swamp_semantic/
err.rs

1/*
2 * Copyright (c) Peter Bjorklund. All rights reserved. https://github.com/swamp/swamp
3 * Licensed under the MIT License. See LICENSE in the project root for license information.
4 */
5use crate::SemanticError;
6use source_map_node::Node;
7use std::fmt;
8use std::num::{ParseFloatError, ParseIntError};
9use swamp_types::prelude::*;
10
11#[derive(Clone, Debug)]
12pub struct Error {
13    pub node: Node,
14    pub kind: ErrorKind,
15}
16#[derive(Clone, Debug)]
17pub enum ErrorKind {
18    NoAssociatedFunction(TypeRef, String),
19    MissingSubscriptMember,
20    UnusedVariablesCanNotBeMut,
21    VariableTypeMustBeBlittable(TypeRef),
22    GuardCanNotHaveMultipleWildcards,
23    WildcardMustBeLastInGuard,
24    GuardMustHaveWildcard,
25    GuardHasNoType,
26    TooManyDestructureVariables,
27    CanNotDestructure,
28    UnknownStructTypeReference,
29    DuplicateFieldName,
30    MissingFieldInStructInstantiation(Vec<String>, AnonymousStructType),
31    UnknownVariable,
32    ArrayIndexMustBeInt(TypeRef),
33    OverwriteVariableWithAnotherType,
34    NoneNeedsExpectedTypeHint,
35    ExpectedMutableLocation,
36    WrongNumberOfArguments(usize, usize),
37    CanOnlyOverwriteVariableWithMut,
38    OverwriteVariableNotAllowedHere,
39    UnknownEnumVariantType,
40    UnknownStructField,
41    UnknownEnumVariantTypeInPattern,
42    ExpectedEnumInPattern,
43    WrongEnumVariantContainer(EnumVariantType),
44    VariableIsNotMutable,
45    ArgumentIsNotMutable,
46    UnknownTypeReference,
47    SemanticError(SemanticError),
48    ExpectedOptional,
49    MapKeyTypeMismatch {
50        expected: TypeRef,
51        found: TypeRef,
52    },
53    MapValueTypeMismatch {
54        expected: TypeRef,
55        found: TypeRef,
56    },
57    IncompatibleTypes {
58        expected: TypeRef,
59        found: TypeRef,
60    },
61    UnknownMemberFunction(TypeRef),
62    ExpressionsNotAllowedInLetPattern,
63    UnknownField,
64    EnumVariantHasNoFields,
65    ExpectedTupleType,
66    TooManyTupleFields {
67        max: usize,
68        got: usize,
69    },
70    ExpectedBooleanExpression,
71    NotAnIterator,
72    IntConversionError(ParseIntError),
73    FloatConversionError(ParseFloatError),
74    BoolConversionError,
75    DuplicateFieldInStructInstantiation(String),
76    UnknownIdentifier(String),
77    NoDefaultImplemented(TypeRef),
78    UnknownConstant,
79    NotValidLocationStartingPoint,
80    CallsCanNotBePartOfChain,
81    UnwrapCanNotBePartOfChain,
82    NoneCoalesceCanNotBePartOfChain,
83    InvalidOperatorAfterOptionalChaining,
84    SelfNotCorrectType,
85    CanNotNoneCoalesce,
86    UnknownSymbol,
87    UnknownEnumType,
88    UnknownModule,
89    BreakOutsideLoop,
90    ReturnOutsideCompare,
91    EmptyMatch,
92    MatchArmsMustHaveTypes,
93    ContinueOutsideLoop,
94    ParameterIsNotMutable,
95    CouldNotCoerceTo(TypeRef),
96    UnexpectedType,
97    CanNotAttachFunctionsToType,
98    MissingMemberFunction(String, TypeRef),
99    ExpectedLambda,
100    ExpectedSlice,
101    MissingToString(TypeRef),
102    IncompatibleTypesForAssignment {
103        expected: TypeRef,
104        found: TypeRef,
105    },
106    CapacityNotEnough {
107        size_requested: usize,
108        capacity: usize,
109    },
110    ExpectedInitializerTarget {
111        destination_type: TypeRef,
112    },
113    NoInferredTypeForEmptyInitializer,
114    TooManyInitializerListElementsForStorage {
115        capacity: usize,
116    },
117    KeyVariableNotAllowedToBeMutable,
118    SelfNotCorrectMutableState,
119    NotAllowedAsReturnType(TypeRef),
120    ParameterTypeCanNotBeStorage(TypeRef),
121    OperatorProblem,
122    MatchMustHaveAtLeastOneArm,
123    NeedStorage,
124    TooManyParameters {
125        encountered: usize,
126        allowed: usize,
127    },
128    CanOnlyHaveFunctionCallAtStartOfPostfixChain,
129    CanNotSubscriptWithThatType,
130}
131
132impl fmt::Display for ErrorKind {
133    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
134        let error_message = match self {
135            Self::ExpectedTupleType => "expected tuple type",
136            Self::CanOnlyHaveFunctionCallAtStartOfPostfixChain => {
137                "function calls only allowed at start of chain"
138            }
139            Self::CanNotSubscriptWithThatType => {
140                "subscript not possible with that type"
141            }
142            // Function and Method Errors
143            Self::NoAssociatedFunction(_, _) => "no associated function",
144            Self::UnknownMemberFunction(_) => "unknown member function",
145            Self::MissingMemberFunction(_, _) => "missing member function",
146            Self::WrongNumberOfArguments(_, _) => "wrong number of arguments",
147            Self::TooManyParameters { .. } => "too many parameters",
148            Self::CallsCanNotBePartOfChain => "calls cannot be part of a chain",
149            Self::ExpectedLambda => "expected a lambda",
150
151            // Variable and Type Errors
152            Self::UnknownVariable => "unknown variable",
153            Self::UnknownIdentifier(_) => "unknown identifier",
154            Self::UnknownTypeReference => "unknown type",
155            Self::UnusedVariablesCanNotBeMut => "unused variable cannot be mutable",
156            Self::VariableTypeMustBeBlittable(_) => "variable type must be blittable",
157            Self::OverwriteVariableWithAnotherType => {
158                "cannot overwrite variable with a different type"
159            }
160            Self::IncompatibleTypes { .. } => "incompatible types",
161            Self::IncompatibleTypesForAssignment { .. } => "incompatible types for assignment",
162            Self::CouldNotCoerceTo(_) => "could not coerce to type",
163            Self::UnexpectedType => "unexpected type",
164            Self::SelfNotCorrectType => "'self' is not the correct type",
165            Self::SelfNotCorrectMutableState => "'self' has incorrect mutable state",
166            Self::NotAllowedAsReturnType(_) => "not an allowed return type",
167            Self::ParameterTypeCanNotBeStorage(_) => "parameter cannot be of storage type",
168
169            // Mutability Errors
170            Self::ExpectedMutableLocation => "expected a mutable location",
171            Self::CanOnlyOverwriteVariableWithMut => "can only overwrite mutable variables",
172            Self::OverwriteVariableNotAllowedHere => "overwriting variables is not allowed here",
173            Self::VariableIsNotMutable => "variable is not mutable",
174            Self::ArgumentIsNotMutable => "argument is not mutable",
175            Self::ParameterIsNotMutable => "parameter is not mutable",
176            Self::KeyVariableNotAllowedToBeMutable => "key variable cannot be mutable",
177
178            // Struct and Enum Errors
179            Self::UnknownStructTypeReference => "unknown struct type",
180            Self::DuplicateFieldName => "duplicate field name",
181            Self::MissingFieldInStructInstantiation(_, _) => {
182                "missing field in struct instantiation"
183            }
184            Self::UnknownStructField => "unknown struct field",
185            Self::UnknownField => "unknown field",
186            Self::DuplicateFieldInStructInstantiation(_) => {
187                "duplicate field in struct instantiation"
188            }
189            Self::UnknownEnumVariantType => "unknown enum variant",
190            Self::UnknownEnumVariantTypeInPattern => "unknown enum variant in pattern",
191            Self::ExpectedEnumInPattern => "expected an enum in pattern",
192            Self::WrongEnumVariantContainer(_) => "wrong enum variant container",
193            Self::EnumVariantHasNoFields => "enum variant has no fields",
194            Self::UnknownEnumType => "unknown enum type",
195
196            // Optional and Chaining Errors
197            Self::ExpectedOptional => "expected optional",
198            Self::NoneNeedsExpectedTypeHint => "none requires a type hint",
199            Self::UnwrapCanNotBePartOfChain => "unwrap cannot be part of a chain",
200            Self::NoneCoalesceCanNotBePartOfChain => "none coalesce cannot be part of a chain",
201            Self::InvalidOperatorAfterOptionalChaining => {
202                "invalid operator after optional chaining (?)"
203            }
204            Self::CanNotNoneCoalesce => "cannot none-coalesce",
205
206            // Pattern Matching and Destructuring Errors
207            Self::GuardCanNotHaveMultipleWildcards => "guard cannot have multiple wildcards",
208            Self::WildcardMustBeLastInGuard => "wildcard must be last in guard",
209            Self::GuardMustHaveWildcard => "guard must have a wildcard",
210            Self::GuardHasNoType => "guard has no type",
211            Self::TooManyDestructureVariables => "too many destructure variables",
212            Self::CanNotDestructure => "cannot destructure",
213            Self::ExpressionsNotAllowedInLetPattern => "expressions not allowed in let patterns",
214            Self::EmptyMatch => "match statement is empty",
215            Self::MatchArmsMustHaveTypes => "match arms must have types",
216            Self::MatchMustHaveAtLeastOneArm => "match must have at least one arm",
217
218            // Collection and Data Structure Errors
219            Self::MissingSubscriptMember => "missing subscript member",
220            Self::ArrayIndexMustBeInt(_) => "array index must be an integer",
221            Self::MapKeyTypeMismatch { .. } => "map key type mismatch",
222            Self::MapValueTypeMismatch { .. } => "map value type mismatch",
223            Self::TooManyTupleFields { .. } => "too many tuple fields",
224            Self::ExpectedSlice => "expected a slice",
225            Self::CapacityNotEnough { .. } => "capacity not enough",
226            Self::ExpectedInitializerTarget { .. } => "expected initializer target",
227            Self::NoInferredTypeForEmptyInitializer => "cannot infer type for empty initializer",
228            Self::TooManyInitializerListElementsForStorage { .. } => {
229                "too many elements for storage"
230            }
231
232            // Control Flow Errors
233            Self::BreakOutsideLoop => "break outside of a loop",
234            Self::ContinueOutsideLoop => "continue outside of a loop",
235            Self::ReturnOutsideCompare => "return outside of a compare",
236
237            // Conversion and Operator Errors
238            Self::IntConversionError(_) => "integer conversion error",
239            Self::FloatConversionError(_) => "float conversion error",
240            Self::BoolConversionError => "boolean conversion error",
241            Self::ExpectedBooleanExpression => "expected a boolean expression",
242            Self::OperatorProblem => "operator problem",
243            Self::MissingToString(_) => "missing to_string implementation",
244
245            // Miscellaneous Errors
246            Self::SemanticError(e) => return write!(f, "{e:?}"),
247            Self::NotAnIterator => "not an iterator",
248            Self::NoDefaultImplemented(_) => "no default implementation",
249            Self::UnknownConstant => "unknown constant",
250            Self::NotValidLocationStartingPoint => "not a valid location starting point",
251            Self::UnknownSymbol => "unknown symbol",
252            Self::UnknownModule => "unknown module",
253            Self::CanNotAttachFunctionsToType => "cannot attach functions to this type",
254            Self::NeedStorage => "storage needed",
255        };
256        f.write_str(error_message)
257    }
258}
259
260
261impl ErrorKind {
262    #[must_use] pub const fn code(&self) -> usize {
263        match self {
264            Self::NoAssociatedFunction(_, _) => 1,
265            Self::MissingSubscriptMember => 2,
266            Self::UnusedVariablesCanNotBeMut => 3,
267            Self::VariableTypeMustBeBlittable(_) => 4,
268            Self::GuardCanNotHaveMultipleWildcards => 5,
269            Self::WildcardMustBeLastInGuard => 6,
270            Self::GuardMustHaveWildcard => 7,
271            Self::GuardHasNoType => 8,
272            Self::TooManyDestructureVariables => 9,
273            Self::CanNotDestructure => 10,
274            Self::UnknownStructTypeReference => 11,
275            Self::DuplicateFieldName => 12,
276            Self::MissingFieldInStructInstantiation(_, _) => 13,
277            Self::UnknownVariable => 14,
278            Self::ArrayIndexMustBeInt(_) => 15,
279            Self::OverwriteVariableWithAnotherType => 16,
280            Self::NoneNeedsExpectedTypeHint => 17,
281            Self::ExpectedMutableLocation => 18,
282            Self::WrongNumberOfArguments(_, _) => 19,
283            Self::CanOnlyOverwriteVariableWithMut => 20,
284            Self::OverwriteVariableNotAllowedHere => 21,
285            Self::UnknownEnumVariantType => 22,
286            Self::UnknownStructField => 23,
287            Self::UnknownEnumVariantTypeInPattern => 24,
288            Self::ExpectedEnumInPattern => 25,
289            Self::WrongEnumVariantContainer(_) => 26,
290            Self::VariableIsNotMutable => 27,
291            Self::ArgumentIsNotMutable => 28,
292            Self::UnknownTypeReference => 29,
293            Self::SemanticError(_) => 30,
294            Self::ExpectedOptional => 31,
295            Self::MapKeyTypeMismatch { .. } => 32,
296            Self::MapValueTypeMismatch { .. } => 33,
297            Self::IncompatibleTypes { .. } => 34,
298            Self::UnknownMemberFunction(_) => 35,
299            Self::ExpressionsNotAllowedInLetPattern => 36,
300            Self::UnknownField => 37,
301            Self::EnumVariantHasNoFields => 38,
302            Self::ExpectedTupleType => 39,
303            Self::TooManyTupleFields { .. } => 40,
304            Self::ExpectedBooleanExpression => 41,
305            Self::NotAnIterator => 42,
306            Self::IntConversionError(_) => 43,
307            Self::FloatConversionError(_) => 44,
308            Self::BoolConversionError => 45,
309            Self::DuplicateFieldInStructInstantiation(_) => 46,
310            Self::UnknownIdentifier(_) => 47,
311            Self::NoDefaultImplemented(_) => 48,
312            Self::UnknownConstant => 49,
313            Self::NotValidLocationStartingPoint => 50,
314            Self::CallsCanNotBePartOfChain => 51,
315            Self::UnwrapCanNotBePartOfChain => 52,
316            Self::NoneCoalesceCanNotBePartOfChain => 53,
317            Self::InvalidOperatorAfterOptionalChaining => 54,
318            Self::SelfNotCorrectType => 55,
319            Self::CanNotNoneCoalesce => 56,
320            Self::UnknownSymbol => 57,
321            Self::UnknownEnumType => 58,
322            Self::UnknownModule => 59,
323            Self::BreakOutsideLoop => 60,
324            Self::ReturnOutsideCompare => 61,
325            Self::EmptyMatch => 62,
326            Self::MatchArmsMustHaveTypes => 63,
327            Self::ContinueOutsideLoop => 64,
328            Self::ParameterIsNotMutable => 65,
329            Self::CouldNotCoerceTo(_) => 66,
330            Self::UnexpectedType => 67,
331            Self::CanNotAttachFunctionsToType => 68,
332            Self::MissingMemberFunction(_, _) => 69,
333            Self::ExpectedLambda => 70,
334            Self::ExpectedSlice => 71,
335            Self::MissingToString(_) => 72,
336            Self::IncompatibleTypesForAssignment { .. } => 73,
337            Self::CapacityNotEnough { .. } => 74,
338            Self::ExpectedInitializerTarget { .. } => 75,
339            Self::NoInferredTypeForEmptyInitializer => 76,
340            Self::TooManyInitializerListElementsForStorage { .. } => 77,
341            Self::KeyVariableNotAllowedToBeMutable => 78,
342            Self::SelfNotCorrectMutableState => 79,
343            Self::NotAllowedAsReturnType(_) => 80,
344            Self::ParameterTypeCanNotBeStorage(_) => 81,
345            Self::OperatorProblem => 82,
346            Self::MatchMustHaveAtLeastOneArm => 83,
347            Self::NeedStorage => 84,
348            Self::TooManyParameters { .. } => 85,
349            Self::CanOnlyHaveFunctionCallAtStartOfPostfixChain => 86,
350            Self::CanNotSubscriptWithThatType => 87,
351        }
352    }
353}
354
355
356impl From<SemanticError> for Error {
357    fn from(value: SemanticError) -> Self {
358        Self {
359            node: Node::default(),
360            kind: ErrorKind::SemanticError(value),
361        }
362    }
363}
swamp_semantic/err.rs

swamp_semantic/
err.rs
