microsoft/qdk
Publicmirrored fromhttps://github.com/microsoft/qdkAvailable
compiler/qsc_frontend/src/incremental.rs
337lines · modecode
| 1 | // Copyright (c) Microsoft Corporation. |
| 2 | // Licensed under the MIT License. |
| 3 | |
| 4 | #[cfg(test)] |
| 5 | mod tests; |
| 6 | |
| 7 | use crate::{ |
| 8 | compile::{ |
| 9 | self, preprocess, AstPackage, CompileUnit, Offsetter, PackageStore, RuntimeCapabilityFlags, |
| 10 | SourceMap, |
| 11 | }, |
| 12 | error::WithSource, |
| 13 | lower::Lowerer, |
| 14 | resolve::{self, Resolver}, |
| 15 | typeck::{self, Checker}, |
| 16 | }; |
| 17 | use qsc_ast::{ |
| 18 | assigner::Assigner as AstAssigner, |
| 19 | ast::{self}, |
| 20 | mut_visit::MutVisitor, |
| 21 | validate::Validator as AstValidator, |
| 22 | visit::Visitor as AstVisitor, |
| 23 | }; |
| 24 | use qsc_data_structures::language_features::LanguageFeatures; |
| 25 | use qsc_hir::{ |
| 26 | assigner::Assigner as HirAssigner, |
| 27 | hir::{self, PackageId}, |
| 28 | validate::Validator as HirValidator, |
| 29 | visit::Visitor as HirVisitor, |
| 30 | }; |
| 31 | use std::mem::take; |
| 32 | |
| 33 | /// The frontend for an incremental compiler. |
| 34 | /// It is used to update a single `CompileUnit` |
| 35 | /// with additional sources. |
| 36 | pub struct Compiler { |
| 37 | ast_assigner: AstAssigner, |
| 38 | resolver: Resolver, |
| 39 | checker: Checker, |
| 40 | lowerer: Lowerer, |
| 41 | capabilities: RuntimeCapabilityFlags, |
| 42 | language_features: LanguageFeatures, |
| 43 | } |
| 44 | |
| 45 | pub type Error = WithSource<compile::Error>; |
| 46 | |
| 47 | /// The result of an incremental compilation. |
| 48 | /// These packages can be merged into the original |
| 49 | /// `CompileUnit` that was used for the incremental compilation. |
| 50 | #[derive(Debug)] |
| 51 | pub struct Increment { |
| 52 | pub ast: AstPackage, |
| 53 | pub hir: hir::Package, |
| 54 | } |
| 55 | |
| 56 | impl Compiler { |
| 57 | /// Creates a new compiler. |
| 58 | pub fn new( |
| 59 | store: &PackageStore, |
| 60 | dependencies: impl IntoIterator<Item = PackageId>, |
| 61 | capabilities: RuntimeCapabilityFlags, |
| 62 | language_features: LanguageFeatures, |
| 63 | ) -> Self { |
| 64 | let mut resolve_globals = resolve::GlobalTable::new(); |
| 65 | let mut typeck_globals = typeck::GlobalTable::new(); |
| 66 | let mut dropped_names = Vec::new(); |
| 67 | if let Some(unit) = store.get(PackageId::CORE) { |
| 68 | resolve_globals.add_external_package(PackageId::CORE, &unit.package); |
| 69 | typeck_globals.add_external_package(PackageId::CORE, &unit.package); |
| 70 | dropped_names.extend(unit.dropped_names.iter().cloned()); |
| 71 | } |
| 72 | |
| 73 | for id in dependencies { |
| 74 | let unit = store |
| 75 | .get(id) |
| 76 | .expect("dependency should be added to package store before compilation"); |
| 77 | resolve_globals.add_external_package(id, &unit.package); |
| 78 | typeck_globals.add_external_package(id, &unit.package); |
| 79 | dropped_names.extend(unit.dropped_names.iter().cloned()); |
| 80 | } |
| 81 | |
| 82 | Self { |
| 83 | ast_assigner: AstAssigner::new(), |
| 84 | resolver: Resolver::with_persistent_local_scope(resolve_globals, dropped_names), |
| 85 | checker: Checker::new(typeck_globals), |
| 86 | lowerer: Lowerer::new(), |
| 87 | capabilities, |
| 88 | language_features, |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | /// Compiles Q# fragments. |
| 93 | /// |
| 94 | /// Uses the assigners and other mutable state from the passed in |
| 95 | /// `CompileUnit` to guarantee uniqueness, however does not |
| 96 | /// update the `CompileUnit` with the resulting AST and HIR packages. |
| 97 | /// |
| 98 | /// The caller can use the returned packages to perform passes, |
| 99 | /// get information about the newly added items, or do other modifications. |
| 100 | /// It is then the caller's responsibility to merge |
| 101 | /// these packages into the current `CompileUnit`. |
| 102 | /// |
| 103 | /// This method calls an accumulator function with any errors returned |
| 104 | /// from each of the stages (parsing, lowering), instead of failing. |
| 105 | /// If the accumulator succeeds, compilation continues. |
| 106 | /// If the accumulator returns an error, compilation stops and the |
| 107 | /// error is returned to the caller. |
| 108 | pub fn compile_fragments<F, E>( |
| 109 | &mut self, |
| 110 | unit: &mut CompileUnit, |
| 111 | source_name: &str, |
| 112 | source_contents: &str, |
| 113 | mut accumulate_errors: F, |
| 114 | ) -> Result<Increment, E> |
| 115 | where |
| 116 | F: FnMut(Vec<Error>) -> Result<(), E>, |
| 117 | { |
| 118 | let (mut ast, parse_errors) = Self::parse_fragments( |
| 119 | &mut unit.sources, |
| 120 | source_name, |
| 121 | source_contents, |
| 122 | self.language_features, |
| 123 | ); |
| 124 | |
| 125 | accumulate_errors(parse_errors)?; |
| 126 | |
| 127 | let (hir, errors) = self.resolve_check_lower(unit, &mut ast); |
| 128 | |
| 129 | accumulate_errors(errors)?; |
| 130 | |
| 131 | Ok(Increment { |
| 132 | ast: AstPackage { |
| 133 | package: ast, |
| 134 | names: self.resolver.names().clone(), |
| 135 | locals: self.resolver.locals().clone(), |
| 136 | tys: self.checker.table().clone(), |
| 137 | }, |
| 138 | hir, |
| 139 | }) |
| 140 | } |
| 141 | |
| 142 | /// Compiles an entry expression. |
| 143 | /// |
| 144 | /// Uses the assigners and other mutable state from the passed in |
| 145 | /// `CompileUnit` to guarantee uniqueness, however does not |
| 146 | /// update the `CompileUnit` with the resulting AST and HIR packages. |
| 147 | /// |
| 148 | /// The caller can use the returned packages to perform passes, |
| 149 | /// get information about the newly added items, or do other modifications. |
| 150 | /// It is then the caller's responsibility to merge |
| 151 | /// these packages into the current `CompileUnit`. |
| 152 | pub fn compile_entry_expr( |
| 153 | &mut self, |
| 154 | unit: &mut CompileUnit, |
| 155 | source_contents: &str, |
| 156 | ) -> Result<Increment, Vec<Error>> { |
| 157 | let (mut ast, parse_errors) = |
| 158 | Self::parse_entry_expr(&mut unit.sources, source_contents, self.language_features); |
| 159 | |
| 160 | if !parse_errors.is_empty() { |
| 161 | return Err(parse_errors); |
| 162 | } |
| 163 | |
| 164 | let (hir, errors) = self.resolve_check_lower(unit, &mut ast); |
| 165 | |
| 166 | if !errors.is_empty() { |
| 167 | return Err(errors); |
| 168 | } |
| 169 | |
| 170 | Ok(Increment { |
| 171 | ast: AstPackage { |
| 172 | package: ast, |
| 173 | names: self.resolver.names().clone(), |
| 174 | locals: self.resolver.locals().clone(), |
| 175 | tys: self.checker.table().clone(), |
| 176 | }, |
| 177 | hir, |
| 178 | }) |
| 179 | } |
| 180 | |
| 181 | pub fn update(&mut self, unit: &mut CompileUnit, new: Increment) { |
| 182 | // Update the AST |
| 183 | unit.ast.package = self.concat_ast(take(&mut unit.ast.package), new.ast.package); |
| 184 | |
| 185 | // The new `Increment` will contain the names and tys |
| 186 | // from the original package as well, so just |
| 187 | // replace the current tables instead of extending. |
| 188 | unit.ast.names = new.ast.names; |
| 189 | unit.ast.tys = new.ast.tys; |
| 190 | unit.ast.locals = new.ast.locals; |
| 191 | |
| 192 | // Update the HIR |
| 193 | extend_hir(&mut unit.package, new.hir); |
| 194 | } |
| 195 | |
| 196 | fn resolve_check_lower( |
| 197 | &mut self, |
| 198 | unit: &mut CompileUnit, |
| 199 | ast: &mut ast::Package, |
| 200 | ) -> (hir::Package, Vec<Error>) { |
| 201 | let mut cond_compile = preprocess::Conditional::new(self.capabilities); |
| 202 | cond_compile.visit_package(ast); |
| 203 | |
| 204 | self.ast_assigner.visit_package(ast); |
| 205 | |
| 206 | self.resolver |
| 207 | .extend_dropped_names(cond_compile.into_names()); |
| 208 | self.resolver.bind_fragments(ast, &mut unit.assigner); |
| 209 | self.resolver.with(&mut unit.assigner).visit_package(ast); |
| 210 | |
| 211 | self.checker.check_package(self.resolver.names(), ast); |
| 212 | self.checker.solve(self.resolver.names()); |
| 213 | |
| 214 | let package = self.lower(&mut unit.assigner, &*ast); |
| 215 | |
| 216 | let errors = self |
| 217 | .resolver |
| 218 | .drain_errors() |
| 219 | .map(|e| compile::Error(e.into())) |
| 220 | .chain( |
| 221 | self.checker |
| 222 | .drain_errors() |
| 223 | .map(|e| compile::Error(e.into())), |
| 224 | ) |
| 225 | .chain( |
| 226 | self.lowerer |
| 227 | .drain_errors() |
| 228 | .map(|e| compile::Error(e.into())), |
| 229 | ) |
| 230 | .map(|e| WithSource::from_map(&unit.sources, e)) |
| 231 | .collect::<Vec<_>>(); |
| 232 | |
| 233 | if !errors.is_empty() { |
| 234 | self.lowerer.clear_items(); |
| 235 | } |
| 236 | |
| 237 | (package, errors) |
| 238 | } |
| 239 | |
| 240 | /// Creates a new `Package` by combining two packages. |
| 241 | /// The two packages should not contain any conflicting `NodeId`s. |
| 242 | /// Entry expressions are ignored. |
| 243 | #[must_use] |
| 244 | fn concat_ast(&mut self, mut left: ast::Package, right: ast::Package) -> ast::Package { |
| 245 | let mut nodes = Vec::with_capacity(left.nodes.len() + right.nodes.len()); |
| 246 | nodes.extend(left.nodes.into_vec()); |
| 247 | nodes.extend(right.nodes.into_vec()); |
| 248 | left.id = self.ast_assigner.next_id(); |
| 249 | left.nodes = nodes.into_boxed_slice(); |
| 250 | |
| 251 | AstValidator::default().visit_package(&left); |
| 252 | left |
| 253 | } |
| 254 | |
| 255 | fn parse_entry_expr( |
| 256 | sources: &mut SourceMap, |
| 257 | source_contents: &str, |
| 258 | language_features: LanguageFeatures, |
| 259 | ) -> (ast::Package, Vec<Error>) { |
| 260 | let offset = sources.push("<entry>".into(), source_contents.into()); |
| 261 | |
| 262 | let (mut expr, errors) = qsc_parse::expr(source_contents, language_features); |
| 263 | |
| 264 | let mut offsetter = Offsetter(offset); |
| 265 | offsetter.visit_expr(&mut expr); |
| 266 | |
| 267 | let package = ast::Package { |
| 268 | id: ast::NodeId::default(), |
| 269 | nodes: Box::default(), |
| 270 | entry: Some(expr), |
| 271 | }; |
| 272 | |
| 273 | (package, with_source(errors, sources, offset)) |
| 274 | } |
| 275 | |
| 276 | fn parse_fragments( |
| 277 | sources: &mut SourceMap, |
| 278 | source_name: &str, |
| 279 | source_contents: &str, |
| 280 | features: LanguageFeatures, |
| 281 | ) -> (ast::Package, Vec<Error>) { |
| 282 | let offset = sources.push(source_name.into(), source_contents.into()); |
| 283 | |
| 284 | let (mut top_level_nodes, errors) = qsc_parse::top_level_nodes(source_contents, features); |
| 285 | let mut offsetter = Offsetter(offset); |
| 286 | for node in &mut top_level_nodes { |
| 287 | match node { |
| 288 | ast::TopLevelNode::Namespace(ns) => offsetter.visit_namespace(ns), |
| 289 | ast::TopLevelNode::Stmt(stmt) => offsetter.visit_stmt(stmt), |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | let package = ast::Package { |
| 294 | id: ast::NodeId::default(), |
| 295 | nodes: top_level_nodes.into_boxed_slice(), |
| 296 | entry: None, |
| 297 | }; |
| 298 | |
| 299 | (package, with_source(errors, sources, offset)) |
| 300 | } |
| 301 | |
| 302 | fn lower(&mut self, hir_assigner: &mut HirAssigner, package: &ast::Package) -> hir::Package { |
| 303 | self.lowerer |
| 304 | .with(hir_assigner, self.resolver.names(), self.checker.table()) |
| 305 | .lower_package(package) |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | /// Extends the `Package` with the contents of another `Package`. |
| 310 | /// `other` should not contain any `LocalItemId`s |
| 311 | /// that conflict with the current `Package`. |
| 312 | /// The entry expression from `other` will be ignored. |
| 313 | fn extend_hir(this: &mut hir::Package, mut other: hir::Package) { |
| 314 | for (k, v) in other.items.drain() { |
| 315 | this.items.insert(k, v); |
| 316 | } |
| 317 | |
| 318 | this.stmts.extend(other.stmts); |
| 319 | |
| 320 | HirValidator::default().visit_package(this); |
| 321 | } |
| 322 | |
| 323 | fn with_source( |
| 324 | errors: Vec<qsc_parse::Error>, |
| 325 | sources: &SourceMap, |
| 326 | offset: u32, |
| 327 | ) -> Vec<WithSource<compile::Error>> { |
| 328 | errors |
| 329 | .into_iter() |
| 330 | .map(|e| { |
| 331 | WithSource::from_map( |
| 332 | sources, |
| 333 | compile::Error(compile::ErrorKind::Parse(e.with_offset(offset))), |
| 334 | ) |
| 335 | }) |
| 336 | .collect() |
| 337 | } |
| 338 | |