change to semicolon handling

Author: dfirebaugh

examples/factorial.pun

@@ -8,4 +8,4 @@ i32 factorial(i32 n) {
     return result
 }
 
-println("Factorial of 5 is {}", factorial(5));
+println("Factorial of 5 is {}", factorial(5))

parser/function.go

@@ -129,6 +129,7 @@ func (p *Parser) parseFunctionCall(function ast.Expression) (ast.Expression, err
 	exp.Arguments, err = p.parseFunctionCallArguments()
 
 	p.trace("parsed function call after args", p.curToken.Literal, p.peekToken.Literal)
+
 	return exp, err
 }
 
@@ -141,10 +142,10 @@ func (p *Parser) parseFunctionCallArguments() ([]ast.Expression, error) {
 	}
 
 	if p.curTokenIs(token.RPAREN) {
-		p.nextToken() // consume the closing parenthesis
 		return args, nil
 	}
 
+	p.trace("parseFunctionCallArguments before parse expression", p.curToken.Literal, p.peekToken.Literal)
 	firstArg, err := p.parseExpression(LOWEST)
 	if err != nil {
 		return nil, err

parser/parser.go

@@ -235,9 +235,6 @@ func (p *Parser) parseExpression(precedence int) (ast.Expression, error) {
 				return nil, err
 			}
 			p.trace("parsed identifier functioncall expression", p.curToken.Literal, p.peekToken.Literal)
-			if p.curTokenIs(token.RPAREN) {
-				p.nextToken()
-			}
 			return fnCall, nil
 		}
 

parser/parsers.go

@@ -177,7 +177,7 @@ func (p *Parser) parseVariableDeclarationOrAssignment() (ast.Statement, error) {
 		return nil, p.error("expected '=' after identifier")
 	}
 
-	p.nextToken()
+	p.nextToken() // consume assign operator
 	value, err := p.parseExpression(LOWEST)
 	if err != nil {
 		return nil, err
@@ -512,12 +512,6 @@ func (p *Parser) parseForStatement() (*ast.ForStatement, error) {
 
 	p.trace("current token", p.curToken.Literal)
 
-	if !p.curTokenIs(token.SEMICOLON) {
-		return nil, p.error("expected ';' after for-init statement")
-	}
-	// Consume the ';'
-	p.nextToken()
-
 	p.trace("current token", p.curToken.Literal)
 	if !p.curTokenIs(token.SEMICOLON) {
 		stmt.Condition, err = p.parseExpression(LOWEST)