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Code Issues 41 Packages Projects Releases Wiki Activity

add support for parsing parameterless lambdas

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This commit is contained in:
Dave Holoway
2020-06-16 15:42:48 +01:00
parent 8b71037a58
commit 9ac6086bad
2 changed files with 29 additions and 2 deletions
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25
langserver/java/body-parser3.js
View File

@@ -522,6 +522,18 @@ class BracketedExpression extends Expression {
this.expression = expression;
}
}
class LambdaExpression extends Expression {
/**
*
* @param {*[]} params
* @param {Expression|Block} body
*/
constructor(params, body) {
super();
this.params = params;
this.body = body;
}
}
class IncDecExpression extends Expression {
/**
* @param {ResolvedIdent} expr
@@ -1674,6 +1686,19 @@ function rootTerm(tokens, mdecls, scope, imports, typemap) {
return newTerm(tokens, mdecls, scope, imports, typemap);
case 'open-bracket':
tokens.inc();
if (tokens.isValue(')')) {
// parameterless lambda
tokens.expectValue('->');
let ident, lambdaBody = null;
if (tokens.current.value === '{') {
// todo - parse lambda body
skipBody(tokens);
} else {
lambdaBody = expression(tokens, mdecls, scope, imports, typemap);
ident = `() -> ${lambdaBody.source}`;
}
return new ResolvedIdent(ident, [new LambdaExpression([], lambdaBody)]);
}
matches = expression(tokens, mdecls, scope, imports, typemap);
tokens.expectValue(')');
if (isCastExpression(tokens.current, matches)) {

6
langserver/java/tokenizer.js
View File

@@ -90,7 +90,7 @@ class Token extends TextBlock {
*/
function tokenize(source, offset = 0, length = source.length) {
const text = source.slice(offset, offset + length);
const raw_token_re = /(\s+|\/\/.*|\/\*[\d\D]*?\*\/|\/\*[\d\D]*)|("[^\r\n\\"]*(?:\\.[^\r\n\\"]*)*"|".*)|('\\u[\da-fA-F]{0,4}'?|'\\?.?'?)|(\.?\d)|([\p{L}\p{N}$_]+)|(\()|([;,?:(){}\[\]@]|\.(?:\.\.)?)|([!=/%*^]=?|<<?=?|>>?>?=?|&[&=]?|\|[|=]?|(\+\+|--)|[+-]=?|~)|$/gu;
const raw_token_re = /(\s+|\/\/.*|\/\*[\d\D]*?\*\/|\/\*[\d\D]*)|("[^\r\n\\"]*(?:\\.[^\r\n\\"]*)*"|".*)|('\\u[\da-fA-F]{0,4}'?|'\\?.?'?)|(\.?\d)|([\p{L}\p{N}$_]+)|(\()|([;,?:(){}\[\]@]|\.(?:\.\.)?)|([!=/%*^]=?|<<?=?|>>?>?=?|&[&=]?|\|[|=]?|(\+\+|--)|->|[+-]=?|~)|$/gu;
const raw_token_types = [
'wsc',
'string-literal',
@@ -209,7 +209,7 @@ function tokenize(source, offset = 0, length = source.length) {
* [~!] unary
* ```
*/
const operator_re = /^(?:(=|[/%*&|^+-]=|>>>?=|<<=)|(\+\+|--)|([!=]=)|([<>]=?)|([&|^])|(<<|>>>?)|(&&|[|][|])|([*%/])|([+-])|([~!]))$/;
const operator_re = /^(?:(=|[/%*&|^+-]=|>>>?=|<<=)|(\+\+|--)|([!=]=)|([<>]=?)|([&|^])|(<<|>>>?)|(&&|[|][|])|([*%/])|(->)|([+-])|([~!]))$/;
/**
* @typedef {
'assignment-operator'|
@@ -220,6 +220,7 @@ const operator_re = /^(?:(=|[/%*&|^+-]=|>>>?=|<<=)|(\+\+|--)|([!=]=)|([<>]=?)|([
'shift-operator'|
'logical-operator'|
'muldiv-operator'|
'lambda-operator'|
'plumin-operator'|
'unary-operator'} OperatorKind
*/
@@ -233,6 +234,7 @@ const operator_token_types = [
'shift-operator',
'logical-operator',
'muldiv-operator',
'lambda-operator',
'plumin-operator',
'unary-operator',
]