feat(query): implement self-hosted Query API (Phase 4)#131
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Implements Phase 4 of the self-hosting roadmap: Query API in Gradient. **New File: compiler/query.gr** Core Types: - Session: compilation session holding parsed/type-checked results - QueryEngine: query execution engine - CheckResult: result of type checking with diagnostics - SymbolInfo: information about top-level symbols - TypeAtResult: type information at specific positions - Diagnostic: error/warning/info messages with position Enums: - Severity: ErrorSeverity, WarningSeverity, InfoSeverity - Phase: LexerPhase, ParserPhase, TypecheckerPhase, IrPhase, CodegenPhase - SymbolKind: FunctionSymbol, ExternFunctionSymbol, VariableSymbol, etc. Core Functions: - new_query_engine: create query engine - new_session: create session from source code - new_session_from_file: create session from file - check: check source and return diagnostics - get_symbols: return all top-level symbols - type_at: query type at specific position - symbol_at: get symbol info at position - has_errors, error_count: error checking utilities Utility Functions: - severity_to_string: convert severity to string - phase_to_string: convert phase to string - symbol_kind_to_string: convert symbol kind to string **Tests:** - all_modules_plus_query_concatenated_parses_and_typechecks_clean ✅ - query_gr_concatenated_exposes_expected_symbols ✅ All 10 self-hosting tests now pass. Part of #116 (Self-Hosting Epic) Closes #123 (Phase 4: Query API)
graydeon
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Apr 11, 2026
Implements Phase 4 of the self-hosting roadmap: Query API in Gradient. **New File: compiler/query.gr** Core Types: - Session: compilation session holding parsed/type-checked results - QueryEngine: query execution engine - CheckResult: result of type checking with diagnostics - SymbolInfo: information about top-level symbols - TypeAtResult: type information at specific positions - Diagnostic: error/warning/info messages with position Enums: - Severity: ErrorSeverity, WarningSeverity, InfoSeverity - Phase: LexerPhase, ParserPhase, TypecheckerPhase, IrPhase, CodegenPhase - SymbolKind: FunctionSymbol, ExternFunctionSymbol, VariableSymbol, etc. Core Functions: - new_query_engine: create query engine - new_session: create session from source code - new_session_from_file: create session from file - check: check source and return diagnostics - get_symbols: return all top-level symbols - type_at: query type at specific position - symbol_at: get symbol info at position - has_errors, error_count: error checking utilities Utility Functions: - severity_to_string: convert severity to string - phase_to_string: convert phase to string - symbol_kind_to_string: convert symbol kind to string **Tests:** - all_modules_plus_query_concatenated_parses_and_typechecks_clean ✅ - query_gr_concatenated_exposes_expected_symbols ✅ All 10 self-hosting tests now pass. Part of #116 (Self-Hosting Epic) Closes #123 (Phase 4: Query API)
graydeon
added a commit
that referenced
this pull request
Apr 11, 2026
Implements Phase 4 of the self-hosting roadmap: Query API in Gradient. **New File: compiler/query.gr** Core Types: - Session: compilation session holding parsed/type-checked results - QueryEngine: query execution engine - CheckResult: result of type checking with diagnostics - SymbolInfo: information about top-level symbols - TypeAtResult: type information at specific positions - Diagnostic: error/warning/info messages with position Enums: - Severity: ErrorSeverity, WarningSeverity, InfoSeverity - Phase: LexerPhase, ParserPhase, TypecheckerPhase, IrPhase, CodegenPhase - SymbolKind: FunctionSymbol, ExternFunctionSymbol, VariableSymbol, etc. Core Functions: - new_query_engine: create query engine - new_session: create session from source code - new_session_from_file: create session from file - check: check source and return diagnostics - get_symbols: return all top-level symbols - type_at: query type at specific position - symbol_at: get symbol info at position - has_errors, error_count: error checking utilities Utility Functions: - severity_to_string: convert severity to string - phase_to_string: convert phase to string - symbol_kind_to_string: convert symbol kind to string **Tests:** - all_modules_plus_query_concatenated_parses_and_typechecks_clean ✅ - query_gr_concatenated_exposes_expected_symbols ✅ All 10 self-hosting tests now pass. Part of #116 (Self-Hosting Epic) Closes #123 (Phase 4: Query API)
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Summary
Implements Phase 4 of the self-hosting roadmap: Query API in Gradient.
New File: compiler/query.gr
Core Types
Enums
Core Functions
Utilities
Self-Hosting Tests (All 10 Passing)
Related Issues