diff options
Diffstat (limited to 'src/interp')
| -rw-r--r-- | src/interp/fnewmeta.lisp | 4 | ||||
| -rw-r--r-- | src/interp/lexing.boot | 12 | ||||
| -rw-r--r-- | src/interp/parsing.lisp | 16 |
3 files changed, 18 insertions, 14 deletions
diff --git a/src/interp/fnewmeta.lisp b/src/interp/fnewmeta.lisp index 62b1a34d..af2861f3 100644 --- a/src/interp/fnewmeta.lisp +++ b/src/interp/fnewmeta.lisp @@ -51,7 +51,7 @@ (MEMBER (|currentSymbol|) '(\) END\_UNIT NIL))) (DEFUN |PARSE-NewExpr| () - (OR (AND (MATCH-STRING ")") (ACTION (|processSynonyms|)) + (OR (AND (|matchString| ")") (ACTION (|processSynonyms|)) (MUST (|PARSE-Command|))) (AND (ACTION (SETQ DEFINITION_NAME (|currentSymbol|))) (|PARSE-Statement|)))) @@ -779,7 +779,7 @@ (DEFUN |PARSE-AnyId| () (OR (|parseName|) - (OR (AND (MATCH-STRING "$") + (OR (AND (|matchString| "$") (|pushReduction| '|PARSE-AnyId| (|currentSymbol|)) (ACTION (|advanceToken|))) (|parseToken| 'KEYWORD) diff --git a/src/interp/lexing.boot b/src/interp/lexing.boot index 992239e3..712b1927 100644 --- a/src/interp/lexing.boot +++ b/src/interp/lexing.boot @@ -372,6 +372,18 @@ ungetTokens() == coreError '"How many tokens do you think you have?" +++ Returns length of X if X matches initial segment of IN-STREAM. +++ Otherwise, return nil. +matchString x == + ungetTokens() + skipBlankChars() + not linePastEnd? $spadLine and currentChar() ~= nil => + nx := #x + buf := lineBuffer $spadLine + idx := lineCurrentIndex $spadLine + nx + idx > #buf => nil + and/[stringChar(x,i) = stringChar(buf,idx + i) for i in 0..nx-1] and nx + nil --% --% Stack abstract datatype. diff --git a/src/interp/parsing.lisp b/src/interp/parsing.lisp index b8ca2142..1dd53dea 100644 --- a/src/interp/parsing.lisp +++ b/src/interp/parsing.lisp @@ -350,21 +350,13 @@ the stack, then stack a NIL. Return the value of prod." ; FUNCTIONS DEFINED IN THIS SECTION: ; -; Match-String, Match-Advance-String - -(defun Match-String (x) - "Returns length of X if X matches initial segment of inputstream." - (|ungetTokens|) ; So we don't get out of synch with token stream - (|skipBlankChars|) - (if (and (not (|linePastEnd?| |$spadLine|)) (|currentChar|) ) - (initial-substring-p x - (subseq (|lineBuffer| |$spadLine|) (|lineCurrentIndex| |$spadLine|))))) +; Match-Advance-String (defun Match-Advance-String (x) - "Same as MATCH-STRING except if successful, advance inputstream past X." + "Same as matchString except if successful, advance inputstream past X." (let ((y (if (>= (length (string x)) (length (string (|quoteIfString| (|currentToken|))))) - (Match-String x) + (|matchString| x) nil))) ; must match at least the current token (if y (progn (incf (|lineCurrentIndex| |$spadLine|) y) (if (not (|linePastEnd?| |$spadLine|)) @@ -425,7 +417,7 @@ the stack, then stack a NIL. Return the value of prod." (defun termchr () "Is CHR a terminating character?" (position (|currentChar|) " *,;<>()[]/\\")) -(defun compfin () (or (match-string ")fin") (match-string ".FIN"))) +(defun compfin () (or (|matchString| ")fin") (|matchString| ".FIN"))) ; 3 C. Constructing parsing procedures |