diff options
Diffstat (limited to 'src/js-lang/core/parser.ts')
| -rw-r--r-- | src/js-lang/core/parser.ts | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/src/js-lang/core/parser.ts b/src/js-lang/core/parser.ts deleted file mode 100644 index f193d6a..0000000 --- a/src/js-lang/core/parser.ts +++ /dev/null @@ -1,132 +0,0 @@ -import { Token, Parse, TokenType, ASTNode, NodeType } from "../../ts-lang"; -import { lex } from "./lexer"; - -const resolveNodeFromToken = (token: Token): ASTNode => { - // FIXME not correct - if (!isNaN(Number(token.name))) { - return { - type: NodeType.INT, - name: "", - value: Number(token.name), - children: [], - }; - } - if (token.name[0] === '"' && token.name[token.name.length - 1] === '"') { - return { - type: NodeType.INT, - name: "", - value: token.name.slice(1, token.name.length - 1), - children: [], - }; - } - return { - type: NodeType.EXT, - name: token.name, - value: null, - children: [], - }; -}; - -const _parse = ({ - remainingTokens, - lastToken, - stack, -}: { - remainingTokens: Token[]; - lastToken: Token | null; - stack: ASTNode[]; -}): ASTNode | null => { - const head = remainingTokens.shift(); - if (!head) { - if (lastToken) { - (stack[stack.length - 1].children as ASTNode[]).push( - resolveNodeFromToken(lastToken) - ); - - return _parse({ - lastToken: null, - remainingTokens: [], - stack, - }); - } - - return stack[0] ?? null; - } - - if (lastToken) { - if (head.type === TokenType.NAME) { - (stack[stack.length - 1].children as ASTNode[]).push( - resolveNodeFromToken(lastToken) - ); - return _parse({ - lastToken: head, - remainingTokens, - stack, - }); - } - - if (head.type === TokenType.CLOSE_PAREN) { - const top = stack.pop()!; - (top.children as ASTNode[]).push(resolveNodeFromToken(lastToken)); - (stack[stack.length - 1].children as ASTNode[]).push(top); - - return _parse({ - lastToken: null, - remainingTokens, - stack, - }); - } - - if (head.type === TokenType.OPEN_PAREN) { - return _parse({ - lastToken: null, - remainingTokens, - stack: [...stack, resolveNodeFromToken(lastToken)], - }); - } - - throw new Error( - `${JSON.stringify({ - lastToken, - remainingTokens, - stack, - })} Was not expecting ${head.type}` - ); - } - - if (head.type === TokenType.NAME) { - return _parse({ - lastToken: head, - remainingTokens, - stack, - }); - } - - if (head.type === TokenType.CLOSE_PAREN) { - const top = stack.pop()!; - (stack[stack.length - 1].children as ASTNode[]).push(top); - - return _parse({ - lastToken: null, - remainingTokens, - stack, - }); - } - - throw new Error( - `${JSON.stringify({ - lastToken, - remainingTokens, - stack, - })} Expected nextToken to be a name or close paren at ${head.type}` - ); -}; - -export const parse = <const Raw extends readonly Token[]>( - raw: Raw -): Parse<Raw> => - _parse({ - remainingTokens: raw as unknown as Token[], - lastToken: null, - stack: [{ type: NodeType.EXT, name: "arr", value: null, children: [] }], - }) as Parse<Raw>; |
