.0.0" } 22profile = { path = "../profile", version = "0.0.0" }
diff --git a/crates/hir_expand/src/builtin_macro.rs b/crates/hir_expand/src/builtin_macro.rs
index eb57ea7d6..b34f1a4f2 100644
--- a/crates/hir_expand/src/builtin_macro.rs
+++ b/crates/hir_expand/src/builtin_macro.rs
@@ -5,6 +5,7 @@ use crate::{
5}; 5};
6 6
7use base_db::{AnchoredPath, FileId}; 7use base_db::{AnchoredPath, FileId};
8use cfg::CfgExpr;
8use either::Either; 9use either::Either;
9use mbe::{parse_exprs_with_sep, parse_to_token_tree, ExpandResult}; 10use mbe::{parse_exprs_with_sep, parse_to_token_tree, ExpandResult};
10use parser::FragmentKind; 11use parser::FragmentKind;
@@ -97,6 +98,7 @@ register_builtin! {
97 (format_args_nl, FormatArgsNl) => format_args_expand, 98 (format_args_nl, FormatArgsNl) => format_args_expand,
98 (llvm_asm, LlvmAsm) => asm_expand, 99 (llvm_asm, LlvmAsm) => asm_expand,
99 (asm, Asm) => asm_expand, 100 (asm, Asm) => asm_expand,
101 (cfg, Cfg) => cfg_expand,
100 102
101 EAGER: 103 EAGER:
102 (compile_error, CompileError) => compile_error_expand, 104 (compile_error, CompileError) => compile_error_expand,
@@ -258,6 +260,18 @@ fn asm_expand(
258 ExpandResult::ok(expanded) 260 ExpandResult::ok(expanded)
259} 261}
260 262
263fn cfg_expand(
264 db: &dyn AstDatabase,
265 id: LazyMacroId,
266 tt: &tt::Subtree,
267) -> ExpandResult<tt::Subtree> {
268 let loc = db.lookup_intern_macro(id);
269 let expr = CfgExpr::parse(tt);
270 let enabled = db.crate_graph()[loc.krate].cfg_options.check(&expr) != Some(false);
271 let expanded = if enabled { quote!(true) } else { quote!(false) };
272 ExpandResult::ok(expanded)
273}
274
261fn unquote_str(lit: &tt::Literal) -> Option<String> { 275fn unquote_str(lit: &tt::Literal) -> Option<String> {
262 let lit = ast::make::tokens::literal(&lit.to_string()); 276 let lit = ast::make::tokens::literal(&lit.to_string());
263 let token = ast::String::cast(lit)?; 277 let token = ast::String::cast(lit)?;
diff --git a/crates/hir_expand/src/name.rs b/crates/hir_expand/src/name.rs
index c94fb580a..e833e032c 100644
--- a/crates/hir_expand/src/name.rs
+++ b/crates/hir_expand/src/name.rs
@@ -154,6 +154,7 @@ pub mod known {
154 macro_rules, 154 macro_rules,
155 derive, 155 derive,
156 doc, 156 doc,
157 cfg,
157 cfg_attr, 158 cfg_attr,
158 // Components of known path (value or mod name) 159 // Components of known path (value or mod name)
159 std, 160 std,
diff --git a/crates/hir_expand/src/quote.rs b/crates/hir_expand/src/quote.rs
index 219bc2097..08bc5aa49 100644
--- a/crates/hir_expand/src/quote.rs
+++ b/crates/hir_expand/src/quote.rs
@@ -188,8 +188,9 @@ macro_rules! impl_to_to_tokentrees {
188 188
189impl_to_to_tokentrees! { 189impl_to_to_tokentrees! {
190 u32 => self { tt::Literal{text: self.to_string().into(), id: tt::TokenId::unspecified()} }; 190 u32 => self { tt::Literal{text: self.to_string().into(), id: tt::TokenId::unspecified()} };
191 usize => self { tt::Literal{text: self.to_string().into(), id: tt::TokenId::unspecified()}}; 191 usize => self { tt::Literal{text: self.to_string().into(), id: tt::TokenId::unspecified()} };
192 i32 => self { tt::Literal{text: self.to_string().into(), id: tt::TokenId::unspecified()}}; 192 i32 => self { tt::Literal{text: self.to_string().into(), id: tt::TokenId::unspecified()} };
193 bool => self { tt::Ident{text: self.to_string().into(), id: tt::TokenId::unspecified()} };
193 tt::Leaf => self { self }; 194 tt::Leaf => self { self };
194 tt::Literal => self { self }; 195 tt::Literal => self { self };
195 tt::Ident => self { self }; 196 tt::Ident => self { self };