asegavac/boring-lang
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add trait checking

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This commit is contained in:
Andrew Segavac
2025-08-19 21:54:06 -06:00
parent d370fb44a2
commit 90381840af
6 changed files with 109 additions and 14 deletions
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24
packages/boringlang/src/parse/grammar.ts
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@@ -3,7 +3,7 @@ import * as ohm from "ohm-js";
export const boringGrammar = ohm.grammar(String.raw`
Boringlang {
ReturnStatement = "return" Expression ";"
LetStatement = "let" Identifier (":" TypeUsage)? "=" Expression ";"
LetStatement = "let" identifier (":" TypeUsage)? "=" Expression ";"
AssignmentStatement = VariableUsage "=" Expression ";"
| StructGetter "=" Expression ";"
ExpressionStatement = Expression ";"
@@ -16,12 +16,12 @@ export const boringGrammar = ohm.grammar(String.raw`
LiteralBool = "true" | "false"
LiteralString = "\"" (~"\"" any)* "\""
| "'" (~"'" any)* "'"
LiteralStructField = Identifier ":" Expression
LiteralStruct = Identifier "{" ListOf<LiteralStructField, ","> "}"
Identifier = (letter | "_")+ (letter | digit | "_")*
LiteralStructField = identifier ":" Expression
LiteralStruct = identifier "{" ListOf<LiteralStructField, ","> "}"
identifier = (letter | "_")+(letter | digit | "_")*
FunctionCall = Expression "(" ListOf<Expression, ","> ")"
StructGetter = Expression "." Identifier
VariableUsage = Identifier
StructGetter = Expression "." identifier
VariableUsage = identifier
IfExpression = "if" "(" Expression ")" Block ("else" Block)?
Term = LiteralInt
| LiteralFloat
@@ -41,16 +41,16 @@ export const boringGrammar = ohm.grammar(String.raw`
| FunctionCall
| Factor
Block = "{" Statement* Expression? "}"
NamedTypeUsage = Identifier
NamedTypeUsage = identifier
TypeUsage = NamedTypeUsage
| "fn" "(" ListOf<TypeUsage, ","> ")" ":" TypeUsage -- function_tu
FunctionArgument = Identifier ":" TypeUsage
FunctionDeclaration = "fn" Identifier "(" ListOf<FunctionArgument, ","> ")" ":" TypeUsage
FunctionArgument = identifier ":" TypeUsage
FunctionDeclaration = "fn" identifier "(" ListOf<FunctionArgument, ","> ")" ":" TypeUsage
Function = FunctionDeclaration Block
StructTypeField = Identifier ":" TypeUsage
StructTypeDeclaration = "type" Identifier "struct" "{" ListOf<StructTypeField, ","> "}"
StructTypeField = identifier ":" TypeUsage
StructTypeDeclaration = "type" identifier "struct" "{" ListOf<StructTypeField, ","> "}"
TraitMethod = FunctionDeclaration ";"
TraitTypeDeclaration = "type" Identifier "trait" "{" TraitMethod* "}"
TraitTypeDeclaration = "type" identifier "trait" "{" TraitMethod* "}"
TypeDeclaration = StructTypeDeclaration
| TraitTypeDeclaration
Impl = "impl" (NamedTypeUsage "for")? NamedTypeUsage "{" Function* "}"